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Gel-based Artificial Photonic Skin to Sense a Gentle Touch by Reflection Fan Hu, Lin Zhang, Wenzhe Liu, Xiaoxiao Guo, Lei Shi, and Xiang Yang Liu ACS Appl. Mater. Interfaces, Just Accepted Manuscript • DOI: 10.1021/acsami.9b01649 • Publication Date (Web): 15 Apr 2019 Downloaded from http://pubs.acs.org on April 15, 2019
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ACS Applied Materials & Interfaces
Gel-based Artificial Photonic Skin to Sense a Gentle Touch by Reflection Fan Hu,†,‡ Lin Zhang,† Wenzhe Liu,§ Xiaoxiao Guo,† Lei Shi,*,§ and Xiang Yang Liu*,†,⊥
†Research
Institute for Biomimetics and Soft Matter, College of Materials, College of Physical
Science and Technology, Xiamen University, Xiamen 361005, P. R. China Email:
[email protected] ‡Advanced
Soft Matter Group, Department of Chemical Engineering, Delft University of Technology, Van der Maasweg 9, 2629 HZ Delft, The Netherlands
§Department
of Physics, Key Laboratory of Micro- and Nano-Photonic Structures (Ministry of
Education), and State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433, P. R. China Email:
[email protected] ⊥Department
of Physics, National University of Singapore, 2 Science Drive 3, 117542 Singapore, Singapore
KEYWORDS: artificial photonic skin (p-skin), gel, tactile sensing, reflection, photonic crystal
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ABSTRACT
This work demonstrates that engineering three-dimensional photonic crystal (3DPC) structure in highly flexible gel is a potential method to achieve flexible tactile artificial photonic skin (p-skin) for future visible light communication (VLC). We investigated the photonic output modes of 3DPC-coated gel-based pressure sensors and explored their ability to sense low pressures (< 10 kPa) through reflection. Such sensors with high sensitivity, fast response and adjustable detection range can be fabricated in arrays of dots covering large, complex/uneven surfaces, and are promising in the development of stimuli-responsive soft materials for future artificial intelligence, health monitoring and photonic communication systems.
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ACS Applied Materials & Interfaces
The development of flexible, sensitive artificial skins that can respond to tactile stimuli in the environment are of paramount importance for future generations of smart robots, implantable artificial skins and physiological monitoring systems. As an uncommon tactile sensing technology, artificial photonic skin (p-skin) devices have a number of advantages, not only supported by rapidly developing techniques in applied spectroscopy, but also fueled by the need for advanced photonic communications. In addition, p-skin devices offer a high degree of stability because they are far less susceptible to corruption by environmental influences such as electromagnetic fields than electrical/magnetic devices. Therefore, we focus on the p-skin technology in this article. However, the majority of reported photonic pressure sensors have shown low sensitivity, slow recovery (in minutes or more), large hysteresis, and poor flexibility and moldability in low-pressure regimes (
