Thesis
Development of Wearable Physical and Chemical Sensors on Flexible Hybrid Electronics
Washington State University
Master of Science (MS), Washington State University
2022
DOI:
https://doi.org/10.7273/000005045
Abstract
Wearable electronics have the potential to realize personalized medical service, as they can offer continuous monitoring of the health status without disturbing the user’s daily life.1,2 However, wearable devices with conventional rigid electronic materials on soft skin often show measurement instabilities due to a lack of mechanical compliance and reliable sample collection methods. Also, wearable electronics manufacturing has relied on conventional cleanroom-based techniques, requiring specialized equipment with high maintenance costs. Here, we present two types of flexible systems for health monitoring – 1) an electrochemical sensor with a continuous sample collection method and 2) an electrophysiological sensor via a scalable printing method. The first part of this thesis presents a wireless, bioelectronic pacifier for salivary electrolyte monitoring of neonates, which can detect real-time continuous sodium and potassium ion levels without a blood draw. The miniature system facilitates the seamless integration of the ultralight and low-profile device with a commercial pacifier without additional fixtures or structural modifications. The portable device includes ion-selective sensors, flexible circuits, and microfluidic channels, allowing simplified measurement protocols in electrolyte monitoring. The flexible microfluidic channel enables continuous and efficient saliva collection from the mouth. The second part presents fully screen-printable, skin-conformal electrodes for
low-cost and scalable manufacturing of wearable electronics. The screen printing of the polyimide (PI) layer enables facile, low-cost, scalable, high-throughput manufacturing. The serpentine pattern of the screen-printed electrode accommodates natural deformation along the stretching (30 %) and bending conditions (180o), which are verified by computational and experimental studies. Real-time wireless electrocardiogram monitoring is also successfully demonstrated using the printed electrodes with a flexible printed circuit.
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Details
- Title
- Development of Wearable Physical and Chemical Sensors on Flexible Hybrid Electronics
- Creators
- Se hyun Park
- Contributors
- Jong Hoon Kim (Advisor)Xiaolin Chen (Committee Member)Hua Tan (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- School of Engineering and Computer Science (VANC)
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Number of pages
- 106
- Identifiers
- 99901019839701842
- Language
- English
- Resource Type
- Thesis