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纳米铜薄膜氧化反应动力学规律研究 总被引:2,自引:0,他引:2
研究了140 ℃下纳米尺度Cu薄膜的氧化行为. 采用真空蒸发法以不同沉积速率制备一系列Cu薄膜, 利用原子力显微镜(AFM)观察其微观形貌, 选取形貌良好的Cu薄膜样品. 采用方块电阻和透射光谱两种方法为表征手段, 测量16~22 nm范围内不同厚度Cu薄膜在140 ℃下完全氧化所需要的时间, 得到了Cu薄膜氧化反应的动力学曲线, 并利用X射线衍射(XRD)分析了氧化产物的晶相结构和成分. 结果表明, 纳米尺度下Cu薄膜在140 ℃下氧化反应的动力学表征结果满足特殊的反对数生长规律, 反应产物为Cu2O. 相似文献
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The dependence of polarization fatigue on crystallinity of vinylidene fluoride and trifluoroethylene copolymer films was studied.Experimental data indicated that the higher the crystallinity of the film was,the slower the fatigue rate of the film became.A possible explanation was put forward,and it was regarded that the space charges,trapped at the boundaries of crystallites and/or captured by the defects lying both in amorphous and crystalline phases,should make the major contribution to polarization fa... 相似文献
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Fabrication of grating-like polystyrene latex monolayer structure as three-dimensional calibration standards for scanning probe microscope 下载免费PDF全文
This paper illuminates the preparation of grating-like polystyrene
latex monolayer structure, which can minimize the effects of the
size deviation of spheres and the defect transfer on the accuracy as
calibration samples for microscopes. The latex films are grown on
freshly cleaved mica substrates by vertical deposition method. The
concentration dependence of the structure and the topography of
latex films is characterized by optical microscope,
ultraviolet--visible transmission spectrum and scanning probe
microscope. The origination of such a grating-like structure is also
discussed. 相似文献
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Polarization fatigue in poly(vinylidene fluoride (78%)-trifluoroethylene (22%)) ferroelectric thin films: a pulse train study 下载免费PDF全文
This paper investigates the influences of polarization fatigue on remanent polarization and switching time by pulse train measurements in ferroelectric poly(vinylidene fluoride (78%) and trifluoroethylene (22%)) thin films. Fatigue was carried out by a series of bipolar switching pulses with constant pulse width (on-time) and various interval times between pulses (off-time). The experimental observations indicated that the off-time period showed no obvious influence on fatigue rate and the switching time increased with the increase of fatigue cycles. The origination of these phenomena was discussed according to the charge injection model. 相似文献
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