Fabrication Of Water-Soluble L-cysteine Capped CdTe Quantum Dots In Zeolite Confinement

Erandi Munasinghe¹, Yohan Jayawardane¹, Anuradha Rajapakshe¹, Athula Bandara²,
Rohan Weerasooriya¹, Lakmal Jayarathna^1*

¹Environmental Science Research Program, National Institute of Fundamental Studies, Kandy, 20000, (SRI LANKA)
²Department of Chemistry, University of Peradeniya, Peradeniya, 20500, (SRI LANKA)

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ABSTRACT – DOI: https://dx.doi.org/10.47204/EMSR.3.1.2021.039-044

Quantum dots (QDs) are nano crystals with tunable energy levels with respect to size, shape and charge potential. Presently, the channel structure of zeolites, traditionally used as an adsorbent, was used as the substrate for the fabrication of CdTe QDs under inert environments. The unique structure of zeolites is used as reaction chambers for the fabrication of uniform size QDs. We successfully fabricated L-cysteine capped, highly fluorescent CdTe QDs on zeolite substrate at Cd²⁺: Te^2-: L-Cysteine molar ratio as 1: 1: 19. Newly fabricated CdTe QDs were characterized by FTIR, XRD and SEM. The newly fabricated CdTe QDs has a great potential in biomedical applications in transporting therapeutic and diagnostic agents.