摘要
提出一种利用双光束激光干涉系统制备多级石墨烯仿生表面的方法.利用Nd:YAG激光的双光束干涉系统在不同织物基底上对石墨烯氧化物薄膜进行干涉烧蚀,激光脱氧还原的同时产生石墨烯微纳结构.基底织物表面粗糙结构增大了石墨烯仿生薄膜表面粗糙度.布基的粗糙基底、激光烧蚀石墨烯微纳结构的双重作用形成多级结构的石墨烯仿生表面.这种石墨烯仿生表面不仅具有超疏水润湿性,还由于石墨烯微纳结构周期性而展现一定彩虹结构色.
Through millions of years of evolution and natural selection,various biological species own unique physiological structure and amazing functionality.Biomimetic fabrication demonstrate remarkable trend of development,artificial biomimetic materials and intelligent functional surfaces have been extensively studied by scientists both theoretically and experimentally.In general,traditional biomimetic materials consisting of metal,metal oxides,carbon materials and some other polymer materials,which make outstanding contribution to the generation and development of engineering bionics science and interface chemistry analysis.However,simpleminded traditional materials are not capable to deal with the presence of intelligent driving control and micro nano device applications in artificial biomimetic science.It is well established that the combination of novel materials and novel biomimetic technology may lead to promote progress and development of fabrication with smart integration of multifunctional biomimetic devices.More recently,a kind of carbon nanomaterials with an atomic layer thickness which named graphene has attracted most widely attention due to its excellent properties,for instance ultrahigh carrier mobility,good electrical conductivity,high transmittance and biocompatibility since it has been founded by mechanical stripping adhesive tape,it becomes a new star of materials scientific fields.Its stable physical/chemical properties make it widely applied in electronic devices,optical devices,biochips,and even intelligent robots.Based on graphene’s distinctive material properties,micronano-structured graphene surfaces with special wettability may be fabricated in a biomimetic manner that not only contribute to the experimental research but also bring about a new revolution of graphene-devices.A method of fabrication of biomimetic graphene surface with multilevel-structures by two-beam laser interference system has been proposed.Graphene oxide films on different fabric bases have been reduced and ablated by Nd:YAG laser interference system.Periodic graphene micronano-structures with grating-like micro structures and additional nanoscale structures have been produced during laser processing process with appropriate laser power(0.4 W),which resulted in deoxidization of abundant hydrophilic oxygen containing groups(OCGs)on GO sheets.To original GO film,the reduced GO(RGO)surface not only exhibited more rough geometry,but also owned lower surface energy.Raman spectroscopy has been characteristiced,the result of the D and G band peaks of RGO show neglectable changes contrast GO.The reason is that the laser cutting and ablation can bring additional new defects on the edges of graphene sheets,which leads to the increase of D band peak.As a result,the spectra show unobvious changes.Roughness of the fabric surface(silk,cotton,nylon)further increased the surface roughness of biomimetic graphene surface.Graphene biomimetic surface with multi-structures has been formed by the double action of rough fabric base and graphene micronano-structure.The graphene bionic surface with nylon substrate has the largest hydrophobic angle,~156°.The biomimetic graphene surface not only possesses superhydrophobic wettability,but also exhibits rainbow structural color due to the existence of periodic graphene micronano-structures.We believe that the biomimetic graphene surface on fabric substrate will not only have important application prospects in the field of bionics,but also be a major exploration and breakthrough in the future research of optoelectronic and wearable devices.
作者
姜昊伯
刘娟
宋云云
刘燕
任露泉
Haobo Jiang;Juan Liu;Yunyun Song;Yan Liu;Luquan Ren(Key Laboratory of Bionic Engineering(Ministry of Education),College of Biological and Agricultural Engineering,Jilin University,Changchun 130000,China)
出处
《科学通报》
EI
CAS
CSCD
北大核心
2019年第12期1290-1295,共6页
Chinese Science Bulletin
基金
国家自然科学基金(51705192)
博士后创新人才支持计划(BX201600064)
博士后科学基金(2017M611325)资助
关键词
双光束激光干涉
织物布基
石墨烯
超疏水
结构色
two-beam laser interference
fabric base
grapheme
superhydrophobicity
structural color
作者简介
联系人:刘燕,E-mail:lyyw@jlu.edu.cn
