Date
Place
- Room H (Room Hall 1, 1F)
- P1. Poster Session I
- August 20, 2015 (Thursday)
- 14:00 ~ 15:30
- [P1-19]
- 14:00 ~ 15:30
- Title:Highly Sensitive, Wearable, and Multimodal All-Carbon Electronic Skin Capable of Simultaneously Detecting Tactile and Biological Stimuli
- So Young Kim, Sangsik Park, Do Hyung Park, Han Wool Park, and Do Hwan Kim (Soongsil Univ., Korea)
Abstract: We have developed a highly sensitive, wearable, and multi-stimuli responsive artificial all-carbon skin using hierarchically engineered elastic and highly conductive carbon nanotube fabrics, i.e., CNT microyarns. The sensor skin is capable of simultaneously detecting heterogeneous versatile external subtle stimuli such as tactile, touch, temperature, humidity, and even biological variables into a single pixel. We utilized piezocapacitive-type and all-carbon device architecture that consists of highly stretchable CNT microyarn circuitry incorporated with stretchable elastomer dielectric onto PDMS substrates, where CNT microyarns were aligned to allow point-to-point overlap for implementing high sensitivity as well as high spatial resolution of the sensors. Based on this type of capacitive sensory system, we could successfully demonstrate highly sensitive and reliable tactile sensor arrays to allow position detection under even an ultralow pressure of 0.4Pa and exhibit fast response time of 63ms. In particular, effective multimodal output electric signals could be manipulated as a change of resistance or capacitance under mechanical deformations, touch, temperature, humidity variation, which physiologically enables the communication of feelings and emotions through skin-to-skin contact similar to that of human skin. Moreover, each pixel could detect and even discern input signals derived from versatile chemical fluids with different dipole moments or pH.
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