83 results on '"Fernández-Gavela A"'
Search Results
2. Silicon Photonic Label Free Biosensors with Coherent Readout.
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Jonas Leuermann, Adrián Fernández-Gavela, Robert Halir, Alejandro Ortega-Moñux, J. Gonzalo Wangüemert-Pérez, Laura M. Lechuga, and íñigo Molina-Fernández
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- 2020
- Full Text
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3. Silicon Nitride Building Blocks in the Visible Range of the Spectrum
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Blasco-Solvas, Marçal, primary, Fernández-Vior, Berta, additional, Sabek, Jad, additional, Fernández-Gavela, Adrián, additional, Domínguez-Bucio, Thalía, additional, Gardes, Frederic Y., additional, Domínguez-Horna, Carlos, additional, and Faneca, Joaquín, additional
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- 2024
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4. Current Trends in Photonic Biosensors: Advances towards Multiplexed Integration
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Jhonattan C. Ramirez, Daniel Grajales García, Jesús Maldonado, and Adrián Fernández-Gavela
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photonic biosensor ,multiplexed detection ,LOC ,real-life applications ,solutions ,Biochemistry ,QD415-436 - Abstract
In this review, we present the current trends in photonic biosensors, focusing on devices based on lab-on-a-chip (LOC) systems capable of simultaneously detecting multiple real-life diseases on a single platform. The first section lists the advantages and challenges of building LOC platforms based on integrated optics. Some of the most popular materials for the fabrication of microfluidic cells are also shown. Then, a review of the latest developments in biosensors using the evanescent wave detection principle is provided; this includes interferometric biosensors, ring resonators, and photonic crystals, including a brief description of commercial solutions, if available. Then, a review of the latest advances in surface plasmon resonance (SPR) biosensors is presented, including localized-SPRs (LSPRs). A brief comparison between the benefits and required improvements on each kind of biosensor is discussed at the end of each section. Finally, prospects in the field of LOC biosensors based on integrated optics are glimpsed.
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- 2022
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5. Interferometric nanoimmunosensor for label-free and real-time monitoring of Irgarol 1051 in seawater
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Chocarro-Ruiz, Blanca, Herranz, Sonia, Fernández Gavela, Adrián, Sanchís, Josep, Farré, Marinella, Marco, M. Pilar, and Lechuga, Laura M.
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- 2018
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6. Channel polymer optical waveguides embedded in glass: Design, fabrication and characterization
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Fernández Gavela, Adrián, García Granda, Miguel, and Rodríguez García, José
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- 2015
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7. Ultrasensitive Label-Free Detection of Unamplified Multidrug-Resistance Bacteria Genes with a Bimodal Waveguide Interferometric Biosensor
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Jesús Maldonado, Ana Belén González-Guerrero, Adrián Fernández-Gavela, Juan José González-López, and Laura M. Lechuga
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nanophotonic biosensor ,multidrug-resistance ,Escherichia coli ,bimodal waveguide interferometer ,NDM ,CTX-M ,Medicine (General) ,R5-920 - Abstract
Infections by multidrug-resistant bacteria are becoming a major healthcare emergence with millions of reported cases every year and an increasing incidence of deaths. An advanced diagnostic platform able to directly detect and identify antimicrobial resistance in a faster way than conventional techniques could help in the adoption of early and accurate therapeutic interventions, limiting the actual negative impact on patient outcomes. With this objective, we have developed a new biosensor methodology using an ultrasensitive nanophotonic bimodal waveguide interferometer (BiMW), which allows a rapid and direct detection, without amplification, of two prevalent and clinically relevant Gram-negative antimicrobial resistance encoding sequences: the extended-spectrum betalactamase-encoding gene blaCTX-M-15 and the carbapenemase-encoding gene blaNDM-5 We demonstrate the extreme sensitivity and specificity of our biosensor methodology for the detection of both gene sequences. Our results show that the BiMW biosensor can be employed as an ultrasensitive (attomolar level) and specific diagnostic tool for rapidly (less than 30 min) identifying drug resistance. The BiMW nanobiosensor holds great promise as a powerful tool for the control and management of healthcare-associated infections by multidrug-resistant bacteria.
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- 2020
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- View/download PDF
8. Current Trends in Photonic Biosensors: Advances towards Multiplexed Integration
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Ramirez, Jhonattan C., primary, Grajales García, Daniel, additional, Maldonado, Jesús, additional, and Fernández-Gavela, Adrián, additional
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- 2022
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- View/download PDF
9. Optimizing the Limit of Detection of Waveguide-Based Interferometric Biosensor Devices.
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Jonas Leuermann, Adrián Fernández-Gavela, Antonia Torres-Cubillo, Sergio Postigo, Alejandro Sánchez-Postigo, Laura M. Lechuga, Robert Halir, and íñigo Molina-Fernández
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- 2019
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10. Combining Algorithms in Automatic Detection of QRS Complexes in ECG Signals.
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Carsten Meyer, José Fernández Gavela, and Matthew Harris
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- 2006
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11. Experimentos en óptica con un teléfono móvil
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Vélez, María, Fernández Gavela, Adrián, Ferreras González, Marina, Vélez, María, Fernández Gavela, Adrián, and Ferreras González, Marina
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- 2021
12. Last Advances in Silicon-Based Optical Biosensors.
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Adrián Fernández-Gavela, Daniel Grajales García, Jhonattan C. Ramirez, and Laura M. Lechuga
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- 2016
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13. Ultrasensitive Label-Free Detection of Unamplified Multidrug-Resistance Bacteria Genes with a Bimodal Waveguide Interferometric Biosensor
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Laura M. Lechuga, Juan José González-López, Jesús Maldonado, Ana Belén González-Guerrero, Adrián Fernández-Gavela, Generalitat de Catalunya, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Instituto de Salud Carlos III, Consejo Nacional de Ciencia y Tecnología (México), European Commission, Lechuga, Laura M., and Lechuga, Laura M. [0000-0001-5187-5358]
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0301 basic medicine ,Computer science ,030106 microbiology ,Clinical Biochemistry ,Multidrug-resistance ,Bimodal waveguide ,NDM ,Drug resistance ,Computational biology ,01 natural sciences ,Article ,03 medical and health sciences ,Antibiotic resistance ,Escherichia coli ,CTX-M ,Nanophotonic biosensor ,Gene ,Label free ,lcsh:R5-920 ,biology ,010401 analytical chemistry ,Limiting ,Bimodal waveguide interferometer ,biology.organism_classification ,multidrug-resistance ,0104 chemical sciences ,Multiple drug resistance ,bimodal waveguide interferometer ,nanophotonic biosensor ,lcsh:Medicine (General) ,Biosensor ,Bacteria - Abstract
This article belongs to the Collection Diagnostic Sensors., Infections by multidrug-resistant bacteria are becoming a major healthcare emergence with millions of reported cases every year and an increasing incidence of deaths. An advanced diagnostic platform able to directly detect and identify antimicrobial resistance in a faster way than conventional techniques could help in the adoption of early and accurate therapeutic interventions, limiting the actual negative impact on patient outcomes. With this objective, we have developed a new biosensor methodology using an ultrasensitive nanophotonic bimodal waveguide interferometer (BiMW), which allows a rapid and direct detection, without amplification, of two prevalent and clinically relevant Gram-negative antimicrobial resistance encoding sequences: the extended-spectrum betalactamase-encoding gene blaCTX-M-15 and the carbapenemase-encoding gene blaNDM-5 We demonstrate the extreme sensitivity and specificity of our biosensor methodology for the detection of both gene sequences. Our results show that the BiMW biosensor can be employed as an ultrasensitive (attomolar level) and specific diagnostic tool for rapidly (less than 30 min) identifying drug resistance. The BiMW nanobiosensor holds great promise as a powerful tool for the control and management of healthcare-associated infections by multidrug-resistant bacteria., This research was supported by CERCA program/Generalitat de Catalunya. ICN2 is supported by the Severo Ochoa Program from Spanish MINECO (Grant No. SEV-2017-0706). The VHIR-HUVH is supported by Plan Nacional de I+D+i 2013-2016 and Instituto de Salud Carlos III, Subdirección General de Redes y Centros de Investigación Cooperativa, Ministerio de Economía, Industria y Competitividad, Spanish Network for Research in Infectious Diseases (REIPI RD16/0016/0003), co-financed by the European Development Regional Fund “A way to achieve Europe”. Authors acknowledge the support of project ASPIRE (funded by CIBER-BBN). J. Maldonado acknowledges the Mexican National Council for Science and Technology (CONACYT). This work has made use of the Biodeposition and Biodetection Unit from ICTS NANBIOSIS partially supported by MICINN/FEDER (FICTS- 1420- 27).
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- 2020
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14. Low Limit of Detection Silicon Photonic Sensor with Extremely-Low-Cost Laser Source
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Alejandro Sánchez-Postigo, Jonas Leuermann, Íñigo Molina-Fernández, Robert Halir, Laura M. Lechuga, and Adrián Fernández-Gavela
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Detection limit ,Materials science ,Silicon photonics ,020205 medical informatics ,Biosensing ,business.industry ,Laser source ,02 engineering and technology ,Laser ,law.invention ,Coherent detection ,law ,Biosensores ,Fotónica ,Rayos láser ,0202 electrical engineering, electronic engineering, information engineering ,Optoelectronics ,Photonics ,business ,Refractive index ,Biosensor - Abstract
Integrated photonic biosensors have demonstrated low bulk detection limits down to 1e−7 refractive index units. Nevertheless, most rely on expensive optical sources, such as DFB lasers. Here, we experimentally demonstrate that with adequate sensor design comparable detection limits are achievable with a low-cost Fabry-Perot laser. European Union’s Horizon 2020, Marie Skłodowska-Curie grant agreement No 713721; Ministerio de Econom ́ıa y Competitividad (FEDER), Proyecto TEC2016-80718-R; Programa Operativo FEDER Andalucía 2014-2020 (UMA18-FEDERJA-219); Severo Ochoa program from Spanish MINECO, Grant No. SEV-2017-0706, Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech
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- 2020
15. Silicon Photonic Label Free Biosensors with Coherent Readout
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Juan Gonzalo Wanguemert-Perez, Robert Halir, Íñigo Molina-Fernández, Alejandro Ortega-Moñux, Jonas Leuermann, Laura M. Lechuga, and Adrián Fernández-Gavela
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Silicon photonics ,Materials science ,business.industry ,Dynamic range ,Physics::Optics ,Optical ring resonators ,Laser ,law.invention ,chemistry.chemical_compound ,Interferometry ,Silicon nitride ,chemistry ,law ,Optoelectronics ,Photonics ,business ,Biosensor - Abstract
Silicon photonics enables sensitive and label-free optical biosensors for the detection of chemical and biological substances. Different sensing architectures have been used to improve the limit of detection and increase the dynamic range response. Here, we show experimental limit of detection at state-of-the-art level using silicon nitride integrated Mach-Zehnder interferometers with coherent read-out. These preliminary results are concordant with theoretical results, showing that the proposed approach enables the use of simple read-out equipment using low-cost laser sources.
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- 2020
16. Label-free detection of nosocomial bacteria using a nanophotonic interferometric biosensor
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Laura M. Lechuga, Adrián Fernández-Gavela, Juan José González-López, Ana Belén González-Guerrero, Jesús Maldonado, and M.-Carmen Estevez
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Methicillin-Resistant Staphylococcus aureus ,Biosensor device ,Aptamer ,Biosensing Techniques ,02 engineering and technology ,medicine.disease_cause ,01 natural sciences ,Biochemistry ,Analytical Chemistry ,Microbiology ,Electrochemistry ,medicine ,Humans ,Environmental Chemistry ,Pathogen ,Spectroscopy ,Detection limit ,Cross Infection ,medicine.diagnostic_test ,Chemistry ,Pseudomonas aeruginosa ,010401 analytical chemistry ,Staphylococcal Infections ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Interferometry ,Staphylococcus aureus ,Immunoassay ,0210 nano-technology ,Biosensor - Abstract
Nosocomial infections are a major concern at the worldwide level. Early and accurate identification of nosocomial pathogens is crucial to provide timely and adequate treatment. A prompt response also prevents the progression of the infection to life-threatening conditions, such as septicemia or generalized bloodstream infection. We have implemented two highly sensitive methodologies using an ultrasensitive photonic biosensor based on a bimodal waveguide interferometer (BiMW) for the fast detection of Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus (MRSA), two of the most prevalent bacteria associated with nosocomial infections. For that, we have developed a biofunctionalization strategy based on the use of a PEGylated silane (silane-PEG-COOH) which provides a highly resistant and bacteria-repelling surface, which is crucial to specifically detect each bacterium. Two different biosensor assays have been set under standard buffer conditions: one based on a specific direct immunoassay employing polyclonal antibodies for the detection of P. aeruginosa and another one employing aptamers for the direct detection of MRSA. The biosensor immunoassay for P. aeruginosa is fast (it only takes 12 min) and specific and has experimentally detected concentrations down to 800 cfu mL-1 (cfu: colony forming unit). The second one relies on the use of an aptamer that specifically detects penicillin-binding protein 2a (PBP2a), a protein only expressed in the MRSA mutant, providing a photonic biosensor with the ability to identify the resistant pathogen MRSA and differentiate it from methicillin-susceptible S. aureus (MSSA). Direct, label-free, and selective detection of whole MRSA bacteria has been achieved, making possible the direct detection of also 800 cfu mL-1. According to the signal-to-noise (S/N) ratio of the device, a theoretical limit of detection (LOD) of around 49 and 29 cfu mL-1 was estimated for P. aeruginosa and MRSA, respectively. Both results obtained under standard conditions reveal the great potential this interferometric biosensor device has as a versatile and specific tool for bacterial detection and quantification, providing a rapid method for the identification of nosocomial pathogens within the clinical requirements of sensitivity for the diagnosis of infections.
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- 2020
17. Coherent silicon photonic interferometric biosensor with an inexpensive laser source for sensitive label-free immunoassays
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Jonas Leuermann, Daniel Collado, Alejandro Sánchez-Postigo, Cole A. Chapman, Robert Halir, Adrián Fernández-Gavela, Vladimir Stamenkovic, Ryan C. Bailey, Patricia Ramirez-Priego, Íñigo Molina-Fernández, Laura M. Lechuga, Ezequiel Perez-Inestrosa, European Commission, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Junta de Andalucía, [Leuermann,J, Stamenkovic,V, Perez-Inestrosa,E, Collado,D, Halir,R, Molina-Fernández,Í] Bionand Center for Nanomedicine and Biotechnology, Málaga, Spain. [Leuermann,J, Sánchez-Postigo,A, Molina-Fernández,Í] Departamento de Ingeniería de Comunicaciones, University of Málaga, ETSI Telecomunicación, Málaga, Spain. [Stamenkovic,V, Collado,D] Departamento de Química Orgánica, Facultad de Ciencias, University of Málaga, Málaga, Spain. [Ramirez-Priego,P, Lechuga,LM] Nanobiosensors and Bioanalytical Applications Group, Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC, BIST and CIBER-BBN Campus UAB, Barcelona, Spain. [Fernández-Gavela,A] Departamento de Física, Universidad de Oviedo, Oviedo, Spain. [Chapman,CA, Bailey,RC] Department of Chemistry, University of Michigan, Ann Arbor, Michigan, USA., Horizon 2020 Framework Programme (EuroNanoMed 3-H2020 DrNanoDAII), Ministerio de Economía y Competitividad (2019/PCI 2019-2, CTQ2017-86994-R, SEV-2017-0706), Junta de Andalucía, Proyectos Excelencia-Retos (P18-RT-1453, P18-RT-793), Fondos Europeos de Desarrollo Regional (CTQ2016-75870-P, PID2019-104293GB-I00, RD16/0006/0012, TEC2016-80718-R, UMA18-FEDERJA-007, UMA18-FEDERJA-219), and H2020 Marie Skłodowska-Curie Actions (713721).
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Optics and Photonics ,Photon ,Interferometría ,Limit of detection ,Interferometric sensor ,Fotones ,Biosensing Techniques ,02 engineering and technology ,C-reactive proteins ,01 natural sciences ,law.invention ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Immunologic Techniques::Immunoassay [Medical Subject Headings] ,law ,Rayos laser ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Equipment and Supplies::Optical Devices::Lasers [Medical Subject Headings] ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Molecular Probe Techniques::Biosensing Techniques [Medical Subject Headings] ,Immunoassay ,Proteína C-Reactiva ,Analytical, Diagnostic and Therapeutic Techniques and Equipment::Investigative Techniques::Interferometry [Medical Subject Headings] ,Chemicals and Drugs::Amino Acids, Peptides, and Proteins::Proteins::Albumins::C-Reactive Protein [Medical Subject Headings] ,Photochemical Processes ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,3. Good health ,Interferometry ,C-Reactive Protein ,Límite de detección ,Inmunoensayo ,Detection limits ,0210 nano-technology ,Silicon ,Materials science ,Laser source ,Técnicas biosensibles ,Integrated photonics ,Low concentrations ,Phenomena and Processes::Physical Phenomena::Optical Phenomena::Light::Photons [Medical Subject Headings] ,010309 optics ,Optics ,0103 physical sciences ,Fading ,Photons ,Silicon photonics ,business.industry ,Lasers ,Limits of detection ,Optical bio-sensors ,Laser ,Telecom wavelengths ,Photonics ,Biosensing techniques ,business ,Biosensor - Abstract
Over the past two decades, integrated photonic sensors have been of major interest to the optical biosensor community due to their capability to detect low concentrations of molecules with label-free operation. Among these, interferometric sensors can be read-out with simple, fixed-wavelength laser sources and offer excellent detection limits but can suffer from sensitivity fading when not tuned to their quadrature point. Recently, coherently detected sensors were demonstrated as an attractive alternative to overcome this limitation. Here we show, for the first time, to the best of our knowledge, that this coherent scheme provides sub-nanogram per milliliter limits of detection in C-reactive protein immunoassays and that quasi-balanced optical arm lengths enable operation with inexpensive Fabry–Perot-type lasers sources at telecom wavelengths., Horizon 2020 Framework Programme (EuroNanoMed 3-H2020 DrNanoDAII); Ministerio de Economía y Competitividad (2019/PCI 2019-2, CTQ2017-86994-R, SEV-2017-0706); Junta de Andalucía, Proyectos Excelencia-Retos (P18-RT-1453, P18-RT-793); Fondos Europeos de Desarrollo Regional (CTQ2016-75870-P, PID2019-104293GB-I00, RD16/0006/0012, TEC2016-80718-R, UMA18-FEDERJA-007, UMA18-FEDERJA-219); H2020 Marie Skłodowska-Curie Actions (713721).
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- 2020
18. Coherent silicon photonic interferometric biosensor with an inexpensive laser source for sensitive label-free immunoassays
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Leuermann, Jonas, Stamenkovic, Vladimir, Ramirez Priego, Patricia, Sánchez-Postigo, Alejandro, Fernández-Gavela, Adrián, Chapman, Cole A., Bailey, Ryan C., Lechuga, Laura, Perez-Inestrosa, Ezequiel, Collado, Daniel, Halir, Robert, Molina-Fernández, Íñigo, Leuermann, Jonas, Stamenkovic, Vladimir, Ramirez Priego, Patricia, Sánchez-Postigo, Alejandro, Fernández-Gavela, Adrián, Chapman, Cole A., Bailey, Ryan C., Lechuga, Laura, Perez-Inestrosa, Ezequiel, Collado, Daniel, Halir, Robert, and Molina-Fernández, Íñigo
- Abstract
Altres ajuts: Junta de Andaluc?a, Proyectos Excelencia-Retos (P18-RT-1453, P18-RT-793); Fondos Europeos de Desarrollo Regional (UMA18-FEDERJA-007, UMA18-FEDERJA-219)., L'article s'ha publicat sota la OSA Open Access Publishing Agreement https://www.osapublishing.org/submit/review/pdf/OSACopyTransferOAAgrmnt(2017-09-05).pdf, Over the past two decades, integrated photonic sensors have been of major interest to the optical biosensor community due to their capability to detect low concentrations of molecules with label-free operation. Among these, interferometric sensors can be read-out with simple, fixed-wavelength laser sources and offer excellent detection limits but can suffer from sensitivity fading when not tuned to their quadrature point. Recently, coherently detected sensors were demonstrated as an attractive alternative to overcome this limitation. Here we show, for the first time, to the best of our knowledge, that this coherent scheme provides sub-nanogram per milliliter limits of detection in C-reactive protein immunoassays and that quasi-balanced optical arm lengths enable operation with inexpensive Fabry-Perot-type lasers sources at telecom wavelengths.
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- 2020
19. Coherent silicon photonic interferometric biosensor with an inexpensive laser source for sensitive label-free immunoassays
- Author
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European Commission, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Junta de Andalucía, Leuermann, Jonas, Stamenkovic, Vladimir, Ramirez-Priego, Patricia, Sánchez Postigo, Alejandro, Fernández Gavela, Adrián, Chapman, Cole A., Bailey, Ryan C., Lechuga, Laura M., Pérez-Inestrosa, Ezequiel, Collado, Daniel, Halir, Robert, Molina Fernández, Íñigo, European Commission, Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Junta de Andalucía, Leuermann, Jonas, Stamenkovic, Vladimir, Ramirez-Priego, Patricia, Sánchez Postigo, Alejandro, Fernández Gavela, Adrián, Chapman, Cole A., Bailey, Ryan C., Lechuga, Laura M., Pérez-Inestrosa, Ezequiel, Collado, Daniel, Halir, Robert, and Molina Fernández, Íñigo
- Abstract
Over the past two decades, integrated photonic sensors have been of major interest to the optical biosensor community due to their capability to detect low concentrations of molecules with label-free operation. Among these, interferometric sensors can be read-out with simple, fixed-wavelength laser sources and offer excellent detection limits but can suffer from sensitivity fading when not tuned to their quadrature point. Recently, coherently detected sensors were demonstrated as an attractive alternative to overcome this limitation. Here we show, for the first time, to the best of our knowledge, that this coherent scheme provides sub-nanogram per milliliter limits of detection in C-reactive protein immunoassays and that quasi-balanced optical arm lengths enable operation with inexpensive Fabry–Perot-type lasers sources at telecom wavelengths.
- Published
- 2020
20. Ultrasensitive label-free detection of unamplified multidrug-resistance bacteria genes with a bimodal waveguide interferometric biosensor
- Author
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Generalitat de Catalunya, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Instituto de Salud Carlos III, Consejo Nacional de Ciencia y Tecnología (México), European Commission, Lechuga, Laura M. [0000-0001-5187-5358], Maldonado, Jesús, González-Guerrero, Ana Belén, Fernández Gavela, Adrián, González-López, Juan José, Lechuga, Laura M., Generalitat de Catalunya, Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), Instituto de Salud Carlos III, Consejo Nacional de Ciencia y Tecnología (México), European Commission, Lechuga, Laura M. [0000-0001-5187-5358], Maldonado, Jesús, González-Guerrero, Ana Belén, Fernández Gavela, Adrián, González-López, Juan José, and Lechuga, Laura M.
- Abstract
Infections by multidrug-resistant bacteria are becoming a major healthcare emergence with millions of reported cases every year and an increasing incidence of deaths. An advanced diagnostic platform able to directly detect and identify antimicrobial resistance in a faster way than conventional techniques could help in the adoption of early and accurate therapeutic interventions, limiting the actual negative impact on patient outcomes. With this objective, we have developed a new biosensor methodology using an ultrasensitive nanophotonic bimodal waveguide interferometer (BiMW), which allows a rapid and direct detection, without amplification, of two prevalent and clinically relevant Gram-negative antimicrobial resistance encoding sequences: the extended-spectrum betalactamase-encoding gene blaCTX-M-15 and the carbapenemase-encoding gene blaNDM-5 We demonstrate the extreme sensitivity and specificity of our biosensor methodology for the detection of both gene sequences. Our results show that the BiMW biosensor can be employed as an ultrasensitive (attomolar level) and specific diagnostic tool for rapidly (less than 30 min) identifying drug resistance. The BiMW nanobiosensor holds great promise as a powerful tool for the control and management of healthcare-associated infections by multidrug-resistant bacteria.
- Published
- 2020
21. Aplicación de un teléfono móvil inteligente en un laboratorio de física experimental
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Vélez, María, Fernández Gavela, Adrián, Fumanal Sejas, Pedro, Vélez, María, Fernández Gavela, Adrián, and Fumanal Sejas, Pedro
- Abstract
En 1969 durante la carrera espacial, Estados Unidos y la Unión Soviética competían por ver quién lograba enviar primero un humano a la Luna y hacerle regresar. Como bien sabemos, el 16 de Julio la NASA lanzó la misión Apolo 11 al espacio y el 20 de julio Neil Armstrong pisó la superficie lunar por primera vez en la historia. El desembolso necesario para lograr tal empresa fue de más de 20.000 millones de dólares de la época, el equivalente a 150.000 millones en la actualidad, los equipos utilizados eran tecnología punta de la época. Sin embargo hoy en día contamos con una potencia de procesamiento incomparable con la de entonces, no sólo en los grandes centros de supercomputación y ordenadores personales, sino también en forma de dispositivo portátil en el caso de los teléfonos móviles. Literalmente cualquier persona que posea un teléfono móvil inteligente lleva una potencia de procesamiento en su bolsillo mayor de la que toda la NASA disponía en 1969. No solo eso, sino que para ofrecer el mayor número de funcionalidades posibles los teléfonos vienen equipados con multitud de sensores: de proximidad, de luminosidad, de campo magnético, de posición, de aceleración, de presión atmosférica, de sonido, etc. El objetivo de este trabajo es llevar a cabo la implementación del teléfono como una herramienta de laboratorio más, de modo que se puedan emplear sus diferentes sensores para la realización de experimentos. Para ello nos hemos centrado en los experimentos docentes de la asignatura Técnicas Experimentales I buscando la forma de replicar, mediante el empleo del teléfono móvil, los resultados arrojados por los dispositivos específicos con los que cuenta el laboratorio docente. Entre las posibles ventajas de este proyecto se podrían destacar la posibilidad de realizar los experimentos en casi cualquier lugar y momento sin necesidad de acudir al laboratorio, un posible incremento del interés de los alumnos al introducir el componente tecnológico en la asignatura de Técni
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- 2020
22. Coherent silicon photonic interferometric biosensor with an inexpensive laser source for sensitive label-free immunoassays
- Author
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Leuermann, Jonas, primary, Stamenkovic, Vladimir, additional, Ramirez-Priego, Patricia, additional, Sánchez-Postigo, Alejandro, additional, Fernández-Gavela, Adrián, additional, Chapman, Cole A., additional, Bailey, Ryan C., additional, Lechuga, Laura M., additional, Perez-Inestrosa, Ezequiel, additional, Collado, Daniel, additional, Halir, Robert, additional, and Molina-Fernández, Íñigo, additional
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- 2020
- Full Text
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23. Ultrasensitive Label-Free Detection of Unamplified Multidrug-Resistance Bacteria Genes with a Bimodal Waveguide Interferometric Biosensor
- Author
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Maldonado, Jesús, primary, González-Guerrero, Ana Belén, additional, Fernández-Gavela, Adrián, additional, González-López, Juan José, additional, and Lechuga, Laura M., additional
- Published
- 2020
- Full Text
- View/download PDF
24. Label-free detection of nosocomial bacteria using a nanophotonic interferometric biosensor
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Maldonado, Jesús, primary, Estévez, M.-Carmen, additional, Fernández-Gavela, Adrián, additional, González-López, Juan José, additional, González-Guerrero, Ana Belén, additional, and Lechuga, Laura M., additional
- Published
- 2020
- Full Text
- View/download PDF
25. Low-cost vertical taper for highly efficient light in-coupling in bimodal nanointerferometric waveguide biosensors
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Carlos Domínguez, Daniel Grajales, Adrián Fernández Gavela, J.R. Sendra, Laura M. Lechuga, Ministerio de Industria, Energía y Turismo (España), Generalitat de Catalunya, and Consejo Nacional de Ciencia y Tecnología (México)
- Subjects
Photonic devices ,Political science ,Welfare economics ,Integrated optics ,Christian ministry ,ICTS ,Light coupling ,Electrical and Electronic Engineering ,Interferometer ,Atomic and Molecular Physics, and Optics ,Biosensor ,Electronic, Optical and Magnetic Materials - Abstract
There is still the need for a compact and cost-effective solution for efficient light in-coupling in integrated waveguides employed in photonic biosensors, especially when these waveguides are of submicron dimensions and operate at visible wavelengths. The employment of a vertically stacked taper with a larger input area is proposed to meet this need. The design of the taper is divided into two stages: in the first stage, light is guided downwards by two vertically stacked tapers; in the second stage, an inverted taper directly confines the light inside the waveguide. The design parameters are optimized using commercial software, obtaining a total theoretical light coupling efficiency of 72.25%. The taper is manufactured using SU-8 polymer as the main material, employing standard photolithography techniques at wafer level. After characterization, the results show the practicality of the taper when coupling light from macrometric sources to nanometric waveguides, obtaining an experimental coupling efficiency of 55%. With this vertical taper, a compact, easy-to-couple and cost-effective solution is achieved for waveguide-based biosensors operating at visible wavelengths, opening the way for a truly portable point-of-care biosensor for low-cost and label-free diagnostics., This research was funded by Acción Estratégica Economía y Sociedad Digital (AEESD)-Ministerio de Industria, Energía y Turismo (MINETUR). The ICN2 is funded by the CERCA programme/Generalitat de Catalunya. The ICN2 is supported by the Severo Ochoa programme of the Spanish Ministry of Economy, Industry and Competitiveness (MINECO, grant SEV-2013-0295). This work has made use of the Spanish ICTS Network MICRONANOFABS partially supported by MEINCOM. D. Grajales acknowledges CONACYT (Mexican Council of Science and Technology) CVU 397275, contract SICOB 218103.
- Published
- 2019
26. Optimizing the limit of detection of waveguide-based interferometric biosensor devices
- Author
-
European Commission, Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Universidad de Málaga, Junta de Andalucía, Leuermann, Jonas, Fernández Gavela, Adrián, Torres Cubillo, Antonia, Postigo, Sergio, Sánchez Postigo, Alejandro, Lechuga, Laura M., Halir, Robert, Molina Fernández, Íñigo, European Commission, Agencia Estatal de Investigación (España), Ministerio de Economía y Competitividad (España), Universidad de Málaga, Junta de Andalucía, Leuermann, Jonas, Fernández Gavela, Adrián, Torres Cubillo, Antonia, Postigo, Sergio, Sánchez Postigo, Alejandro, Lechuga, Laura M., Halir, Robert, and Molina Fernández, Íñigo
- Abstract
Waveguide-based photonic sensors provide a unique combination of high sensitivity, compact size and label-free, multiplexed operation. Interferometric configurations furthermore enable a simple, fixed-wavelength read-out making them particularly suitable for low-cost diagnostic and monitoring devices. Their limit of detection, i.e., the lowest analyte concentration that can be reliably observed, mainly depends on the sensors response to small refractive index changes, and the noise in the read-out system. While enhancements in the sensors response have been extensively studied, noise optimization has received much less attention. Here we show that order-of-magnitude enhancements in the limit of detection can be achieved through systematic noise reduction, and demonstrate a limit of detection of ∼ 10−8RIU with a silicon nitride sensor operating at telecom wavelengths.
- Published
- 2019
27. Low-cost vertical taper for highly efficient light in-coupling in bimodal nanointerferometric waveguide biosensors
- Author
-
Ministerio de Industria, Energía y Turismo (España), Generalitat de Catalunya, Consejo Nacional de Ciencia y Tecnología (México), Grajales García, Daniel, Fernández Gavela, Adrián, Domínguez, Carlos, Sendra, José Ramón, Lechuga, Laura M., Ministerio de Industria, Energía y Turismo (España), Generalitat de Catalunya, Consejo Nacional de Ciencia y Tecnología (México), Grajales García, Daniel, Fernández Gavela, Adrián, Domínguez, Carlos, Sendra, José Ramón, and Lechuga, Laura M.
- Abstract
There is still the need for a compact and cost-effective solution for efficient light in-coupling in integrated waveguides employed in photonic biosensors, especially when these waveguides are of submicron dimensions and operate at visible wavelengths. The employment of a vertically stacked taper with a larger input area is proposed to meet this need. The design of the taper is divided into two stages: in the first stage, light is guided downwards by two vertically stacked tapers; in the second stage, an inverted taper directly confines the light inside the waveguide. The design parameters are optimized using commercial software, obtaining a total theoretical light coupling efficiency of 72.25%. The taper is manufactured using SU-8 polymer as the main material, employing standard photolithography techniques at wafer level. After characterization, the results show the practicality of the taper when coupling light from macrometric sources to nanometric waveguides, obtaining an experimental coupling efficiency of 55%. With this vertical taper, a compact, easy-to-couple and cost-effective solution is achieved for waveguide-based biosensors operating at visible wavelengths, opening the way for a truly portable point-of-care biosensor for low-cost and label-free diagnostics.
- Published
- 2019
28. Full integration of photonic nanoimmunosensors in portable platforms for on-line monitoring of ocean pollutants
- Author
-
European Commission, Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Fernández Gavela, Adrián, Herranz, Sonia, Chocarro Ruiz, Blanca, Falke, Floris, Schreuder, Erik, Leeuwis, Henk, Heideman, René G., Lechuga, Laura M., European Commission, Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Fernández Gavela, Adrián, Herranz, Sonia, Chocarro Ruiz, Blanca, Falke, Floris, Schreuder, Erik, Leeuwis, Henk, Heideman, René G., and Lechuga, Laura M.
- Abstract
We have developed a photonic nano-immunosensor platform for the on-site analysis of harmful organic ocean pollutants, intended to be allocated in stand-alone buoys. The main aim is bringing the monitoring tools directly to the contaminated place, resulting in cost and time savings as compared to the standard analytical techniques. As sensor we have employed an integrated asymmetric Mach-Zehnder interferometer (aMZI) of micro/nano dimensions, based on silicon photonic technology. In order to obtain a multiplexed system, a four-channel microfluidic cell has been designed, manufactured and incorporated in the miniaturized sensor. Additionally, a microfluidic delivery module enabling automatic sample analysis has been designed, evaluated and assembled. Moreover, we have implemented the optical interconnections of the sensor chip by fiber optics, as well the electronics and the required software and data processing. Pollutant detection is based on a competitive immunoassay using bioreceptors previously biofunctionalized on the aMZI sensor arms and incubation with a specific antibody. As proof of concept, two types of pollutants have been analysed: the biocide Irgarol 1051, and the antibiotic Tetracycline. Results show limits of detection in the range of few ng/mL, accomplished the European legislation.
- Published
- 2019
29. Interferometric nanoimmunosensor for label-free and real-time monitoring of Irgarol 1051 in seawater
- Author
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Josep Sanchís, Blanca Chocarro-Ruiz, Sonia Herranz, M.-Pilar Marco, Laura M. Lechuga, Marinella Farré, and Adrián Fernández Gavela
- Subjects
Biomedical Engineering ,Biophysics ,02 engineering and technology ,Biosensing Techniques ,01 natural sciences ,Irgarol 1051 ,Nanosensor ,Limit of Detection ,Electrochemistry ,Seawater ,Label free ,Maximum Allowable Concentration ,Detection limit ,Pollutant ,Chromatography ,Chemistry ,Triazines ,010401 analytical chemistry ,Environmental monitoring ,General Medicine ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Interferometry ,Competitive immunoassay ,Bimodal waveguide biosensor ,0210 nano-technology ,Water Pollutants, Chemical ,Biotechnology ,Environmental Monitoring - Abstract
An interferometric nanobiosensor for the specific and label-free detection of the pollutant Irgarol 1051 directly in seawater has been settled. Due to the low molecular weight of Irgarol pollutant and its expected low concentration in seawater, the sensor is based on a competitive inhibition immunoassay. Parameters as surface biofunctionalization, concentration of the selective antibody and regeneration conditions have been carefully evaluated. The optimized immunosensor shows a limit of detection of only 3 ng/L, well below the 16 ng/L set by the EU as the maximum allowable concentration in seawater. It can properly operate during 30 assay-regeneration cycles using the same sensor biosurface and with a time-to-result of only 20 min for each cycle. Moreover, the interferometric nanosensor is able to directly detect low concentrations of Irgarol 1051 in seawater without requiring sample pre-treatments and without showing any background signal due to sea matrix effect.
- Published
- 2018
30. Full integration of photonic nanoimmunosensors in portable platforms for on-line monitoring of ocean pollutants
- Author
-
Fernández-Gavela, Adrián, primary, Herranz, Sonia, additional, Chocarro, Blanca, additional, Falke, Floris, additional, Schreuder, Erik, additional, Leeuwis, Henk, additional, Heideman, René G., additional, and Lechuga, Laura M., additional
- Published
- 2019
- Full Text
- View/download PDF
31. Optimizing the Limit of Detection of Waveguide-Based Interferometric Biosensor Devices
- Author
-
Leuermann, Jonas, primary, Fernández-Gavela, Adrián, additional, Torres-Cubillo, Antonia, additional, Postigo, Sergio, additional, Sánchez-Postigo, Alejandro, additional, Lechuga, Laura M., additional, Halir, Robert, additional, and Molina-Fernández, Íñigo, additional
- Published
- 2019
- Full Text
- View/download PDF
32. Low-cost vertical taper for highly efficient light in-coupling in bimodal nanointerferometric waveguide biosensors
- Author
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Grajales, Daniel, primary, Fernández Gavela, Adrián, additional, Domínguez, Carlos, additional, Sendra, Jose Ramón, additional, and Lechuga, Laura M, additional
- Published
- 2019
- Full Text
- View/download PDF
33. An automated optofluidic biosensor platform combining interferometric sensors and injection moulded microfluidics
- Author
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Khashayar Khoshmanesh, J. Roccisano, Arnan Mitchell, Laura M. Lechuga, Crispin Szydzik, Sonia Herranz, Adrián Fernández Gavela, Markus Knoerzer, and Peter Thurgood
- Subjects
Engineering ,Optics and Photonics ,Fabrication ,Point-of-Care Systems ,Microfluidics ,Biomedical Engineering ,Bioengineering ,Nanotechnology ,Context (language use) ,02 engineering and technology ,Biosensing Techniques ,01 natural sciences ,Biochemistry ,Lab-On-A-Chip Devices ,Microtechnology ,Fluidics ,Immunoassay ,business.industry ,010401 analytical chemistry ,technology, industry, and agriculture ,General Chemistry ,Microfluidic Analytical Techniques ,021001 nanoscience & nanotechnology ,Automation ,0104 chemical sciences ,Photonics ,0210 nano-technology ,business ,Biosensor - Abstract
A primary limitation preventing practical implementation of photonic biosensors within point-of-care platforms is their integration with fluidic automation subsystems. For most diagnostic applications, photonic biosensors require complex fluid handling protocols; this is especially prominent in the case of competitive immunoassays, commonly used for detection of low-concentration, low-molecular weight biomarkers. For this reason, complex automated microfluidic systems are needed to realise the full point-of-care potential of photonic biosensors. To fulfil this requirement, we propose an on-chip valve-based microfluidic automation module, capable of automating such complex fluid handling. This module is realised through application of a PDMS injection moulding fabrication technique, recently described in our previous work, which enables practical fabrication of normally closed pneumatically actuated elastomeric valves. In this work, these valves are configured to achieve multiplexed reagent addressing for an on-chip diaphragm pump, providing the sample and reagent processing capabilities required for automation of cyclic competitive immunoassays. Application of this technique simplifies fabrication and introduces the potential for mass production, bringing point-of-care integration of complex automated microfluidics into the realm of practicality. This module is integrated with a highly sensitive, label-free bimodal waveguide photonic biosensor, and is demonstrated in the context of a proof-of-concept biosensing assay, detecting the low-molecular weight antibiotic tetracycline.
- Published
- 2017
34. Nanophotonic interferometric immunosensors for label-free and real-time monitoring of chemical contaminants in marine environment
- Author
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Blanca Chocarro-Ruiz, Sonia Herranz, Laura M. Lechuga, and A. Fernández Gavela
- Subjects
Materials science ,business.industry ,010401 analytical chemistry ,Nanophotonics ,Environmental monitoring ,Nanotechnology ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Toxic chemical ,Environmental pollutants ,0104 chemical sciences ,Interferometry ,Silanization ,Chemical contaminants ,14. Life underwater ,Photonics ,Interferometric biosensors ,0210 nano-technology ,business ,Biosensor ,Label free - Abstract
With the aim to prevent the oceans ecosystems degradation, there is an urgent need to develop portable sensing tools able to operate directly in the environment, avoiding the transportation of the ocean samples to analytical laboratories. To achieve this long-term objective, we describe here the work carried out to develop and characterize a multiplexed photonic immunosensor for the direct analysis of toxic chemical targets in marine samples. We have employed immunosensors based on photonic Bimodal Waveguide (BiMW) interferometric devices fabricated in silicon technologies combined with specific receptors and antibodies for the targeted chemical targets. Several procedures for the functionalization of the S₃iN₄ sensor surfaces have been evaluated based on wet silanization methods and further covalent receptor immobilization. The developed immunosensors, based on competitive inhibition assays, show LODs at μg/L or ng/L levels, depending on the analyzed chemical target.
- Published
- 2017
35. Nanophotonic label-free biosensors for environmental monitoring
- Author
-
Adrián Fernández-Gavela, Laura M. Lechuga, Blanca Chocarro-Ruiz, and Sonia Herranz
- Subjects
Computer science ,Biomedical Engineering ,Nanophotonics ,Bioengineering ,Nanotechnology ,02 engineering and technology ,Biosensing Techniques ,01 natural sciences ,Multiplexing ,Environmental monitoring ,Miniaturization ,Label free biosensor ,Label free ,Environmental surveillance ,010401 analytical chemistry ,Localized surface plasmon resonance ,Surface Plasmon Resonance ,021001 nanoscience & nanotechnology ,Early Warning System ,0104 chemical sciences ,Microcavity resonator ,Label-free biosensor ,Pollutant sources ,0210 nano-technology ,Biosensor ,Label-free detection ,Biotechnology ,Environmental Monitoring - Abstract
The field of environmental monitoring has experienced a substantial progress in the last years but still the on-site control of contaminants is an elusive problem. In addition, the growing number of pollutant sources is accompanied by an increasing need of having efficient early warning systems. Several years ago biosensor devices emerged as promising environmental monitoring tools, but their level of miniaturization and their fully operation outside the laboratory prevented their use on-site. In the last period, nanophotonic biosensors based on evanescent sensing have emerged as an outstanding choice for portable point-of-care diagnosis thanks to their capability, among others, of miniaturization, multiplexing, label-free detection and integration in lab-on-chip platforms. This review covers the most relevant nanophotonic biosensors which have been proposed (including interferometric waveguides, grating-couplers, microcavity resonators, photonic crystals and localized surface plasmon resonance sensors) and their recent application for environmental surveillance.
- Published
- 2017
36. Label-Free Biosensors Based on Bimodal Waveguide (BiMW) Interferometers
- Author
-
Laura M. Lechuga, Sonia Herranz, and Adrián Fernández Gavela
- Subjects
Waveguide (electromagnetism) ,Evanescent wave ,Fabrication ,Silicon ,Computer science ,chemistry.chemical_element ,02 engineering and technology ,021001 nanoscience & nanotechnology ,law.invention ,Interferometry ,020210 optoelectronics & photonics ,Transducer ,chemistry ,law ,0202 electrical engineering, electronic engineering, information engineering ,Astronomical interferometer ,Electronic engineering ,Sensitivity (control systems) ,0210 nano-technology ,Waveguide ,Biosensor - Abstract
The bimodal waveguide (BiMW) sensor is a novel common path interferometric transducer based on the evanescent field detection principle, which in combination with a bio-recognition element allows the direct detection of biomolecular interactions in a label-free scheme. Due to its inherent high sensitivity it has great potential to become a powerful analytical tool for monitoring substances of interest in areas such as environmental control, medical diagnostics and food safety, among others. The BiMW sensor is fabricated using standard silicon-based technology allowing cost-effective production, and meeting the requirements of portability and disposability necessary for implementation in a point-of-care (POC) setting.In this chapter we describe the design and fabrication of the BiMW transducer, as well as its application for bio-sensing purposes. We show as an example the biosensor capabilities two different applications: (1) the immunodetection of Irgarol 1051 biocide useful in the environmental field, and (2) the detection of human growth hormone as used in clinical diagnostics. The detection is performed in real time by monitoring changes in the intensity pattern of light exiting the BiMW transducer resulting from antigen-antibody interactions on the surface of the sensor.
- Published
- 2017
37. Electrochemical properties of spaghetti and forest like carbon nanotubes grown on glass substrates
- Author
-
M. Teresa Fernández-Abedul, Adrián Fernández-Gavela, Nuria Campos-Alfaraz, Agustín Costa-García, Isabel Álvarez-Martos, Jose Rodríguez-García, A. Belén García-Delgado, and David Gómez-Plaza
- Subjects
Detection limit ,Materials science ,Metals and Alloys ,Analytical chemistry ,Chemical vapor deposition ,Carbon nanotube ,Chronoamperometry ,Condensed Matter Physics ,Electrochemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,law ,Electrode ,Materials Chemistry ,Electrical and Electronic Engineering ,Cyclic voltammetry ,Instrumentation ,Deposition (law) - Abstract
Carbon nanotubes (CNTs) have been widely used in many fields of chemical analysis to achieve more sensitive detection systems. In this work, we performed fundamental studies on grown or bottom-up fabricated MWCNTs (both non-oriented and oriented configurations), showing how variables like orientation, density, underlayer deposition, or synthesis time strongly determine their behavior (physical, electrochemical and analytical) as transducers. The electrochemical performance of these surfaces was demonstrated by cyclic voltammetry and chronoamperometry of dopamine (DA) solutions in 0.1 M H2SO4. The carbon nanotubes surfaces pre-treated with 1 M HNO3 lead to increased signals, sensitivity and enhanced limits of detection (LOD). The grown working electrodes (WE) were reproducible and stable over the time. The peak variations gave RSD values of 8%, 4% and 3% for high-density spaghetti-like and ITO or Al underlayered forest-like MWCNTs grown for 30 min, respectively. This study highlighted the importance of controlling the synthesis variables to achieve better analytical parameters.
- Published
- 2014
38. Towards an integrated optofluidic system for highly sensitive detection of antibiotics in seawater incorporating bimodal waveguide photonic biosensors and complex, active microfluidics
- Author
-
Arnan Mitchell, J. Roccisano, Adrián Fernández Gavela, Laura M. Lechuga, Crispin Szydzik, and S. Herranz de Andrés
- Subjects
Materials science ,business.industry ,System of measurement ,Microfluidics ,Context (language use) ,Nanotechnology ,Lab-on-a-chip ,Automation ,law.invention ,law ,Photonics ,business ,Waveguide ,Biosensor - Abstract
We present recent results on the realisation and demonstration of an integrated optofluidic lab-on-a-chip measurement system. The system consists of an integrated on-chip automated microfluidic fluid handling subsystem, coupled with bimodal nano-interferometer waveguide technology, and is applied in the context of detection of antibiotics in seawater. The bimodal waveguide (BMWG) is a highly sensitive label-free biosensor. Integration of complex microfluidic systems with bimodal waveguide technology enables on-chip sample handling and fluid processing capabilities and allows for significant automation of experimental processes. The on-chip fluid-handling subsystem is realised through the integration of pneumatically actuated elastomer pumps and valves, enabling high temporal resolution sample and reagent delivery and facilitating multiplexed detection processes.
- Published
- 2016
39. Nanophotonic label-free biosensors for environmental monitoring
- Author
-
Chocarro Ruiz, Blanca, Fernández Gavela, Adrián, Herranz, Sonia, Lechuga, Laura M., Chocarro Ruiz, Blanca, Fernández Gavela, Adrián, Herranz, Sonia, and Lechuga, Laura M.
- Abstract
The field of environmental monitoring has experienced a substantial progress in the last years but still the on-site control of contaminants is an elusive problem. In addition, the growing number of pollutant sources is accompanied by an increasing need of having efficient early warning systems. Several years ago biosensor devices emerged as promising environmental monitoring tools, but their level of miniaturization and their fully operation outside the laboratory prevented their use on-site. In the last period, nanophotonic biosensors based on evanescent sensing have emerged as an outstanding choice for portable point-of-care diagnosis thanks to their capability, among others, of miniaturization, multiplexing, label-free detection and integration in lab-on-chip platforms. This review covers the most relevant nanophotonic biosensors which have been proposed (including interferometric waveguides, grating-couplers, microcavity resonators, photonic crystals and localized surface plasmon resonance sensors) and their recent application for environmental surveillance.
- Published
- 2017
40. Last advances in silicon-based optical biosensors
- Author
-
Daniel Grajales García, Adrián Fernández Gavela, Laura M. Lechuga, Jhonattan C. Ramirez, Ministério da Ciência, Tecnologia e Inovação (Brasil), Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Ministério da Educação (Brasil), Consejo Nacional de Ciencia y Tecnología (México), Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), and Consejo Superior de Investigaciones Científicas (España)
- Subjects
Engineering ,Waveguide devices ,Photonic biosensors ,Silicon photonics ,Nanotechnology ,02 engineering and technology ,Review ,lcsh:Chemical technology ,01 natural sciences ,Biochemistry ,Commercialization ,Analytical Chemistry ,010309 optics ,photonic biosensors ,label-free detection ,0103 physical sciences ,lcsh:TP1-1185 ,Electrical and Electronic Engineering ,Instrumentation ,silicon photonics ,business.industry ,waveguide devices ,021001 nanoscience & nanotechnology ,Atomic and Molecular Physics, and Optics ,Silicon based ,0210 nano-technology ,business ,Biosensor ,Label-free detection - Abstract
We review the most important achievements published in the last five years in the field of silicon-based optical biosensors. We focus specially on label-free optical biosensors and their implementation into lab-on-a-chip platforms, with an emphasis on developments demonstrating the capability of the devices for real bioanalytical applications. We report on novel transducers and materials, improvements of existing transducers, new and improved biofunctionalization procedures as well as the prospects for near future commercialization of these technologies., The nanoB2A is a consolidated research group (Grup de Recerca) of the Generalitat de Catalunya and has support from the Departament d’Universitats, Recerca i Societat de la Informació de la Generalitat de Catalunya (2014 SGR 624). ICN2 is the recipient of Grant SEV-2013-0295 from the “Severo Ochoa Centers of Excellence” Program of Spanish MINECO. Laura M. Lechuga acknowledges the Brazilian Program Science without Frontiers for International Cooperation—MEC/MCTI/CAPES/CNPq/FAPs, project No. 313690/2013-8. Daniel Grajales García acknowledges to the Mexican Council of Science and Technology (CONACYT) for the scholarship 218103-CVU 397275. Jhonattan C. Ramirez acknowledges to the National Counsel of Technological and Scientific Development (CNPq) Brazil., We acknowledge support by the CSIC Open Access Publication Initiative through its Unit of Information Resources for Research (URICI).
- Published
- 2016
41. Nanophotonic label-free biosensors for environmental monitoring
- Author
-
Chocarro-Ruiz, Blanca, primary, Fernández-Gavela, Adrián, additional, Herranz, Sonia, additional, and Lechuga, Laura M, additional
- Published
- 2017
- Full Text
- View/download PDF
42. Nanophotonic interferometric immunosensors for label-free and real-time monitoring of chemical contaminants in marine environment
- Author
-
Chocarro-Ruiz, B., additional, Herranz, S., additional, Fernández Gavela, A., additional, and Lechuga, L. M., additional
- Published
- 2017
- Full Text
- View/download PDF
43. Last advances in silicon-based optical biosensors
- Author
-
Ministério da Ciência, Tecnologia e Inovação (Brasil), Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Ministério da Educação (Brasil), Consejo Nacional de Ciencia y Tecnología (México), Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Consejo Superior de Investigaciones Científicas (España), Fernández Gavela, Adrián, Grajales García, Daniel, Ramírez, Jhonattan C., Lechuga, Laura M., Ministério da Ciência, Tecnologia e Inovação (Brasil), Ministerio de Economía y Competitividad (España), Generalitat de Catalunya, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), Ministério da Educação (Brasil), Consejo Nacional de Ciencia y Tecnología (México), Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil), Consejo Superior de Investigaciones Científicas (España), Fernández Gavela, Adrián, Grajales García, Daniel, Ramírez, Jhonattan C., and Lechuga, Laura M.
- Abstract
We review the most important achievements published in the last five years in the field of silicon-based optical biosensors. We focus specially on label-free optical biosensors and their implementation into lab-on-a-chip platforms, with an emphasis on developments demonstrating the capability of the devices for real bioanalytical applications. We report on novel transducers and materials, improvements of existing transducers, new and improved biofunctionalization procedures as well as the prospects for near future commercialization of these technologies.
- Published
- 2016
44. Desarrollo y optimización de técnicas de micrograbado para su aplicación en óptica integrada y en microfluidica bioanalítica
- Author
-
Fernández Gavela, Adrián, Rodríguez García, José, García Granda, Miguel, and Ciencia de los Materiales e Ingeniería Metalúrgica, Departamento de
- Subjects
Optica ,Luz ,Propiedades ópticas de los materiales ,Bioóptica - Abstract
La investigación llevada a cabo durante la realización de esta tesis doctoral tiene su origen en la colaboración científica que se inició en 2004 entre los Laboratorio de Óptica Integrada (LOI) y de Inmunoelectroanalisis (LI).El LOI y el LI pertenecen a los departamentos de Física Aplicada y de Física y Química Analítica de la Universidad de Oviedo, respectivamente. Esta colaboración comenzó cuando el LI sugirió fabricación de microcanales grabados en sustratos vítreos, utilizando el sistema de litografía láser, para su aplicación en microchips de electroforesis capilar (MEC). La calidad de estos microcanales juega un papel esencial en la eficiencia de los biosensores basados en MEC. Esta colaboración se extendió posteriormente a otros aspectos del desarrollo y optimización de los MECs. Además, también permitió al LOI adquirir conocimientos y experiencia en el mundo de los biosensores ópticos, que requieren la combinación de tres disciplinas diferentes: óptica integrada, microfluídica y sistemas electroquímicos. El trabajo científico presentado en esta tesis ha perseguido el objetivo principal de establecer y desarrollar nuevos protocolos y procedimientos orientados al diseño, fabricación y optimización de técnicas de micrograbado para su aplicación en óptica integrada y en microfluídica analítica. A lo largo de la investigación, este objetivo principal a dado lugar a los siguientes objetivos específicos: a) Determinación del índice de refracción y el espesor de microcapas poliméricas. b)Fabricación de microcanales en el polímero PDMS. c)Diseño y fabricación de nuevas guías ópticas canal poliméricos embebidas en vidrio (GOCPEV). Propuesta de un biosensor óptico por interferometría MachW Zehnder (IMZ) fabricado con este tipo de guías ópticas y con la incorporación de microcanales poliméricos. d) Fabricación de microelectrodos de carbono para detección electroquímica para su aplicación en MEC.
- Published
- 2014
45. Last Advances in Silicon-Based Optical Biosensors
- Author
-
Fernández Gavela, Adrián, primary, Grajales García, Daniel, additional, Ramirez, Jhonattan, additional, and Lechuga, Laura, additional
- Published
- 2016
- Full Text
- View/download PDF
46. Errata: Manufacture of carbon microelectrodes by laser lithography for electrochemical detection (Journal of Micro/ Nanolithography, MEMS, and MOEMS (2011) 10 (043013))
- Author
-
Antuña Presa, Silvino José, Fernández Gavela, Adrián, García Granda, Miguel, Rodríguez Lastra, María, and Rodríguez García, José
- Published
- 2012
47. P2.4.22 Forest and Disordered Carbon Nanotubes: Sensitivity Improvement of Electrochemical Detection in Miniaturized Devices
- Author
-
M.T. Fernández-Abedul, Rebeca Alonso-Bartolomé, Adrián Fernández-Gavela, N. Campos-Alfaraz, D. Gómez-Plaza, Isabel Álvarez-Martos, A. B. García-Delgado, Jose Rodríguez-García, and Agustín Costa-García
- Subjects
Materials science ,law ,Electrode ,Miniaturization ,Nanotechnology ,Carbon nanotube ,Electrochemical detection ,Sensitivity (control systems) ,Instrumentation (computer programming) ,Amperometry ,law.invention ,Nanomaterials - Abstract
Miniaturization is a well-established trend in the development of analytical devices, due to the important advantages it offers. Detection for this type of devices has to be in accordance and therefore easy integration and the employment of simple instrumentation are common requirements. These are fulfilled very well by the electrochemical detection (ED) and therefore, it is gaining relevance in many of the applications where miniaturized approaches are required. However, the use of very small sample volumes (i.e. in the case of microchip electrophoresis, ME) implies the use of very sensitive techniques. Even when this is the case of amperometry, sensitivity improvement is still needed. With this aim, nanotechnological approaches can be envisaged. Carbon nanotubes (CNTs) are one of the nanostructures that, from their discovery, remain generating relevant applications due to the possibilities and advantages they offer. Due to their conductive properties, they have been widely used as electrode modifiers. In this work, CNTs are directly grown on a glass surface and evaluated for electroanalytical purposes. However, simply by varying the procedure slightly, materials with very different properties can be obtained. For example, different configurations, vertically and non-vertically aligned CNTs, provide different analytical characteristics. Therefore, a careful choice of the nanomaterial has to be made in order to obtain the best performance of the devices.
- Published
- 2012
48. Fabrication and characterization of optical waveguides with a UV-curable epoxi
- Author
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Fernández Gavela, Adrián and Rodríguez García, José
- Abstract
Este trabajo ha sido realizado bajo la ayuda de los proyectos TEC2008-06844-CO2-01 del MEC, IB09-011C1 y una beca predoctoral “Severo Ochoa” de la FICYT.
- Published
- 2009
49. Electrochemical properties of spaghetti and forest like carbon nanotubes grown on glass substrates
- Author
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Álvarez-Martos, Isabel, primary, Fernández-Gavela, Adrián, additional, Rodríguez-García, Jose, additional, Campos-Alfaraz, Nuria, additional, García-Delgado, A. Belén, additional, Gómez-Plaza, David, additional, Costa-García, Agustín, additional, and Fernández-Abedul, M. Teresa, additional
- Published
- 2014
- Full Text
- View/download PDF
50. P2.4.22 Forest and Disordered Carbon Nanotubes: Sensitivity Improvement of Electrochemical Detection in Miniaturized Devices
- Author
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Álvarez-Martos, I., primary, Alonso-Bartolomé, R., additional, Costa-García, A., additional, Fernández-Abedul, M. T., additional, Fernández-Gavela, A., additional, Rodríguez-García, J., additional, Campos-Alfaraz, N., additional, García-Delgado, A. B., additional, and Gómez-Plaza, D., additional
- Published
- 2012
- Full Text
- View/download PDF
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