Dynamic breaking of a single gold bond

Ilya V.  Pobelov; Kasper Primdal Lauritzen; Koji  Yoshida; Anders Sjølund Jensen; Gábor  Mészáros; Karsten W. Jacobsen; Mikkel Strange; Thomas Wandlowski; Gemma C. Solomon

doi:10.1038/ncomms15931

Dynamic breaking of a single gold bond

Ilya V. Pobelov, Kasper Primdal Lauritzen, Koji Yoshida, Anders Sjølund Jensen, Gábor Mészáros, Karsten W. Jacobsen, Mikkel Strange, Thomas Wandlowski, Gemma C. Solomon

Department of Chemistry

13 Citations (Scopus)

117 Downloads (Pure)

Abstract

While one might assume that the force to break a chemical bond gives a measure of the bond strength, this intuition is misleading. If the force is loaded slowly, thermal fluctuations may break the bond before it is maximally stretched, and the breaking force will be less than the bond can sustain. Conversely, if the force is loaded rapidly it is more likely that the maximum breaking force is measured. Paradoxically, no clear differences in breaking force were observed in experiments on gold nanowires, despite being conducted under very different conditions. Here we explore the breaking behaviour of a single Au-Au bond and show that the breaking force is dependent on the loading rate. We probe the temperature and structural dependencies of breaking and suggest that the paradox can be explained by fast breaking of atomic wires and slow breaking of point contacts giving very similar breaking forces.

Original language	English
Article number	15934
Journal	Nature Communications
Volume	8
Pages (from-to)	1-6
Number of pages	6
ISSN	2041-1723
DOIs	https://doi.org/10.1038/ncomms15931
Publication status	Published - 17 Jul 2017

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Dynamic breaking of a single gold bondFinal published version, 580 KBLicence: CC BY

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title = "Dynamic breaking of a single gold bond",

abstract = "While one might assume that the force to break a chemical bond gives a measure of the bond strength, this intuition is misleading. If the force is loaded slowly, thermal fluctuations may break the bond before it is maximally stretched, and the breaking force will be less than the bond can sustain. Conversely, if the force is loaded rapidly it is more likely that the maximum breaking force is measured. Paradoxically, no clear differences in breaking force were observed in experiments on gold nanowires, despite being conducted under very different conditions. Here we explore the breaking behaviour of a single Au-Au bond and show that the breaking force is dependent on the loading rate. We probe the temperature and structural dependencies of breaking and suggest that the paradox can be explained by fast breaking of atomic wires and slow breaking of point contacts giving very similar breaking forces.",

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T1 - Dynamic breaking of a single gold bond

AU - Pobelov, Ilya V.

AU - Lauritzen, Kasper Primdal

AU - Yoshida, Koji

AU - Jensen, Anders Sjølund

AU - Mészáros, Gábor

AU - Jacobsen, Karsten W.

AU - Strange, Mikkel

AU - Wandlowski, Thomas

AU - Solomon, Gemma C.

PY - 2017/7/17

Y1 - 2017/7/17

N2 - While one might assume that the force to break a chemical bond gives a measure of the bond strength, this intuition is misleading. If the force is loaded slowly, thermal fluctuations may break the bond before it is maximally stretched, and the breaking force will be less than the bond can sustain. Conversely, if the force is loaded rapidly it is more likely that the maximum breaking force is measured. Paradoxically, no clear differences in breaking force were observed in experiments on gold nanowires, despite being conducted under very different conditions. Here we explore the breaking behaviour of a single Au-Au bond and show that the breaking force is dependent on the loading rate. We probe the temperature and structural dependencies of breaking and suggest that the paradox can be explained by fast breaking of atomic wires and slow breaking of point contacts giving very similar breaking forces.

AB - While one might assume that the force to break a chemical bond gives a measure of the bond strength, this intuition is misleading. If the force is loaded slowly, thermal fluctuations may break the bond before it is maximally stretched, and the breaking force will be less than the bond can sustain. Conversely, if the force is loaded rapidly it is more likely that the maximum breaking force is measured. Paradoxically, no clear differences in breaking force were observed in experiments on gold nanowires, despite being conducted under very different conditions. Here we explore the breaking behaviour of a single Au-Au bond and show that the breaking force is dependent on the loading rate. We probe the temperature and structural dependencies of breaking and suggest that the paradox can be explained by fast breaking of atomic wires and slow breaking of point contacts giving very similar breaking forces.

U2 - 10.1038/ncomms15931

DO - 10.1038/ncomms15931

M3 - Journal article

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VL - 8

SP - 1

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JO - Nature Communications

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Dynamic breaking of a single gold bond

Abstract

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