Home > Materials Science Centre > Ahin Roy
The research of the group covers the broad theme of inorganic functional nanomaterials. The aim is to ‘make’ the materials through wet-chemical synthesis, ‘see’ them at atomic-scale through aberration-corrected scanning transmission electron microscopy (AC-STEM), ‘explore’ their structural and electronic properties through density functional theory (DFT) simulations, and ‘apply’ them in suitable applications.
This combinatorial approach is quite powerful for solving materials problems. The fun lies in the fact that sometimes computation leads to guided experiments, and sometimes it helps to understand experimental data. The experimental approach involves synthesis and interrogation of materials of interest at atomic-scale. This can be achieved through wet-chemistry and AC-STEM. And the computations involve atomistic DFT simulations. Given a judicious choice of systems, AC-STEM and DFT are often truly complementary and are quite useful to establish structure-property relationship in functional nanomaterials. Such correlative understanding is key to engineer materials for desired applications.
In terms of materials, currently functional oxides, chalcogen (Te & Se) and metal (Au and Pt) nanowires are of interest. We intend to establish structure-property relationship in these functional nanomaterials to apply them in a various applications, ranging from nanoscale electronic devices to macroscale regular devices, catalysis, energy conversion and storage.
Wrinkling of Atomic Planes in Ultrathin Au Nanowires by Roy A., Kundu S. , Müller K. , Rosenauer A. , Singh S. , Pant P. , Gururajan M. P., Kumar P. , Weissmüller J. , Singh A. K., Ravishankar N. Nano Letters 14 4859-4866 (2014)
Semiconductor-like Sensitivity in Metallic Ultrathin Gold Nanowire based Sensors by Roy A., Pandey T. , Ravishankar N. , Singh A. K. Journal of Physical Chemistry C 118 676-682 (2014)
Manipulation of Optoelectronic Properties and Band Structure Engineering of Ultrathin Te Nanowires by Chemical Adsorption by Roy A., Amin K. R., Tripathi S. , Biswas S. , Singh A. K., Bid A. , Ravishankar N. ACS Applied Materials and Interfaces 9 19462-19469 (2017)
Insights on Nucleation and Growth of Different Phases of WO3: Morphology Control and Electrochromic Property by Ghosh K., Roy A. , Tripathi S. , Ghule S. , Singh A. K., Ravishankar N. Journal of materials Chemistry C 5 7307-7316 (2017)
Phase & Morphology Engineered Surface Reducibility of MnO2 Nano-heterostructures: Implications on Catalytic Activity towards CO Oxidation by Jain N., Roy A. Materials Research Bulletin 121 110615- (2020)
Reduced SrTiO3-Supported PtCu Alloy Nanoparticles for Preferential Oxidation of CO in Excess Hydrogen by Jain N., Roy A. , Nair S. Nanoscale 11 22423-22431 (2019)
Covalently interconnected transition metal dichalcogenide networks via defect engineering for high-performance electronic devices by Ippolito S., Kelly A. G., De Oliveira R. F., Stoeckel M. , Iglesias D. , Roy A. , Downing C. , Bian Z. , Lombardi L. , Samad Y. A., Nicolosi V. , Ferrari A. C., Coleman J. N., Samori P. Nature Nanotechnology 16 592-598 (2021)
Mechanistic Understanding of Formation of Ultrathin Single-Crystalline Pt Nanowires by Samantaray D., Gayen M. , Roy A. , Bellare P. , Ravishankar N. Journal of Physical Chemistry C 125 27458-27464 (2021)
Scalable faceted voids with luminescence enhanced edges in WS2 monolayers by Kumar P., Chatterjee D. , Maeda T. , Roy A. , Kaneko K. , Balakrishnan V. Nanoscale 10 16321-16331 (2018)
Negative Differential Resistance in Armchair Silicene Nanoribbons by Manjanath A., Roy A. , Samanta A. , Singh A. K. Nanotechnology 28 275402- (2017)
Atomic-scale Electron Microscopic Interrogation and Electronic Structure Simulations of Heterostructure Catalysts for CO Oxidation (AtomCAT) ISIRD, SRIC
Atomic-scale Structural and Electronic Interrogation of Symmetry-broken Noble Metal Nanostructures for Oxygen Reduction Reaction Science and Engineering Research Board (SERB)
Anupama Behera
Area of Research: Electronic properties and transport in 2D materials
Annapurna Pal
Area of Research: Solid State Inorganic Chemistry
Ajoy Dinda
Area of Research: Atomic-scale Investigation of Catalytic Nanomaterials
Pijush Sardar
Area of Research: Computational design of functional nanomaterials