Nishant Shukla
@tezu.ernet.in
Dr. / Physics
tezpur university
RESEARCH, TEACHING, or OTHER INTERESTS
Materials Science, Electronic, Optical and Magnetic Materials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Rituraj Mahanta, Pawan Chetri, Nishant Shukla, and Dulen Bora
Elsevier BV
Pawan Chetri and Nishant Shukla
Springer Science and Business Media LLC
Masum Das, Nishant Shukla, Bitupon Boruah, Ankur Gogoi, Lakshi Saikia, Swapnali Hazarika, Utpal J. Mahanta, Jayanta K. Sarmah, and M. Deka
Elsevier BV
Masum Das, Bitupon Boruah, Nishant Shukla, Ankur Gogoi, Munu Borah, Lakshi Saikia, Jayanta K. Sarmah, and M. Deka
Elsevier BV
Rupkamal Chetia, Shrutipriya Devi, Nishant Shukla, Abhishek Hazarika, Shreemoyee Bordoloi, Binod Pokhrel, Binoy K Saikia, Ankur Gogoi, and Surajit Konwer
American Chemical Society (ACS)
Himadree Sarmah, Bitupon Boruah, Munu Borah, Nishant Shukla, Ankur Gogoi, Utpal J. Mahanta, Jayanta K. Sarmah, Lakshi Saikia, and M. Deka
Elsevier BV
Rupkamal Chetia, Shrutipriya Devi, Shreemoyee Bordoloi, Binod Pokhrel, Nishant Shukla, Ankur Gogoi, and Surajit Konwer
Springer Science and Business Media LLC
Nishant Shukla, Akant Vats, Amit Pathak, and Gazi A. Ahmed
American Chemical Society (ACS)
Nishant Shukla, Pawan Chetri, and Gazi A. Ahmed
Springer Science and Business Media LLC
Nishant Shukla, Pawan Chetri, and Gazi A Ahmed
IOP Publishing
Abstract A successful preparation of carbon coated (CC- SnO2)and uncoated (UC- SnO2) nanoscale SnO2 is achieved via cost-effective physicochemical method employing polyvinyl alcohol (PVA) as the source of carbon. The idea of coating with carbon is to reduce agglomeration and investigate single particle properties. The resulting phase compositions of UC- and CC- SnO2 is characterized by XRD, Raman, TEM, UV–vis, photoluminescence, dielectric- spectroscopy and conductivity measurement. The carbon coated SnO2 finds advancement in its characteristic properties with versatility, like phase and material stability, increase in activation energy and reduction in agglomeration formation. The prepared CC- SnO2 suppresses the natural mode of vibration of SnO2 nanoparticles. Dielectric spectroscopy measurements show that the dielectric loss is more in UC- SnO2 than CC- SnO2 at all frequencies. The existence of carbon coating on SnO2 nanoparticles and its phenomenal characterizing behavior was verified by first- principles approach with investigation of the structural and electronic properties of SnO2, PVA, and their merged structures. A model has been used to observe the surface interaction effect between SnO2 and PVA for a defined geometry elucidated through variations in the density of states results. The reported method and investigations approached through the integrated technique provides conspicuous enrichment to the field.
Nishant Shukla, Pawan Chetri, and Gazi A. Ahmed
Trans Tech Publications, Ltd.
Antimony Telluride (Sb2Te3), a topological insulator is a layered semiconductor material with hexagonal unit cell similar to graphene. The characteristic presence of their conducting edges or surfaces with self-induced protection, promise for remarkable future applications. In this exertion based on the first principle approach, the structural and electronic properties of Sb2Te3 compound have been investigated for both without and with spin orbit coupling (SOC). Lattice structure, band structure, total density of states (TDOS), partial density of states (PDOS), energy bands of surface states are determined within Quantum Espresso simulation package. Furthermore, dispersive interactions, induced due to the presence of van-der-Waals forces have also been taken care of. The newly developed method of DFT-D3 has been incorporated for accurate predictions of band gap and lattice parameters. A proficient model, TheSlabModel, has been used to observe the presence of single Dirac cone on the surface. To our knowledge, our theoretical investigations are valid and are found to be congruous with the observed data.
Nishant Shukla, Pawan Chetri, and Gazi A. Ahmed
Springer Science and Business Media LLC
Nishant Shukla and Gazi A. Ahmed
Elsevier BV