Intrinsically Polar Piezoelectric Self-Assembled Oligopeptide Monolayers

19 February 2021, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Flexible, bio-compatible piezoelectric materials are of considerable research interest for a variety of applications, but many suffer from low response or high cost to manufacture. Herein, novel piezoelectric force and touch sensors based on self-assembled monolayers of oligopeptides are presented which produce large piezoelectric voltage response and are easily manufactured without the need for electrical poling. While the devices generate modest piezoelectric charge constants (d33) of up to 9.8 pC N−1, they exhibit immense piezoelectric voltage constants (g33) up to 2 V m N−1. Furthermore, a flexible device prototype is demonstrated that produces open-circuit voltages of nearly 6 V under gentle bending motion. Improvements in peptide selection and device construction promise to further improve the already outstanding voltage response and open the door to numerous practical applications.

Keywords

Piezoelectricity
Piezoelectric Voltage Constant
self-assembled monolayer
poling-free
flexible

Supplementary materials

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Description
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si
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g33 MWE
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