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

Bulletin of materials science

Suman Singh³  Deepika¹  Rakesh Dhar²  Atul Kumar¹ 

[1] Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, India$$Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, IndiaDepartment of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, India$$;Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, India$$Central Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, India$$Department of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, IndiaDepartment of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, India$$Central Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, India$$Central Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, IndiaDepartment of Applied Physics, Guru Jambheshwar University of Science and Technology, Hisar 125 001, India$$Central Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, India$$;Central Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, India$$Central Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, IndiaCentral Scientific Instruments Organization (CSIRâ€�?�CSIO), Chandigarh 160 030, India$$

关键词: Capping agents;    quantum confinement;    poly-dispersed;    luminescent.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

Unknown