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For organic field effect transistors (OFETs), pentacene is often used as a typical semiconductor material and reported to have as high carrier mobility as a-Si. Dibenzochrysene (DBC) as well as pentacene consist of only aromatic rings. DBC can be synthesized by simple procedure and has higher solubility than pentacene. We studied film morphology of DBC fabricated by deposition or spin-coating. It...
Quantitative X-ray structural analysis coupled with anomalous X-ray scattering has been used for characterizing the atomic-scale structure of rust formed on steel surfaces. Samples were prepared from rust layers formed on the surfaces of two commercial steels. X-ray scattered intensity profiles of the two samples showed that the rusts consisted mainly of two types of ferric oxyhydroxide, α-FeOOH and...
We have grown thin GaN epitaxial films on Si(111) and sapphire (0001) with AlN buffer layers using pulsed laser deposition and investigated the distortion of the films using synchrotron radiation grazing incidence-angle X-ray diffraction for the first time. We have found that the strains in the AlN films were almost fully relaxed at the growth temperature (800 o C) by the introduction of the...
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