Effect of surface chemistry in contrast-modified SAXS of microporous carbons

K. László, Erik Geissler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In contrast variation techniques the interaction between the carbon surface and the fluid phase plays a major role. A relative density function p(q) can be constructed from the ratio of the SAXS response with and without the adsorbed fluid to visualize the pore filling. For n-hexane vapor, the dispersion interaction ensures complete filling of the narrow pores, while larger pores are unpopulated. The value of q at which p(q) vanishes for n-hexane coincides with the critical size of this molecule. For water vapor at 50% relative humidity cluster formation and the degree of filling depend on the extent of oxidation. In the highly oxidized sample, a cooperative mechanism enhances the filling even of larger pores. This is an abstract of a paper presented at the 231th ACS National Meeting (Atlanta, GA 3/26-30/2006).

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Volume231
Publication statusPublished - 2006
Event231th ACS National Meeting - Atlanta, GA, United States
Duration: Mar 26 2006Mar 30 2006

Other

Other231th ACS National Meeting
CountryUnited States
CityAtlanta, GA
Period3/26/063/30/06

Fingerprint

Surface chemistry
Carbon
Fluids
Steam
Probability density function
Atmospheric humidity
Vapors
Oxidation
Molecules
n-hexane

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

László, K., & Geissler, E. (2006). Effect of surface chemistry in contrast-modified SAXS of microporous carbons. In ACS National Meeting Book of Abstracts (Vol. 231)

Effect of surface chemistry in contrast-modified SAXS of microporous carbons. / László, K.; Geissler, Erik.

ACS National Meeting Book of Abstracts. Vol. 231 2006.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

László, K & Geissler, E 2006, Effect of surface chemistry in contrast-modified SAXS of microporous carbons. in ACS National Meeting Book of Abstracts. vol. 231, 231th ACS National Meeting, Atlanta, GA, United States, 3/26/06.
László K, Geissler E. Effect of surface chemistry in contrast-modified SAXS of microporous carbons. In ACS National Meeting Book of Abstracts. Vol. 231. 2006
László, K. ; Geissler, Erik. / Effect of surface chemistry in contrast-modified SAXS of microporous carbons. ACS National Meeting Book of Abstracts. Vol. 231 2006.
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