55 0

Synthesis of ultra-thin polypyrrole nanosheets for chemical sensor applications

Title
Synthesis of ultra-thin polypyrrole nanosheets for chemical sensor applications
Author
윤종승
Keywords
Chemical sensor; Nanosheet; Polypyrrole
Issue Date
2011-02
Publisher
Elsevier Ltd
Citation
In Polymer 2011 52(3):652-657
Abstract
Ultra-thin polypyrrole nanosheets (UPNSs) are fabricated by organic crystal surface-induced polymerization (OCSP) of pyrrole in an aqueous suspension containing hydrated crystals of sodium decylsulfonate (C10SO3Na) below the Krafft temperature using FeCl3 as an oxidant. The hydrated C10SO3Na crystals are used as templates through electrostatic binding of the cationic polypyrrole (PPy) chains oxidized by Fe(III) ions on the anionic C10SO3Na crystal surface. The resulting UPNSs have a single layer thickness of ∼21 nm, widths between 2 and 6 μm, and lengths greater than 10 μm. The UPNSs are composed of a single continuous PPy domain. Moreover, the UPNSs exhibit higher conductivity (30.6 Scm?1) and longer conjugation lengths than the PPy nanoparticles (2.4 Scm?1) prepared using emulsion polymerization. We systematically investigate the UPNSs as gas sensors for detecting and quantifying toxic gases such as HCl and NH3. The UPNSs exhibit much higher gas sensitivity and faster response times compared with the PPy nanoparticles.
URI
http://www.sciencedirect.com/science/article/pii/S003238611001089X?via%3Dihub
ISSN
0032-3861
DOI
10.1016/j.polymer.2010.12.021
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE