This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.The main objective of the proposal was to characterize the crystalline packing for a variety of self-assembled nanostructures of the organic semiconducting molecules fabricated by pi-pi stacking. In general q-value for the pi-pi stacking is close to 1.8 which is 0.34 nm in d-spacing units (as found in graphite). Thus, by measuring the WAXS in the q-range of 0.01 to 3.0 -1 the packing behavior for each of the self-assembled nanostructure could be deduced. Such a measurement provides a pathway to understand the detailed structure-property-function relationships through which one can expect to tailor better organic molecules for optimized performance.
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