Zhuang Zhongbin, Peng Qing, Liu Junfeng, Wang Xun, Li Yadong
Department of Chemistry, Tsinghua University, Beijing, 100084, Peoples Republic of China.
Inorg Chem. 2007 Jun 25;46(13):5179-87. doi: 10.1021/ic061999f. Epub 2007 May 27.
Indium hydroxides, oxyhydroxides, and oxides are important n-type semiconductors and have wide applications in material fields. In this Article, a series of In(OH)(3) and InOOH nanocrystals with different structures and morphologies, such as nanocubes, nanorods, multipods, and nanoparticles, have been synthesized selectively through a liquid-phase reaction, by adjusting the alkalinity and polarity of the solvent. It is found that InOOH multipods are in the orthorhombic phase and their arms grow along nonequivalent faces. Cubic and hexagonal In(2)O(3) can be obtained from In(OH)(3) and InOOH, respectively, while size and morphology can be maintained to a certain extent. Gas sensors were fabricated by using In(2)O(3), and a device based on the multipods shows the best responses to ethanol vapor. XRD, TEM, HRTEM, SEM, and SAED have been used to characterize these nanocrystals. This work provides a preliminary investigation into the structural-based gas-sensing properties of these nanocrystals.
氢氧化铟、羟基氧化物和氧化物是重要的n型半导体，在材料领域有广泛应用。在本文中，通过液相反应，通过调节溶剂的碱度和极性，选择性地合成了一系列具有不同结构和形貌的In(OH)(3)和InOOH纳米晶体，如纳米立方体、纳米棒、多足体和纳米颗粒。发现InOOH多足体为正交晶相，其臂沿不等价面生长。立方相和六方相的In2O3可分别由In(OH)(3)和InOOH得到，同时尺寸和形貌可在一定程度上保持。利用In2O3制备了气体传感器，基于多足体的器件对乙醇蒸汽表现出最佳响应。采用XRD、TEM、HRTEM、SEM和SAED对这些纳米晶体进行了表征。这项工作对这些纳米晶体基于结构的气敏性能进行了初步研究。
