Two-dimensional pigment monolayer assemblies for light-harvesting applications: Structural characterization at the air/water interface with X-ray specular reflectivity and on solid substrates by optical absorption spectroscopy
- Iowa State Univ., Ames, IA (United States)
- Brookhaven National Lab., Upton, NY (United States)
- Univ. of California, Davis, CA (United States)
- Illinois State Univ., Normal, IL (United States)
X-ray specular reflectivity at the liquid/gas interface of dihexadecyl phosphate (DHDP) on pure H{sub 2}O and on a series of pigment-containing aqueous solutions are reported along with visible absorption spectra of corresponding monomolecular Langmuir-Blodgett films on quartz substrates. Reflectivity from DHDP reveals that at large surface pressure, the film is closely packed with untilted hydrocarbon chains and hydrated phosphate headgroups. Visible absorption spectra of all transferred films indicate a closely packed single pigment layer, consistent with reflectivity results. The existence of a complete pigment monolayer over the measured surface-pressure-molecular area isotherms has been evidenced by both X-ray reflectivity and visible optical studies. 64 refs., 8 figs., 3 tabs.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- DOE Contract Number:
- AC02-76CH00016; W-7405-ENG-82
- OSTI ID:
- 502014
- Journal Information:
- Journal of Physical Chemistry B: Materials, Surfaces, Interfaces, amp Biophysical, Vol. 101, Issue 11; Other Information: PBD: 13 Mar 1997
- Country of Publication:
- United States
- Language:
- English
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