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Sangku Lee,Junseong Lee,Jae Nyoung Kim 대한화학회 2023 Bulletin of the Korean Chemical Society Vol.44 No.5
Five-ring-fused azepinone derivatives were synthesized serendipitously from bis-isatins via sequential 6π-electrocyclic ring closure, ring expansion, and dehydrogenation process in moderate yields (34%–47%). The reaction was carried out in diphenyl ether at 230 °C for 4–12 h under O2 balloon atmosphere.
Kwon, Sangku,Lee, Seon Joo,Kim, Sun Mi,Lee, Youngkeun,Song, Hyunjoon,Park, Jeong Young The Royal Society of Chemistry 2015 Nanoscale Vol.7 No.29
<P>The electrical nature of the nanoscale contact between metal nanodots and semiconductor rods has drawn significant interest because of potential applications for metal-semiconductor hybrid nanostructures in energy conversion or heterogeneous catalysis. Here, we studied the nanoscale electrical character of the Pt/CdSe junction in Pt/CdSe/Pt nanodumbbells on connected Au islands by conductive-probe atomic force microscopy under ultra-high vacuum. Current-voltage plots measured in contact mode revealed Schottky barrier heights of individual nanojunctions of 0.41 0.02 eV. The measured value of the Schottky barrier is significantly lower than that of planar thin-film diodes because of a reduction in the barrier width and enhanced tunneling probability at the interface.</P>