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Fabrication, structural characterization and sensing properties of polydiacetylene nanofibers templated from anodized aluminum oxide

Permanent URL:
http://handle.nal.usda.gov/10113/49629
File:
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Abstract:
Polydiacetylene (PDA), as a unique conjugated polymer, has shown its potential in the application of chem/bio-sensors and optoelectronics. In this work, we first infiltrated PDA monomer (10, 12-pentacosadiynoic acid, PCDA) melt into anodized aluminum oxide template, and then illuminated the infiltrated template with UV light to initiate the polymerization of PCDA. After etching away the aluminum oxide templates, we obtained solid poly-PCDA nanofibers. We found that even tightly confined in template pores with diameter as small as not, vert, similar35 nm, PCDA crystals were able to be polymerized through a solid polymerization mechanism induced by UV light. Poly-PCDA nanofibers, both in the released form and embedded in the template, showed characteristic blue to red color change in sensing exposure of organic solvents and temperature increasing, and the red colored fibers possessed strong fluorescence. Moreover, poly-PCDA nanofibers were highly crystalline, and oriented favorably in some certain direction due to the confinement of nanopores, as demonstrated by X-ray diffraction texture analysis and orientation distribution analysis by scanning confocal optical microscopy.
Author(s):
Tong, Ling , Cheng, Bowen , Liu, Zengshe , Wang, Yong
Subject(s):
nanofibers , aluminum oxide , sensors , polymers , ultraviolet radiation , polymerization , color , solvents , temperature , fluorescence , nanocrystals , X-ray diffraction , scanning electron microscopy
Format:
p. 584-591.
Note:
Includes references
Source:
Sensors and actuators. B, Chemical 2011 July 20, v. 155, no. 2
Language:
English
Year:
2011
Collection:
Journal Articles, USDA Authors, Peer-Reviewed
Rights:
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.