Natural Cellulose-Based Flexible Bioimpedance Electrodes for AgriFood Applications
Year: 2025
Type: article
Abstract: This letter presents a monolayer onion epidermis as an ultra-thin substrate for the development of dry electrodes used in electrical impedance spectroscopy (EIS), offering biocompatibility, flexibility, and high fidelity. The dry electrode is fabricated by sputtering a 100 nm layer of molybdenum (Mo) onto the hydrophilic side of the epidermis membrane. Optical characterization confirms the structural integrity and quality of the thin metal film. Electrical characterization reveals a low sheet resistance of 151.28 ±0.08 Ω/sq.m, and experimental EIS studies demonstrate the electrode's enhanced electrical characteristics and capability to acquire impedance spectra from various fruits. Additionally, durability tests over six months show comparable performance to commercial electrodes. This biocompatible electrode offers a promising, cost-effective and sustainable solution with reduced resource utilization, ideal for agrifood and wearable electronics applications.
Source: IEEE Sensors Letters
Institution: Free University of Bozen-Bolzano
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4409494055