Title: Flexible and Stretchable Organic Artificial Nervous Systems for Bio-inspired Electronics

Speaker: Tae-Woo Lee, Ph.D., Materials Science and Engineering, Seoul National University (Host : Jinwon Um)

Time: 16:00, February 11 (Mon), 2019

Venue: Room 506, Building E4, DGIST

Abstract : Neuromorphic systems are promising to process complex real-world problems such as visual information, speech recognition, and body movement control based on their compactness, fault tolerance, and high-energy efficiency. Artificial synapses are rapidly emerging for neuro-inspired electronic devices that emulate biological synapses [1]. Mimicking learning and memory functions of the human brain has been a main focus in neuromorphic electronics, but mimicking the complicated biological sensory and motor nervous systems that perform sequential functions related to proprioception, signal processing, and motor response is also a challenging issue especially to realize biomimetic soft robotics and electronics. Herein, we demonstrate flexible and stretchable organic synapses-based sensory and motor nervous systems for bio-inspired electronics [2,3]. Sensory and motor electronic nerves are developed by integrating organic synapses with sensory and motor organs. The sensory organs detect stimuli and fire artificial neural signals which will be transmitted to organic synapses as pre-synaptic action potentials. The flexible and stretchable organic synapses which are favorable for soft robots generate post-synaptic response which will stimulate motor neurons and muscles. Thus, we realize i) a hybrid reflex arc system composed of artificial pressure-sensory nerves and biological motor nerves in a detached insect leg (FIG. 1A) and ii) artificial sensorimotor nervous system composed of an artificial light-sensory organ and electronic neuromuscular system with an artificial muscle (FIG. 1B). In addition, we demonstrate that these neuromorphic systems are promising to develop human/machine interface by distinguishing braille characters and conducting wireless optical communication. Our flexible and stretchable organic synapses-based sensory and motor nervous systems can be used for human-like soft robots and prosthetics which help people with neurological disabilities.

Person in charge : Sora Lee

Contact: srlee@dgist.ac.kr, 053)785-6102