Structure-function relations in self-assembled C18- and C20-sphingosines monolayers at gas/water interfaces

Journal of the American Chemical Society

Volumn 125, Issue 5, 2003, Pages 1313-1318

  Vaknin, David ^a  

^a IOWA STATE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

LIQUIDLIKE METASTABLE MONOLAYERS;

ALCOHOLS; HYDROCARBONS; ISOTHERMS; SYNCHROTRON RADIATION;

SELF ASSEMBLY;

CERAMIDE; HYDROCARBON; SPHINGOSINE DERIVATIVE; WATER;

ARTICLE; CHEMICAL ANALYSIS; CRYSTALLIZATION; EUKARYOTIC CELL; HYDROGEN BOND; ISOTHERM; STRUCTURE ACTIVITY RELATION; STRUCTURE ANALYSIS; SYNCHROTRON; X RAY DIFFRACTION;

AIR; PRESSURE; SPHINGOSINE; STRUCTURE-ACTIVITY RELATIONSHIP; SURFACE PROPERTIES; WATER; X-RAY DIFFRACTION;

EID: 0037419801     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja028292m     Document Type: Article

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20. -1 for water surface. The penetration depth of the incident evanescent X-ray is smaller than 100 Å, thereby probing the topmost water layers with some contribution from bulk liquid. The shift in the position of the first peak indicates a slightly larger O-O d spacing at the interface.
21. 2). Counting time for GIXD measurements was 1-4 s per point, whereas for the rod scans, it varied between 4 and 20 s per point. The data shown in Figures 3-6 were all normalized to a monitor before the sample with an average 68 000 counts/s. For example, at the count rate of the peak of the Bragg reflection of C20-SP (Figure 3A), it is nearly 1200 counts/s.