Zn effect on STM imaging of brass surfaces

Frédéric Wiame; Mazharul M. Islam; Bekir Salgin; Jolanta ͆wiatowska; Dominique Costa; Boubakar Diawara; Vincent Maurice; Philippe Marcus

doi:10.1016/j.susc.2015.10.025

Zn effect on STM imaging of brass surfaces

Frédéric Wiame, Mazharul M. Islam, Bekir Salgin, Jolanta ͆wiatowska, Dominique Costa, Boubakar Diawara, Vincent Maurice, Philippe Marcus

Department of Chemistry

Institut de Recherche de Chimie Paris

Research output: Contribution to journal › Article › peer-review

8 Citations (SciVal)

Abstract

The surface of brass has been characterized by combined experimental and theoretical approaches. The experimental scanning tunneling microscopy study performed on a Cu_0.7Zn_0.3(111) surface at room temperature showed terraces of up to several tens of nanometers in width, separated by monoatomic steps. Depending on the tunneling conditions, a disordered pattern or a sharp atomically-resolved hexagonal lattice was observed. The disordered pattern is attributed to the superposition of Friedel oscillations at the surface induced by the presence of Zn atoms. Comparison of simulated images, based on a simple model of randomly distributed point defects, shows a good agreement with experimental results. At atomic resolution, a chemical contrast has been demonstrated between Zn and Cu atoms at the surface showing the random distribution of isolated Zn atoms into the hexagonal lattice.

Original language	English
Pages (from-to)	148-152
Number of pages	5
Journal	Surface Science
Volume	644
Early online date	24 Oct 2015
DOIs	https://doi.org/10.1016/j.susc.2015.10.025
Publication status	Published - 1 Feb 2016

Keywords

Chemical contrast
Density functional theory
Friedel oscillations
Scanning tunneling microscopy
Surface local density of states

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.susc.2015.10.025

Cite this

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title = "Zn effect on STM imaging of brass surfaces",

abstract = "The surface of brass has been characterized by combined experimental and theoretical approaches. The experimental scanning tunneling microscopy study performed on a Cu0.7Zn0.3(111) surface at room temperature showed terraces of up to several tens of nanometers in width, separated by monoatomic steps. Depending on the tunneling conditions, a disordered pattern or a sharp atomically-resolved hexagonal lattice was observed. The disordered pattern is attributed to the superposition of Friedel oscillations at the surface induced by the presence of Zn atoms. Comparison of simulated images, based on a simple model of randomly distributed point defects, shows a good agreement with experimental results. At atomic resolution, a chemical contrast has been demonstrated between Zn and Cu atoms at the surface showing the random distribution of isolated Zn atoms into the hexagonal lattice.",

keywords = "Chemical contrast, Density functional theory, Friedel oscillations, Scanning tunneling microscopy, Surface local density of states",

author = "Fr{\'e}d{\'e}ric Wiame and Islam, {Mazharul M.} and Bekir Salgin and Jolanta ͆wiatowska and Dominique Costa and Boubakar Diawara and Vincent Maurice and Philippe Marcus",

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journal = "Surface Science",

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T1 - Zn effect on STM imaging of brass surfaces

AU - Wiame, Frédéric

AU - Islam, Mazharul M.

AU - Salgin, Bekir

AU - ͆wiatowska, Jolanta

AU - Costa, Dominique

AU - Diawara, Boubakar

AU - Maurice, Vincent

AU - Marcus, Philippe

PY - 2016/2/1

Y1 - 2016/2/1

N2 - The surface of brass has been characterized by combined experimental and theoretical approaches. The experimental scanning tunneling microscopy study performed on a Cu0.7Zn0.3(111) surface at room temperature showed terraces of up to several tens of nanometers in width, separated by monoatomic steps. Depending on the tunneling conditions, a disordered pattern or a sharp atomically-resolved hexagonal lattice was observed. The disordered pattern is attributed to the superposition of Friedel oscillations at the surface induced by the presence of Zn atoms. Comparison of simulated images, based on a simple model of randomly distributed point defects, shows a good agreement with experimental results. At atomic resolution, a chemical contrast has been demonstrated between Zn and Cu atoms at the surface showing the random distribution of isolated Zn atoms into the hexagonal lattice.

AB - The surface of brass has been characterized by combined experimental and theoretical approaches. The experimental scanning tunneling microscopy study performed on a Cu0.7Zn0.3(111) surface at room temperature showed terraces of up to several tens of nanometers in width, separated by monoatomic steps. Depending on the tunneling conditions, a disordered pattern or a sharp atomically-resolved hexagonal lattice was observed. The disordered pattern is attributed to the superposition of Friedel oscillations at the surface induced by the presence of Zn atoms. Comparison of simulated images, based on a simple model of randomly distributed point defects, shows a good agreement with experimental results. At atomic resolution, a chemical contrast has been demonstrated between Zn and Cu atoms at the surface showing the random distribution of isolated Zn atoms into the hexagonal lattice.

KW - Chemical contrast

KW - Density functional theory

KW - Friedel oscillations

KW - Scanning tunneling microscopy

KW - Surface local density of states

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DO - 10.1016/j.susc.2015.10.025

M3 - Article

AN - SCOPUS:84946235484

SN - 0039-6028

VL - 644

SP - 148

EP - 152

JO - Surface Science

JF - Surface Science

ER -

Zn effect on STM imaging of brass surfaces

Abstract

Keywords

ASJC Scopus subject areas

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