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Design and Development of Micro-Power Generating Device for Biomedical Applications of Lab-on-a-Disc

Joseph K 1 , Ibrahim F 1 , Cho J 2 , Thio TH 3 , Al-Faqheri W 1 , Madou M 4

Affiliations 

  • 1 Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; Centre for Innovations in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
  • 2 Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; Centre for Innovations in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; Department of Biomedical Engineering, Inje University, Gimhae, South Korea
  • 3 Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; Centre for Innovations in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; Faculty of Science, Technology, Engineering and Mathematics, INTI International University, Persiaran Perdana BBN, Putra Nilai, Nilai, Negeri Sembilan, Malaysia
  • 4 Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia; Department of Biomedical Engineering, University of California Irvine, Irvine, California, United States of America; Department of Mechanical and Aerospace Engineering, University of California Irvine, Irvine, California, United States of America
PLoS One, 2015;10(9):e0136519.
PMID: 26422249 DOI: 10.1371/journal.pone.0136519

Abstract

The development of micro-power generators for centrifugal microfluidic discs enhances the platform as a green point-of-care diagnostic system and eliminates the need for attaching external peripherals to the disc. In this work, we present micro-power generators that harvest energy from the disc's rotational movement to power biomedical applications on the disc. To implement these ideas, we developed two types of micro-power generators using piezoelectric films and an electromagnetic induction system. The piezoelectric-based generator takes advantage of the film's vibration during the disc's rotational motion, whereas the electromagnetic induction-based generator operates on the principle of current generation in stacks of coil exposed to varying magnetic flux. We have successfully demonstrated that at the spinning speed of 800 revolutions per minute (RPM) the piezoelectric film-based generator is able to produce up to 24 microwatts using 6 sets of films and the magnetic induction-based generator is capable of producing up to 125 milliwatts using 6 stacks of coil. As a proof of concept, a custom made localized heating system was constructed to test the capability of the magnetic induction-based generator. The heating system was able to achieve a temperature of 58.62 °C at 2200 RPM. This development of lab-on-a-disc micro power generators preserves the portability standards and enhances the future biomedical applications of centrifugal microfluidic platforms.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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