Seminar & Colloquium
[세미나: 5월 13일(월), 오전 10시 30분] Dr. Jinwook Baek, Purdue University
Title
Design Rules for Mold-Free, 3D Printing-Assisted Pressure Sensor Manufacturing: Achieving Broad Pressure Response Range
Speaker
Dr. Jinwook Baek, Postdoctoral researcher in School of Engineering Technology, Purdue University
* Education
- 2014. 03. ~ 2019. 02. Ph.D. in Materials Science and Engineering, KAIST, Republic of Korea
- 2012. 09. ~ 2014. 02. M.S. in Materials Science and Engineering, KAIST, Republic of Korea
- 2005. 02. ~ 2012. 08. B.S. in Materials Science and Engineering, KAIST, Republic of Korea
* Experience
- 2022. 07. ~ present Postdoctoral Research Assistant, School of Engineering Technology, Purdue University, United States
- 2021. 01. ~ 2022. 07. Postdoctoral Researcher, Korea Research Institute of Standards and Science (KRISS), Republic of Korea
- 2019. 03. ~ 2020. 12. Postdoctoral Research Scholar, Department of Materials Science and Engineering, KAIST, Republic of Korea
| Date | Monday May 13th , 2024
| Time | 10:30 ~
| Venue | 33동 223호
[Abstract]
Recent advancements in 3D printing technology have extended its application to the manufacturing of piezoresistive pressure sensors. Leveraging the cost-effectiveness, streamlined manufacturing processes, and enhanced design flexibility inherent in 3D printing, tailored sensor fabrication becomes feasible to meet specific performance requirements. Despite initial demonstrations, the utilization of 3D printing in pressure sensors has been primarily limited to creating molds for transferring patterns onto flexible substrates, resulting in restricted engineering material options and sensor performance. Thus, establishing effective design strategies is essential to fully leverage the capabilities of 3D printing in advanced pressure sensor manufacturing, particularly in engineering figures of merit performance. This study proposes a universal design strategy aimed at sustaining high sensitivity across a broad pressure range, a feat typically observed only at lower pressure levels but often diminished at higher pressures. We introduce a novel approach by engineering the deformability of 3D printed structures to achieve a linear increase in the contact area without reaching saturation. The most deformable sensors, characterized by high elongation and low stiffness, exhibit a remarkable sensitivity of 162.5 kPa-1 and maintain such high sensitivity up to 300 kPa. Mechanistic investigations conducted through finite element analysis confirm that engineered deformability in the sensor structure is pivotal for achieving enhanced linear response over a broad pressure range. We anticipate these findings will be invaluable for technologies necessitating robust sensing capabilities in high-pressure environments, such as deep-sea exploration and space missions. Furthermore, the design principles we explored for optimizing the sensor's primary figure of merits are poised to underpin the seamless integration of 3D printing into sensor technology.
| Host | 유웅열 교수(02-880-9096)