Search

Your search keyword '"Ahuja, Tripti"' showing total 96 results
Start Over Author "Ahuja, Tripti"
96 results on '"Ahuja, Tripti"'

5. Raman spectroscopy and its plasmon‐enhanced counterparts: A toolbox to probe protein dynamics and aggregation.

Author

Dhillon, Ashish Kumar, Sharma, Arti, Yadav, Vikas, Singh, Ruchi, Ahuja, Tripti, Barman, Sanmitra, and Siddhanta, Soumik

Abstract

Protein unfolding and aggregation are often correlated with numerous diseases such as Alzheimer's, Parkinson's, Huntington's, and other debilitating neurological disorders. Such adverse events consist of a plethora of competing mechanisms, particularly interactions that control the stability and cooperativity of the process. However, it remains challenging to probe the molecular mechanism of protein dynamics such as aggregation, and monitor them in real‐time under physiological conditions. Recently, Raman spectroscopy and its plasmon‐enhanced counterparts, such as surface‐enhanced Raman spectroscopy (SERS) and tip‐enhanced Raman spectroscopy (TERS), have emerged as sensitive analytical tools that have the potential to perform molecular studies of functional groups and are showing significant promise in probing events related to protein aggregation. We summarize the fundamental working principles of Raman, SERS, and TERS as nondestructive, easy‐to‐perform, and fast tools for probing protein dynamics and aggregation. Finally, we highlight the utility of these techniques for the analysis of vibrational spectra of aggregation of proteins from various sources such as tissues, pathogens, food, biopharmaceuticals, and lastly, biological fouling to retrieve precise chemical information, which can be potentially translated to practical applications and point‐of‐care (PoC) devices. This article is categorized under:Therapeutic Approaches and Drug Discovery > Emerging TechnologiesDiagnostic Tools > Diagnostic NanodevicesNanotechnology Approaches to Biology > Nanoscale Systems in Biology [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

6. Photoactivated plasmonic nanohybrid fibers with prolonged trapping of excited charge carriers for SERS analysis of biomolecules.

Author

Sharma, Arti, Ahuja, Tripti, Yadav, Jatin, Majumdar, Shubhangi, and Siddhanta, Soumik

Abstract

The quest to enhance Raman spectroscopic signals through the rational design of plasmonic substrates has enabled the detection and characterization of pharmaceutically important molecules with low scattering cross-sections, such as amino acids and proteins, and is helping in making forays into the diverse field of biomedical sciences. This work presents a simple strategy for synthesizing silver nanoparticles-incorporated alumina nanofibers (Ag–AlNFs) utilizing controlled microwave synthesis for enhancing the surface-enhanced Raman chemical enhancement factor through photo-induced charge accumulation at the plasmonic–dielectric interface. The plasmonic–dielectric fibers serve as excellent charge carrier trappers, as evident from the ultrafast transient absorption spectroscopy studies. Apart from chemical enhancement, the increase in electronic surface charge also enables the protein disulfide bonds to capture these electrons and form a transient disulfide electron adduct radical, which converts to free thiol radical on dissociation. This allows protein molecules to bind to the nanoparticle's surface with the favorable silver thiol bond leading to greater surface affinity and larger SERS enhancement. The proposed Ag–AlNFs represent a cost-effective material that can be potentially used to probe biological systems in a label-free manner by photoactivating the SERS substrate for obtaining higher enhancement factors. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

12. Selective and Practical Graphene-Based Arsenite Sensor at 10 ppb

Author

Jana, Sourav Kanti, primary, Chaudhari, Kamalesh, additional, Islam, Md Rabiul, additional, Natarajan, Ganapati, additional, Ahuja, Tripti, additional, Som, Anirban, additional, Paramasivam, Ganesan, additional, Raghavendra, Addanki, additional, Sudhakar, Chennu, additional, and Pradeep, Thalappil, additional

Published
2022
Full Text
View/download PDF

23. Contributors

Author

Abbasi-Moayed, Samira, Ahuja, Tripti, Andhariya, Nidhi, Balamurugan, R., Bhardwaj, Geetika, Bose, A. Chandra, Buzea, Cristina, Chudasama, Bhupendra Kumar, Dias, Daiane, Dutta, Subrata, Fahimi-Kashani, Nafiseh, Ghamsari, Mahdi, Ghasemi, Forough, Gupta, Rachna, Haque, Shagufta, Harikrishnan, M.P., Heinemann, Mônika Grazielle, Hormozi-Nezhad, M. Reza, Inwati, Gajendra Kumar, Ivrigh, Zahra Jafar-Nezhad, Jangir, Ritambhara, Joshi, Raj Kumar, Kaur, Navneet, Londhe, Swapnali, Malik, Parth, Maneet, Mukherjee, Tapan Kumar, Nakum, Rajanee, Orouji, Afsaneh, Pacheco, Ivan, Patra, Chitta Ranjan, Prakash, Jai, Ruas, Caroline Pires, Sahoo, Suban K., Samriti, Shalini, S. Siva, Singh, Narinder, Vala, Anjana K., and Velmathi, S.

Published
2023
Full Text
View/download PDF

26. Enhanced Capture of Particulate Matter by Molecularly Charged Electrospun Nanofibers

Author

Srikrishnarka, Pillalamarri, primary, Kumar, Vishal, additional, Ahuja, Tripti, additional, Subramanian, Vidhya, additional, Selvam, Arun Karthick, additional, Bose, Paulami, additional, Jenifer, Shantha Kumar, additional, Mahendranath, Ananthu, additional, Ganayee, Mohd Azhardin, additional, Nagarajan, Ramamurthy, additional, and Pradeep, Thalappil, additional

Published
2020
Full Text
View/download PDF

29. Chemical Composition, Antioxidant and Antimicrobial Potential of the Essential Oils from Aerial Parts of Tagetes patulaL. at Different Phenological Stages

Author

Kafaltiya, Meena, Lohani, Hema, Bhandari, Ujjwal, Zafar Haider, S., Chauhan, Nirpendra, Ahuja, Tripti Malik, Pant, Shailja, and Joshi, Neeta

Abstract

AbstractThe current study aims at determining the variability in composition, antibacterial and antioxidant properties of the essential oils extracted from aerial parts of Tagetes patulaat different phenological stages of plant growth i.e., the vegetative, full blooming and seed setting stages. The maximum average yield of hydrodistilled essential oils was obtained as 0.083 ± 0.003% (seed setting), 0.068±0.007% (full flowering) and 0.059±0.005% (pre flowering). (Z)-β-ocimene was found to be most abundant compound of essential oil of T. patula, and α-terpinolene, piperitenone, limonene and propanedinitrile, dicyclohexyl were found as major compounds in oil extracted at different phenological stages of plant. Contribution of (Z)-β-Ocimene was highest in full flowering stage (18.27±3.14%) as compared to other two stages where its amount ranged from 12.03-17.17 %. α-Terpinolene the second major component was found highest in the pre-flowering stage (13.86±1.15%) compared to other stages. Significant variation was observed in the percent content of piperitenone during all three phenological stages The antioxidant (DPPH radical scavenging) assay showed that T. patulaoils have maximum activity at the pre-flowering stage. Antibacterial activities of the essential oils were observed at the pre-flowering stage against different bacteria; i.e., Bacillussp., Escherichia coli, Listeria monocytogenes, Pseudomonas aeruginosa, Staphylococcus aureusand exhibited promising values of MIC (0.125 % v/v -0.5 % v/v) and MBC (0.25 v/v to 1% v/v) against bacterial cultures.

Published
2022
Full Text
View/download PDF

48. Highly Sensitive As3+Detection Using Electrodeposited Nanostructured MnOxand Phase Evolution of the Active Material during Sensing

Author

Gupte, Tanvi, Jana, Sourav Kanti, Mohanty, Jyoti Sarita, Srikrishnarka, Pillalamarri, Mukherjee, Sritama, Ahuja, Tripti, Sudhakar, Chennu, Thomas, Tiju, and Pradeep, Thalappil

Abstract

A simple, one-step electrodeposition approach has been used to fabricate MnOxon an indium-doped tin oxide substrate for highly sensitive As3+detection. We report an experimental limit of detection of 1 ppb through anodic stripping voltammetry with selectivity to As3+in the presence of 10 times higher concentrations of several metal ions. Additionally, we report the simultaneous phase evolution of active material occurring through multiple stripping cycles, wherein MnO/Mn2O3eventually converts to Mn3O4as a result of change in the oxidation states of manganese. This occurs with concomitant changes in morphology. Change in the electronic property (increased charge transfer resistance) of the material due to sensing results in an eventual decrease in sensitivity after multiple stripping cycles. In a nutshell, this paper reports stripping-voltammetry-induced change in morphology and phase of as-prepared Mn-based electrodes during As sensing.

Published
2019
Full Text
View/download PDF

49. Confining an Ag10Core in an Ag12Shell: A Four-Electron Superatom with Enhanced Photoluminescence upon Crystallization

Author

Khatun, Esma, Bodiuzzaman, Mohammad, Sugi, Korath Shivan, Chakraborty, Papri, Paramasivam, Ganesan, Dar, Wakeel Ahmed, Ahuja, Tripti, Antharjanam, Sudhadevi, and Pradeep, Thalappil

Abstract

We introduce a cluster coprotected by thiol and diphosphine ligands, [Ag22(dppe)4(2,5-DMBT)12Cl4]2+(dppe = 1,2-bis(diphenylphosphino)ethane; 2,5-DMBT= 2,5-dimethylbenzenethiol), which has an Ag10core encapsulated by an Ag12(dppe)4(2,5-DMBT)12Cl4shell. The Ag10core comprises two Ag5distorted trigonal bipyramidal units and is uncommon in Au and Ag nanoclusters. The electrospray ionization mass spectrum reveals that the cluster is divalent and contains four free electrons. An uncommon crystallization-induced enhancement of emission is observed in the cluster. The emission is weak in the solution and amorphous states. However, it is enhanced 12 times in the crystalline state compared to the amorphous state. A detailed investigation of the crystal structure suggests that well-arranged C–H···π and π···π interactions between the ligands are the major factors for this enhanced emission. Further, in-depth structural elucidation and density functional theory calculations suggest that the cluster is a superatom with four magic electrons.

Published
2019
Full Text
View/download PDF

50. Superhydrophobic Surfaces: Waterborne Fluorine‐Free Superhydrophobic Surfaces Exhibiting Simultaneous CO2 and Humidity Sorption (Adv. Mater. Interfaces 23/2019).

Author

Baidya, Avijit, Yatheendran, Anagha, Ahuja, Tripti, Sudhakar, Chennu, Das, Sarit Kumar, Ras, Robin H. A., and Pradeep, Thalappil

Subjects
SUPERHYDROPHOBIC surfaces, SORPTION, HUMIDITY, HYDROPHOBIC surfaces
Abstract

Keywords: environment-friendly; moisture sorption and CO2 capture; robust; superhydrophobicity; waterborne Moisture sorption and CO2 capture Environment-friendly, moisture sorption and CO2 capture, robust, superhydrophobicity, waterborne. [Extracted from the article]

Published
2019
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results