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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/12061

Title: Enhancement of Proton Transport in an Oriented Polypeptide Thin Film
Authors: Nagao, Yuki
Matsui, Jun
Abe, Takashi
Hiramatsu, Hirotsugu
Yamamoto, Hitoshi
Miyashita, Tokuji
Sata, Noriko
Yugami, Hiroo
Keywords: Proton transport of peptide
Highly oriented thin film
Carboxylic acid
Issue Date: 2013-05-30
Publisher: American Chemical Society
Magazine name: Langmuir
Volume: 29
Number: 23
Start page: 6798
End page: 6804
DOI: 10.1021/la400412f
Abstract: Proton transport properties of a partially protonated poly(aspartic acid)/sodium polyaspartate (P-Asp) were investigated. A remarkable enhancement of proton conductivity has been achieved in the thin film. Proton conductivity of 60-nm-thick thin film prepared on MgO(100) substrate was 3.4 × 10^<–3> S cm^<–1> at 298 K. The electrical conductivity of the oriented thin film was one order of magnitude higher than the bulk specimen and the activation energies for the proton conductivity were 0.34 eV for the oriented thin film and 0.65 eV for the pelletized sample. This enhancement of the proton transport is attributable to the highly oriented structure on MgO(100) substrate. This result proposes great potential for a new strategy to produce a highly proton-conductive material using the concept of an oriented thin film structure without strong acid groups.
Rights: Yuki Nagao, Jun Matsui, Takashi Abe, Hirotsugu Hiramatsu, Hitoshi Yamamoto, Tokuji Miyashita, Noriko Sata, and Hiroo Yugami, Langmuir, 2013, 29(23), pp.6798-6804. This document is the unedited author's version of a Submitted Work that was subsequently accepted for publication in Langmuir, copyright (c) American Chemical Society after peer review. To access the final edited and published work, see [http://pubs.acs.org/articlesonrequest/AOR-xP7dB8mqYiEqgIgNAej4].
URI: http://hdl.handle.net/10119/12061
Material Type: author
Appears in Collections:c10-1. 雑誌掲載論文 (Journal Articles)

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