Sonochemical synthesis of CdS and CdSe nanowires.
A convenient sonochemical route was developed to fabricate one-dimensional (1D) CdS or CdSe assemblies via a simple template method with two-steps: Firstly, the colloid one dimensional cadmium hydroxide particles were prepared as templates under sonication; then, the colloid particles were converted into 1D CdS or CdSe assemblies via a replacement reaction after the surface nucleation and crystal growth processes. The as-prepared CdS and CdSe nanowires were characterized by XRD, TEM, XPS, and UV-visible Spectroscopy. The effects of the ultrasonic irradiation were discussed. It is believed that the ultrasound irradiation played a positive role in both the assembly of the colloid cadmium hydroxide particles into the 1D structure and the growth of CdSe and CdS nanowires. The effects of pH on the morphologies of the cadmium hydroxide template were also discussed. The band gaps of the as-prepared 1D CdSe and CdS assemblies were calculated to be 3.1 eV and 4.9 eV, respectively, indicating the quantum size effect. The as-prepared products might have potential applications in nanodevices in future.
Jiang
Li-Ping
LP
Key Lab of the Life Analytical Chemistry, School of the Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, PR China.
Xu
Shu
S
Miao
Jian-Jun
JJ
Wang
Hui
H
Zhu
Jun-Jie
JJ
D019187:Cadmium Compounds / Q000737:chemistry*; D003102:Colloids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry; D046529:Microscopy, Electron, Transmission; D053758:Nanoparticles / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods*; D043942:Nanotubes / Q000737:chemistry*; D018036:Selenium Compounds / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D013053:Spectrophotometry; D013440:Sulfides / Q000737:chemistry*; D014465:Ultrasonics; D014466:Ultraviolet Rays
D019187:Cadmium Compounds; D003102:Colloids; D006878:Hydroxides; D018036:Selenium Compounds; D013440:Sulfides; C034939:cadmium sulfide; D012972:Sodium Hydroxide; C031356:hydroxide ion; C058667:cadmium selenide