Palladium Nanoribbon Array for Fast Hydrogen Gas Sensing with Ultrahigh Sensitivity.

Pak, Yusin; Lim, Namsoo; Kumaresan, Yogeenth; Lee, Ryeri; Kim, Kihyeun; Kim, Tae Heon; Kim, Sang-Mook; Kim, Jin Tae et al. · Adv Mater · 2015

basic_science · Level V

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Abstract

A lithographically aligned palladium nano-ribbon (Pd-NRB) array with gaps of less than 40 nm is fabricated on a poly(ethylene terephthalate) substrate using the direct metal transfer method. The 200 μm Pd-NRB hydrogen gas sensor exhibits an unprecedented sensitivity of 10(9) % after bending treatment, along with fast sensing behavior (80% response time of 3.6 s and 80% recovery time of 8.7 s) at room temperature.