Thermochemistry of nanoparticles on a substrate: Zinc oxide on amorphous silica

Tatiana Y. Shvareva; Sergey V. Ushakov; Alexandra Navrotsky; Joseph A. Libera; Jeffrey W. Elam

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Thermochemistry of nanoparticles on a substrate: Zinc oxide on amorphous silica

机译：基材上纳米颗粒的热化学：无定形二氧化硅上的氧化锌

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Crystalline samples of zinc oxide on a mesoporous amorphous silica substrate were prepared by 5 to 15 atomic layer deposition cycles with diethyl zinc and water at 150 ℃. Samples were characterized by x-ray diffraction, thermogravimetry, and nitrogen adsorption-desorption isotherms. High-temperature oxide melt solution calorimetry and water adsorption calorimetry experiments were performed to measure surface enthalpy for crystalline ZnO particles supported on the substrate. The measured enthalpies 1.23 ± 0.35 and 2.07 ± 0.59 J/m~2 for hydrous and anhydrous surfaces, respectively, are in agreement with previously reported measurements for unsupported ZnO nanoparticles. Feasibility of thermochemical characterization of complex system of atomic layer deposition (ALD) prepared particles on a substrate was demonstrated.

机译：通过在150℃下用二乙基锌和水进行5到15个原子层沉积循环，制备了介孔无定形二氧化硅基质上的氧化锌晶体样品。通过X射线衍射，热重分析和氮吸附-解吸等温线对样品进行表征。进行了高温氧化物熔体溶液量热法和水吸附量热法实验，以测量支撑在基板上的结晶ZnO颗粒的表面焓。含水和无水表面的焓分别为1.23±0.35和2.07±0.59 J / m〜2，与先前报道的无载体ZnO纳米颗粒的测量值一致。证明了在基材上进行原子层沉积（ALD）制备的复合体系的热化学表征的可行性。

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《Journal of Materials Research》 |2008年第7期|1907-1915|共9页
作者
Tatiana Y. Shvareva; Sergey V. Ushakov; Alexandra Navrotsky; Joseph A. Libera; Jeffrey W. Elam;
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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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Thermochemistry of nanoparticles on a substrate: Zinc oxide on amorphous silica

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