Citation: Kang-Yi Hua, Chang-Min Deng, Chao He, Li-Qi Shi, De-Feng Zhu, Qing-Guo He, Jian-Gong Cheng. Organic semiconductors-coated polyacrylonitrile (PAN) electrospun nanofibrous mats for highly sensitive chemosensors via evanescent-wave guiding effect[J]. Chinese Chemical Letters, ;2013, 24(07): 643-646. shu

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

Kang-Yi Hua ^a,b ,
Chang-Min Deng ^a,b ,
Chao He ^a,b ,
Li-Qi Shi ^a,b ,
De-Feng Zhu ^a ,
Qing-Guo He ^a,, ,
Jian-Gong Cheng ^a,,

1.
a State key of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Science, Shanghai 200050, China;
2.
b Graduate School of Chinese Academy of Sciences, Beijing 100039, China

Corresponding author: Qing-Guo He, Jian-Gong Cheng,
Received Date: 23 January 2013
Available Online: 16 April 2013

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) (TPAPBPV), and small organic molecules, 1-boronic-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.
- Electrospinning,
- Nanofiber,
- Evanescent wave,
- Sensor,
- Vapor
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