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Effect of capping agents on optical and antibacterial properties of cadmium selenide quantum dots

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Abstract

Cadmium selenide quantum dots (CdSe QDs) were synthesized in aqueous phase by the freezing temperature injection technique using different capping agents (viz. thioglycolic acid, 1-thioglycerol, L-cysteine). Absorption spectra of CdSe QDs exhibited a blue shift as compared to its bulk counterpart, which is an indication of quantum confinement effect. The photoluminescence spectra of CdSe QDs confirmed that the particles are poly-dispersed and possess enhanced luminescent property, depending upon the chemical nature of capping agents. The QDs have been characterized by Fourier-transform infrared spectroscopy, atomic absorption spectroscopy and transmission electron microscopy. Further, antimicrobial activity of as-prepared QDs has also been investigated using the disk diffusion method.

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Authors and Affiliations

  1. Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar, 125 001, India

    DEEPIKA, RAKESH DHAR & ATUL KUMAR

  2. Central Scientific Instruments Organization (CSIR–CSIO), Chandigarh, 160 030, India

    SUMAN SINGH

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  1. DEEPIKA
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  2. RAKESH DHAR
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  3. SUMAN SINGH
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  4. ATUL KUMAR
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Correspondence to RAKESH DHAR.

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DEEPIKA, DHAR, R., SINGH, S. et al. Effect of capping agents on optical and antibacterial properties of cadmium selenide quantum dots. Bull Mater Sci 38, 1247–1252 (2015). https://doi.org/10.1007/s12034-015-1006-9

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  • DOI: https://doi.org/10.1007/s12034-015-1006-9

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