Top-down approach for the preparation of Au/ZnO nanostructures by glancing-angle ion irradiation: Morphological, structural and optical studies

IF 3.3 3区物理与天体物理 Q2 OPTICS Journal of Luminescence Pub Date : 2024-11-04 DOI:10.1016/j.jlumin.2024.120974

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Abstract

We report the 100 keV glancing-angle Xe⁺ ions irradiation based top down approach for the preparation of ZnO and Au/ZnO hybrid nanostructures and its morphological, structural and optical properties. FESEM micrographs reveal Xe⁺ ion irradiation favours the nucleation and formation of highly aligned, dense nanostrips like structures. Crystalline structure of ZnO, Xe⁺ ions irradiated ZnO and Au/ZnO hybrid nanostructures were analysed by grazing incident X-ray diffraction and Raman scattering measurements. The elemental compositions and thickness of the grown nanostructures were estimated using Rutherford backscattering spectrometry analysis. The influence of Xe⁺ ion irradiation on the photoluminescence (PL) behaviour of ZnO and Au/ZnO hybrid nanostructures were studied in detail using temperature dependent PL measurements in the range of 80–298 K. Strong PL emission associated with free excitons (FX) and its longitudinal optical phonon replicas observed in ion irradiated Au/ZnO hybrid nanostructures clearly reveal the strong coupling of the localized surface plasmons in the Au nanoparticles to the FX in ZnO. Our experimental results reveal ion beam irradiation is one of the effective approaches to tailor the optical properties of ZnO and Au/ZnO hybrid nanostructures.

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通过闪烁角离子辐照自上而下制备金/氧化锌纳米结构的方法：形态、结构和光学研究

我们报告了基于 100 keV 闪烁角 Xe+ 离子辐照的自顶向下方法制备氧化锌和金/氧化锌杂化纳米结构及其形态、结构和光学特性。FESEM 显微照片显示，Xe+ 离子辐照有利于成核和形成高度排列整齐、致密的纳米条状结构。通过掠入射 X 射线衍射和拉曼散射测量分析了氧化锌、Xe+ 离子辐照氧化锌和金/氧化锌杂化纳米结构的晶体结构。利用卢瑟福反向散射光谱分析估算了生长的纳米结构的元素组成和厚度。在离子照射的 Au/ZnO 混合纳米结构中观察到的与自由激子 (FX) 相关的强 PL 发射及其纵向光学声子复制品清楚地揭示了 Au 纳米粒子中的局部表面质子与 ZnO 中的 FX 的强耦合。我们的实验结果表明，离子束辐照是定制氧化锌和金/氧化锌杂化纳米结构光学特性的有效方法之一。

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.