Observation of residual disorder in the centre of amorphous solid water films after pore collapse at 125K

S. Townrow, P. G. Coleman

Research output: Contribution to journalArticle

52 Downloads (Pure)

Abstract

The rapid structural re-organisation of porous amorphous solid water, grown to thicknesses in the range 2.5-70 µm by vapour deposition on a copper substrate at 75K, after heating to 125K has been found to leave a µm-wide band of residual disorder – for example, nm-sized closed pores - in the centre of the film. This layer was revealed by thinning the film by sublimation and continuously measuring the fraction of 1.5 keV positrons implanted into the film which forms ortho-positronium in the top 150nm and decay into three gamma photons.
Original languageEnglish
Article number475007
Number of pages4
JournalJournal of Physics: Condensed Matter
Volume27
Issue number47
Publication statusPublished - 2 Nov 2015

Fingerprint

disorders
porosity
Water
water
Vapor deposition
Sublimation
positronium
Positrons
sublimation
Copper
positrons
Photons
vapor deposition
broadband
Heating
copper
heating
photons
decay
Substrates

Keywords

  • positronium, water ice, defects

Cite this

Observation of residual disorder in the centre of amorphous solid water films after pore collapse at 125K. / Townrow, S.; Coleman, P. G.

In: Journal of Physics: Condensed Matter , Vol. 27, No. 47, 475007, 02.11.2015.

Research output: Contribution to journalArticle

@article{ec60549f8b02437eba06ffe87592d82e,
title = "Observation of residual disorder in the centre of amorphous solid water films after pore collapse at 125K",
abstract = "The rapid structural re-organisation of porous amorphous solid water, grown to thicknesses in the range 2.5-70 µm by vapour deposition on a copper substrate at 75K, after heating to 125K has been found to leave a µm-wide band of residual disorder – for example, nm-sized closed pores - in the centre of the film. This layer was revealed by thinning the film by sublimation and continuously measuring the fraction of 1.5 keV positrons implanted into the film which forms ortho-positronium in the top 150nm and decay into three gamma photons.",
keywords = "positronium, water ice, defects",
author = "S. Townrow and Coleman, {P. G.}",
year = "2015",
month = "11",
day = "2",
language = "English",
volume = "27",
journal = "Journal of Physics: Condensed Matter",
issn = "0953-8984",
publisher = "IOP Publishing",
number = "47",

}

TY - JOUR

T1 - Observation of residual disorder in the centre of amorphous solid water films after pore collapse at 125K

AU - Townrow, S.

AU - Coleman, P. G.

PY - 2015/11/2

Y1 - 2015/11/2

N2 - The rapid structural re-organisation of porous amorphous solid water, grown to thicknesses in the range 2.5-70 µm by vapour deposition on a copper substrate at 75K, after heating to 125K has been found to leave a µm-wide band of residual disorder – for example, nm-sized closed pores - in the centre of the film. This layer was revealed by thinning the film by sublimation and continuously measuring the fraction of 1.5 keV positrons implanted into the film which forms ortho-positronium in the top 150nm and decay into three gamma photons.

AB - The rapid structural re-organisation of porous amorphous solid water, grown to thicknesses in the range 2.5-70 µm by vapour deposition on a copper substrate at 75K, after heating to 125K has been found to leave a µm-wide band of residual disorder – for example, nm-sized closed pores - in the centre of the film. This layer was revealed by thinning the film by sublimation and continuously measuring the fraction of 1.5 keV positrons implanted into the film which forms ortho-positronium in the top 150nm and decay into three gamma photons.

KW - positronium, water ice, defects

UR - http://iopscience.iop.org/0953-8984/27/47/475007

M3 - Article

VL - 27

JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

SN - 0953-8984

IS - 47

M1 - 475007

ER -