Open AccessGallium‐Based Thin Films for Wearable Human Motion Sensors
Author(s) -
Dejace Laurent,
Laubeuf Nathan,
Furfaro Ivan,
Lacour Stéphanie P.
Publication year - 2019
Publication title -
advanced intelligent systems
Language(s) - English
Resource type - Journals
ISSN - 2640-4567
DOI - 10.1002/aisy.201900079
Subject(s) - gallium , materials science , wearable computer , nanotechnology , thin film , wearable technology , robustness (evolution) , computer science , embedded system , metallurgy , biochemistry , chemistry , gene
Wearable electronic circuits based on the films of gallium and its alloys offer promising implementations in health monitoring and gaming sensing applications. However, the complex rheology of liquid metals makes it challenging to manufacture thin gallium‐based devices with reliable, reproducible, and stable properties over time. Herein, the surface coating and topography of silicone substrates are engineered to enable precisely defined, micrometer‐thick liquid metal patterns over large (>10 cm 2 ) surface areas, and high design versatility. Control over the film microstructure meets manufacturing conditions that enable gallium films with a precise, repeatable, and durable electromechanical performance. The robustness and applicability of this technology in a virtual‐reality scenario is demonstrated by implementing thin, soft, and stretchable gallium‐based sensors to accurately monitor human hand kinematics.