27 August 2014 Viral-templated nanocrystalline Pd nanowires for chemiresistive hydrogen (H2) sensors
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Abstract
A palladium (Pd) nanowire-based hydrogen (H2) sensor has been fabricated with a novel viral-templated assembly route. A filamentous M13 bacteriophage was used as the viral-template for assembly of Pd nanowires at ambient conditions. Scanning electron microscopy determined Pd nanowire distribution and morphology with the devices. The phage template concentration controlled the number of physical and electrical nanowire connections across the device. A greater phage concentration resulted in a higher connection density and thicker Pd deposition. A lower phage concentration generated devices which formed chain-like nanowires of Pd nanocrystals, whereas a higher phage concentration formed devices with a continuous mesh-like structure. The lower concentration devices showed 51-78% instantaneous response to 2000 ppm H2 and response time less than 30 s.
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Chung Hee Moon, Yiran Yan, Miluo Zhang, Nosang V. Myung, Elaine D. Haberer, "Viral-templated nanocrystalline Pd nanowires for chemiresistive hydrogen (H2) sensors", Proc. SPIE 9171, Nanobiosystems: Processing, Characterization, and Applications VII, 91710U (27 August 2014); doi: 10.1117/12.2061158; https://doi.org/10.1117/12.2061158
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