Paper-supported WS2 strain gauges

• Direct abrasion provides a cost effective way to deposit tungsten disulphide (WS2) on paper substrates. The deposited film electrical resistance strongly depends the applied mechanical strain. gauge factor can reach values up ~70, one order of magnitude larger than similar devices with graphite sensing layer. Paper-supported strain gauges be used monitor deformations in resonators and measure forces masses. These interesting disposable electronic applications. Environmentally friendly low-cost sensors are needed for next generation electronics Given its low-cost, availability biodegradability, paper-based very promising. Here we demonstrate fabrication (WS 2 ) sensor standard copy paper. WS is through direct powder against surface making device low-tech effective. fabricated present factors ~70 strains the±0.5% range. ~ 9 times that obtained same geometry but using instead as sensitive material. We potential these -on-paper by integrating them directly cantilever sense mass forces. show how this simple detect sub-milligram Moreover, also capability transducing motion gluing their surface.