Phan The-Long, Cuong Le Viet, Lam Vu Dinh, Dang Ngoc Toan
Faculty of Engineering Physics and Nanotechnology, VNU University of Engineering and Technology, 144 Xuan Thuy, Cau Giay, Hanoi, Vietnam.
Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.
Beilstein J Nanotechnol. 2024 Nov 11;15:1390-1399. doi: 10.3762/bjnano.15.112. eCollection 2024.
This work presents a simple chemical vapour deposition (CVD) method to grow ZnO nanostructures. By annealing Zn powder under atmospheric pressure conditions, we collected nanocrystals with various morphologies, including rods, pencils, sheets, combs, tetrapods, and multilegs. Raman scattering study reveals that the samples are monophasic with a hexagonal structure, and fall into the 6 space group. Depending on the morphology and crystal quality, their photoluminescence spectra have only a strong UV emission associated with the exciton radiative recombination, or both UV and defect-related visible emissions with their relative intensity ratio varying with the excitation power density. The obtained results prove that ZnO exhibits many novel nanostructures that can foster the development of next-generation optoelectronic nanodevices and new applications in biological and biomedical fields.
这项工作提出了一种简单的化学气相沉积（CVD）方法来生长ZnO纳米结构。通过在大气压条件下对锌粉进行退火，我们收集到了具有各种形态的纳米晶体，包括棒状、铅笔状、片状、梳状、四足状和多腿状。拉曼散射研究表明，样品为具有六方结构的单相，属于6 空间群。根据形态和晶体质量，它们的光致发光光谱要么只有与激子辐射复合相关的强紫外发射，要么同时有紫外和与缺陷相关的可见发射，且它们的相对强度比随激发功率密度而变化。所获得的结果证明，ZnO展现出许多新型纳米结构，这些结构能够促进下一代光电子纳米器件的发展以及在生物和生物医学领域的新应用。
