By Topic

Synthesis and characterisation of CdSe nanocrystals using NaHSeO3 as selenium source

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $33
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

8 Author(s)
Xianmei Xu ; School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, People's Republic of China ; Yilin Wang ; Liya Zhou ; Liangliang Wu
more authors

Sodium hydrogen selenite was used as a novel selenium source in the synthesis of 3-mercaptopropionic acid-stabilised cadmium selenide (CdSe) nanocrystals (NCs) in an aqueous medium. The size, crystalline structure and optical properties of these NCs were characterised via high-resolution transmission electron microscopy, X-ray powder diffraction (XRD), ultraviolet-visible light absorption and photoluminescence (PL) spectroscopy. The factors affecting the Se:Cd molar ratio were also discussed. The CdSe NC grains are roughly spherical, and their average size is ~4-5-nm. The XRD patterns of the synthesised CdSe NCs are characteristic of zinc-blended structures. The obtained CdSe NCs exhibit a relatively narrow PL band at a full-width at half-maximum of ~125-44-nm, as well as a high PL peak in the yellow spectral range. The quantum yields of the corresponding CdSe NCs at Cd-to-Se molar ratios of 0.1, 0.2 and 0.3 are 2.38, 3.70 and 9.32%, respectively, indicating the strong dependence of the NC size on the precursor concentration in the period immediately following the precursor injection.

Published in:

IET Micro & Nano Letters  (Volume:7 ,  Issue: 6 )