Kumbhakar P. – 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 [...]

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 [...]

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 [...]