Physical Chemistry

Intrinsically Polar Piezoelectric Self-Assembled Oligopeptide Monolayers

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.

Content

Thumbnail image of PeptidePiezoSAMs.pdf

Supplementary material

Thumbnail image of si.pdf
si
Thumbnail image of g33_MWE.py
g33 MWE