Till sidans topp

Sidansvarig: Webbredaktion
Sidan uppdaterades: 2012-09-11 15:12

Tipsa en vän
Utskriftsversion

Water Interactions with A… - Göteborgs universitet Till startsida
Webbkarta
Till innehåll Läs mer om hur kakor används på gu.se

Water Interactions with Acetic Acid Layers on Ice and Graphite

Artikel i vetenskaplig tidskrift
Författare Panos Papagiannakopoulos
Xiangrui Kong
Erik S Thomson
Jan B. C. Pettersson
Publicerad i Journal of Physical Chemistry B
Volym 118
Nummer/häfte 47
Sidor 13333-13340
ISSN 1520-6106
Publiceringsår 2014
Publicerad vid Institutionen för kemi och molekylärbiologi
Sidor 13333-13340
Språk en
Länkar dx.doi.org/10.1021/jp503552w
Ämnesord SUPERCOOLED SULFURIC-ACID, MOLECULAR-DYNAMICS SIMULATIONS, HYDROGEN-BONDING INTERACTIONS, ELASTIC HELIUM SCATTERING, GAS-PHASE, COLLISION DYNAMICS, CARBOXYLIC-ACIDS, ORGANIC-ACIDS, NITRIC-ACID, SURFACE
Ämneskategorier Fysikalisk kemi

Sammanfattning

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.

Sidansvarig: Webbredaktion|Sidan uppdaterades: 2012-09-11
Dela:

På Göteborgs universitet använder vi kakor (cookies) för att webbplatsen ska fungera på ett bra sätt för dig. Genom att surfa vidare godkänner du att vi använder kakor.  Vad är kakor?