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To high-performance detection of ultra-low concentration explosive vapor, we develop resonant microcantilever sensors by using a nano sensing material of functionalized GO/Au-NPs (gold-nanoparticles in situ grown on graphene-oxide sheet). To achieve specific-modification for fine selectivity and enlarge graphene surface-area for fast capturing the gas-molecules, surface-modified graphene-oxide sheets...
With oleyamine as solvent and reduce agent, Au nanoparticles (AuNPs) are in situ grown on graphene oxide (GO) sheets. Thereafter, porous-layered stack of AuNPs-rGO nanosheets is formed by a gas-phase chemical-reduction step. After the AuNPs modified with 11-mercaptoundecanoic acid (11-MUA) to graft — COOH sensing groups to amine, the functionalized AuNPs-rGO porous-stacked nanosheets are loaded onto...
A resonant micro-cantilever chemical sensor with integrated piezoresistive self-sensing function is presented. On the micro-cantilever surface, multi-wall carbon nanotubes (CNTs) are immobilized and modified with specific sensing groups. Owing to the high specific-surface-area of MWCNTs and high-effective sensitive groups, the sensor has been used to detect sub-ppb trace-level trinitrotoluene (TNT)...
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