NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 6 of 9302
Interaction of a sodium ion with the water liquid-vapor interface
External Online Source: doi:10.1016/0301-0104(89)80006-0
Author and Affiliation:
Wilson, M. A.(University of California, Department of Chemistry, Berkeley 94720, United States)
Pohorille, A.
Pratt, L. R.
MacElroy, R. D. [Principal Investigator]
Abstract: Molecular dynamics results are presented for the density profile of a sodium ion near the water liquid-vapor interface at 320 K. These results are compared with the predictions of a simple dielectric model for the interaction of a monovalent ion with this interface. The interfacial region described by the model profile is too narrow and the profile decreases too abruptly near the solution interface. Thus, the simple model does not provide a satisfactory description of the molecular dynamics results for ion positions within two molecular diameters from the solution interface where appreciable ion concentrations are observed. These results suggest that surfaces associated with dielectric models of ionic processes at aqueous solution interfaces should be located at least two molecular diameters inside the liquid phase. A free energy expense of about 2 kcal/mol is required to move the ion within two molecular layers of the free water liquid-vapor interface.
Publication Date: Jan 01, 1989
Document ID:
20040089009
(Acquired Sep 07, 2004)
Subject Category: EXOBIOLOGY
Document Type: Journal Article
Publication Information: Chemical physics; p. 209-12; (ISSN 0301-0104); Volume 129
Publisher Information: Netherlands
Contract/Grant/Task Num: NCA2-140
Description: In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GASES; LIQUID-VAPOR INTERFACES; METAL IONS; POSITIVE IONS; SODIUM; TEMPERATURE; WATER; EXOBIOLOGY; IONS; MODELS
Other Descriptors: GASES; SODIUM/ANALYSIS/METABOLISM; TEMPERATURE; WATER/ANALYSIS/METABOLISM; IONS; MODELS, MOLECULAR; MODELS, THEORETICAL; SUPPORT, NON-U.S. GOV'T; SUPPORT, U.S. GOV'T, NON-P.H.S; NASA CENTER ARC; NASA DISCIPLINE EXOBIOLOGY
Availability Source: Other Sources
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: August 23, 2011
Contact Us