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Semiconducting polymer heterostructures exhibiting quantum confinement effects were recently prepared in our laboratory by a self-assembly approach. Photoluminescence and photoluminescence excitation spectroscopies as well as electric field-induced photoluminescence quenching have been used here to probe the effects of exciton confinement in the self-assembled semiconducting polymer quantum-well nanostructures.
Microhardness measurements have been performed on porous silicon (PSI) films. The dependence of the hardness on porosity, morphology and the underlying silicon substrate has been established. A model which determines the intrinsic film hardness has been developed and experimentally validated. The load dependence of hardness was measured as an index of the disorder in porous silicon. Hardness analysis...
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