Please use this identifier to cite or link to this item: https://doi.org/10.1038/srep24946
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dc.titleMEMS Based Broadband Piezoelectric Ultrasonic Energy Harvester (PUEH) for Enabling Self-Powered Implantable Biomedical Devices
dc.contributor.authorShi Q.
dc.contributor.authorWang T.
dc.contributor.authorLee C.
dc.date.accessioned2020-09-09T01:37:25Z
dc.date.available2020-09-09T01:37:25Z
dc.date.issued2016
dc.identifier.citationShi Q., Wang T., Lee C. (2016). MEMS Based Broadband Piezoelectric Ultrasonic Energy Harvester (PUEH) for Enabling Self-Powered Implantable Biomedical Devices. Scientific Reports 6 : 24946. ScholarBank@NUS Repository. https://doi.org/10.1038/srep24946
dc.identifier.issn20452322
dc.identifier.urihttps://scholarbank.nus.edu.sg/handle/10635/174974
dc.description.abstractAcoustic energy transfer is a promising energy harvesting technology candidate for implantable biomedical devices. However, it does not show competitive strength for enabling self-powered implantable biomedical devices due to two issues - large size of bulk piezoelectric ultrasound transducers and output power fluctuation with transferred distance due to standing wave. Here we report a microelectromechanical systems (MEMS) based broadband piezoelectric ultrasonic energy harvester (PUEH) to enable self-powered implantable biomedical devices. The PUEH is a microfabricated lead zirconate titanate (PZT) diaphragm array and has wide operation bandwidth. By adjusting frequency of the input ultrasound wave within the operation bandwidth, standing wave effect can be minimized for any given distances. For example, at 1 cm distance, power density can be increased from 0.59 ?W/cm2 to 3.75 ?W/cm2 at input ultrasound intensity of 1 mW/cm2 when frequency changes from 250 to 240 kHz. Due to the difference of human body and manual surgical process, distance fluctuation for implantable biomedical devices is unavoidable and it strongly affects the coupling efficiency. This issue can be overcome by performing frequency adjustment of the PUEH. The proposed PUEH shows great potential to be integrated on an implanted biomedical device chip as power source for various applications.
dc.publisherNature Publishing Group
dc.sourceUnpaywall 20200831
dc.subjectdevices
dc.subjectenergy transfer
dc.subjectequipment design
dc.subjectmicroelectromechanical system
dc.subjectpower supply
dc.subjectprostheses and orthoses
dc.subjectultrasound
dc.subjectElectric Power Supplies
dc.subjectEnergy Transfer
dc.subjectEquipment Design
dc.subjectMicro-Electrical-Mechanical Systems
dc.subjectProstheses and Implants
dc.subjectUltrasonics
dc.typeArticle
dc.contributor.departmentELECTRICAL AND COMPUTER ENGINEERING
dc.description.doi10.1038/srep24946
dc.description.sourcetitleScientific Reports
dc.description.volume6
dc.description.page24946
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