硅烷化光纤表面微结构成分的扫描电镜及能谱仪联用表征  

Study on Microscopic Composition of Fiber-optic after Silanization by Scanning Electron Microscopy and Energy Dispersive Spectrometry

作　　者：王以明[1,2] 张玉玉[3] 庞小峰[1] 王洪志[1,4] 蔡国军[3] 

机构地区：[1]电子科技大学生命科学与技术学院,四川成都610054 [2]成都理工大学材料与化学化工学院,四川成都610059 [3]成都理工大学环境与土木工程学院,四川成都610059 [4]西南民族大学生命科学与技术学院,四川成都610041

出　　处：《分析测试学报》2008年第11期1244-1247,共4页Journal of Instrumental Analysis

基　　金：四川省重点科技攻关项目资助(2006z02-0101-2)

摘　　要：采用扫描电镜和能谱仪检测细小的硅烷化光纤表面微结构成分,表征了光纤与3-氨基丙基-三乙氧基硅烷(APTES)的耦合。能谱分析显示,未硅烷化的光纤表面无碳原子,而硅烷化的光纤表面含有碳原子,其碳原子质量分数为13.74%、16.72%,说明在细小光纤表面上耦合了APTES。经扫描电镜与能谱联用表征光纤表面微结构成分发现,不同表面检测微区域,碳的质量分数不同。探讨了硅烷化的光纤与吖啶橙(AO)的相互作用,并考察了酸性介质对其荧光强度的影响。结果表明:硅烷化的光纤与吖啶橙相互作用发出荧光,证明硅烷化的光纤表面有活性基团;经稀盐酸洗涤后,荧光强度减弱,表明光纤表面的活性基团与AO通过非共价键结合。研究表明,两种方法均能表征细小光纤或纳米光纤与硅烷双功能剂的耦合,以及光纤生物传感器敏感元件的靶分子检测。Microscopic composition and characteristic of the surface of fiber-optic silanized with 10% 3-aminopropyhriethoxysilane（APTES） were analyzed by scanning electron microscopy（SEM） and en- ergy dispersive spectrometry（EDS）. The results showed that no carbon atom was detected on the fiber-optic before it was silanized. However, 13.74% , 16.72% of the mass fraction of carbon was ob- tained, respectively at different surface area of silanization fiber-optic, which indicated that APTES was covalently bonded to the fiber-optic. In addition, the interaction of acridine orange with the active groups on the silanized fibers-optic and the influence of dilute hydrochloric acid to the intensity of fluorescence were investigated. The result showed that the interaction between AO and active groups was noncovalent. Therefore, two methods were effective to characterize the coupling of different silanes and the fiber-optic.

关 键 词：光纤 硅烷化 扫描电镜 能谱分析 微结构成分 

分 类 号：P575.2[天文地球—矿物学] TM452.94[天文地球—地质学]