Tey Ju Nie
Tey Ju Nie, Scientist, Singapore Institute of Manufacturing Technology
Printed flexible dry ECG electrodes for wearable application
Tey Ju Nie (1,*) , Joseph Chen Sihan (1,2) , Yusoff Bin Ismail (1) , Lok Boon Keng (1) , Wei Jun (1)
(1) Large Area Processing Programme, Singapore Institute of Manufacturing Technology, 73 Nanyang Drive, 637662, Singapore
(2) School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave, Block N3, 639798, Singapore
The ageing world population, increase of chronic disease due to lifestyle change, and rising health awareness among society have triggered the revolution in healthcare industry to alter the current healthcare system from inpatient settings to outpatient cares through individual self-monitoring. The boom in wearable technology closed the gap by enabling continuous vitals monitoring function to be incorporated through wearable products into patient’s daily life with minimal impact to patient’s daily activity .
One of the wearables product in the market today for ECG monitoring is a chest strap design with rubberized conductive electrodes to capture the electrical signals from heart activity.In this paper, we looked into reducing the form factor of existing rubberized electrode by developing printed flexible dry carbon electrode with thinner and better flexibility for user’s comfort using large area process technologies .
Several commercial carbon paste were attempted. Nevertheless, even though the as-printed electrodes exhibited excellent conductivity with sheet resistance in the range of 160-300 ohms,the resistance value multifold after washing ((ISO 6330 test standard), deemed unsuitable for wearable application (Fig 1a). By formulating new carbon paste, we are able to improve the washability of printed carbon electrode significantly (Fig 1b). In addition, successful transfer of the printed electrode to apparel was performed with ECG signal acquisition demonstrated,suggesting the high potential for this low cost mass production electrode manufacturing process.
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 A.A. Chlaihawi, B.B. Narakathu, S. Emamian, B.J. Bazuin, M.Z. Atashbar, Sensing and Bio-Sensing Research. 20, 9 (2018).
Dr Tey Ju Nie obtained her bachelor and Doctorate degree from School of Materials Science & Engineering, Nanyang Technological University. She has been with Singapore Institute of Manufacturing Technology from 2009 till now. Her research interest is on carbon mananomaterials development, characterization and device fabrication. Her current research focus is on carbon electrode for energy and wearable application..
The Singapore Institute of Manufacturing Technology (SIMTech) develops high value manufacturing technology and human capital to enhance the competitiveness of Singapore’s manufacturing industry. It is a research institute of the Agency for Science, Technology and Research (A*STAR).