纳米棒
锌
材料科学
化学工程
热液循环
成核
氯化物
硝酸锌
表面张力
基质(水族馆)
图层(电子)
纳米技术
化学
冶金
有机化学
物理
海洋学
量子力学
地质学
工程类
作者
Asmaa Al‐Rasheedi,Merouane Khammar,A. M. Abdel‐Daiem,M.S. Aida,M. Sh. Abdel-wahab
出处
期刊:Physica Scripta
[IOP Publishing]
日期:2023-11-17
卷期号:98 (12): 125947-125947
标识
DOI:10.1088/1402-4896/ad0ae8
摘要
Abstract The present paper discuss the growth mechanisms of ZnO nanorods thin-films using the hydrothermal process. This was achieved on a ZnO seed layer prepared by sputtering and spray pyrolysis. ZnO nanorods were prepared using various precursors, including zinc nitrate [Zn(NO 3 ) 2 .6H2O], zinc chloride [ZnCl 2 ], and zinc acetate [Zn(CH 3 COO) 2 .2H 2 O, to investigate the effect of salt source. The morphological and structural properties of ZnO NRs were investigated using x-ray diffraction (XRD) and a scanning electron microscopy (SEM). The deposited film consist of highly oriented crystalline ZnO NRs along the [002] axis. We found that the seed layer preparation method alters the nanorods alignment. SEM observation revealed that, regardless of the seed layer preparation method, the nature of salt source play a key role in the nanorods size. We concluded that the ZnO nanorods diameter increases in the following order with respect to zinc salt source: Zn Ac <zinc nitride <zinc chloride. The mechanism of of ZnO nanorods formation is correlated with bath solution viscosity and surface tension properties. We emphasized that, in a solution with a larger viscosity and surface tension, such as zinc chloride, the motion and transfer towards the substrate, of species participating in ZnO formation, is hindered by the friction force due to the viscosity. When using a solution with lower viscosity and surface tension, such as zinc acetate, the species forming the ZnO nanorods can easily reach the substrate, which leads to a larger nucleation center, yielding low-diameter ZnO nanorods.
科研通智能强力驱动
Strongly Powered by AbleSci AI