کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364417 | 1388316 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical behaviour of gold modified with contaminated TMP amine adlayers studied by STM, CV, EPR
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Scanning tunnelling microscopy (STM), cyclic voltammetry (CV) and electron paramagnetic resonance spectroscopy (EPR) were used to investigate the influence of the TMP amine derivative on Au (1Â 1Â 1). The STM results show that the gold surface covered by the adlayer of the TMP derivative is easily modified (holes formation) after increasing the bias voltage to 0.5Â V. The CV and EPR results show the electrochemical origin of observed STM topography changes. It is suggested that TMP could be oxidized to the nitroxyl TEMPO radical which adsorbs on Au in the form of an oxoammonium cation. Such an oxoammonium cation at the potential of 0.5Â V forms a permanent complex of gold and the nitroxyl radical which could be easily desorbed during STM imaging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 255, Issue 7, 15 January 2009, Pages 3946-3952
Journal: Applied Surface Science - Volume 255, Issue 7, 15 January 2009, Pages 3946-3952
نویسندگان
P. Krukowski, P.J. Kowalczyk, P. Krzyczmonik, W. Olejniczak, Z. Klusek, M. Puchalski, K. Gwozdzinski,