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537 results on '"Pérez-Juste, Jorge"'

5. Exciting Surface Plasmon Resonances on Gold Thin Film‐Coated Optical Fibers Through Nanoparticle Light Scattering.

Author

Mendes, João P., dos Santos, Paulo S. S., Dias, Bernardo, Núñez‐Sánchez, Sara, Pastoriza‐Santos, I., Pérez‐Juste, Jorge, Pereira, Carlos M., Jorge, Pedro A. S., de Almeida, José M. M. M., and Coelho, Luís C. C.

Subjects
METALLIC thin films, SURFACE plasmon resonance, NANOPARTICLES, LIGHT scattering, DIELECTRIC films, GOLD nanoparticles, FIBER optics, OPTICAL fibers, RAMAN scattering
Abstract

Surface plasmon resonance (SPR) conventionally occurs at the interface of a thin metallic film and an external dielectric medium in fiber optics through core‐guided light. However, this work introduces theoretical and experimental evidence suggesting that the SPR in optical fibers can also be induced through light scattering from Au nanoparticles (NPs) on the thin metallic film, defined as nanoparticle‐induced SPR (NPI‐SPR). This method adheres to phase‐matching conditions between SPR dispersion curves and the wave vectors of scattered light from Au NPs. Experimentally, these conditions are met on an etched optical fiber, enabling direct interaction between light and immobilized Au NPs. Compared to SPR, NPI‐SPR exhibits stronger field intensity in the external region and wavelength tuning capabilities (750 to 1250 nm) by varying Au NP diameters (20 to 90 nm). NPI‐SPR demonstrates refractive index sensitivities of 4000 to 4416 nm per refractive index unit, nearly double those of typical SPR using the same optical fiber configuration sans Au NPs. Additionally, NPI‐SPR fiber configuration has demonstrated its applicability for developing biosensors, achieving a remarkable limit of detection of 0.004 nm for thrombin protein evaluation, a twenty‐fold enhancement compared to typical SPR. These findings underscore the intrinsic advantages of NPI‐SPR for sensing. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Plasmonic Nanocages

Author

Fernández-Lodeiro, Carlos, primary, Pérez-Juste, Jorge, additional, and Pastoriza-Santos, Isabel, additional

Published
2022
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7. Differentiating Plasmon-Enhanced Chemical Reactions on AgPd Hollow Nanoplates through Surface-Enhanced Raman Spectroscopy

Author

Jiao, Sulin, primary, Dai, Kun, additional, Besteiro, Lucas V., additional, Gao, Hongen, additional, Chen, Xuan, additional, Wang, Weichao, additional, Zhang, Yuan, additional, Liu, Chuntai, additional, Pérez-Juste, Ignacio, additional, Pérez-Juste, Jorge, additional, Pastoriza-Santos, Isabel, additional, and Zheng, Guangchao, additional

Published
2024
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10. Au@Ag Core–Shell Nanoparticles for Colorimetric and Surface-Enhanced Raman-Scattering-Based Multiplex Competitive Lateral Flow Immunoassay for the Simultaneous Detection of Histamine and Parvalbumin in Fish

Author

Fernández-Lodeiro, Carlos, primary, González-Cabaleiro, Lara, additional, Vázquez-Iglesias, Lorena, additional, Serrano-Pertierra, Esther, additional, Bodelón, Gustavo, additional, Carrera, Mónica, additional, Blanco-López, María Carmen, additional, Pérez-Juste, Jorge, additional, and Pastoriza-Santos, Isabel, additional

Published
2023
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25. Au@Ag Core–Shell Nanoparticles for Colorimetric and Surface-Enhanced Raman-Scattering-Based Multiplex Competitive Lateral Flow Immunoassay for the Simultaneous Detection of Histamine and Parvalbumin in Fish.

Author

Fernández-Lodeiro, Carlos, González-Cabaleiro, Lara, Vázquez-Iglesias, Lorena, Serrano-Pertierra, Esther, Bodelón, Gustavo, Carrera, Mónica, Blanco-López, María Carmen, Pérez-Juste, Jorge, and Pastoriza-Santos, Isabel

Abstract

Foodborne allergies and illnesses represent a major global health concern. In particular, fish can trigger life-threatening food allergic reactions and poisoning effects, mainly caused by the ingestion of parvalbumin toxin. Additionally, preformed histamine in less-than-fresh fish serves as a toxicological alert. Consequently, the analytical assessment of parvalbumin and histamine levels in fish becomes a critical public health safety measure. The multiplex detection of both analytes has emerged as an important issue. The analytical detection of parvalbumin and histamine requires different assays; while the determination of parvalbumin is commonly carried out by enzyme-linked immunosorbent assay, histamine is analyzed by high-performance liquid chromatography. In this study, we present an approach for multiplexing detection and quantification of trace amounts of parvalbumin and histamine in canned fish. This is achieved through a colorimetric and surface-enhanced Raman-scattering-based competitive lateral flow assay (SERS-LFIA) employing plasmonic nanoparticles. Two distinct SERS nanotags tailored for histamine or β-parvalbumin detection were synthesized. Initially, spherical 50 nm Au@Ag core–shell nanoparticles (Au@Ag NPs) were encoded with either rhodamine B isothiocyanate (RBITC) or malachite green isothiocyanate (MGITC). Subsequently, these nanoparticles were bioconjugated with anti-β-parvalbumin and antihistamine, forming the basis for our detection and quantification methodology. Additionally, our approach demonstrates the use of SERS-LFIA for the sensitive and multiplexed detection of parvalbumin and histamine on a single test line, paving the way for on-site detection employing portable Raman instruments. [ABSTRACT FROM AUTHOR]

Published
2024
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31. Synthesis of tuneable gold nanostars: the role of adenosine monophosphate.

Author

Fernández-Lodeiro, Carlos, Fernández-Lodeiro, Javier, Fernández-Lodeiro, Adrián, Nuti, Silvia, Lodeiro, Carlos, LaGrow, Alec, Pérez-Juste, Ignacio, Pérez-Juste, Jorge, and Pastoriza-Santos, Isabel

Abstract

The seed-mediated growth of gold nanostructures is known to be strongly dependent not only on the gold seed nanocrystal structure but also on the presence of different additives that may influence the morphology, and therefore the crystalline structure of the final nanoparticle. Among the different additives or capping ligands, biomolecules are an interesting family due to their potential biomedical applications such as drug delivery, bioimaging, biosensing, phototherapy, and antimicrobial activities. Here, we develop a seed-mediated strategy for synthesizing uniform Au nanostars with tuneable optical properties which involves adenosine monophosphate (AMP) as a capping ligand. The experimental data reveal the key role of AMP not just providing colloidal stability and directing the reduction of the gold precursor via complexation but also mediating the anisotropic growth of the Au seeds via its selective adsorption on the different crystalline facets of Au nanoparticles. These observations agree with theoretical simulations carried out using molecular dynamics and density functional theory (DFT) calculations. Interestingly, the obtained Au nanostars showed high thermal stability as well as colloidal stability in polar organic solvents, which allowed their direct silica coating via the Stöber method. Importantly, we also explored the mimic enzymatic activity of the resulting gold nanostars and observed a superior catalytic activity compared with other gold nanoparticles reported in the literature. [ABSTRACT FROM AUTHOR]

Published
2023
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32. Chiral Seeded Growth of Gold Nanorods Into Fourfold Twisted Nanoparticles with Plasmonic Optical Activity (Adv. Mater. 1/2023)

Author

Ni, Bing, primary, Mychinko, Mikhail, additional, Gómez‐Graña, Sergio, additional, Morales‐Vidal, Jordi, additional, Obelleiro‐Liz, Manuel, additional, Heyvaert, Wouter, additional, Vila‐Liarte, David, additional, Zhuo, Xiaolu, additional, Albrecht, Wiebke, additional, Zheng, Guangchao, additional, González‐Rubio, Guillermo, additional, Taboada, José M., additional, Obelleiro, Fernando, additional, López, Núria, additional, Pérez‐Juste, Jorge, additional, Pastoriza‐Santos, Isabel, additional, Cölfen, Helmut, additional, Bals, Sara, additional, and Liz‐Marzán, Luis M., additional

Published
2023
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33. Chiral Seeded Growth of Gold Nanorods Into Fourfold Twisted Nanoparticles with Plasmonic Optical Activity

Author

Ni, Bing, primary, Mychinko, Mikhail, additional, Gómez‐Graña, Sergio, additional, Morales‐Vidal, Jordi, additional, Obelleiro‐Liz, Manuel, additional, Heyvaert, Wouter, additional, Vila‐Liarte, David, additional, Zhuo, Xiaolu, additional, Albrecht, Wiebke, additional, Zheng, Guangchao, additional, González‐Rubio, Guillermo, additional, Taboada, José M., additional, Obelleiro, Fernando, additional, López, Núria, additional, Pérez‐Juste, Jorge, additional, Pastoriza‐Santos, Isabel, additional, Cölfen, Helmut, additional, Bals, Sara, additional, and Liz‐Marzán, Luis M., additional

Published
2022
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34. Plasmonic metal‐organic frameworks

Author

Zheng, Guangchao, Pastoriza‐Santos, Isabel, Pérez‐Juste, Jorge, and Liz‐Marzán, Luis M.

Subjects
Nanocomposite, Materials science, catalysis, plasmonic MOFs, Nanotechnology, Catalysis, metal‐organic frameworks, Drug delivery, drug delivery, nanocomposites, TA401-492, Metal-organic framework, plasmonic metal nanoparticles, Materials of engineering and construction. Mechanics of materials, Plasmon
Abstract

Plasmonic metal‐organic frameworks are composite nanoparticles comprising plasmonic metal nanoparticles (NPs) embedded within a metal‐organic framework (MOF) matrix. As a result, not only the functionalities of the individual components are retained, but synergistic effects additionally provide improved chemical and physical properties. Recent progress in plasmonic MOFs has demonstrated the potential for nanofabrication and various nanotechnology applications. Synthetic challenges toward plasmonic MOFs have been recently addressed, resulting in new opportunities toward practical applications, such as surface‐enhanced Raman scattering, therapy, and catalysis. The impact of key parameters (thermodynamic vs. kinetic) on the synthetic pathways of plasmonic MOFs is reviewed, while providing insight into related progress toward structure‐derived applications.

Published
2021

36. Chiral Seeded Growth of Gold Nanorods Into Fourfold Twisted Nanoparticles with Plasmonic Optical Activity.

Author

Ni, Bing, Mychinko, Mikhail, Gómez‐Graña, Sergio, Morales‐Vidal, Jordi, Obelleiro‐Liz, Manuel, Heyvaert, Wouter, Vila‐Liarte, David, Zhuo, Xiaolu, Albrecht, Wiebke, Zheng, Guangchao, González‐Rubio, Guillermo, Taboada, José M., Obelleiro, Fernando, López, Núria, Pérez‐Juste, Jorge, Pastoriza‐Santos, Isabel, Cölfen, Helmut, Bals, Sara, and Liz‐Marzán, Luis M.

Published
2024
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39. Fast A‐Site Cation Cross‐Exchange at Room Temperature: Single‐to Double‐ and Triple‐Cation Halide Perovskite Nanocrystals

Author

Otero‐Martínez, Clara, primary, Imran, Muhammad, additional, Schrenker, Nadine J., additional, Ye, Junzhi, additional, Ji, Kangyu, additional, Rao, Akshay, additional, Stranks, Samuel D., additional, Hoye, Robert L. Z., additional, Bals, Sara, additional, Manna, Liberato, additional, Pérez‐Juste, Jorge, additional, and Polavarapu, Lakshminarayana, additional

Published
2022
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42. Colloidal Metal-Halide Perovskite Nanoplatelets: Thickness-Controlled Synthesis, Properties, and Application in Light-Emitting Diodes

Author

Otero-Martínez, Clara, Ye, Junzhi, Sung, Jooyoung, Pastoriza-Santos, Isabel, Pérez-Juste, Jorge, Xia, Zhiguo, Rao, Akshay, Hoye, Robert LZ, Polavarapu, Lakshminarayana, Polavarapu, Lakshminarayana [0000-0002-0338-2898], and Apollo - University of Cambridge Repository

Subjects
perovskite nanocrystals, perovskite nanoplatelets, light-emitting devices, 2D perovskites, perovskite nanosheets, quantum confinement
Abstract

Colloidal metal-halide perovskite nanocrystals (MHP NCs) are gaining significant attention for a wide range of optoelectronics applications owing to their exciting properties, such as defect tolerance, near-unity photoluminescence quantum yield, and tunable emission across the entire visible wavelength range. Although the optical properties of MHP NCs are easily tunable through their halide composition, they suffer from light-induced halide phase segregation that limits their use in devices. However, MHPs can be synthesized in the form of colloidal nanoplatelets (NPls) with monolayer (ML)-level thickness control, exhibiting strong quantum confinement effects, and thus enabling tunable emission across the entire visible wavelength range by controlling the thickness of bromide or iodide-based lead-halide perovskite NPls. In addition, the NPls exhibit narrow emission peaks, have high exciton binding energies, and a higher fraction of radiative recombination compared to their bulk counterparts, making them ideal candidates for applications in light-emitting diodes (LEDs). This review discusses the state-of-the-art in colloidal MHP NPls: synthetic routes, thickness-controlled synthesis of both organic-inorganic hybrid and all-inorganic MHP NPls, their linear and nonlinear optical properties (including charge-carrier dynamics), and their performance in LEDs. Furthermore, the challenges associated with their thickness-controlled synthesis, environmental and thermal stability, and their application in making efficient LEDs are discussed.

Published
2022
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43. Supporting Information for Hydrophobic gold nanoparticles with intrinsic chirality for the efficient fabrication of chiral plasmonic nanocomposites

Author

Kowalska, Natalia, Bandalewicz, Filip, Kowalski, Jakub, Gómez-Graña, Sergio, Bagiński, Maciej, Pastoriza-Santos, Isabel, Grzelczak, Marek, Matraszek, Joanna, Pérez‐Juste, Jorge, Lewandowski, Wiktor, Kowalska, Natalia, Bandalewicz, Filip, Kowalski, Jakub, Gómez-Graña, Sergio, Bagiński, Maciej, Pastoriza-Santos, Isabel, Grzelczak, Marek, Matraszek, Joanna, Pérez‐Juste, Jorge, and Lewandowski, Wiktor

Published
2022

44. Hydrophobic gold nanoparticles with intrinsic chirality for the efficient fabrication of chiral plasmonic nanocomposites

Author

National Science Centre (Poland), Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Xunta de Galicia, Kowalska, Natalia, Bandalewicz, Filip, Kowalski, Jakub, Gómez-Graña, Sergio, Bagiński, Maciej, Pastoriza-Santos, Isabel, Grzelczak, Marek, Matraszek, Joanna, Pérez‐Juste, Jorge, Lewandowski, Wiktor, National Science Centre (Poland), Agencia Estatal de Investigación (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Xunta de Galicia, Kowalska, Natalia, Bandalewicz, Filip, Kowalski, Jakub, Gómez-Graña, Sergio, Bagiński, Maciej, Pastoriza-Santos, Isabel, Grzelczak, Marek, Matraszek, Joanna, Pérez‐Juste, Jorge, and Lewandowski, Wiktor

Abstract

The development of plasmonic nanomaterials with chiral geometry has drawn extensive attention owing to their practical implications in chiral catalysis, chiral metamaterials, or enantioselective biosensing and medicine. However, due to the lack of effective synthesis methods of hydrophobic nanoparticles (NPs) showing intrinsic, plasmonic chirality, their applications are currently limited to aqueous systems. In this work, we resolve the problem of achieving hydrophobic Au NPs with intrinsic chirality by efficient phase transfer of water-soluble NPs using low molecular weight, liquid crystal-like ligands. We confirmed that, after the phase transfer, Au NPs preserve strong, far-field circular dichroism (CD) signals, attesting their chiral geometry. The universality of the method is exemplified by using different types of NPs and ligands. We further highlight the potential of the proposed approach to realize chiral plasmonic, inorganic/organic nanocomposites with block copolymers, liquid crystals, and compounds forming physical gels. All soft matter composites sustain plasmonic CD signals with electron microscopies confirming well-dispersed nanoinclusions. The developed methodology allows us to expand the portfolio of plasmonic NPs with intrinsic structural chirality, thereby broadening the scope of their applications toward soft-matter based systems.

Published
2022

45. Methodological Approaches for Monitoring Five Major Food Safety Hazards Affecting Food Production in the Galicia–Northern Portugal Euroregion

Author

Interreg, Fundação para a Ciência e a Tecnologia (Portugal), Rodríguez Herrera, Juan José, Cabado, Ana G., Bodelón, Gustavo, Cunha, Sara C., Pinto, Vânia, Fernandes, José O., Lago, Jorge, Muñoz Santiago, Silvia, Pastoriza-Santos, Isabel, Sousa, Paulo, Gonçalves, Luis, López Cabo, Marta, Pérez-Juste, Jorge, Santos, Joao, Minas, Graça, Interreg, Fundação para a Ciência e a Tecnologia (Portugal), Rodríguez Herrera, Juan José, Cabado, Ana G., Bodelón, Gustavo, Cunha, Sara C., Pinto, Vânia, Fernandes, José O., Lago, Jorge, Muñoz Santiago, Silvia, Pastoriza-Santos, Isabel, Sousa, Paulo, Gonçalves, Luis, López Cabo, Marta, Pérez-Juste, Jorge, Santos, Joao, and Minas, Graça

Abstract

The agri-food industry has historically determined the socioeconomic characteristics of Galicia and Northern Portugal, and it was recently identified as an area for collaboration in the Euroregion. In particular, there is a need for action to help to ensure the provision of safe and healthy foods by taking advantage of key enabling technologies. The goals of the FOODSENS project are aligned with this major objective, specifically with the development of biosensors able to monitor hazards relevant to the safety of food produced in the Euroregion. The present review addresses the state of the art of analytical methodologies and techniques—whether commercially available or in various stages of development—for monitoring food hazards, such as harmful algal blooms, mycotoxins, Listeria monocytogenes, allergens, and polycyclic aromatic hydrocarbons. We discuss the pros and cons of these methodologies and techniques and address lines of research for point-of-care detection. Accordingly, the development of miniaturized automated monitoring strategies is considered a priority in terms of health and economic interest, with a significant impact in several areas, such as food safety, water quality, pollution control, and public health. Finally, we present potential market opportunities that could result from the availability of rapid and reliable commercial methodologies

Published
2022

50. Methodological Approaches for Monitoring Five Major Food Safety Hazards Affecting Food Production in the Galicia–Northern Portugal Euroregion

Author

Rodríguez-Herrera, Juan, primary, Cabado, Ana G., additional, Bodelón, Gustavo, additional, Cunha, Sara C., additional, Pinto, Vânia, additional, Fernandes, José O., additional, Lago, Jorge, additional, Muñoz, Silvia, additional, Pastoriza-Santos, Isabel, additional, Sousa, Paulo, additional, Gonçalves, Luís, additional, López-Cabo, Marta, additional, Pérez-Juste, Jorge, additional, Santos, João, additional, and Minas, Graça, additional

Published
2021
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