K. N. Prajapati

ORCID: 0000-0003-2566-3233
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About
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Research Areas
  • ZnO doping and properties
  • Copper-based nanomaterials and applications
  • Gold and Silver Nanoparticles Synthesis and Applications
  • Quantum Dots Synthesis And Properties
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Chalcogenide Semiconductor Thin Films
  • Chemical Synthesis and Analysis
  • Semiconductor materials and interfaces
  • Spectroscopy and Chemometric Analyses
  • Scientific Computing and Data Management
  • Conducting polymers and applications
  • Computational Drug Discovery Methods
  • Acoustic Wave Resonator Technologies
  • Receptor Mechanisms and Signaling
  • Biosensors and Analytical Detection
  • Advanced Memory and Neural Computing
  • Plasmonic and Surface Plasmon Research
  • Advanced Sensor and Energy Harvesting Materials
  • Statistical and Computational Modeling
  • Gas Sensing Nanomaterials and Sensors
  • Neuroscience and Neural Engineering
  • Artificial Intelligence in Healthcare
  • Laser-induced spectroscopy and plasma
  • CCD and CMOS Imaging Sensors
  • Advanced Thermoelectric Materials and Devices

University of Warsaw
2024-2025

Indian Institute of Science Education and Research Thiruvananthapuram
2018-2023

G protein-coupled receptors (GPCRs) constitute the largest and most frequently used family of molecular drug targets. The simplicity GPCR design results from their common seven-transmembrane-helix topology well-understood signaling pathways. GPCRs are extremely sensitive to slight changes in chemical structure compounds, which allows for reliable highly selective specific drugs. Only recently has number structures, both active inactive conformations, together with ligands, become sufficient...

10.3390/ijms26052160 article EN International Journal of Molecular Sciences 2025-02-27

This research looks into the implementation of reinforcement learning (RL) principles robotics with a particular interest in controlling autonomous systems. It examines various RL methods, such as Proximal Policy Optimization (PPO), and Deep Q-Networks (DQN), to improve robotic decision-making processes. Using information from Fiber Bragg Grating (FBG) sensors, we focus on real-time processing sensor data demonstrate greater levels efficiency flexibility within active settings. Quantitative...

10.63278/1449 article EN Metallurgical and Materials Engineering 2025-04-16

We report negative photoresponse or increase of resistance in nanocomposites n-type ZnO nanoparticles dispersed a p-type polymer (PEDOT:PSS) under UV and visible light excitation, contrary to that planar heterojunctions the constituents. The underlying mechanism charge transport, specifically photoresponse, is explored using spectroscopic opto-electrical characterisation. Systemic variability conductance, sensitivity rate with fractional nanoparticle loading nanocomposite demonstrated. Here,...

10.1039/c9na00116f article EN cc-by-nc Nanoscale Advances 2019-01-01

We model the enhancement of near band edge emission from ZnO nanorods using plasmonic metal nanoparticles and compare it with semiconducting quantum dots. Selected CdSe dots absorption energies close to those Ag Au are chosen construct systems comprehend role ZnO's intrinsic defects excitation in realizing spectrally selective luminescence enhancement. Excitation wavelength dependent photoluminescence spectra along theoretical models quantifying related transitions reveal that a complex...

10.1063/1.5138944 article EN The Journal of Chemical Physics 2020-02-10

Resistive switching in nanostructured metal oxide semiconductors has been broadly understood to originate from the dynamics of its native point defects. Experimental results observed individual n-ZnO nanorods grown on a p-type polymer is presented along with an empirical model describing underlying defect necessary observe bi-polar switching. Selective photo excitation electrons into states delineates incidence and role ionic current behavior. The understanding further extends observance...

10.1088/1361-6528/aaa63f article EN Nanotechnology 2018-01-09

Abstract ZnO is a widely studied gas sensor material and used in many commercial devices. However, selectivity towards any particular remains an issue due to lack of complete knowledge the sensing mechanism oxide surfaces. In this paper, we have frequency dependent response nanoparticles diameter nearly 30 nm. A small rise synthesis temperature from 85 °C 95 solvothermal process, shows coarsening by joining thereby distinct loss grain boundaries as seen transmission electron micrographs....

10.1088/1361-6528/acdca0 article EN Nanotechnology 2023-06-08

Modeling light-matter interactions in hybrid plasmonic materials is vital to their widening relevance from optoelectronics photocatalysis. Here, we explore photoluminescence (PL) ZnO nanorods (ZNRs) embedded with gold nanoparticles (Au NPs). A progressive increase Au NP concentration introduces significant structural disorder and defects ZNRs, which paradoxically quenches defect related visible PL while intensifying the near band edge (NBE) emission. Under UV excitation, simulated...

10.1063/5.0171078 article EN The Journal of Chemical Physics 2023-12-26

Summary: G protein-coupled receptors (GPCRs) constitute the largest and most frequently used family of molecular drug targets. The simplicity GPCR design results from their common seven-transmembrane helix topology well-understood signaling pathways. GPCRs are extremely sensitive to slight changes in chemical structure compounds, which allows for reliable highly selective specific drugs. Only recently has number structures, both active inactive conformations together with ligands, become...

10.1101/2024.10.28.620626 preprint EN cc-by-nc-nd bioRxiv (Cold Spring Harbor Laboratory) 2024-10-31

Abstract Surface enhanced Raman spectroscopy is today an established technique used for chemical fingerprinting. Here, we showcase engineered hierarchical substrate, in which the plasmonically active regions, restricted to a micron scale, two dimensional hexagonal pattern are examined. Spatial variation of signal from any analyte, uniformly coating consequently bears high registry with underlying pattern. This spatially contrasted enhancement allows optical imaging 2D solely using scattered...

10.1088/2632-959x/ac90db article EN cc-by Nano Express 2022-09-01

Modeling light-matter interaction in hybrid plasmonic materials is vital to their widening relevance from optoelectronics photocatalysis. Here, we explore photoluminescence ZnO nanorods (ZNR) embedded with gold nanoparticles (Au NPs). A progressive increase Au NP concentration introduces significant structural disorder and defects the ZNRs, which paradoxically quenches defect related visible (PL) while intensifying near band edge (NBE) emission. Under UV excitation, simulated semi-classical...

10.48550/arxiv.2307.10400 preprint EN cc-by arXiv (Cornell University) 2023-01-01

Tin Selenide (SnSe) thin film were grown onto Glass and alumina substrates by Chemical Vapor Deposition (CVD) method. The structural, micro-structural morphological characterizations of the as films investigated using XRD, SEM Raman spectroscopy which reveals that on glass are phase pure oriented SnSe while those Alumina polycrystalline with SnSe2 impurity phase. optical properties substrate studied UV-vis spectroscopy. band gap calculated is 1 to 1.3 eV for indirect direct transition in...

10.1109/tensymp54529.2022.9864375 article EN 2017 IEEE Region 10 Symposium (TENSYMP) 2022-07-01

Tin Selenide (SnSe) thin films were grown onto glass and alumina substrates by Chemical Vapor Deposition (CVD) method. The structural, micro-structural morphological characterizations of the as investigated using XRD, SEM Raman spectroscopy which reveals that on are phase pure oriented SnSe while those Alumina polycrystalline with SnSe2 impurity phase. optical properties substrate studied UV-vis spectroscopy. band gap calculated is 1 to 1.3 eV for indirect direct transition in film deposited...

10.48550/arxiv.2208.13993 preprint EN cc-by arXiv (Cornell University) 2022-01-01

Surface enhanced Raman spectroscopy, is a technique of fundamental importance to analytical science and technology where the amplified spectrum analytes used for chemical fingerprinting. Here, we showcase an engineered hierarchical substrate in which plasmonically active regions are restricted micron scale, 2D hexagonal pattern. The signal enhancement any analyte uniformly coating consequently bears high registry with This spatially segregated allows optical imaging pattern solely using...

10.48550/arxiv.2106.02876 preprint EN other-oa arXiv (Cornell University) 2021-01-01
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