氧化锌纳米结构的合成与同步辐射光致发光：纳米线、纳米针、纳米花和管状晶须

Synthesis and synchrotron light-induced luminescence of ZnO nanostructures: nanowires, nanoneedles, nanoflowers, and tubular whiskers.

作者信息

Sun X H, Lam S, Sham T K, Heigl F, Jürgensen A, Wong N B

机构信息

Department of Chemistry, University of Western Ontario, London, Canada N6A 5B7.

出版信息

J Phys Chem B. 2005 Mar 3;109(8):3120-5. doi: 10.1021/jp044926v.

DOI:10.1021/jp044926v

PMID:16851331

Abstract

ZnO nanostructures, including single-crystal nanowires, nanoneedles, nanoflowers, and tubular whiskers, have been fabricated at a modestly low temperature of 550 degrees C via the oxidation of metallic Zn powder without a metal catalyst. Specific ZnO nanostructures can be obtained at a specific temperature zone in the furnace depending on the temperature and the pressure of oxygen. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and X-ray diffraction (XRD) studies show that ZnO nanostructures thus prepared are single crystals with a wurtzite structure. X-ray excited optical luminescence (XEOL) from the ZnO nanostructures show noticeable morphology-dependent luminescence. Specifically, ZnO nanowires of around 15 nm in diameter emit the strongest green light. The morphology of these nanostructures, their XEOL, and the implication of the results will be discussed.

摘要

氧化锌纳米结构，包括单晶纳米线、纳米针、纳米花和管状晶须，已通过在550摄氏度的适度低温下氧化金属锌粉而在无金属催化剂的情况下制备而成。根据炉内的温度和氧气压力，可在特定温度区域获得特定的氧化锌纳米结构。扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HRTEM）和X射线衍射（XRD）研究表明，如此制备的氧化锌纳米结构是具有纤锌矿结构的单晶。来自氧化锌纳米结构的X射线激发光致发光（XEOL）显示出明显的形态依赖性发光。具体而言，直径约15纳米的氧化锌纳米线发出最强的绿光。将讨论这些纳米结构的形态、它们的XEOL以及结果的含义。