Affiliation:
1. School of Chemical and Biological Engineering Institute of Chemical Processes Seoul National University 1 Gwanak‐ro, Gwanak‐gu Seoul 08816 Republic of Korea
Abstract
AbstractA stretchable electronic substrate with strategically positioned rigid and soft islands offers a significant platform to overcome the limitations of current stretchable substrates. This design facilitates the integration of conventional rigid electroactive materials into high‐performance stretchable electronics. This study introduces a photo‐crosslinkable, transparent elastomer substrate based on acrylates. When exposed to UV irradiation, it undergoes selective crosslinking (with crosslinking density and modulus depending on the number of crosslinkers); it can achieve a modulus increase of up to 38 000%. Rigid regions of specific shapes and sizes can be created using a photomask, while soft regions remain intact for expansion during stretching. The substrate is used to produce a capacitive strain/strain‐insensitive pressure (SIP) sensor in which rigid islands act as the dielectric layer of the capacitor; sensitivity to external stimuli is modulated by the modulus of the rigid islands. In addition, a high‐efficiency SIP sensor (SIPS) employing an electrospun dielectric layer, which amplifies the pressure sensitivity by 780‐fold, is developed, ensuring a constant low strain sensitivity.
Funder
National Research Foundation of Korea
Korea Toray Science Foundation
Subject
Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials