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Waveguide‐enhanced scattering from thin biomolecular films
Author(s) -
Pfeiffer F.,
Mennicke U.,
Salditt T.
Publication year - 2002
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889801021628
Subject(s) - diffraction , waveguide , optics , scattering , substrate (aquarium) , excited state , materials science , thin film , silicon , standing wave , beam (structure) , resolution (logic) , layer (electronics) , optoelectronics , physics , nanotechnology , atomic physics , oceanography , artificial intelligence , computer science , geology
An X‐ray diffraction experiment on multilamellar membranes incorporated into an X‐ray waveguide structure is reported. In the device, the lipid bilayers are confined to one side by the silicon substrate and to the other side by an evaporated thin metal cap layer. Shining a highly brilliant X‐ray beam onto the system, resonantly enhanced, precisely defined and clearly distinguishable standing‐wavefield distributions (modes) are excited. The in‐plane structure of the acyl chain ordering is then studied by grazing incidence diffraction under simultaneously excited modes. A significant gain in signal‐to‐noise ratio as well as enhanced spatial resolution can be obtained with such a setup.