Mechanism of ion adsorption to aqueous interfaces: Graphene/water vs. air/water

Journal Article · Mon Aug 21 00:00:00 UTC 2017 · Proceedings of the National Academy of Sciences of the United States of America

DOI: https://doi.org/10.1073/pnas.1702760114 · OSTI ID:1375817

McCaffrey, Debra L.  ^[1]; Nguyen, Son C.  ^[2]; Cox, Stephen J. ^[3]; Weller, Horst ^[4]; Alivisatos, A. Paul ^[5]; Geissler, Phillip L. ^[1]; Saykally, Richard J. ^[1]

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1. Department of Chemistry, University of California, Berkeley, CA 94720,, Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
2. Department of Chemistry, University of California, Berkeley, CA 94720,, The Hamburg Centre for Ultrafast Imaging, University of Hamburg, 22761 Hamburg, Germany,
3. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
4. The Hamburg Centre for Ultrafast Imaging, University of Hamburg, 22761 Hamburg, Germany,, Institute of Physical Chemistry, University of Hamburg, 20146 Hamburg, Germany,
5. Department of Chemistry, University of California, Berkeley, CA 94720,, Department of Materials Science and Engineering, University of California, Berkeley, CA 94720,, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Kavli Energy Nanoscience Institute, University of California, Berkeley, CA 94720

Significance The Gibbs free energy of adsorption of a prototypical anion to a graphene/water interface is determined by surface-sensitive spectroscopy and interpreted via molecular dynamics simulations to establish the adsorption mechanism, which is found to be qualitatively different from that operative for the air/water interface and probably representative of a general water/hydrophobe interface.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE; USDOE Office of Science (SC)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1375817
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 51 Vol. 114; ISSN 0027-8424
• Publisher: Proceedings of the National Academy of SciencesCopyright Statement
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
SHG spectroscopy
adsorption
graphene
molecular dynamics
specific ion effects