A biomimetic microchannel wearable sensing patch for enriching trace body fluids and promoting spatial circulation

Abstract

Wearable patches, as an advanced biosensing technology, possess significant innovative potential and market value in the realms of self-diagnosis and wearable devices. This study introduces a microchannel wearable sensing patch (MWSP) inspired by biomimetic structures that replicate the functions of plant roots, stems, veins, and leaves. This patch facilitates micro-collection, rapid enrichment, and transpiration circulation of sweat on the skin's surface, enabling accurate detection of blood glucose levels in human sweat. Experimental results demonstrate that this biomimetic MWSP exhibits a high sensitivity of 5.55 μA mM−1 cm−2 for detecting glucose concentrations. Furthermore, the anti-gravity unidirectional flow guiding membrane, which simulates leaf transpiration, effectively enhances local microcirculation of plaques and boosts evaporation efficiency by 5.83 times. This biomimetic patch presents opportunities for the advancement of wearable sensing technology.