One solvent, one pot and free capping ligands: Synthesis of alloyed multipod-branched Cd(x)Zn(1-)(x)S nanocrystals.
The solvent ethanolamine with the assistance of cationic doping has been applied to synthesize alloyed multipod-branched Cd(x)Zn(1-)(x)S (0<x<1) nanocrystals through a simple solvothermal route. During the growth of the alloyed multipod-branched nanocrystals, for one thing, the cationic doping enlarges the energy difference between wurtzite and zinc-blende phases; for another thing, the -OH groups of ethanolamine favor the thorough alloying effects and the formation of the zinc-blende-structured seeds, while the -NH(2) groups facilitate the subsequent preferential growth of the wurtzite-phased arms. The composition x of the alloyed multipod-branched Cd(x)Zn(1-)(x)S nanocrystals can be facilely tuned by Cd/Zn initial molar ratios. Furthermore, the absorption edges (corresponding to optical band gaps E(g)) and the near-band-edge emission peaks are varied with the doping Cd(2+) content x. It is reasonable for us to believe that ethanolamine can also be employed to fabricate other alloyed multipod-branched nanocrystals such as CdS(x)Se(1-)(x), CdSe(x)Te(1-)(x) and CdS(x)Te(1-)(x).
He
Xiaobo
X
State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, People's Republic of China.
Gao
Lian
L