Increased electrical conductivity of peptides through annealing process

Seok Daniel Namgung,Yoon-Sik Lee,Young-O Kim,Jaehun Lee,Taehoon Sung,Ik Rang Choe,Jang-Yeon Kwon,Ki Tae Nam

doi:10.1063/1.4997562

Seok Daniel Namgung, Yoon-Sik Lee + Show 6 more

Open Access

https://doi.org/10.1063/1.4997562

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Journal: APL materials	Publication Date: Aug 1, 2017
Citations: 8	License type: cc-by

Affiliation: Yonsei University, Seoul National University

Abstract

Biocompatible biologically occurring polymer is suggested as a component of human implantable devices since conventional inorganic materials are apt to trigger inflammation and toxicity problem within human body. Peptides consisting of aromatic amino acid, tyrosine, are chosen, and enhancement on electrical conductivity is studied. Annealing process gives rise to the decrease on resistivity of the peptide films and the growth of the carrier concentration is a plausible reason for such a decrease on resistivity. The annealed peptides are further applied to an active layer of field effect transistor, in which low on/off current ratio (∼10) is obtained.

Highlights

Proteins are insulator outside but play important roles in electron and proton conduction in biological systems
We explore the possibility to enhance the electronic conductivity of peptides to advance realization of artificial biological system and human-implantable devices successfully incorporating semi-conductive or conductive peptides
YYACAYY was selected as the starting peptide material to be electrically studied and adopted as an active layer of field effect transistor (FET)

Summary

Introduction

Proteins are insulator outside but play important roles in electron and proton conduction in biological systems. Various types of peptides featuring different length and amino acids components were investigated in terms of resistivity with increasing annealing temperature and fabrication process compatibility (Table S1 of the supplementary material).

Results

Conclusion