A5008088904- Gas Sensing Nanomaterials and Sensors
- ZnO doping and properties
- Advanced Photocatalysis Techniques
- Gold and Silver Nanoparticles Synthesis and Applications
- Quantum Dots Synthesis And Properties
- Analytical Chemistry and Sensors
- Copper-based nanomaterials and applications
- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Plasmonic and Surface Plasmon Research
- Magnetic and transport properties of perovskites and related materials
- Conducting polymers and applications
- Multiferroics and related materials
- Hip and Femur Fractures
- Ferroelectric and Piezoelectric Materials
- Advanced biosensing and bioanalysis techniques
- Advanced machining processes and optimization
- Musculoskeletal Disorders and Rehabilitation
- Nuclear materials and radiation effects
- Luminescence Properties of Advanced Materials
- Fungal Infections and Studies
- Infectious Diseases and Mycology
- TiO2 Photocatalysis and Solar Cells
- Protein Interaction Studies and Fluorescence Analysis
- Carbon and Quantum Dots Applications
Sambalpur University
2023-2024
Indira Gandhi Centre for Atomic Research
2018-2023
Homi Bhabha National Institute
2018-2023
National Institute of Science Education and Research
2022-2023
All India Institute of Medical Sciences
2019-2021
Safdarjang Hospital
2017
Pondicherry University
2015
Defect chemistry in SnO2 is well established for resistive sensors but remains to be elusive photoluminescence (PL) sensors. It demands a comprehensive understanding of the role cationic and oxygen defects as creation abundant such provide selective PL signal. To accomplish it, quantum dots (QDs ∼ 2.4 nm) are prepared without capping agent along with other dimensions. Then, relationship blue-emission unfolded by electron energy loss spectroscopy, lifetime measurements, X-ray absorption,...
Energy-efficient synthesized ZnS QDs with unique visible range absorption through defects show the best photocatalytic activity under UV light and degradation light.
The utility of different types surface defects in SnO₂ nanoparticles (NPs) for the detection low concentration (50 ppm) methane (CH₄) at relatively temperature 50 °C is established. Chemically synthesized quantum dots are annealed air and Ar environments 800 to make two sets NPs. Variation dimension, morphology optical properties due annealing conditions elaborated using X-ray diffraction, transmission electron microscopy UV Visible spectroscopy respectively. Electron energy loss provides an...
Pressure-induced phase transition studies in nanomaterials are important to comprehend thermodynamics at the nanoscale. Raman spectroscopic high pressure a diamond anvil cell were performed up 40 GPa on rutile tetragonal of SnO2 nanoparticles (NPs) sizes ∼2, 4, and 25 nm investigate their stability phonon anharmonicity. In NPs, evidence transitions was observed ∼11 ∼24 GPa, 4 NPs indicated cubic ∼21 2.4 quasi-nanocrystals found stable 30 GPa. spectra down 90 K that phonons more anharmonic....
The strong electric field created by plasmons in the surface or tip-enhanced Raman scattering (SERS TERS)-based detection of ultralow organic and biological molecules finds limited success case inorganic such as SnO2. Our report highlights fabrication a highly efficient Ag SERS substrate first direct evidence A1g mode rutile SnO2 quantum dots (QDs). QDs show an uncharacteristic broad feature around 575 cm–1. First, ultraefficient with huge enhancement is demonstrated display single-molecule...
Abstract Noble-metal-decorated semiconductor photocatalysts have attracted noticeable attention due to their enhanced photocatalytic activity. Herein, we synthesized the pure rutile phase of TiO 2 nanorods, with microflower morphology, using a hydrothermal method and decorated them Au observe plasmon-induced efficiency. The optical bandgap engineering through Au-decorated introduces midgap states that help charge compensation during photodegradation studies. surface plasmonic resonance peak...
One-dimensional (1D) SnO 2 sub-wavelength waveguides are a critical contribution to advanced optoelectronics. Further understanding of the surface defects and role morphology in 1D nanowires can help better utilize these nanostructures more efficiently. For this purpose, three different (NWs), namely belts, cylindrical- square-shaped structures were grown using quantum dots as precursor material. The growth process NWs is discussed. nanobelts observed grow up 3 mm length. Morphological...
Oxygen vacancy (OV)-enriched black TiO2 (BTO) is a promising material for supporting well-studied noble metals in the hydrogen evolution reaction (HER). Blackening by incorporating OVs substantially changes electronic state of BTO and enhances HER catalytic performance compared to pristine TiO2. Furthermore, incorporation vacancies leads deviation from single anatase phase on localized scale creates heterojunction promoting occurrence rutile segments. Hence, synthesizing biphasic (rutile...
Abstract The combination of 2D materials and noble metallic nanostructure is becoming an attractive research domain for label-free, highly sensitive surface-enhanced Raman spectroscopy (SERS) applications. This study demonstrated photocatalysis degradation SERS enhancements organic fluorophore (Rhodamine 6G) on two-dimensional (2D) TiSe 2 using spectroscopy. Au nanoparticles (NPs) were decorated thin films by thermal annealing at variable temperatures. selective deposition NPs the hexagonal...
For low-dimensional systems, symmetry breaking and surface reconstruction are critical for the observation of special vibrational properties technical significance such as optical (SO), anharmonic, disorder-activated phonon (DAP) modes. First, earlier unobserved modes SO DAP disclosed cubic zinc sulfide (ZnS) nanoparticles (NPs) 3–5 nm size by adopting an experimental process without any stabilizing agent at low temperatures. The emphatic influence defects, in particular, elemental "S"...