Water Interactions with Acetic Acid Layers on Ice and Graphite
(2014) In The Journal of Physical Chemistry Part B 118(47). p.13333-13340- Abstract
- Adsorbed organic compounds modify the properties of environmental interfaces with potential implications for many Earth system processes. Here, we describe experimental studies of water interactions with acetic acid (AcOH) layers on ice and graphite surfaces at temperatures from 186 to 200 K. Hyperthermal D2O water molecules are efficiently trapped on all of the investigated surfaces, with only a minor fraction that scatters inelastically after an 80% loss of kinetic energy to surface modes. Trapped molecules desorb rapidly from both mu m-thick solid AcOH and AcOH monolayers on graphite, indicating that water has limited opportunities to form hydrogen bonds with these surfaces. In contrast, trapped water molecules bind efficiently to... (More)
- Adsorbed organic compounds modify the properties of environmental interfaces with potential implications for many Earth system processes. Here, we describe experimental studies of water interactions with acetic acid (AcOH) layers on ice and graphite surfaces at temperatures from 186 to 200 K. Hyperthermal D2O water molecules are efficiently trapped on all of the investigated surfaces, with only a minor fraction that scatters inelastically after an 80% loss of kinetic energy to surface modes. Trapped molecules desorb rapidly from both mu m-thick solid AcOH and AcOH monolayers on graphite, indicating that water has limited opportunities to form hydrogen bonds with these surfaces. In contrast, trapped water molecules bind efficiently to AcOH-covered ice and remain on the surface on the observational time scale of the experiments (60 ms). Thus, adsorbed AcOH is observed to have a significant impact on waterice surface properties and to enhance the water accommodation coefficient compared to bare ice surfaces. The mechanism for increased water uptake and the implications for atmospheric cloud processes are discussed. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/7515515
- author
- Papagiannakopoulos, Panos ; Kong, Xiangrui ; Thomson, Erik S and Pettersson, Jan B. C.
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- SUPERCOOLED SULFURIC-ACID, SURFACE, NITRIC-ACID, ORGANIC-ACIDS, CARBOXYLIC-ACIDS, COLLISION DYNAMICS, GAS-PHASE, HYDROGEN-BONDING INTERACTIONS, ELASTIC HELIUM SCATTERING, MOLECULAR-DYNAMICS SIMULATIONS
- in
- The Journal of Physical Chemistry Part B
- volume
- 118
- issue
- 47
- pages
- 13333 - 13340
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:84914170298
- ISSN
- 1520-5207
- DOI
- 10.1021/jp503552w
- language
- English
- LU publication?
- no
- id
- 96f6c75e-e3ac-47a8-9611-5bffee005331 (old id 7515515)
- date added to LUP
- 2016-04-04 09:37:15
- date last changed
- 2022-01-29 18:43:22
@article{96f6c75e-e3ac-47a8-9611-5bffee005331, abstract = {{Adsorbed organic compounds modify the properties of environmental interfaces with potential implications for many Earth system processes. Here, we describe experimental studies of water interactions with acetic acid (AcOH) layers on ice and graphite surfaces at temperatures from 186 to 200 K. Hyperthermal D2O water molecules are efficiently trapped on all of the investigated surfaces, with only a minor fraction that scatters inelastically after an 80% loss of kinetic energy to surface modes. Trapped molecules desorb rapidly from both mu m-thick solid AcOH and AcOH monolayers on graphite, indicating that water has limited opportunities to form hydrogen bonds with these surfaces. In contrast, trapped water molecules bind efficiently to AcOH-covered ice and remain on the surface on the observational time scale of the experiments (60 ms). Thus, adsorbed AcOH is observed to have a significant impact on waterice surface properties and to enhance the water accommodation coefficient compared to bare ice surfaces. The mechanism for increased water uptake and the implications for atmospheric cloud processes are discussed.}}, author = {{Papagiannakopoulos, Panos and Kong, Xiangrui and Thomson, Erik S and Pettersson, Jan B. C.}}, issn = {{1520-5207}}, keywords = {{SUPERCOOLED SULFURIC-ACID; SURFACE; NITRIC-ACID; ORGANIC-ACIDS; CARBOXYLIC-ACIDS; COLLISION DYNAMICS; GAS-PHASE; HYDROGEN-BONDING INTERACTIONS; ELASTIC HELIUM SCATTERING; MOLECULAR-DYNAMICS SIMULATIONS}}, language = {{eng}}, number = {{47}}, pages = {{13333--13340}}, publisher = {{The American Chemical Society (ACS)}}, series = {{The Journal of Physical Chemistry Part B}}, title = {{Water Interactions with Acetic Acid Layers on Ice and Graphite}}, url = {{http://dx.doi.org/10.1021/jp503552w}}, doi = {{10.1021/jp503552w}}, volume = {{118}}, year = {{2014}}, }