Strain sensors on water-soluble cellulose nanofibril paper by polydimethylsiloxane (PDMS) stencil lithography. Issue 88 (8th September 2016)

• Record Type: Journal Article
• Authors: Meng, Lingju; Mahpeykar, Seyed Milad; Xiong, Qiuyang; Ahvazi, Behzad; Wang, Xihua
• Is Part Of: RSC advances. Volume 6:Issue 88(2016)
• Page Start: 85427
• Page End: 85433
• Publication Date: 2016-09-08
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c6ra10069d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : We report the patterning of metal electrodes on water-soluble nanofibril papers using PDMS stencil lithography. Strain sensors fabricated with silver nanoparticles on patterned metal electrodes show high gauge-factors of over 50 in strain testing. Abstract : Transient electronics are of great interest in medical implants and environmentally friendly devices. These electronic devices can be partially or fully dissolved in water in a controlled period of time. Herein, we show the fabrication and characterization of silver nanoparticle-based strain sensors on the water-soluble nanofibril paper, a cellulose nanocrystal (CNC) produced flexible film, by stencil lithography. This is the first demonstration of using polydimethylsiloxane (PDMS) stencils to pattern metal electrodes on water-soluble substrates. For the large London dispersion force (LDF) between the PDMS stencil and the flexible substrate, the stencil can conformably cover the substrate and prevent metal diffusion into the area under the stencil when metal electrodes are patterned on water-soluble nanofibril papers. PDMS stencil lithography avoids damage to the cellulose nanofibril paper, which conventional photolithography processes lead to, without compromising the resolution in patterning. Our strain sensors have a high sensitivity with a gauge-factor of over 50 in strain testing, which is the highest among reported strain sensors fabricated on water-soluble substrates.