Organic semiconductors-coated polyacrylonitrile(PAN) electrospun nanofibrous mats for highly sensitive chemosensors via evanescent-wave guiding effect  

作　　者：Kang-Yi Hua Chang-Min Deng Chao He Li-Qi Shi De-Feng Zhu Qing-Guo He Jian-Gong Cheng 

机构地区：[1]State key of Transducer Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Science [2]Graduate School of Chinese Academy of Sciences

出　　处：《Chinese Chemical Letters》2013年第7期643-646,共4页中国化学快报（英文版）

基　　金：the financial support from the National Natural Science Foundation of China(Nos.51003118, 21273267);the Research Programs from the Ministry of Science and Technology of China(No.2012BAK06B03);the Shanghai Science and Technology Committee(No.11JC1414700);the Open Research Fund of State Key Laboratory of Bioelectronics, Southeast University

摘　　要：We report the first use of organic semiconductors （OSCs）-coated PAN nanofibrous mats as highly responsive fluorescence quenching-based chemosensors for 2,4,6-trinitrotoluene （TNT） and H2O2 detection in vapor phase. Conjugated polymers, poly（triphenylaminealt-biphenylene vinylene） （TPA- PBPV）, and small organic molecules, l-horonic-ester pyrene and 1,6-bisboron-ester pyrene, were coated onto the nanofibers fabricated by electrospinning. By introducing the nanofibers structure, a 9-fold fluorescence intensity enhancement and a 14-fold sensitivity enhancement were achieved, which could be attributed to its high area-to-volume ratio, excellent gas permeability, and more importantly, the evanescent-wave effect occurred once the diameters of the fibers were small enough. Since the organic semiconductors coated onto the nanofibrous mats could be replaced by other functional materials, the nanofibers-enhanced detection strategies could be extended to more general domains including chemical and environmental detection.We report the first use of organic semiconductors （OSCs）-coated PAN nanofibrous mats as highly responsive fluorescence quenching-based chemosensors for 2,4,6-trinitrotoluene （TNT） and H2O2 detection in vapor phase. Conjugated polymers, poly（triphenylaminealt-biphenylene vinylene） （TPA- PBPV）, and small organic molecules, l-horonic-ester pyrene and 1,6-bisboron-ester pyrene, were coated onto the nanofibers fabricated by electrospinning. By introducing the nanofibers structure, a 9-fold fluorescence intensity enhancement and a 14-fold sensitivity enhancement were achieved, which could be attributed to its high area-to-volume ratio, excellent gas permeability, and more importantly, the evanescent-wave effect occurred once the diameters of the fibers were small enough. Since the organic semiconductors coated onto the nanofibrous mats could be replaced by other functional materials, the nanofibers-enhanced detection strategies could be extended to more general domains including chemical and environmental detection.

关 键 词：Electrospinning Nanofiber Evanescent wave Sensor Vapor 

分 类 号：TN304.5[电子电信—物理电子学] TP212.2[自动化与计算机技术—检测技术与自动化装置]