A5078679266- Graphene research and applications
- Quantum and electron transport phenomena
- Molecular Junctions and Nanostructures
- Surface and Thin Film Phenomena
- Topological Materials and Phenomena
- 2D Materials and Applications
- Surface Chemistry and Catalysis
- Force Microscopy Techniques and Applications
- Advanced Photocatalysis Techniques
- Quantum Dots Synthesis And Properties
- Advanced Materials Characterization Techniques
- Advanced biosensing and bioanalysis techniques
- TiO2 Photocatalysis and Solar Cells
- MXene and MAX Phase Materials
- Electrochemical sensors and biosensors
- Electrospun Nanofibers in Biomedical Applications
- Copper-based nanomaterials and applications
- Mesoporous Materials and Catalysis
- Physics of Superconductivity and Magnetism
- Porphyrin and Phthalocyanine Chemistry
- Supercapacitor Materials and Fabrication
- Magnetic properties of thin films
- Carbon Nanotubes in Composites
- Metal and Thin Film Mechanics
- Magnetic and transport properties of perovskites and related materials
Indian Institute of Science Education and Research Pune
2015-2024
University Hospitals of Leicester NHS Trust
2022
Savitribai Phule Pune University
2008-2019
Indian Institute of Science Education and Research Berhampur
2019
Indian Institute of Science Education and Research Mohali
2019
Indian Institute of Science Education and Research Kolkata
2019
Indian Institute of Science Education and Research, Bhopal
2019
Indian Institute of Science Education and Research, Tirupati
2019
Ohio University
2004-2016
National Chemical Laboratory
2009-2014
CdS nanoparticles were deposited on a highly stable, two-dimensional (2D) covalent organic framework (COF) matrix and the hybrid was tested for photocatalytic hydrogen production. The efficiency of CdS-COF investigated by varying COF content. On introduction just 1 wt% COF, dramatic tenfold increase in overall activity observed. Among various hybrids synthesized, that with 10 named (90:10), found to exhibit steep H2 production amounting 3678 μmol h(-1) g(-1), which is significantly higher...
We carried out scanning tunneling spectroscopy measurements on exfoliated monolayer graphene ${\text{SiO}}_{2}$ to probe the correlation between its electronic and structural properties. Maps of local density states are characterized by electron hole puddles that arise due long-range intravalley scattering from intrinsic ripples in random-charged impurities. At low energy, we observe short-range intervalley which attribute lattice defects. Our results demonstrate properties influenced...
Two conformations of isolated single TBrPP-Co molecules on a Cu(111) surface are switched by applying +2.2 V voltage pulses from scanning tunneling microscope tip at 4.6 K. The has spin-active cobalt atom caged its center and the interaction between spin this free electrons substrate can cause Kondo resonance. Tunneling spectroscopy data reveal that switching saddle to planar molecular conformation enhances spin-electron coupling, which increases associated temperature 130 K 170 This result...
Starch is an attractive polymer for wound healing applications because of its wide availability, low cost, biocompatibility, biodegradability and wound-healing property. Here, we have fabricated starch-based nanofibrous scaffolds by electrospinning applications. The diameter the optimized nanofibers was determined field emission scanning electron microscopy (FE-SEM) found to be in range 110–300 nm. mechanical strength (0.5–0.8 MPa) attuned using polyvinyl alcohol (plasticizer) glutaraldehyde...
We report the manipulation of a Kondo resonance originating from spin-electron interactions between two-dimensional molecular assembly TBrPP-Co molecules and Cu(111) surface at 4.6 K. By manipulating nearest-neighbor with scanning tunneling microscope tip we are able to tune coupling center molecule inside hexagonal in controlled step-by-step manner. The temperature increases 105 170 K decreasing number nearest neighbor six zero. scattering electrons by located edges layer reduces strength...
Liquid phase exfoliation (LPE) of non-van der Waals materials has added a new feature to the research frontier two-dimensional materials. However, these LPE reports mostly focus on structures sheets. The information and insights into their local electronic properties are often missing. In this first such report, using atomic-scale characterization theoretical calculations, we discuss adsorption borophene Au(111) identify adsorbed be β12 phase. It is seen metallic as opposed insulating bulk...
We present a lithography-free technique for fabrication of clean, high quality graphene devices. This is based on evaporation through hard Si shadow masks, and eliminates contaminants introduced by lithographical processes. demonstrate that devices fabricated this have significantly higher mobility values than those obtained standard electron beam lithography. To obtain ultra-high devices, we extend to fabricate suspended samples with mobilities as 120 000 cm2/(V·s).
While graphene has attracted significant attention from the research community due to its high charge carrier mobility, important issues remain unresolved that prevent widespread use in technologically applications such as digital electronics. For example, chemical inertness of hinders integration with other materials, and lack a bandgap implies poor switching characteristics transistors. The formation ordered organic monolayers on potential address each these challenges. In particular,...
Defects in semiconductors play a crucial role modifying their electronic structure and transport properties. In transition metal dichalcogenides, atomic chalcogen vacancies are primary source of intrinsic defects. While the impact these on electrical has been widely studied, exact remains not fully understood. this work, we correlate optical spectroscopy, low-temperature measurements, scanning tunneling microscopy (STM), first-principles density functional theory (DFT) calculations to...
Abstract Coronary artery disease (CAD) is a major cause of ill health and death worldwide. computed tomographic angiography (CCTA) the first-line investigation to detect CAD in symptomatic patients. This diagnostic approach risks greater second-line heart tests treatments at cost patient system. The National Health Service funded use an artificial intelligence (AI) tool, tomography (CT)-derived fractional flow reserve (FFR-CT), patients with chest pain improve physician decision-making...
Using scanning tunneling microscopy, we have imaged local charge density fluctuations in monolayer graphene. By placing a small gold nanoparticle on the end of STM tip, sensor is created. raster tip over surface and using Coulomb blockade spectroscopy, map We observe series electron hole doped puddles with characteristic length scale about 20 nm. Theoretical calculations for correlation based number impurities are agreement our measurements.
Molecular-scale control over the integration of disparate materials on graphene is a critical step in development graphene-based electronics and sensors. Here, we report that self-assembled monolayers 10,12-pentacosadiynoic acid (PCDA) epitaxial can be used to template reaction directed growth atomic layer deposited (ALD) oxide nanostructures with sub-10 nm lateral resolution. PCDA spontaneously assembles into well-ordered domains consisting one-dimensional molecular chains coat entire...
We have performed low temperature scanning tunneling spectroscopy measurements on exfoliated bilayer graphene SiO2. By varying the back gate voltage we observed a linear shift of Dirac point and an opening bandgap due to perpendicular electric field. In addition observing in point, also measured its spatial dependence using spatially resolved spectroscopy. The variation was not correlated with topographic features therefore attribute random charged impurities.
In the present investigation, we report a detailed examination of effect off-stoichiometry introduced in NiCo2O4 by adding excess cobalt. Thus, compare and analyze structural magnetic properties Ni0.75Co2.25O4 cubic systems. A low temperature combustion method was utilized to synthesize stoichiometric (NiCo2O4) off-stoichiometric (Ni0.75Co2.25O4) nanoparticles on large scale. The X-ray diffraction pattern for sample annealed at high (773 K) shows presence much less intense NiO phase (∼2–5%)...
In this study, we have combined the wound-healing properties of two biodegradable polymers, viz., starch and gelatin, reinforced their mechanical strength through cross-linking. Further, scaffolds polymer combination were used to support an organotypic culture human skin for wound healing. Human dermal fibroblasts (HDFs) epidermal keratinocytes (HEKs) isolated seeded on days 1 7, respectively. The scaffold was then air-lifted develop a stratified layer. Hematoxylin eosin (H&E) staining...
We report a novel atom extraction mechanism from the native substrate by means of scanning tunneling microscope tip-crash on Ag(111) surface at 5 K. Individual atoms are scattered when silver coated tip is dipped into low biases. Quantitative analyses reveal that mechanical energy supplied dominates process. Application this procedure demonstrated constructing quantum structures using extracted an atom-by-atom basis.
We investigate the atomistic details of a single atom-extraction process realized by using scanning tunneling microscope tip-cluster interaction on Ag(111) surface at 6 K. Single atoms are extracted from silver cluster one atom time small biases less than 35 mV. Combined total energy calculations and molecular dynamics simulations show lowering barrier upon approaching tip to cluster. Thus, mere tuning proximity between governs extraction process. The atomic precision reproducibility this...