Journal
ADVANCED INTELLIGENT SYSTEMS
Volume 2, Issue 7, Pages -Publisher
WILEY
DOI: 10.1002/aisy.202000088
Keywords
inkjet printing; iontronics; stretchable; touch sensors; transparent
Funding
- Competitive Research Program under the National Research Foundation, Prime Minister's Office, Singapore [NRF-CRP13-2014-02]
- NRF Investigatorship under the National Research Foundation, Prime Minister's Office, Singapore [NRF-NRFI2016-05]
- Nanyang Technological University, Singapore
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Next-generation soft electronics are expected to be intrinsically stretchable, skin conformable, and fully integrated with diverse receptive modules to facilitate bidirectional human-machine interactions. Receptive touch sensors, in particular, should provide stable touch sensing outputs without being affected by external force-induced strains. Herein, the design and fabrication of an iontronic touch sensing matrix, based on the fringe-field capacitive mechanism, are introduced for robust touch mapping under large deformation. Enabled by our well-formulated ink, ionic gel electrodes are directly inkjet printed onto elastomeric substrate to impart superior transparency and elasticity, and hybridized with a customized electronic circuitry through electrical double layers (EDLs) for the multiplexing and transduction of capacitive signals. Notably, the coplanar interlocking-diamond electrode layout in a stretchable modality is adopted for the first time, which helps to boost touch sensitivity and suppress strain-induced artifacts under static/dynamic deformations. For practical applications, the iontronic matrix demonstrates the capabilities of proximity sensing, multitouch detection, and gesture communication in real time, leading to a robust touch sensing interface that captures high-fidelity signals during complex human-machine interactions.
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