ToF-secondary ion mass-spectrometric study of copper deposition and stripping on directly heated screen-printed gold electrodes
ToF-secondary ion mass-spectrometric study of copper deposition and stripping on directly heated screen-printed gold electrodes
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直热丝网印刷金电极上铜沉积和剥离的 ToF 二次离子质谱研究
DOI：
10.1007/s10008-013-2083-6
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发表时间：
2013
影响因子：
2.5
通讯作者：
G.-U. Flechsig
中科院分区：
文献类型：
--
作者：
A. Hafez;U. Koch;G.-U. Flechsig
报道了一种新型的直热式金电极。所有电极，包括直接加热的金环电极、银伪参比电极和碳对电极，都被丝网印刷在陶瓷氧化铝衬底上。通过使用外部或集成参比电极的电位法研究了热行为。在较高的沉积温度下，铜的溶出伏安信号有较大改善。二次离子质谱仪(TOF-SIMS)研究表明，在二次离子质谱仪(SIMS)分析过程中，由于离子轰击的结果，在金电极表面可以发现不同的负离子铜配合物物种，如铜−、CuCl2−和CuCl2−。SIMS表面成像使用表面上的精细聚焦离子束，使我们能够获得所分析样品的离子图像(化学图)。在室温(23℃)和60℃下沉积铜后，对金环电极进行了SIMS深度剖面分析。深度剖面研究使用了CuCl2−离子，因为它是其他观察物种中强度最高的。表面光谱分析、表面成像和深度剖面分析表明，在沉积过程中，随着电极温度的升高，金环电极上铜物种的沉积量增加。因此，溶液中氯化物的存在将阻碍铜(0)的欠电位沉积，并导致溶出峰的模糊和分辨。
We report about a new kind of directly heated gold electrode. All electrodes including a directly heated gold loop electrode, a Ag pseudo reference, and a carbon counter electrode have been screen-printed on a ceramic alumina substrate. Thermal behaviour was studied by potentiometry using either an external or the integrated reference electrode. Stripping voltammetric copper signals were greatly improved at elevated deposition temperature. Secondary ion mass spectrometric studies (ToF-SIMS) revealed that different negative ionic species of copper complexes can be found on the gold electrode surface as a result of ion bombardment during SIMS analysis like Cu−, CuCl−and CuCl2−. SIMS surface imaging using a fine focussed ion beam over the surface allowed us to obtain ion images (chemical maps) of the analyzed sample. SIMS depth profile analysis of the gold loop electrode was performed after copper deposition at room temperature (23 °C) and at 60 °C. CuCl2−ion was used for the depth profile studies as it has shown the highest intensity among other observed species. Surface spectroscopic analysis, surface imaging and depth profile analysis have shown that the amount of deposited copper species on the gold loop electrode was increased upon increasing electrode temperature during the deposition step. Therefore, the presence of chloride in the solution will hinder underpotential deposition of Cu(0) and lead to badly defined and resolved stripping peaks.
用于灵敏电化学生物传感器的金电极的无模板电纳米结构
影响因子：
3
作者：
F. Wachholz;H. Duwensee;Ralf Schmidt;M. Zwanzig;J. Gimsa;S. Fiedler;G. Flechsig
通讯作者：
G. Flechsig
利用 ToF-SIMS 研究金上链烷硫醇自组装单层的二次簇离子发射
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
M. Schröder;S. Sohn;H. Arlinghaus
通讯作者：
H. Arlinghaus