title: Surface Modification of C3N4through Oxygen-Plasma Treatment: A Simple Way toward Excellent Hydrophilicity.
abstract: We developed a universal method to prepare hydrophilic carbon nitrogen (C3N4) nanosheets. By treating C3N4nanosheets with oxygen plasma, hydroxylamine groups (N-OH) with intense protonation could be introduced on the surface; moreover, the content of N-OH groups increased linearly with the oxygen-plasma treatment time. Thanks to the excellent hydrophilicity, uniformly dispersed C3N4solution were prepared, which was further translated into C3N4paper by simple vacuum filtration. Pure C3N4paper with good stability, excellent hydrophilicity, and biocompatibility were proved to have excellent performance in tissue repair. Further research demonstrated that the oxygen-plasma treatment method can also introduce N-OH groups into other nitrogen-containing carbon materials (NCMs) such as N-doped graphene, N-doped carbon nanotube, and C2N, which offers a new perspective on the surface modification and functionalization of these carbon nanomaterials.
authors: School of Materials Science and Engineering, University of Shanghai for Science and Technology , Shanghai 200093, China.|State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.
authors: Xiuming
authors: X
authors: Bu
authors: Department of Ophthalmology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine , Shanghai 20011, China.
authors: Jipeng
authors: J
authors: Li
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.
authors: Siwei
authors: S
authors: Yang
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.
authors: Jing
authors: J
authors: Sun
authors: Department of Ophthalmology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine , Shanghai 20011, China.
authors: Yuan
authors: Y
authors: Deng
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.|School of Physical Science and Technology, Shanghai Tech University , Shanghai 200031, China.
authors: Yucheng
authors: Y
authors: Yang
authors: Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University , Ningbo, Zhejiang 315211, China.
authors: Gang
authors: G
authors: Wang
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.
authors: Zheng
authors: Z
authors: Peng
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.
authors: Peng
authors: P
authors: He
authors: School of Materials Science and Engineering, University of Shanghai for Science and Technology , Shanghai 200093, China.
authors: Xianying
authors: X
authors: Wang
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.
authors: Guqiao
authors: G
authors: Ding
authors: School of Materials Science and Engineering, University of Shanghai for Science and Technology , Shanghai 200093, China.
authors: Junhe
authors: J
authors: Yang
authors: State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science , Shanghai 200500, China.|CAS Center for Excellence in Superconducting Electronics (CENSE) , Shanghai 200050, China.|School of Physical Science and Technology, Shanghai Tech University , Shanghai 200031, China.
authors: Xiaoming
authors: X
authors: Xie
keywords: C3N4; excellent hydrophilicity; nitrogen-containing carbon materials; oxygen-plasma treatment; tissue repair