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Soft Electronic Strain Sensor with Chipless Wireless Readout: Toward Real-Time Monitoring of Bladder Volume
Swiss Fed Inst Technol, Switzerland.
Swiss Fed Inst Technol, Switzerland.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering. Swiss Fed Inst Technol, Switzerland.ORCID iD: 0000-0002-9845-446X
Swiss Fed Inst Technol, Switzerland.
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2018 (English)In: ADVANCED MATERIALS TECHNOLOGIES, ISSN 2365-709X, Vol. 3, no 6, article id 1800031Article in journal (Refereed) Published
Abstract [en]

Sensing mechanical tissue deformation in vivo can provide detailed information on organ functionality and tissue states. To bridge the huge mechanical mismatch between conventional electronics and biological tissues, stretchable electronic systems have recently been developed for interfacing tissues in healthcare applications. A major challenge for wireless electronic implants is that they typically require microchips, which adds complexity and may compromise long-term stability. Here, a chipless wireless strain sensor technology based on a novel soft conductor with high cyclic stability is reported. The composite material consists of gold-coated titanium dioxide nanowires embedded in a soft silicone elastomer. The implantable strain sensor is based on an resonant circuit which consists of a stretchable plate capacitor and a coil for inductive readout of its resonance frequency. Successful continuous wireless readout during 50% strain cycles is demonstrated. The sensor element has a Youngs modulus of 260 kPa, similar to that of the bladder in order to not impair physiological bladder expansion. A proof-of-principle measurement on an ex vivo porcine bladder is presented, which shows the feasibility of the presented materials and devices for continuous, wireless strain monitoring of various tissues and organs in vivo.

Place, publisher, year, edition, pages
WILEY , 2018. Vol. 3, no 6, article id 1800031
Keywords [en]
chipless; soft conductors; strain sensors; stretchable electronics; wireless sensors
National Category
Textile, Rubber and Polymeric Materials
Identifiers
URN: urn:nbn:se:liu:diva-149356DOI: 10.1002/admt.201800031ISI: 000434947600012OAI: oai:DiVA.org:liu-149356DiVA, id: diva2:1229804
Note

Funding Agencies|Swedish Research Council [637-2013-7301]; Swiss Nanotera SpineRepair project, ETH Zurich, SENESCYT; Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linkoping University [2009 00971]; Swedish Foundation for Strategic Research

Available from: 2018-07-02 Created: 2018-07-02 Last updated: 2018-07-02

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CiteExportLink to record
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Citation style
  • apa
  • harvard1
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  • de-DE
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Output format
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