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ultraclean transfer of graphene by mechanically exfoliating polymer with modified crosslink density

Nano Research 2024年第8期17卷 6795-6802页

作者： Qi Lu Jiawei Yang Chaofan Zhou Zhaoning Hu Saiyu Bu Bingbing Guo Yixuan Zhao Junhao Liao Mingpeng Shang Ge Chen Kaicheng Jia Jianbo Yin Qiang Zeng Li Lin Zhongfan Liu College of Science China University of Petroleum(Beijing)Beijing 102249China School of Materials Science and Engineering Peking UniversityBeijing 100871China Center for Nanochemistry Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular ScienceCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Beijing Graphene Institute Beijing 100095China Faculty of Information Technology Beijing University of TechnologyBeijing 100124China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Department of Electronics Peking UniversityBeijing 100871China Second Clinical Division National Engineering Laboratory for Digital and Material Technology of StomatologyPeking University School and Hospital of StomatologyBeijing 100081China

The transfer of graphene from metallic substrates onto application-specific substrates is usually inevitable for the applications of high-quality graphene films derived from chemical vapour deposition(CVD)*** used to support the graphene films during the transfer,the coating of the polymer would produce the surface contaminations and hinder the industrially compatible *** this work,through the thermal imidization of polyamide acid(PAA)to polyimide(PI)and tuning of the concentration of dangling chains,we achieved the ultraclean and crack-free transfer of graphene wafers with high electronic *** resulting contamination-free and hydrophilic surface also enabled the observed improved cell viability in a biomedical *** avoiding aqueous etching or the usage of strong bases,our proposed transfer method is industrially compatible for batch transfer of graphene films towards the real applications.

关键词： chemical vapour deposition(CVD)graphene films graphene transfer ultraclean transfer transfer medium crosslink density cell viability assay

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