大面积可控合成氧化锌纳米棒和棱柱状阵列。

Controllable synthesis of ZnO nanorod and prism arrays in a large area.

作者信息

Wang Debao, Song Caixia

机构信息

College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China.

出版信息

J Phys Chem B. 2005 Jul 7;109(26):12697-700. doi: 10.1021/jp0506134.

DOI:10.1021/jp0506134

PMID:16852572

Abstract

ZnO nanorod and nanoprism arrays have been directly synthesized on a large-area zinc substrate via a convenient solution method. The products were characterized with XRD, SEM, HRTEM, and photoluminescence (PL) spectroscopy. The influence of the solvent and the concentration of NaOH on the size and shapes of the as-prepared ZnO samples have been studied. It was found that ZnO nanorod or nanowire arrays were fabricated in alcohol, whereas ZnO nanoprisms with pyramid tips were produced in an alcohol-water mixture. The diameters of the nanorods or nanoprisms became thicker when a higher concentration of NaOH was used. Room-temperature PL spectra of the ZnO products showed a UV emission and a broad green band. The mechanism of the nanorods and nanoprisms in two systems is briefly discussed.

摘要

通过一种简便的溶液法在大面积锌衬底上直接合成了氧化锌纳米棒和纳米棱柱阵列。采用X射线衍射（XRD）、扫描电子显微镜（SEM）、高分辨透射电子显微镜（HRTEM）和光致发光（PL）光谱对产物进行了表征。研究了溶剂和氢氧化钠浓度对所制备氧化锌样品尺寸和形状的影响。结果发现，在乙醇中制备出了氧化锌纳米棒或纳米线阵列，而在乙醇 - 水混合溶液中制备出了具有金字塔形尖端的氧化锌纳米棱柱。当使用较高浓度的氢氧化钠时，纳米棒或纳米棱柱的直径变粗。氧化锌产物的室温PL光谱显示出紫外发射和一个宽的绿色带。简要讨论了两个体系中纳米棒和纳米棱柱的形成机理。