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Local Investigation of Femtosecond Laser Induced Dynamics of Water Nanoclusters on Cu(111)

Mehlhorn, M; Carrasco, J; Michaelides, A; Morgenstern, K; (2009) Local Investigation of Femtosecond Laser Induced Dynamics of Water Nanoclusters on Cu(111). PHYS REV LETT , 103 (2) , Article 026101. 10.1103/PhysRevLett.103.026101. Green open access

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Abstract

We explore the dynamics of low temperature interfacial water nanoclusters on Cu(111) by femtosecond-laser excitation, scanning tunneling microscopy and density functional theory. Laser illumination is used to induce single molecules to diffuse within water clusters and across the surface, breaking and reforming hydrogen bonds. A linear diffusion probability with laser fluence is observed up to 0.6 J/m(2) and we suggest that diffusion is initiated by hot electron attachment and detachment processes. The density functional calculations shed light on the detailed molecular mechanism for water diffusion that is determined by the local structure of the water clusters.

Type: Article
Title: Local Investigation of Femtosecond Laser Induced Dynamics of Water Nanoclusters on Cu(111)
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.103.026101
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.103.026101
Language: English
Additional information: © 2009 The American Physical Society
Keywords: INDUCED DESORPTION, METAL-SURFACES, ICE, EXCITATION
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery.ucl.ac.uk/id/eprint/135388
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