Title: Soft electronic strain sensor with chipless wireless readout : toward real-time monitoring of bladder volume
Authors : Stauffer, Flurin
Zhang, Qiang
Tybrandt, Klas
Llerena Zambrano, Byron
Hengsteler, Julian
Stoll, André
Trüeb, Camill
Hagander, Michael
Sujata, Jean-Marc
Hoffmann, Felix
Schuurmans Stekhoven, Joy
Quack, Josefine
Zilly, Hannes
Goedejohann, Johannes
Schneider, Marc P.
Kessler, Thomas M.
Taylor, William R.
Küng, Roland
Vörös, János
Published in : Advanced Materials Technologies
Volume(Issue) : 2018
Issue : 1800031
Pages : 1
Pages to: 7
Issue Date: May-2018
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Passive sensor; Chipless sensor; Strain sensor; Wireless; Reader; RFID
Subject (DDC) : 004: Computer science
610: Medicine and health
Abstract: 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 Young's 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.
Departement: School of Engineering
Organisational Unit: Institute for Signal Processing and Wireless Communications (ISC)
Publication type: Article in scientific Journal
DOI : 10.1002/admt.201800031
ISSN: 2365-709X
URI: https://digitalcollection.zhaw.ch/handle/11475/6069
Appears in Collections:Publikationen School of Engineering

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