排序方式: 共有14条查询结果,搜索用时 31 毫秒
1.
Optical Properties of ZnFe2O4—SiO2 Granular Films Prepared by Radio—Frequency Magnetron Sputtering 下载免费PDF全文
We report on the optical properties of ZnFe2O4-SiO2 granular films prepared on quartz substrates by the radio-frequency magnetron sputtering method.Post-annealing was performed at different temperatures under flow oxygen atmosphere.The morphology and Structures of ZnFe2O4 nanoparticles were characterized by x-ray different line types in the optical absorption curves of ZnFe2O4-SiO2 granular films.The critical transition of line types occurs when ZnFe2O4 changes from amorphous to crystalline,and the transition temperature increases with the increasing content of ZnFe2O4.There is an obvious blueshift of the optical absorption edge of the granular films with the decreasing annealing temperature. 相似文献
2.
Pulsed electrodeposited technique is applied to fabricate ZnTe nanowire arrays with different diameters into the anodic alumina membrane in citric acid solution. The x-ray powder diffraction, scanning electron microscopy and transmission electron microscopy indicate that the high ordered, uniform and single-crystalline nanowires have been fabricated. The optical absorption spectra of the nanowire array show that the optical absorption band edge of the ZnTe nanowire array exhibit a blue shift compared with that of bulk ZnTe, and the nonlinear current-voltage characteristic is observed. 相似文献
3.
4.
5.
6.
7.
8.
研究了VO2(M)纳米棒的金属绝缘体相变(MIT)行为.在VO2(M)纳米棒的DSC分析曲线上发现了两个MIT,分别位于低温和高温区.低温MIT总是伴随出现VO2(B)纳米棒,而独立的高温MIT出现在纯VO2(M)纳米棒.分析和讨论了这两个MIT的机制. 相似文献
9.
电沉积二氧化钛功能薄膜的制备与组织转变研究 总被引:2,自引:0,他引:2
采用直流电沉积方法,在石墨板上成功制备了半导体二氧化钛功能薄膜前驱体,分析讨论了电沉积过程中实验参数对TiO2前驱体成膜的影响,获得了制备二氧化钛膜最佳工艺参数.TiO2前驱体沉积速率随着电流密度的增大而增加,为了保证薄膜质量,将电流密度控制在5~45mA/cm2之间;溶液浓度对沉积速率也有影响,当溶液中TiCl4:H2O2=1:2时沉积速率最大;最佳沉积温度为5-10℃.运用差热分析、XRD相结构分析和SEM等手段,研究了该前驱体到锐钛矿相(anatase)和金红石相(rutile)二氧化钛的组织相转变过程,300℃热处理得到锐钛矿相的二氧化钛,650℃热处理后出现金红石相. 相似文献
10.
Amorphous TiO2 thin films and ZnFe2O4 doped TiO2 composite films were deposited by radio frequency magnetron sputtering. The effect of ZnFe2O4 doping on the optical properties of TiO2 thin films was reported. Our results show that the absorption edge of TiO2 thin films and composite films exhibits a blue shift with decreasing annealing temperature. The absorption edge of composite films has moved to visible spectrum range, and a very large red shift occurs in comparison with TiO2 thin film. An enhanced photoluminescence in ZnFe2O4 doped anatase TiO2 thin film at room temperature. 相似文献