期刊
MATERIALS HORIZONS
卷 7, 期 3, 页码 866-876出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9mh01798d
关键词
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资金
- MOE AcRF 1 [R-284-000-161-114]
- Biotechnology and Biological Sciences Research Council (BBSRC) [BB/I022570/1]
- BrisSynBio Synthetic Biology Research Centre at the University of Bristol - BBSRC [BB/L01386X/1]
- Engineering and Physical Sciences Research Council (EPSRC) of the UK
- BBSRC [BB/L01386X/1, BB/I022570/1] Funding Source: UKRI
Human-machine interfaces in emerging smart-skin technologies tend to be focussed towards high-sensitivity tactile sensing primarily with visual/numerical feedback, and research on e-skin technologies for the visually impaired is sparse. Here we demonstrate a proof-of-concept six-pixel tactile sensor that converts touch stimuli based on braille codes into an auditory output, and which could potentially be miniaturized as an 'energy-autonomous on-skin e-braille reader' for the visually impaired. By applying the concepts of electric double layer capacitance and bio-photo capacitance, a self-powered sensor is constructed that generates electrical signals as large as 2 V by modulating a bio-electrochemical liquid bridge between electrodes of opposite wetting characteristics. The liquid bridge, composed of photosynthetic pigment-proteins with a redox electrolyte, both augments the sensory response and serves as a standalone solar-capacitor that can generate a photocurrent as high as 140 mu A cm(-2), and which displays a long discharge time of similar to 20 min with just similar to 3 min of photo charging.
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