An in vitro demonstration of a passive, acoustic metamaterial as a temperature sensor with mK resolution for implantable applications.

ABSTRACT: Wireless medical sensors typically utilize electromagnetic coupling or ultrasound for energy transfer and sensor interrogation. Energy transfer and management is a complex aspect that often limits the applicability of implantable sensor systems. In this work, we report a new passive temperature sensing scheme based on an acoustic metamaterial made of silicon embedded in a polydimethylsiloxane matrix. Compared to other approaches, this concept is implemented without additional electrical components in situ or the need for a customized receiving unit. A standard ultrasonic transducer is used for this demonstration to directly excite and collect the reflected signal. The metamaterial resonates at a frequency close to a typical medical value (5 MHz) and exhibits a high-quality factor. Combinin

SUBMITTER: Maini L 

PROVIDER: S-EPMC10794229 | biostudies-literature | 2024

REPOSITORIES: biostudies-literature