Transient piezoresistive pressure sensors with long-term stability
발표자
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초록
내용
Transient electronics have been an emerging field of biomedical devices because of their unique property that they dissolve in a certain period of time. Recent studies on the transient electronics have been focused on extending the lifespan of devices. To achieve long lifetime of bioresorbable devices, a silicon nanomembrane is introduced to the bioresorbable pressure sensor as an encapsulating layer. For the side protection from the water penetration, the wax-based materials are used as a side encapsulation layer. Secondly, water-soluble conductive inks are developed and printed to form a piezoresistive pressure sensor. The conductive inks are prepared through in situ polymerization of polyanhydride and composited with bioresorbable metal microparticles. The pressure sensors show stable operation over an extended period of time in aqueous environments. Furthermore, animal tests verify the long-term stability of the devices under in vivo conditions as well as their biocompatibility.