A5069071870- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Nanowire Synthesis and Applications
- Perovskite Materials and Applications
- Conducting polymers and applications
- Nanomaterials and Printing Technologies
- Copper-based nanomaterials and applications
- TiO2 Photocatalysis and Solar Cells
- Surface Modification and Superhydrophobicity
- Ga2O3 and related materials
- Advanced Photocatalysis Techniques
- Organic Electronics and Photovoltaics
- Organic Light-Emitting Diodes Research
- Advancements in Semiconductor Devices and Circuit Design
- Transition Metal Oxide Nanomaterials
- 2D Materials and Applications
- Robotics and Sensor-Based Localization
- Human Pose and Action Recognition
- Silicon Nanostructures and Photoluminescence
- Carbon and Quantum Dots Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Fluid Dynamics and Thin Films
- Mathematical Inequalities and Applications
- Nonlinear Optical Materials Studies
- Blockchain Technology Applications and Security
Indian Institute of Science Bangalore
2022-2025
Indian Institute of Technology Bombay
2024
Indian Institute of Technology Kharagpur
1992-2023
Gauhati University
1969
An ordered array of 1D ZnO nanorods obtained by colloidal templating is shown to dramatically enhance the sensing response NO x at room temperature confining light and creating periodic structures. The sensitivity measured for a concentration varying from 2 10 ppm (response 53% ppm) under white illumination with ≈225 nm hole diameter. In contrast, structures ≈450 size show better 98% elevated temperatures in dark conditions, which attributed increased surface chemical interactions molecules...
Abstract Fabrication of superhydrophobic surfaces with extremely low contact angle hysteresis (θ CAH < 4°), which exhibits excellent self‐cleaning behavior by colloidal template–guided hydrothermal growth zinc oxide nanorods (ZnO NRs), is reported. A hexagonal close packed monolayer polystyrene (PS) colloids first deposited spin coating on a thin poly(methyl methacrylate) (PMMA) film. Subsequently, the array transferred to substrate precoated sputtered seed layer UV‐Ozone (UVO) mediated...
As one kind of ecofriendly organic semiconductor materials, chlorophyll has attracted great attention with useful optical properties. Although pigments such as chlorophyll-a (Chl-a) are explored widely, chlorophyll-b (Chl-b) is rarely studied even though it possesses outstanding properties impressive stability. Here, Chl-b extracted from spinach leaves using a very simple and cost-effective method to study its potential use on Si nanowire (NW) heterostructures having volume concentration...
A relatively less explored plasmonic material, Pd, on the TiO2 interface has been utilized to boost catalytic efficiency of rutile as a photoelectrocatalyst material. To obtain desired behavior, Pd ions deposited over were reduced under cold/nonthermal hydrogen plasma, for complete reduction as-deposited metallic nanoparticles. The Pd@TiO2 photocatalyst, thus prepared, was then extensively characterized. We emphasize that this particular catalyst can be used photoelectrocatalyst, is found...
Holey layer of the TiO2 nanorod-covered surface obtained by self-organization polysterene (PS) templates is shown to achieve programmable wettability creating nano- micrometer-scale porosity, which useful demonstrate stable and self-powered Schottky junction-based UV photodetectors. The characterized static water contact angle (WCA) found be ∼40° (weak hydrophilic) with nanorod film pores a diameter 9.91 μm periodicity 2.8 μm. In contrast, holey 90 nm 1.4 shows WCA ≈ 166°, do not require any...
Nanopatterning of the active layer with feature size comparable to wavelength visible light is a popular strategy for improving performance optoelectronic devices, as these structures enhance optical path length by trapping due combined contribution multiple scattering, diffraction, and antireflection. Here, we report fabrication ZnO/CdS self-biased heterojunction photodetectors on soft lithographically patterned PEDOT:PSS layers grating geometry. The present study combines robustness...
Abstract d1. Here we derive the inequality for v+2α>0, α+0. Gurland [1] obtained v+α>0, α+0,1. Again, Gokhale [2] has shown that v > 2, α+0, -1, and it been pointed out (1.3) is stronger than (1.2) -v/2 < α 0 (v large), i.e. negative only, positive Gurland's powerful.
Multimodal device operations are essential to advancing the integration of 2D semiconductors in electronics, photonics, information and quantum technology. Precise control over carrier dynamics, particularly exciton generation transport, is crucial for finetuning functionality optoelectronic devices based on semiconductor heterostructure. However, traditional engineering methods mainly restricted artificially assembled vertical pn heterostructures with electrical or strain induced...
We report a monolithic bidirectional dual-gate metal–oxide–semiconductor field-effect transistor fabricated on epitaxially grown β-Ga2O3, demonstrating efficient two-way conduction and blocking. It features two independently controlled gates operates in four distinct modes, offering flexibility managing current voltage the first third quadrants. This versatility makes it ideal for various power conversion system applications. The device at low negative threshold (∼−2.4 V both gates), with...
Nitrogen-doped carbon dots (NCDs), exhibiting strong yellow emission in aqueous solution and solid matrices, have been utilized for fabricating heterostructure white electroluminescence devices. These devices consist of nitrogen-doped as an emissive layer sandwiched between organic hole transport (PEDOT:PSS) array rutile TiO2nanorods, acting electron layer. Under applied forward bias 5 V, the device exhibits broadband covering wavelength range 390-900 nm, resulting pure light characteristics...
We experimentally demonstrate improvement in electrical and optoelectronic properties of 2D material-based field effect transistor (FET) devices with the help patterned dielectric. Nanopatterned hexagonal boron nitride (hBN) (dielectric)/ p-type WS <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> (semiconductor channel material) FETs have been used for this purpose. Through nano-patterning, we reduced effective thickness gate dielectric...
This paper reports a broadband absorption of gold nanoparticle-decorated chlorophyll b. Chlorophyll b was extracted from spinach. Au nanoparticles were synthesized by chemical method. Structural and optical characterization chlorophyll-b nano-particles also studied. Current-voltage characteristics studied fabricating devices using etched ITO glass. Chlorophyll-b has strong in the blue region at 435 nm red 665 nm, whereas nanoparticle its plasmonic peak 535 nm. gives broad spectrum ranging...
This paper describes a system which obtains structural scene description of 3-D objects from range images. The uses hierarchical approach to obtain higher level primitives lower ones. Instead detailed mathematical approach, qualitative reasoning by rule based deduction is used the description. bases are also and several special control strategies like pruning, windowing (or zoning) fact inhibition considerably improve speed system. Experimental results performance on actual images presented.
Hybrid metal-halide perovskite solar cells (PSC), developed on a lab scale, have been shown to exhibit high power conversion efficiency (PCE). Hence, developing these devices an industrial scale is being pursued. Compared planar devices, back-contact interdigitated electrode (BCIE) architectures several potential benefits: low reflection and parasitic absorption in metal contacts, large active area for light absorption, higher PCE. In this paper, we successfully fabricated large-area (~ 2.25...