A5082844111- ZnO doping and properties
- Electrocatalysts for Energy Conversion
- Nanowire Synthesis and Applications
- Copper-based nanomaterials and applications
- Surface and Thin Film Phenomena
- Quantum Dots Synthesis And Properties
- Gold and Silver Nanoparticles Synthesis and Applications
- Gas Sensing Nanomaterials and Sensors
- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Conducting polymers and applications
- Metal and Thin Film Mechanics
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Ion-surface interactions and analysis
- Plasmonic and Surface Plasmon Research
- GaN-based semiconductor devices and materials
- 2D Materials and Applications
- Semiconductor materials and devices
- Semiconductor materials and interfaces
- Advanced Photocatalysis Techniques
- Carbon and Quantum Dots Applications
- Iron oxide chemistry and applications
- Advanced battery technologies research
University of Engineering & Management
2024-2025
Zoological Survey of India
2024
Vidyasagar University
2024
Indian Institute of Technology Kharagpur
2010-2021
Yonsei University
2021
National Institute of Technology Durgapur
2017-2020
Bar-Ilan University
2019
Institute of Physics, Bhubaneshwar
2012-2018
Homi Bhabha National Institute
2016-2017
Universidade Nova de Lisboa
2016
The development of an active, earth-abundant, and inexpensive catalyst for the oxygen evolution reaction (OER) is highly desirable but remains a great challenge. Here, by combining experiments first-principles calculations, we demonstrate that MoS2 quantum dots (MSQDs) are efficient materials OER. We use simple route synthesis MSQDs from single precursor in aqueous medium, avoiding formation unwanted carbon (CQDs). as-synthesized exhibit higher OER activity with lower Tafel slope comparison...
Abstract Development of effective anti-microbial therapeutics has been hindered by the emergence bacterial strains with multi-drug resistance and biofilm formation capabilities. In this article, we report an efficient green synthesis silver nanoparticle (AgNP) in situ reduction capping a semi-synthetic polysaccharide-based biopolymer (carboxymethyl tamarind polysaccharide). The CMT-capped AgNPs were characterized UV, DLS, FE-SEM, EDX HR-TEM. These have average particle size ~20–40 nm, show...
Abstract The development of efficient materials for the generation and storage renewable energy is now an urgent task future demand. In this report, molybdenum disulphide hollow sphere (MoS 2 -HS) its reduced graphene oxide hybrid (rGO/MoS -S) have been synthesized explored applications. surface morphology, crystallinity elemental composition as-synthesized thoroughly analysed. Inspired by fascinating morphology MoS -HS rGO/MoS -S materials, electrochemical performance towards hydrogen...
Here, a hybrid material of sandwiched reduced graphene oxide (rGO) and N,S co-doped carbon quantum dots (N,S-CQDs) was prepared following facile synthetic route.
Light-matter interaction at the atomic scale rules fundamental phenomena such as photoemission and lasing while enabling basic everyday technologies, including photovoltaics optical communications. In this context, plasmons, collective electron oscillations in conducting materials, are important because they allow manipulation of fields nanoscale. The advent graphene other two-dimensional crystals has pushed plasmons down to genuinely dimensions, displaying appealing properties a large...
The family of group IV-VI monochalcogenides has an atomically puckered layered structure, and their atomic bond configuration suggests the possibility for realization various polymorphs. Here, we report synthesis first hexagonal polymorph from monochalcogenides, which is conventionally orthorhombic. Recently predicted four-atomic-thick GeSe, so-called {\gamma}-GeSe, synthesized clearly identified by complementary structural characterizations, including elemental analysis, electron...
<title>Abstract</title> In the quickly changing healthcare environment, this paper presents a novel framework comprising Decentralized and Personalized Federated Learning (DCPFL), which leverages decentralized model storage using Inter-Planetary File System (IPFS). By addressing data privacy personalization, we established consortium blockchain for integrity used IPFS efficient parameter storage. Our innovative synchronization mechanism enhances collaboration between institutions gossip...
Controlled assembly of mesoscopic structures can bring interesting phenomena because their interfaces. Here, carbon nanotubes (CNTs) are cross-coupled via a C–C bonding through Suzuki reaction resulting in three-dimensional (3D) CNT sponges, and these 3D CNTs studied for efficacy toward the electrocatalytic hydrogen evolution (HER) acidic medium—one promising methods production renewable energy source, hydrogen. Both single multiwall (SWCNTs MWCNTs) development 3DSWCNTs 3DMWCNTs, found to be...
The lowering of the work function (Φ) can lead to a better field emission (FE) behavior at lower threshold fields. We report on enhanced FE from randomly oriented and faceted Au-capped ZnO hetero-nanostructures (HNs) having more oxygen defects. Large-area arrays non-aligned, HNs, such as nanowires (NWs) triangular nanoflakes (TNFs) are grown using chemical vapor deposition (CVD) method. Enhanced properties TNF sample resulted in turn-on low 0.52 V μm(-1) current density 0.1 mA cm(-2)...
A simple single-step chemical vapor deposition (CVD) method has been used to grow the faceted Au-ZnO hetero-nanostructures (HNs) either with nanowires (NWs) or triangular nanoflakes (TNFs) on crystalline silicon wafers varying oxygen defect density in ZnO nanostructures. This work reports use of these nanostructures substrates for photodegradation rhodamine B (RhB) dyes and phenol under visible light illumination. The photoluminescence measurements showed a substantial enhancement ratio...
We have developed low-voltage (<2 V) flexible organic field-effect transistors (OFETs) with high carrier mobility using gelatin as a moisture-induced ionic gate dielectric system. Ionic concentration in the layer depends on relative humidity condition during measurement. The capacitance of used for calculation OFETs crucially frequency at which was measured. results frequency-dependent together anomalous bias-stress effect been to determine exact should be calculated. observed devices is...
A facile one-step approach has been developed for the synthesis of carbon quantum dots (CQDs) from Good’s buffer.
Organic field-effect transistors (OFETs) with hexagonal barium titanate nanocrystals (h-BTNCs) in amorphous matrix as one of the bilayer dielectric systems have been fabricated on a highly flexible 10 μm thick poly(ethylene terephthalate) substrate. The device current and mobility remain constant up to bending radius 4 mm, which makes substrate suitable for wearable e-skin applications. h-BTNC films are found be temperature-sensitive, OFETs designed based this material showed ultraprecision...
A single step process to grow Au capped oxygen deficient GeO2 crystalline nanowires via generation of growth species through the metal induced surface decomposition Ge substrate is reported. Without external source supply, Au-GeO2 on addressed with possible mechanism. Despite high band gap, application as a new material for visible light photodetection presented. The as-grown samples were found have photo-response ≥102 17% quantum efficiency at −2.0 V applied bias upon visible-light...
Metal-insulator-silicon devices with Ge nanocrystals dispersed in Al2O3 have been studied a view to exploit them for floating gate memory applications. Multilayer comprising of five layers exhibited superior characteristics over the single layer and multilayer Si reported literature. The effect interface traps on behavior using frequency dependent capacitance- conductance-voltage measurements has investigated. This study demonstrated an enhanced window retention characteristics, owing...
Photocatalytic efficiency of unsubstituted ZnO is greater than Li substituted nanorods due to the presence defect states and higher charge carrier density.
Surface enhanced Raman spectroscopy (SERS) has been established as a powerful tool to detect very low-concentration bio-molecules. One of the challenging problems is have reliable and robust SERS substrate. Here, we report on simple method grow coherently embedded (endotaxial) silver nanostructures in silicon substrates, analyze their three-dimensional shape by scanning transmission electron microscopy tomography demonstrate use highly reproducible stable substrate for measurements....
Silica, generally known as silicon dioxide is insulating in nature whereas semiconducting. These two materials are widely used sensing and electronic devices. In order to full-fill demand of silicon, sources other than sand, have explore for extraction. this report, bamboo culms been subjected thermo chemical decomposition at high temperature (1250 °C) an inert atmosphere. After pyrolysis, contents residual characterized by using scanning electron microscope (SEM), transmission (TEM) X-ray...
We report on the synthesis and UV-vis photodetection application of p-type MoO2 nanostructures (NSs) Si substrate. β-MoO2 NSs have been synthesized from previously grown α-MoO3 structures/n-type via a hydrogenation process at 450 °C. After hydrogenation, structures were completely converted into without presence sub-oxidized phases molybdenum oxide. The as-grown exhibited very good electrical conductivity ≈2.02 × 103 S-cm-1 with hole mobility ≈7.8 ± 1.3 cm2-V-1-Sec-1. To explore...
In this paper, we investigate the role of deposition angle on physical properties and work function pulsed dc sputter-deposited Al-doped zinc oxide (AZO) thin films. It is observed that average grain size crystal quality increase with higher deposition, yielding improved optical properties. A systematic blue shift as well a decrease in resistivity takes place increasing growth up to 70°, while an opposite trend beyond that. addition, AZO films also measured using Kelvin probe force...