Data from: Degenerately Doped Metal Oxide Nanocrystals as Plasmonic and Chemoresistive Gas Sensors

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Highly doped wide band gap metal oxide nanocrystals have recently been proposed as building blocks for applications as transparent electrodes, electrochromics, plasmonics, and optoelectronics in general. Here we demonstrate the application of gallium-doped zinc oxide (GZO) nanocrystals as novel plasmonic and chemiresistive sensors for the detection of hazardous gases including hydrogen (H2) and nitrogen dioxide (NO2). GZO nanocrystals with a tunable surface plasmon resonance in the near-infrared are obtained using a colloidal heat-up synthesis. Thanks to the strong sensitivity of the plasmon resonances to chemical and electrical changes occurring at the surface of the nanocrystals, such optical features can be used to detect the presence of toxic gases. By monitoring the changes in the dopant-induced plasmon resonance in the near-infrared, we demonstrate that GZO thin films prepared depositing an assembly of highly doped GZO colloids are able to optically detect both oxidizing and reducing gases at mild (

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近年来，高掺杂宽带隙金属氧化物纳米晶体已被提议作为透明电极、电致变色器件、等离子体学器件以及通用光电子学应用的构筑单元。本研究展示了镓掺杂氧化锌（GZO）纳米晶体作为新型等离子体型和化学电阻型传感器，用于检测包括氢气（H₂）、二氧化氮（NO₂）在内的有害气体的应用。采用胶体热合成法可制备出在近红外区间具有可调谐表面等离子体共振特性的GZO纳米晶体。由于等离子体共振对纳米晶体表面发生的化学与电学变化具有极强的敏感性，这类光学特性可用于检测有毒气体的存在。通过监测掺杂诱导的近红外等离子体共振变化，本研究证实：通过沉积高掺杂GZO胶体组装体制备的GZO薄膜，能够在温和（