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Nano-ice on boron nitride nanomesh: accessing proton disorder


Ma, H; Brugger, T; Berner, S; Ding, Y; Iannuzzi, M; Hutter, J; Osterwalder, J; Greber, T (2010). Nano-ice on boron nitride nanomesh: accessing proton disorder. ChemPhysChem, 11(2):399-403.

Abstract

Water was investigated on a h-BN/Rh(111) nanomesh template using variable temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. Below 52 K, two distinct phases self-assemble within the 3.2 nm unit cell of the nanomesh that consists of "holes" and "wires". In the 2 nm holes, an ordered phase of nano-ice crystals with about 40 molecules is found. The ice crystals arrange in a bilayer honeycomb lattice, where hydrogen atoms of the lower layer point to the substrate. The phase on the 1 nm wires is a low density gas phase. Tunneling barrier height dI/dz spectroscopy measurements reveal the dipoles of individual molecules in the nano-ice clusters and access proton disorder.

Abstract

Water was investigated on a h-BN/Rh(111) nanomesh template using variable temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations. Below 52 K, two distinct phases self-assemble within the 3.2 nm unit cell of the nanomesh that consists of "holes" and "wires". In the 2 nm holes, an ordered phase of nano-ice crystals with about 40 molecules is found. The ice crystals arrange in a bilayer honeycomb lattice, where hydrogen atoms of the lower layer point to the substrate. The phase on the 1 nm wires is a low density gas phase. Tunneling barrier height dI/dz spectroscopy measurements reveal the dipoles of individual molecules in the nano-ice clusters and access proton disorder.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:530 Physics
540 Chemistry
Language:English
Date:2010
Deposited On:10 Feb 2011 16:06
Last Modified:29 May 2017 21:18
Publisher:Wiley-Blackwell
ISSN:1439-4235
Publisher DOI:https://doi.org/10.1002/cphc.200900857
PubMed ID:20024977

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