Complementarity of neutron reflectometry and ellipsometry for the study of atmospheric reactions at the air–water interface

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Complementarity of neutron reflectometry and ellipsometry for the study of atmospheric reactions at the air–water interface. / Sebastiani, Federica; Campbell, Richard A.; Pfrang, Christian.

In: RSC Advances, 04.12.2015, p. 107105-107111.

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@article{ae6fbf229871446ca386d5e9e0c0078b,
title = "Complementarity of neutron reflectometry and ellipsometry for the study of atmospheric reactions at the air–water interface",
abstract = "The combined application of neutron reflectometry (NR) and ellipsometry to determine the oxidation kinetics of organic monolayers at the air–water interface is described for the first time. This advance was possible thanks to a new miniaturised reaction chamber that is compatible with the two techniques and has controlled gas delivery. The rate coefficient for the oxidation of methyl oleate monolayers by gas-phase O3 determined using NR is (5.4 ± 0.6) × 10−10 cm2 per molecule per s, which is consistent with the value reported in the literature but is now better constrained. This highlights the potential for the investigation of faster atmospheric reactions in future studies. The rate coefficient determined using ellipsometry is (5.0 ± 0.9) × 10−10 cm2 per molecule per s, which indicates the potential of this more economical, laboratory-based technique to be employed in parallel with NR. In this case, temporal fluctuations in the optical signal are attributed to the mobility of islands of reaction products. We outline how such information may provide critical missing information in the identification of transient reaction products in a range of atmospheric surface reactions in the future.",
author = "Federica Sebastiani and Campbell, {Richard A.} and Christian Pfrang",
year = "2015",
month = dec
day = "4",
doi = "10.1039/C5RA22725A",
language = "English",
pages = "107105--107111",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",

}

RIS

TY - JOUR

T1 - Complementarity of neutron reflectometry and ellipsometry for the study of atmospheric reactions at the air–water interface

AU - Sebastiani, Federica

AU - Campbell, Richard A.

AU - Pfrang, Christian

PY - 2015/12/4

Y1 - 2015/12/4

N2 - The combined application of neutron reflectometry (NR) and ellipsometry to determine the oxidation kinetics of organic monolayers at the air–water interface is described for the first time. This advance was possible thanks to a new miniaturised reaction chamber that is compatible with the two techniques and has controlled gas delivery. The rate coefficient for the oxidation of methyl oleate monolayers by gas-phase O3 determined using NR is (5.4 ± 0.6) × 10−10 cm2 per molecule per s, which is consistent with the value reported in the literature but is now better constrained. This highlights the potential for the investigation of faster atmospheric reactions in future studies. The rate coefficient determined using ellipsometry is (5.0 ± 0.9) × 10−10 cm2 per molecule per s, which indicates the potential of this more economical, laboratory-based technique to be employed in parallel with NR. In this case, temporal fluctuations in the optical signal are attributed to the mobility of islands of reaction products. We outline how such information may provide critical missing information in the identification of transient reaction products in a range of atmospheric surface reactions in the future.

AB - The combined application of neutron reflectometry (NR) and ellipsometry to determine the oxidation kinetics of organic monolayers at the air–water interface is described for the first time. This advance was possible thanks to a new miniaturised reaction chamber that is compatible with the two techniques and has controlled gas delivery. The rate coefficient for the oxidation of methyl oleate monolayers by gas-phase O3 determined using NR is (5.4 ± 0.6) × 10−10 cm2 per molecule per s, which is consistent with the value reported in the literature but is now better constrained. This highlights the potential for the investigation of faster atmospheric reactions in future studies. The rate coefficient determined using ellipsometry is (5.0 ± 0.9) × 10−10 cm2 per molecule per s, which indicates the potential of this more economical, laboratory-based technique to be employed in parallel with NR. In this case, temporal fluctuations in the optical signal are attributed to the mobility of islands of reaction products. We outline how such information may provide critical missing information in the identification of transient reaction products in a range of atmospheric surface reactions in the future.

U2 - 10.1039/C5RA22725A

DO - 10.1039/C5RA22725A

M3 - Article

SP - 107105

EP - 107111

JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

ER -