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Cu在HOPG上电化学沉积的原子分辨ECSTM现场观测 总被引:1,自引:0,他引:1
电化学扫描隧道显微镜(ECSTM)因其能提供真实空间的原子分辨图象而成为现场研究电极表面结构的最强有力的手段之一。近来,欠电位沉积(UPD)得到日益广泛的研究,人们观察到了Cu在Au(111)和Pt(111)上的UPD层的原子结构。而在金属体相沉积的ECSTM研究中所得图象的分辨率较低。我们用ECSTM在控电位下对Cu在高序石墨(HOPG)上的 相似文献
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化学力显微镜对自组装单分子膜的力滴定研究 总被引:4,自引:0,他引:4
The concept of force titration was firstly proposed based on the technique of Chemical Force Microscopy (CFM). Self-Assembled Monolayer (SAM) on substrate surface can be titrated with buffer solutions at a nanometer scale by measuring the adhesion force between the SAM-modified substrate and probe tip. The plot of adhesion force vs pH value was termed as force titration curve. As an example, the titration behavior of w-mercaptoundecanoic acid monolayer on gold has been studied. It was found that there is a big hump around pH 5~6 in its force titration curve. Taking the contact angle titration result together, an interaction model for the monolayer was suggested from the chemical hysteresis point of view. 相似文献
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导电高聚物是发展迅速且应用广泛的重要电极材料,由于大多数电化学反应发生在导电高聚物/金属和导电高聚物/溶液界面,如果能获得其界面结构的信息,将对导电高聚物表面所发生的电化学反应以及导电高聚物的聚合、降解的机理研究有极大的帮助。但无论是常规电化学技术还是一般光谱电化学技术都难于得到有关界面结构的信息,因为通常情况下较强的导电高聚物膜本体的信号将“淹没”来自界面的信号。所幸的是表面增强拉曼散射(SER 相似文献
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