Mitra A.K. – TechConnect Briefs

Enhancement in photoluminescence emission in the UV-visible region from chemically synthesized silver doped ZnS nanoparticles

Sarkar R., Kumbhakar P., Mitra A.K., NIT Durgapur India, IN

Nanoparticles of ZnS:Ag doped with Ag+ (0.5%) and capped with polyvinyl pyrolidone (PVP) have been synthesized by chemical co-precipitation method. The measured particle size is ~2.5 nm which has been obtained from the analyses of [...]

Visible Photoluminescence Emission from Chemically Synthesized MWCNT/TiO2 Hybrid Nanostructure

Paul R., Kumbhakar P., Mitra A.K., National Institute of Technology, Durgapur, IN

We report here a simple chemical precipitation process to synthesize a heterostructure of multi-walled carbon nanotubes (MWCNTs) and TiO2 (titania) nanoparticles of average size 3.5 nm. The hybrid structure has been characterized by high resolution [...]

Role of interlayer interaction in the mechanical properties of a multi- walled carbon nanotube and a single-walled carbon nanotube bundle

Talukdar K., Mitra A.K., National Institute of Technology, Durgapur, IN

Molecular dynamics simulation is performed on a SWCNT bundle made up of four (5, 5) SWCNTs and on an armchair MWCNT taking Brenner’s 2nd generation reactive empirical bond order potential. The interlayer interaction in the [...]

Synthesis and optical properties of L-cystine capped ZnS:Co nanoparticles

Kumbhakar P., Sarkar R., Mitra A.K., National Institute of Technology, Durgapur, IN

IV-VI nanocrystalline semiconductors are of great interest for its applications in light emitting devices, fluorescence biosensor, and solar cells [1-4]. Here, we have reported synthesis of cobalt doped ZnS (ZnS:Co) nanoparticles capped with L-cystine by [...]

Violet-Blue Emission From TiO2/SWCNT Hybrid Structure Synthesized by a Simple Chemical Route

Paul R., Kumbhakar P., Mitra A.K., NIT Durgapur India, IN

Using a lucid wet chemical process under room temperature, titania nanocrystallites of average size 5 nm have been adhered to the surfaces of SWCNT bundles. The hybrid structure has been characterized by high resolution transmission [...]

Effect of Position and Orientation of Stone-Wales Defects on the Fracture Behavior of a Zigzag Single-Walled Carbon Nanotube

Talukdar K., Mitra A.K., NIT Durgapur India, IN

A (10, 0) SWCNT of length 42.59 Å and aspect ratio 10.9 is studied by Molecular Dynamics (MD) simulation both in perfect condition and also with one, two, three or four SW defects introduced into [...]

The role of Stone-Wales defects in the mechanical behavior of a zig-zag SWNT

Talukdar K., Mitra A.K., National Institute Of Technology, IN

A (5,0) SWNT with aspect ratio of 10.87 is simulated considering two different potentials, viz. Brenner’s Bond Order potential and Tight Binding potential. At first the Young’s modulus, failure stress and the maximum strain value [...]

Modification of photoluminescence characteristics of single wall carbon nanotubes by ZnS intercalation

Paul R., Kumbhakar P., Mitra A.K., National Institute Of Technology, IN

Commercially available SWNT of >95% purity was purified by high temperature oxidation and acid treatment. By a simple chemical wet process, SWNT samples were intercalated with as-prepared ZnS nanoparticles. The dried samples were dispersed in [...]