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Electrospinning of Porphyrin/Polyvinyl Alcohol (PVA) Nanofibers and Their Acid Vapor Sensing Capability

Title
Electrospinning of Porphyrin/Polyvinyl Alcohol (PVA) Nanofibers and Their Acid Vapor Sensing Capability
Author
안희준
Keywords
Electrospinning; Polyvinyl Alcohol; Porphyrin; Sensor
Issue Date
2011-07
Publisher
Amer Scientific Publishers
Citation
Journal of Nanoscience and Nanotechnology, 2011, 11(7), P.6102-6108
Abstract
Fluorescing 5,10,15,20-terakis(1-methyl-4-pyridinio)porphyrin tetra(p-toluenesulfonate) (TMPyP)-embedded and -coated polyvinyl alcohol (PVA) nanofibers were fabricated by using the electrospinning technique. To improve nonpolar solvent solubility of TMPyP/PVA nanofibers, tetraethyl orthosilicate (TEOS) was used as a cross-linking agent. UV-vis spectroscopy showed a strong Q band and two relatively weak Soret bands from the TMPyP/PVA nanofibers, and revealed that the TMPyP molecules were homogeneously loaded to the fibers. Scanning electron microscopy revealed that the electrospun nanofibers had ultrafine structures with an average diameter of ca. 250 nm. X-ray photoelectron spectroscopy confirmed the compositional structure of TMPyP/PVA/TEOS nanofibers and revealed the relative coverage of TMPyP molecules on the surface of TMPyP-embedded and TMPyP-coated PVA/TEOS fibers. For the comparison of the acid vapor sensitivity, TMPyP-embedded PVA/TEOS films, and TMPyP-embedded PVA/TEOS fibers, TMPyP-coated PVA/TEOS fibers were exposed to 1N nitric-acid vapor for 20-60 seconds. Fluorescence microscopy revealed that TMPyP-coated PVA/TEOS nanofibers exhibited better acid-sensing capability than TMPyP-embedded PVA/TEOS nanofibers and films.
URI
http://www.ingentaconnect.com/content/asp/jnn/2011/00000011/00000007/art00091http://repository.hanyang.ac.kr/handle/20.500.11754/72917
ISSN
1533-4880
DOI
10.1166/jnn.2011.4458
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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