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Enhancement of Proton Transport in an Oriented Polypeptide Thin Film

Nagao, Yuki and Matsui, Jun and Abe, Takashi and Hiramatsu, Hirotsugu and Yamamoto, Hitoshi and Miyashita, Tokuji and Sata, Noriko and Yugami, Hiroo (2013) Enhancement of Proton Transport in an Oriented Polypeptide Thin Film. Langmuir, 29, pp. 6798-6804. American Chemical society (ACS). DOI: 10.1021/la400412f ISSN 0743-7463



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 1 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, respectively. 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.

Item URL in elib:https://elib.dlr.de/84923/
Document Type:Article
Title:Enhancement of Proton Transport in an Oriented Polypeptide Thin Film
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Nagao, YukiSchool of Materials Science, Japan Advanced Institute of Science and TechnologyUNSPECIFIED
Matsui, JunInstitute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku UniversityUNSPECIFIED
Abe, TakashiGraduate School of Science and Technology, Niigata UniversityUNSPECIFIED
Hiramatsu, HirotsuguGraduate School of Pharmaceutical Sciences, Tohoku UniversityUNSPECIFIED
Yamamoto, HitoshiDepartment of Safety and Hygiene, Osaka UniversityUNSPECIFIED
Miyashita, TokujiInstitute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku UniversityUNSPECIFIED
Sata, NorikoInstitute of Technical Thermodynamics, German Aerospace Center (DLR)UNSPECIFIED
Yugami, HirooGraduate School of Engineering, Tohoku UniversityUNSPECIFIED
Date:30 May 2013
Journal or Publication Title:Langmuir
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1021/la400412f
Page Range:pp. 6798-6804
Publisher:American Chemical society (ACS)
Keywords:proton transport, polypeptide thin film, PEFC, infrared reflection absorption spectroscopy
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Fuel Cells (old)
DLR - Research area:Energy
DLR - Program:E EV - Energy process technology
DLR - Research theme (Project):E - Elektrochemische Prozesse (old)
Location: Stuttgart
Institutes and Institutions:Institute of Engineering Thermodynamics > Electrochemical Energy Technology
Deposited By: Metzger-Sata, Dr. Noriko
Deposited On:30 Oct 2013 12:17
Last Modified:31 Jul 2019 19:42

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