# Liquid–Liquid Interface Polar Engineering for Organic Piezoelectrics

## TL;DR

A new method called liquid–liquid interface polar engineering improves organic piezoelectric materials by boosting their performance while keeping them flexible for use in biomechanical applications.

## Contribution

The novel approach of liquid–liquid interface polar engineering is introduced to enhance piezoelectric properties in organic materials.

## Key findings

- Liquid–liquid interface polar engineering enables precise control over molecular assembly and phase separation.
- This method induces high piezoelectric polarization while maintaining mechanical compliance in organic materials.

## Abstract

Organic piezoelectric materials have garnered increasing interest for biomechanical applications; however, their practical appeal has been limited by low piezoelectricity and low mechanical compliance. Recently, liquid–liquid interface polar engineering has emerged as a promising strategy to overcome these limitations. By utilizing polarity asymmetry at the liquid–liquid interface, this strategy enables precise control over molecular assembly and phase separation, thereby inducing high piezoelectric polarization of organic materials while maintaining their intrinsic mechanical compliance. This breakthrough paves the way for developing organic piezoelectric materials that exhibit both high piezoelectricity and high mechanical compliance, advancing their potential in biomechanical sensing, actuating, and energy harvesting.