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Diphenylacetylene Polymer Nanofiber Mats Fabricated by Freeze Drying: Preparation and Application for Explosive Sensors
Author(s) -
Lee WangEun,
Oh ChangJin,
Kang InnKyu,
Kwak Giseop
Publication year - 2010
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.201000216
Subject(s) - diphenylacetylene , nanofiber , polymer , materials science , chemical engineering , explosive material , polymer chemistry , electrospinning , fluorescence , quenching (fluorescence) , nanotechnology , chemistry , composite material , organic chemistry , optics , physics , engineering , catalysis
Finely structured diphenylacetylene polymer nanofibers were successfully prepared by a freeze drying method. SEM revealed that the morphology and structure of the fibers were significantly dependent on the concentration of the polymer solution, the ‘frozen in’ quenching temperature and the chemical structure of the polymer derivatives. Polarized fluorescence spectroscopy revealed that the polymer chains within the nanofiber were uniaxially oriented and highly elongated. The polymer nanofiber was remarkably sensitive to explosive nitroaromatic compounds when compared to the corresponding thin films. The fluorescence of polymer nanofiber obtained from 0.003 wt.‐% cryogenic benzene solution rapidly decreased to 50% of its initial value in ≈35 s by exposing to 2,4‐dinitrotoluene.