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Self‐Crack‐Filled Graphene Films by Metallic Nanoparticles for High‐Performance Graphene Heterojunction Solar Cells 下载免费PDF全文
Po‐Hsun Ho Yi‐Ting Liou Chien‐Hsun Chuang Shih‐Wei Lin Chi‐Yang Tseng Di‐Yan Wang Chia‐Chun Chen Wen‐Yi Hung Cheng‐Yen Wen Chun‐Wei Chen 《Advanced materials (Deerfield Beach, Fla.)》2015,27(10):1724-1729
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Xinglong Pan Lihua Shen Albertus P. H. J. Schenning Cees W. M. Bastiaansen 《Advanced materials (Deerfield Beach, Fla.)》2019,31(40)
Transparent, ultradrawn, ultrahigh molecular weight polyethylene (UHMWPE)/graphene nanocomposite films with a high thermal conductivity are successfully fabricated by solution‐casting and solid‐state drawing. It is found that the low optical transmittance (<75%) of the ultradrawn UHMWPE/graphene composite films is drastically improved (>90%) by adding 2‐(2H‐benzontriazol‐2‐yl)‐4,6‐ditertpentylphenol (BZT) as a second additive. This high transmission is interpreted in terms of a reduced void content in the composite films and the improved dispersion of graphene both of which decrease light scattering. The high thermal conductivity is attributed to the π–π interaction between BZT and graphene. In addition, a high specific thermal conductivity of ≈75 W m?1 K?1 ρ?1 of the ultradrawn UHMWPE/graphene/BZT composite films is obtained, which is higher than most metals and polymer nanocomposite. These transparent films are potentially excellent candidates for thermal management in various applications due to a combination of low density, ease of processing, and high thermal conductivity. 相似文献
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Sukanta De Paul J. King Mustafa Lotya Arlene O'Neill Evelyn M. Doherty Yenny Hernandez Georg S. Duesberg Jonathan N. Coleman 《Small (Weinheim an der Bergstrasse, Germany)》2010,6(3):458-464
Graphite is exfoliated in water to give dispersions of mono‐ and few‐layer graphene stabilized by surfactant. These dispersions can be used to form thin, disordered films of randomly stacked, oxide‐free, few‐layer graphenes. These films are transparent with a direct current conductivity of up to 1.5 × 104 S m?1. The conductivity is stable under flexing for at least 2000 cycles. The electrical properties are limited by disorder and aggregation suggesting future routes for improvement. 相似文献
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Graphene‐based sheets that possess a unique nanostructure and a variety of fascinating properties are appealing as promising nanoscale building blocks of new composites. Herein, graphene oxide sheets are used as the nanoscale substrates for the formation of silver‐nanoparticle films. These silver‐nanoparticle films assembled on graphene oxide sheets are flexible and can form stable suspensions in aqueous solutions. They can also be easily processed, forming macroscopic films with high reflectivity. Raman signals of graphene oxide in such hybrid films are increased by the attached silver nanoparticles, displaying surface‐enhanced Raman scattering activity. The degree of enhancement can be adjusted by varying the quantity of silver nanoparticles on the graphene oxide sheets. 相似文献