S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Mechanical Aerospace Engineering (기계항공공학부) Theses (Ph.D. / Sc.D._기계항공공학부)
Ultrasensitive sensor design based on controlled crack formation
제어된 기계적 파단을 이용한 초고감도 센서 제작
- 공과대학 기계항공공학부
- Issue Date
- 서울대학교 대학원
- 학위논문 (박사)-- 서울대학교 대학원 : 기계항공공학부, 2017. 2. 최만수.
- In this thesis, we describe crack sensor systems inspired by spiders slit organ. Firstly, we present a sensor based on the guided formation of straight mechanical cracks within a regular micro-scale pattern. The sensor is highly sensitive to pressure (sensitivity = ~ 1 × 105 at pressures of 8-9.5 kPa range) as well as strain (GF = ~ 2 × 106 at strains of 0-10% range). Secondly, we present crack sensor based on a cracked transparent epilayer, Indium-Tin Oxide (ITO), deposited on a transparent PET substrate, which exhibits ultra-high sensitivity to strain, (GF = ~ 4000 at 2% strain), to pressure (sensitivity = 1.91 kPa-1 at pressure from 30 to 70 kPa), and transparency (89% at wavelength of 560 nm). Theoretical description, durability and reproducibility have also been demonstrated for each case.