| 학회 |
한국재료학회 |
| 학술대회 |
2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 |
22권 2호 |
| 발표분야 |
E. 환경/센서 재료 분과 |
| 제목 |
Flexible Inorganic-based Piezoelectric Acoustic Nanosensors Inspired by Human Cochlea |
| 초록 |
For patients who suffer from sensorineural hearing loss (SNHL) by damaged or loss of hair cells in the cochlea, biomimetic artificial cochleae to overcome the disadvantages of existing implant systems have been widely studied. In this work, a novel concept of flexible inorganic-based piezoelectric acoustic nanosensor (iPANS) for the purpose of a biomimetic artificial hair cell to mimic the functions of the original human hair cells is introduced. A trapezoidal silicon-based membrane (SM) mimics the function of the natural basilar membrane for frequency selectivity, and a flexible iPANS is fabricated on the SM utilizing a laser lift-off technique to overcome the brittle nature of the inorganic piezoelectric materials. The vibration amplitude vs piezoelectric sensing signals are theoretically examined based on the experimental conditions by finite element analysis method. The SM is successful at separating the audible frequency range of incoming sound, vibrating distinctively according to varying locations of different sound frequencies, thus allowing iPANS to convert tiny vibration displacement of ≈15 nm into an electrical sensing output of ≈55 μV, which is close to the simulation result. This conceptual iPANS of flexible inorganic piezoelectric materials could open the new fields of nature-inspired biomimetic systems using inherently high piezoelectric charge constants than those of organic polymer-based piezoelectric materials. |
| 저자 |
Jae Hyun Han, Daniel Juhyung Joe, Keon Jae Lee
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| 소속 |
KAIST |
| 키워드 |
Biomimetics; Piezoelectric acoustic nanosensor; Sensorineural hearing loss (SNHL); Artificial hair cell; Frequency separation
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| E-Mail |
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