DETAILED INSITU SCANNING TUNNELING MICROSCOPY OF SINGLE-CRYSTAL PLANES OF GOLD(111) IN AQUEOUS-SOLUTIONS

被引：150

作者：

HONBO, H ^{[1
]}

SUGAWARA, S ^{[1
]}

ITAYA, K ^{[1
]}

机构：

[1] TOHOKU UNIV,FAC ENGN,DEPT ENGN SCI,SENDAI,MIYAGI 980,JAPAN

来源：

ANALYTICAL CHEMISTRY | 1990年 / 62卷 / 22期

关键词：

D O I：

10.1021/ac00221a003

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

An in situ electrochemical scanning tunneling microscope (ESTM) was applied to a gold(111) surface with atomically flat terraces In aqueous perchloric acid solutions. The pits, a single layer deep, were formed during the electrochemical reduction of oxide layers with higher oxidation states. The surface diffusion of gold atoms In a “pure” HCIO4 solution was quite slow and comparable to that observed in ultrahigh vacuum (UHV) reported In the previous literature. An electrochemical dissolution of gold was Investigated In a HCI04 solution in the presence of chloride ion. Strongly adsorbed chloride ions on gold(111) remarkably enhanced the surface diffusion of gold. © 1990, American Chemical Society. All rights reserved.

引用

页码：2424 / 2429

页数：6

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