Formation of partially embedded Au nanostructures: Ion beam irradiation on thin film

IF 2 3区工程技术 Q2 ANATOMY & MORPHOLOGY

Microscopy Research and Technique Pub Date : 2024-05-15 DOI:10.1002/jemt.24598

Shivani Chaudhary, Vinay K. Srivastava, Mukesh Kumar, G. B. V. S. Lakshmi, D. C. Agarwal, Sunil Ojha, Manish Kumar, Tanuj Kumar, Ratnesh K. Pandey, Santanu Ghosh, D. K. Avasthi, R. P. Yadav, Ravi S. Singh, Udai B. Singh

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Abstract

The Au partially embedded nanostructure (PEN) is synthesized by ion irradiation on an Au thin film deposited on a glass substrate using a 50 keV Ar ion. Scanning electron microscopy results show ion beam-induced restructuring from irregularly shaped nanostructures (NSs) to spherical Au NSs, and further ion irradiation leads to the formation of well-separated spherical nanoparticles. Higuchi's algorithm of surface analysis is utilized to find the evolution of surface morphology with ion irradiation in terms of the Hurst exponent and fractal dimension. The Au PEN is evidenced by Rutherford backscattering spectrometry and optical studies. Also, the depth of the mechanism behind synthesized PEN is explained on the basis of theoretical simulations, namely, a unified thermal spike and a Monte Carlo simulation consisting of dynamic compositional changes (TRIDYN). Another set of plasmonic NSs was formed on the surface by thermal annealing of the Au film on the substrate. Glucose sensing has been studied on the two types of plasmonic layers: nanoparticles on the surface and PEN. The results reveal the sensing responses of both types of plasmonic layers. However, PEN retains its plasmonic behavior as the NSs are still present after washing with water, which demonstrates the potential for reusability.

Research Highlights

Synthesis of PENs by ion irradiation
Utilization of Higuchi's algorithm to explore the surface morphology.
Unified thermal spike and TRIDYN simulations being used to explain the results.
Glucose is only used as a test case for reusability of substrate.

Abstract Image

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部分嵌入金纳米结构的形成：离子束辐照薄膜。

通过使用 50 keV Ar 离子对沉积在玻璃基底上的金薄膜进行离子照射，合成了金部分嵌入纳米结构（PEN）。扫描电子显微镜结果表明，离子束诱导了从不规则形状的纳米结构（NSs）到球形金纳米结构（NSs）的重组，进一步的离子辐照导致了分离良好的球形纳米颗粒的形成。利用樋口表面分析算法从赫斯特指数和分形维度的角度发现了表面形态随离子辐照的演变。卢瑟福反向散射光谱和光学研究证明了 Au PEN 的存在。此外，还在理论模拟（即统一热尖峰模拟和由动态成分变化组成的蒙特卡罗模拟（TRIDYN））的基础上解释了合成 PEN 背后的深层机理。通过对基底上的金薄膜进行热退火，在其表面形成了另一组等离子体 NS。对两种类型的质子层（表面纳米粒子和 PEN）进行了葡萄糖传感研究。结果显示了这两种类型的质子层的传感响应。然而，PEN 在用水清洗后仍能保持其等离子特性，因为 NSs 仍然存在，这证明了其可重复使用的潜力。研究亮点：通过离子辐照合成 PEN 利用樋口算法探索表面形态。使用统一的热尖峰和 TRIDYN 模拟来解释结果。葡萄糖仅用作基底可重复使用性的测试案例。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microscopy Research and Technique 医学-解剖学与形态学

CiteScore

5.30

自引率

20.00%

发文量

233

审稿时长

4.7 months

期刊介绍： Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.