Open AccessMorphology control of CdSe nanocrystallines
Author(s) -
Z. M. Cui,
Chengjun Dong,
Y. L. Li,
Q. J. Zhang
Publication year - 2022
Publication title -
chalcogenide letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.234
H-Index - 30
eISSN - 1841-4834
pISSN - 1584-8663
DOI - 10.15251/cl.2022.193.197
Subject(s) - materials science , crystallization , transmission electron microscopy , chemical engineering , bamboo , nanotechnology , microemulsion , fluorescence , nanocrystal , nanoparticle , carbon nanotube , composite material , optics , pulmonary surfactant , physics , engineering
CdSe nanocrystallines with different micromorphology were synthesized by inverse microemulsion method. X-ray diffraction and transmission electron microscopy were used to characterize the micromorphology, phase and ingredient compositions of nanocrystallines. The results indicate that nanosphere, necklace-shaped and bamboo-likeCdSe nanocrystals were successfully prepared. The bamboo- like nanotubes have the best crystallization performance. The red shift of the fluorescence peak can be observed clearly, and bamboo-shaped nanotubes have stronger fluorescence emission. Detailed study on the formation of bamboo-like nanotubes was performed. The mechanism is as follows: the difference of the bound water content at the interface and the free water content in the water core leads to the density difference between outer layer and the center. The diffusion of Se2- and Cd2+induces hollow structure of CdSe nanospheres. Due to the small size effect, hollow nanospheres grow into necklace-shaped and bamboo-structure finally