Surface morphology and step fluctuations on Ag nanowires

C. G. Tao; W. G. Cullen; E. D. Williams; S. E. Hunyadi; C. J. Murphy

doi:10.1016/j.susc.2007.08.023

Surface morphology and step fluctuations on Ag nanowires

C. G. Tao, W. G. Cullen, E. D. Williams, S. E. Hunyadi, C. J. Murphy

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

Abstract

Silver nanowires fabricated using a wet-chemical synthesis have been characterized in UHV using scanning tunneling microscopy. The nanowires have a faceted structure with a high density of steps at the facet boundaries. Monolayer height steps are easily imaged, and have measurable temporal fluctuations at room temperature. Measurement of the step time correlation functions shows that the steps fluctuate via periphery diffusion, with a hopping time constant of 0.10-0.24 s. The symmetry of islands on the facets and the quantitative step characteristics are both consistent with (1 0 0) oriented facets, in agreement with previous TEM characterization.

Original language	English (US)
Pages (from-to)	4939-4943
Number of pages	5
Journal	Surface Science
Volume	601
Issue number	21
DOIs	https://doi.org/10.1016/j.susc.2007.08.023
State	Published - Nov 1 2007
Externally published	Yes

Keywords

Adatom
Equilibrium thermodynamics and statistical mechanics
Nanostructures
Scanning tunneling microscopy
Steps
Surface diffusion
Surface structure, morphology, roughness and topography

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Condensed Matter Physics
Surfaces and Interfaces

Online availability

10.1016/j.susc.2007.08.023

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title = "Surface morphology and step fluctuations on Ag nanowires",

abstract = "Silver nanowires fabricated using a wet-chemical synthesis have been characterized in UHV using scanning tunneling microscopy. The nanowires have a faceted structure with a high density of steps at the facet boundaries. Monolayer height steps are easily imaged, and have measurable temporal fluctuations at room temperature. Measurement of the step time correlation functions shows that the steps fluctuate via periphery diffusion, with a hopping time constant of 0.10-0.24 s. The symmetry of islands on the facets and the quantitative step characteristics are both consistent with (1 0 0) oriented facets, in agreement with previous TEM characterization.",

keywords = "Adatom, Equilibrium thermodynamics and statistical mechanics, Nanostructures, Scanning tunneling microscopy, Steps, Surface diffusion, Surface structure, morphology, roughness and topography",

author = "Tao, {C. G.} and Cullen, {W. G.} and Williams, {E. D.} and Hunyadi, {S. E.} and Murphy, {C. J.}",

note = "Funding Information: This work has been supported by the UMD NSF-MRSEC and its shared facilities under Grant # DMR 05-20471. C.J.M. also thanks the NSF for support for this work.",

year = "2007",

month = nov,

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doi = "10.1016/j.susc.2007.08.023",

language = "English (US)",

volume = "601",

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journal = "Surface Science",

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number = "21",

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T1 - Surface morphology and step fluctuations on Ag nanowires

AU - Tao, C. G.

AU - Cullen, W. G.

AU - Williams, E. D.

AU - Hunyadi, S. E.

AU - Murphy, C. J.

N1 - Funding Information: This work has been supported by the UMD NSF-MRSEC and its shared facilities under Grant # DMR 05-20471. C.J.M. also thanks the NSF for support for this work.

PY - 2007/11/1

Y1 - 2007/11/1

N2 - Silver nanowires fabricated using a wet-chemical synthesis have been characterized in UHV using scanning tunneling microscopy. The nanowires have a faceted structure with a high density of steps at the facet boundaries. Monolayer height steps are easily imaged, and have measurable temporal fluctuations at room temperature. Measurement of the step time correlation functions shows that the steps fluctuate via periphery diffusion, with a hopping time constant of 0.10-0.24 s. The symmetry of islands on the facets and the quantitative step characteristics are both consistent with (1 0 0) oriented facets, in agreement with previous TEM characterization.

AB - Silver nanowires fabricated using a wet-chemical synthesis have been characterized in UHV using scanning tunneling microscopy. The nanowires have a faceted structure with a high density of steps at the facet boundaries. Monolayer height steps are easily imaged, and have measurable temporal fluctuations at room temperature. Measurement of the step time correlation functions shows that the steps fluctuate via periphery diffusion, with a hopping time constant of 0.10-0.24 s. The symmetry of islands on the facets and the quantitative step characteristics are both consistent with (1 0 0) oriented facets, in agreement with previous TEM characterization.

KW - Adatom

KW - Equilibrium thermodynamics and statistical mechanics

KW - Nanostructures

KW - Scanning tunneling microscopy

KW - Steps

KW - Surface diffusion

KW - Surface structure, morphology, roughness and topography

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DO - 10.1016/j.susc.2007.08.023

M3 - Article

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SN - 0039-6028

VL - 601

SP - 4939

EP - 4943

JO - Surface Science

JF - Surface Science

IS - 21

ER -

Surface morphology and step fluctuations on Ag nanowires

Abstract

Keywords

ASJC Scopus subject areas

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