A5059471703- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Transition Metal Oxide Nanomaterials
- Copper-based nanomaterials and applications
- Analytical Chemistry and Sensors
- Advanced Chemical Sensor Technologies
- Semiconductor materials and interfaces
- Ga2O3 and related materials
- Conducting polymers and applications
- Semiconductor materials and devices
- Supercapacitor Materials and Fabrication
- Advanced Sensor and Energy Harvesting Materials
- Luminescence Properties of Advanced Materials
- Chalcogenide Semiconductor Thin Films
- Integrated Circuits and Semiconductor Failure Analysis
- Thin-Film Transistor Technologies
- Surface and Thin Film Phenomena
- Semiconductor Quantum Structures and Devices
- Advanced Photocatalysis Techniques
- Catalytic Processes in Materials Science
- High-Temperature Coating Behaviors
- High Entropy Alloys Studies
- Intermetallics and Advanced Alloy Properties
- Quantum Dots Synthesis And Properties
- Advanced battery technologies research
Motilal Nehru National Institute of Technology
2016-2025
University of Allahabad
2017
National Institute Of Technology Silchar
2001-2008
Banaras Hindu University
1990-1992
Abstract CdS thin films of varying thicknesses were deposited on cleaned glass substrates at room temperature by thermal evaporation technique in a vacuum about 2 x 10 ‐5 torr. UV‐VIS spectra the studied using optical transmittance measurements which taken spectral region from 300 nm to 1100 nm. The absorbance and reflectance also studied. Optical constants such as band gap, extinction coefficient, refractive index, conductivity complex dielectric constant evaluated these spectra. All found...
In this paper we report Cu doping induced modifications in the structural, photoluminescence and gas sensing behaviour of SnO2 nanoparticles. Our results show that crystallinity is reduced upon doping. The PL emissions observed visible region are attributed to defect levels arising due oxygen vacancies. 1.5 at% Cu-doped shows selective high response (∼80%) 50 ppm concentration formaldehyde over methanol, ethanol, propanol-2-ol, acetone n-butylacetate at 200 °C. mechanism has been explained...
Here, we demonstrated the formation of active sites O<sub>2</sub><sup>−</sup> and O<sup>−</sup> on surface nanocube In<sub>2</sub>O<sub>3</sub>@RGO heterostructure, gas sensing mechanisms fluctuations in potential barrier height before after insertion acetone formaldehyde.
We report the H2 and LPG gas sensing behavior of RGO/SnO2 QDs synthesized by a surfactant assisted hydrothermal method. The QD based sensor shows high response ∼89.3% to ∼92.4% for 500 ppm test concentration at operating temperatures 200 °C 250 °C, respectively. Further, good selectivity in presence other interfering gases such as ammonia, chloroform, toluene, benzene, acetone, n-butylacetate, acetic acid formic acid. observed that is 29.8 times higher than whereas 17.8 Long-term analyses...
This study explores the synthesis of ZnO nanoparticles through a solution‐combustion route, examining their structural, photoluminescent, and photocatalytic properties upon introducing Sm as dopant. All synthesized samples display hexagonal wurtzite structure, with crystallite sizes between 55 73 nm. Field‐emission scanning electron microscopy reveals significant sample morphological variation. Diffuse reflectance spectroscopy indicates that doping 3+ results in slight decrease bandgap...
Abstract ZnO thin films were prepared by spray pyrolytic decomposition of zinc acetate onto a glass substrate. These analyzed for the optical and electrical properties. Optical studies show that in these electronic transition is direct type. The energy gap different thicknesses estimated to be range 2.98 – 3.09 eV. Electrical indicate exhibit thermally activated conduction activation energies are found dependent on film thickness. complex impedance measurements carried out over wide...