Conductive Peptide‐Based MXene Hydrogel as a Piezoresistive Sensor

Abstract

Wearable pressure sensors have become increasingly popular for personal healthcare and motion detection applications due to recent advances in materials science and functional nanomaterials. In this study, we present a novel composite hydrogel as a sensitive piezoresistive sensor that can be utilized for various biomedical applications, such as wearable skin patches and integrated artificial skin that can measure pulse and blood pressure, as well as monitor sound as a self‐powered microphone. The hydrogel is composed of self‐assembled short peptides containing aromatic, positively‐ or negatively charged amino acids combined with 2D Ti3C2Tz MXene nanosheets. This material is low‐cost, facile, reliable, and scalable for large areas while maintaining high sensitivity, a wide detection range, durability, oxidation stability, and biocompatibility. The bioinspired nanostructure, strong mechanical stability, and ease of functionalization make the assembled peptide‐based composite MXene‐hydrogel a promising and widely applicable material for use in bio‐related wearable electronics.This article is protected by copyright. All rights reserved

Electronic Skin for Health Monitoring Systems: Properties, Functions, and Applications

“…Reproduced with permission. [301] Copyright 2024, Wiley-VCH. b) Schematic illustration of the self-powered temperature sensor used to monitor the excise of pregnant woman i).…”

“…For example, Adler-Abramovich et al prepared a piezoresistive sensor with high sensitivity to monitor pulse and BP (Figure 10a). [301] HR could be calculated by the number of pulse waves per minute recorded by a sensor on the wrist. By analyzing typical systolic peak (P 1 ) and diastolic peak (P 2 ) in Figure 10a(iii), parameters, such as radial artery augmentation index and arterial stiffness, could be obtained to evaluate the BP.…”