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1、水溶性多壁碳纳米管／铜酞菁染料自组装薄膜的制备与表征第18卷第6期2005年12月化学物理CHINESEJOURNALOFCHEMICALPHYSICSVo1.18.No.6Dec.2o051o03-7713/2005/06.1039-4水溶性多壁碳纳米管/铜酞菁染料自组装薄膜的制备与表征余海湖,余丁山,周灵德,王海霞,姜德生(武汉理工大学光纤传感技术与信息处理教育部重点实验室,武汉430070)摘要:采用化学氧化法制备了可溶性多壁碳纳米管,借助超声作用把可溶性多壁碳纳米管分散在水中形成水溶胶,采用自组装技术制备了可溶性多壁碳纳米管/铜酞菁染料的复合薄膜,采用原子力显微镜
2、,红外光谱,吸收光谱和荧光光谱对可溶性多壁碳纳米管及其水溶胶,自组装复合薄膜进行了表征.实验结果显示多壁纳米碳管水溶胶具有较好的组装成膜性能,吸收光谱结果表明染料分子在膜内形成了J聚集体,荧光光谱结果表明复合薄膜的荧光来自于铜酞菁染料,引入多壁碳纳米管对染料分子的荧光发射特性有一定影响.关键词:多壁碳纳米管;水溶胶;静电自组装;薄膜中图分类号:0647.3文献标识码:ASelf-assemblyofWaterSolubleMulti-wallCarbonNanotube/CopperPhthalocyanineDyeMultilayerFilmsYuHaihu',YuDi
3、ngshan,ZhouLingde,WangHaixia,JiangDesheng(KeyLaboratoryofFiberOpticSensingTechnologyandInformationProcessing,MinistryofEducation,WuhanUniversityofTechnology,Wuhan430070)AbstractWatersolublemulti.wallcarbonnanotubes(MWCNTs)werepreparedviachemicaloxidation.Underultrasonication.thechemically
4、treatedMWCNTscanbedispersedinwatertoformcolloids.TheMWCNTswerecharacterizedbyFT.IRspectra.TheFT.IRspectrarevealthepresenceofcarboxylicgroupsonthenanotubes.Thefunctionalgroupscanimprovethenanotubes,solubilityinwater.AlcianBlue8GX(AB),aquaternaryammoniumdyeofthecopperphthalocyaninegroup,was
5、dissolvedinwaterandusedtoformelectrostaticcallyserf-assembledmultilayerfilms.TheMWCNT/ABcompositefilmswerecharacterizedbyUV.visabsorptionspectraaswellasAFMandfluorescencespectrum.TheexperimentalresultsshowthattheMWCNT/ABcompositefilmsCanbeproducedeasilv.ComparedtothoseoftheABaqueoussoluti
6、ons,compositefilmsexhibitpronounceddifferencesintheabsorptionandfluorescencespectra,whichsuggeststhatABmoleculesaggregatedinthecompositefilm,andthatacharge.transfermightexistbetweenABmoleculesandtheMWCNTs.KeywordsMulti.wallcarbonnanotube.Colloid.Electrostaticself-assembly,Thinfilm言碳纳米管具有独
7、特的电学特性,力学特性,储氢研究的热点.碳纳米管不溶于水和一些有机溶剂,$Correspondingauthor.Email:hhyu@mail.whut.edu.cn.Received17November2004;infinalform26Apirl2005.1040化学物理第l8卷而且分散性比较差,限制了其应用.化学切割可在碳纳米管管壁或端头上形成羧基或羟基,而羧基等官能团有助于碳纳米管在水中形成胶体.羧基可以跟一NH等功能基团反应,可制备碳纳米管基自组装复合材料2'.Smalley等利用强酸和超声波对碳纳米管进行切割,得
