Abstract
Electrically conducting nanocomposite has numerous application potential in flexible MEMS and wearable electronics. Polydimethylsiloxane (PDMS) has been identified as an attractive candidate for the fabrication of Bio-MEMS devices due to several benefits such as biocompatibility, good optical properties, easy and low-cost fabrication using soft-lithography, etc. Until now, the synthesis of electrically conducting nanocomposite is proposed only by mechanical stimulation of electrically conducting nano materials such as carbon nanotubes, gold or silver nanoparticles in polymer matrix. In this work, an electrically conducting PDMS nanocomposite is synthesized using a novel combined process of in situ reduction by curing agent of PDMS from aqueous gold chloride solution, and mechanical stimulation of multi-wall carbon nanotubes and silver nanoparticles. The optical, electrical and thermal properties of the PDMS- nanocomposite are characterized. Further, the nanocomposite is micro patterned to fabricate heating elements and electrical signal routing lines in flexible PDMS sheets. The resistivity of the nanocomposite is measured as 3.5 × 10−3 Ω.m, which is much lower than the previously reported value of 1 Ω.m.
Published Version
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