ZnS shell growth on thiol capped CdTe quantum dots using gamma irradiation

S. P. Raju, K. Hareesh, S. Chethan Pai, S. D. Dhole, Ganesh Sanjeev

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


The formation of ZnS shell on 3-Mercaptopropionic acid (MPA) capped CdTe quantum dots (QDs) using gamma radiation has been reported in this study. Hydrothermally synthesized CdTe QDs were exposed to gamma radiation before and after introducing shell source materials (Zn+MPA complex). The gamma rays exposed samples were characterized using UV-Vis spectroscopy, Photoluminescence spectroscopy (PL) and X-Ray Diffraction (XRD) techniques. The redshift in absorption spectra for gamma irradiated samples indicates the formation of bigger nanoparticles as the shell stretched the core size. The shift in the XRD peaks (cubic zinc blade structure) towards higher angle reveals the formation of MPA capped CdTe/ZnS core/shell QDs against gamma radiation. The variation in PL spectra also followed the same redshift corroborating the UV-Vis and XRD results. The increase in PL intensity only after introducing shell source material against gamma radiation clearly confirms ZnS shell saturated the surface dangling bonds by increasing radiative decay mechanism over CdTe core surface.

Original languageEnglish
Title of host publicationDAE Solid State Physics Symposium 2016
EditorsSurendra Singh, Saibal Basu, Shovit Bhattacharya, Amitabh Das
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735415003
Publication statusPublished - 19-05-2017
Event61st DAE Solid State Physics Symposium - Bhubaneswar, Odisha, India
Duration: 26-12-201630-12-2016

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference61st DAE Solid State Physics Symposium
CityBhubaneswar, Odisha

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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