A5062323688- Advanced Materials Characterization Techniques
- Microstructure and mechanical properties
- Advanced Electron Microscopy Techniques and Applications
- Electron and X-Ray Spectroscopy Techniques
- Force Microscopy Techniques and Applications
- nanoparticles nucleation surface interactions
- High Entropy Alloys Studies
- Advanced Photocatalysis Techniques
- Semiconductor materials and devices
- Surface and Thin Film Phenomena
- Electrocatalysts for Energy Conversion
- High-Temperature Coating Behaviors
- Electronic and Structural Properties of Oxides
- Aluminum Alloy Microstructure Properties
- Chalcogenide Semiconductor Thin Films
- Graphene research and applications
- ZnO doping and properties
- Catalytic Processes in Materials Science
- Intermetallics and Advanced Alloy Properties
- TiO2 Photocatalysis and Solar Cells
- Additive Manufacturing and 3D Printing Technologies
- Nanoparticles: synthesis and applications
- Additive Manufacturing Materials and Processes
- 2D Materials and Applications
- Advancements in Battery Materials
Indian Institute of Technology Gandhinagar
2018-2025
Indian Institute of Technology Hyderabad
2023
Lawrence Berkeley National Laboratory
2011-2016
Molecular Foundry
2015-2016
University of Virginia
2007-2013
University of California, Berkeley
2011-2013
University of Oklahoma
2010
University of Alabama at Birmingham
2005
Grain boundaries are observed and characterized in chemical vapor deposition-grown sheets of hexagonal boron nitride (h-BN) via ultra-high-resolution transmission electron microscopy at elevated temperature. Five- seven-fold defects readily along the grain boundary. Dynamics strained regions boundary resolved. The defect structures resulting out-of-plane warping consistent with recent theoretical model predictions for h-BN.
Atomically precise tailoring of graphene can enable unusual transport pathways and new nanometer-scale functional devices. Here we describe a recipe for the controlled production highly regular "5-5-8" line defects in by means simultaneous electron irradiation Joule heating applied electric current. High-resolution transmission microscopy reveals individual steps growth process. Extending earlier theoretical work suggesting valley-discriminating capabilities 5-5-8 defect, perform...
An easily scalable fabrication method has been explored to obtain atomically thin gallium telluride (GaTe), which opens up new prospective applications of this well-known material. Due nanostructuring, the optical and electrochemical properties 2D GaTe at room temperature see remarkable improvements. The effects surface defects on have also demonstrated. performance as a supercapacitor is investigated. It shows significantly high specific capacitance, 14 F g–1 (without additive/composite...
<div class="section abstract"><div class="htmlview paragraph">A novel sintering method of bridging the two mechanically polished and oriented single-crystals together face-to-face in a non- environmental controlled atmosphere to fabricate bicrystal substrate NaCl macroscopic thickness, with common zone axis having planarity over large areas, has been developed. Epitaxial [001] bicrystalline thin face-centered cubic (fcc) metal film surface-reactive metal-containing tilt grain...
A model based on the near-coincidence of diffraction intensity weighted reciprocal-lattice spots is proposed to determine preferred orientation relationships between two crystalline phases. The found by minimizing three-dimensional lattice mismatch, i.e. maximizing total overlapping intensity, crystals. procedure biased towards matching reciprocal sites with high structure-factor values, which physically equivalent planes atomic density. In contrast previous models, including in present...
Using extended time series scanning transmission electron microscopy, we investigate structural fluctuations at an incommensurate grain boundary in Au. Atomic-resolution imaging reveals the coalescence of two interfacial steps, or disconnections, different height via coordinated motion atoms along close-packed directions. Numerical simulations uncover a transition pathway that involves constriction and expansion characteristic stacking fault often associated with boundaries face-centered...
We show that many complex gold nanostructures such as the water chestnut, dog bone, nanobar, and octahedron, which are not easily accessible via a direct seed-growth synthesis approach, can be prepared overgrowth of same nanorods by varying pH Ag concentrations in growth solution. Overgrown nanostructures' shapes were determined rate atom deposition, is faster at higher pH. In presence AgNO3, codeposition silver atoms affects overgrown nanostructures, particularly high
A model based on near coincidence of diffraction intensity-weighted reciprocal lattice spots was used to study the orientation relationships between a precipitate and matrix in various alloys. The calculate relationship interface orientations phases including body-centred cubic, tetragonal, face-centred cubic hexagonal close-packed crystals. Comparison calculated results with those reported from experimental observations demonstrate that most cases can predict two an accuracy few degrees or...
ABSTRACT The fate of organometallic dust subjected to extreme conditions, especially the shock fronts, in interstellar medium (ISM) has not been explored date. Iron and cyclopentadiene, which have found be present ISM, are known react produce compound ferrocene under terrestrial conditions. In our experiment we ferrocene, a possible proxy such dust, ∼5.6 Mach (M) commensurate with conditions encountered leading temperature rise up 7300 K within 2 ms. Analysis post-shock residue showed...
Using transmission electron microscopy, we have analyzed the structure of nanoporous NiO formed by thermal decomposition Ni(OH)2. It was found that a tabular single crystal Ni(OH)2 transforms pseudomorphically to an array topotaxially aligned nanocubes separated nanoscale pores at volume fraction about 50%. High-resolution tomography on produced ex situ heating combined with direct in observation transformation under beam revealed dramatic redirection reaction front when are closed...