A simple and effective photochemical method was developed for cross-linking of polymer gate dielectrics. Laborious synthetic processes for functionalizing polymer dielectrics with photo-cross-linkable groups were avoi...A simple and effective photochemical method was developed for cross-linking of polymer gate dielectrics. Laborious synthetic processes for functionalizing polymer dielectrics with photo-cross-linkable groups were avoided. The photo-cross-linker, BBP-4, was added into host polymers by simple solution blending process, which was capable of abstracting hydrogen atoms from polymers containing active C--H groups upon exposure to ultraviolet （UV） radiation. The cross-linking can be completed with a relatively long wavelength UV light （365 nm）. The approach has been applied to methacrylate and styrenic polymers such as commercial poly（methylmethacrylate） （PMMA）, poly（iso-butylmethacrylate） （PiBMA） and poly（4-methylstyrene） （PMS）. The cross-linked networks enhanced dielectric properties and solvent resistance of the thin films. The bottom-gate organic field-effect transistors （OFETs） through all solution processes on plastic substrate were fabricated. The OFET devices showed low voltage operation and steep subthreshold swing at relatively small gate dielectric capacitance.展开更多
To the Editor:Papular elastorrhexis(PE)is a rare acquired elastic tissue disease.Its etiology and pathogenesis remain unknown.PE is predisposed to the trunk and limbs and clinically presented as multiple asymptomatic,...To the Editor:Papular elastorrhexis(PE)is a rare acquired elastic tissue disease.Its etiology and pathogenesis remain unknown.PE is predisposed to the trunk and limbs and clinically presented as multiple asymptomatic,3-to 5-mm non-follicular flesh-colored papules on children and adolescents,mainly in women.It presents only cutaneous involvement,and most of the patients are asymptomatic and often misdiagnosed and untreated.Herein,we present a case of PE and describe its dermoscopic features that have not been previously reported.展开更多
基金financially supported by the National Natural Science Foundation of China (Nos.21674060,21274087,61674102,and 61334008)National Key R&D Program (No.2016YFB0401100)
文摘A simple and effective photochemical method was developed for cross-linking of polymer gate dielectrics. Laborious synthetic processes for functionalizing polymer dielectrics with photo-cross-linkable groups were avoided. The photo-cross-linker, BBP-4, was added into host polymers by simple solution blending process, which was capable of abstracting hydrogen atoms from polymers containing active C--H groups upon exposure to ultraviolet （UV） radiation. The cross-linking can be completed with a relatively long wavelength UV light （365 nm）. The approach has been applied to methacrylate and styrenic polymers such as commercial poly（methylmethacrylate） （PMMA）, poly（iso-butylmethacrylate） （PiBMA） and poly（4-methylstyrene） （PMS）. The cross-linked networks enhanced dielectric properties and solvent resistance of the thin films. The bottom-gate organic field-effect transistors （OFETs） through all solution processes on plastic substrate were fabricated. The OFET devices showed low voltage operation and steep subthreshold swing at relatively small gate dielectric capacitance.
文摘To the Editor:Papular elastorrhexis(PE)is a rare acquired elastic tissue disease.Its etiology and pathogenesis remain unknown.PE is predisposed to the trunk and limbs and clinically presented as multiple asymptomatic,3-to 5-mm non-follicular flesh-colored papules on children and adolescents,mainly in women.It presents only cutaneous involvement,and most of the patients are asymptomatic and often misdiagnosed and untreated.Herein,we present a case of PE and describe its dermoscopic features that have not been previously reported.
