New route for preparation of luminescent mercaptoethanoate capped cadmium selenide quantum dots

Bulletin of materials science

Shaukatali N Inamdar³  Manoj E Wankhede³  Santosh K Haram³  Sulabha K Kulkarni²  Renu Pasricha¹  Aniket R Thete³  Aparna Deshpande² 

[1] National Chemical Laboratory, Pune 411 008, India$$National Chemical Laboratory, Pune 411 008, IndiaNational Chemical Laboratory, Pune 411 008, India$$;Department of Physics, DST Centre for Nanoscience, University of Pune, Pune 411 007, India$$Department of Physics, DST Centre for Nanoscience, University of Pune, Pune 411 007, IndiaDepartment of Physics, DST Centre for Nanoscience, University of Pune, Pune 411 007, India$$;Department of Chemistry, DST Centre for Nanoscience, University of Pune, Pune 411 007, India$$Department of Chemistry, DST Centre for Nanoscience, University of Pune, Pune 411 007, IndiaDepartment of Chemistry, DST Centre for Nanoscience, University of Pune, Pune 411 007, India$$

关键词: Semiconductor quantum dots;    chalcogenides;    chemical synthesis;    photoluminescence.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

We report a synthesis of cadmium selenide quantum dots (Q-CdSe) by refluxing a mixture of cadmium acetate, selenium powder, sodium sulfite and 2-mercaptoethanol in N,N�?-dimethyl formamide (DMF)/water solution. X-ray and electron diffractions suggest the formation of hexagonal phase of size quantized CdSe. Based on TEM analysis, the formation of nanoparticles with an average diameter of 3.5 ± 0.5 nm is inferred. Their sols in DMF and dimethyl sulphoxide (DMSO) gave characteristic absorption peaks at 300 nm and 327 nm, which is attributed to the formation of high quality, size quantized CdSe particles. Extracted particles from the sol were readily redispersed in DMF and DMSO, which were diluted further with water without losing their optical and colloidal properties. FTIR spectroscopy suggested the formation of 2-mercaptoethanol thiolate on the particle surface, with free �?�OH groups available for linkage. Sols in DMSO and their solutions in water displayed an intense photoluminescence (PL).

【 授权许可】

Unknown