# Convenient Preparation of PEDOT-Based Conductive Fabrics via a Green Strategy for Morse Code Recognition

## TL;DR

This paper introduces a green method to create conductive fabrics for smart wearable devices that can recognize Morse code.

## Contribution

A novel green strategy for PEDOT-based conductive fabric synthesis with optimized electrical conductivity.

## Key findings

- Optimal conductive performance achieved with an EDOT to PSS ratio of 1:2 (3.27 KΩ cm−1).
- Conductive fabrics can be used in pressure and temperature sensors to transmit Morse code.
- The method shows potential for producing PEDOT composites for smart wearable devices.

## Abstract

With the rapid development of Internet of Things (IoT) and bioscience technology, wearable smart devices are developing toward advanced trends such as flexibility, convenience and environmental-friendliness. Poly (p-styrenesulfonic acid) (PSS), as a common template and dispersant, is indispensable in the polymerization of conductive polymers. However, the doping amount of PSS has a significant effect on the electrical conductivity of the polymer. Herein, different molar quantities of PSS were used to assist the polymerization of 3,4-ethylenedioxythiophene (EDOT) monomer in a horseradish peroxidase/hydrogen peroxide (HRP/H2O2) low-temperature system to obtain conductive finishing solutions with more excellent electrical properties. Then, the polyester nonwoven fabric was immersed in the conductive finishing solution, and when the addition ratio of EDOT and PSS was 1:2, the conductive performance was optimal (3.27 KΩ cm−1). Finally, the conductive fabric was assembled into a pressure sensor and a temperature sensor, which can transmit Morse code in the form of single-parameter (pressure response or temperature response) or collaboration. Overall, this research has great potential for production of poly(3,4-ethylenedioxythiophene) (PEDOT)-based composites and their applications in smart wearable device.