SURFACE-CHARGE INDUCED ORDERING OF THE AU(111) SURFACE

被引：119

作者：

WANG, J ^{[1
]}

DAVENPORT, AJ ^{[1
]}

ISAACS, HS ^{[1
]}

OCKO, BM ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973

来源：

SCIENCE | 1992年 / 255卷 / 5050期

关键词：

D O I：

10.1126/science.255.5050.1416

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Synchrotron surface x-ray scattering (SXS) studies have been carried out at the Au(111)/electrolyte interface to determine the influence of surface charge on the microscopic arrangement of gold surface atoms. At the electrochemical interface, the surface charge density can be continuously varied by controlling the applied potential. The top layer of gold atoms undergoes a reversible phase transition between the (1 x 1) bulk termination and a (23 x square-root 3) reconstructed phase on changing the electrode potential. In order to differentiate the respective roles of surface charge and adsorbates, studies were carried out in 0.1 M NaF, NaCl, and NaBr solutions. The phase transition occurs at an induced surface charge density of 0.07 +/- 0.02 electron per atom in all three solutions.

引用

页码：1416 / 1418

页数：3

共 28 条

[21] INSITU SURFACE X-RAY-SCATTERING MEASUREMENTS OF ELECTROCHEMICALLY DEPOSITED BI ON AG(111) - STRUCTURE, COMPRESSIBILITY, AND COMPARISON WITH EXSITU LOW-ENERGY ELECTRON-DIFFRACTION MEASUREMENTS [J].