G.B.Liu
,
W.L.Wang
,
C.G.Hu
,
K.J.Liao
,
Q.Feng
,
L.H.Feng
金属学报(英文版)
The effect of annealing treatment on the structure of CdS films was investigated.The cadmium sulfide thin films were prepared by chemical bath deposition, and were annealed at nitrogen atmosphere at different temperatures. The films were charac-terized by SEM and XPS (X-ray photoelectron spectroscopy). X-ray photoelectron spectroscopy was used to examine the chemical states on the CdS films surface. It was found that thermal annealing could produce large grains of CdS thin films, remove the air contamination and reduce the oxygen content on the CdS films surface. Therefore,the CdS films changed more uniform and smoother surface after thermal annealing.
关键词:
XPS
,
null
,
null
Y.B.Zhu
,
W.L.Wang
,
C.G.Hu
金属学报(英文版)
The influences of density and dimension of carbon nanotubes on their electron emis-sion from arrays are studied. The tip electric field of nanotubes, electric field enhance-ment factor, and optimum nanotube density are expressed by analytic equations. The theoretical analyses show that the field enhancement factor is sensitive to nanotube density, and can be sharply improved at a specific and optimum density. Some exper-iments have demonstrated these. Owning to electrostatic screening effect, the length of carbon nanotubes has little effect on their emission. A uniformly-distributed carbon nanotube array model is set up, and applied to analysis of carbon nanotube arrays.The results obtained here are in good agreement with the experimental data.
关键词:
carbon nanotube array
,
null
,
null
