Self-assembled Au and Pt nanoparticles in Poly(methyl methacrylate),Microscopy Research and Technique

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Self-assembled Au and Pt nanoparticles in Poly(methyl methacrylate)
Microscopy Research and Technique ( IF 2.0 ) Pub Date : 2021-01-14 , DOI: 10.1002/jemt.23705
Maria Cecília Salvadori ₁ , Fernanda de Sá Teixeira ₁ , Mauro Cattani ₁ , Ian G Brown ₂

Affiliation

Nanocomposites formed by metal nanoparticles self-assembled in an insulator matrix are of great technological importance. Applications include surface enhanced Raman spectroscopy based biosensors, optical devices, photovoltaic cells, and more. Self-assembling of nanocomposites using low energy ion implantation offers a fast and low cost process. We report here on our work on nanocomposites formed by very low energy ion implantation of gold and platinum nanoparticles into Poly(methyl methacrylate) (PMMA), with description of the nanoparticle evolution as a function of implantation dose. The Au-PMMA and Pt-PMMA nanocomposites were characterized by transmission electron microscopy, thus determining the nanoparticle density, their size distribution, and the distance between particles as a function of implantation dose. A comparison between Au-PMMA and Pt-PMMA reveals substantial differences in the formation processes of the nanoparticles. The results provide insight into basic nanoparticle formation processes, as well as crucial information important for design applications. In addition, the tunneling decay length ξ and the electron affinity ε of the implantation-modified PMMA were obtained using a new and simple approach.

中文翻译：

聚（甲基丙烯酸甲酯）中的自组装 Au 和 Pt 纳米粒子

由金属纳米粒子在绝缘体基质中自组装形成的纳米复合材料具有重要的技术意义。应用包括基于表面增强拉曼光谱的生物传感器、光学器件、光伏电池等。使用低能离子注入自组装纳米复合材料提供了一种快速且低成本的工艺。我们在此报告了我们在通过将金和铂纳米粒子以极低能量离子注入聚甲基丙烯酸甲酯 (PMMA) 形成的纳米复合材料方面的工作，并描述了纳米粒子演化与注入剂量的关系。Au-PMMA 和 Pt-PMMA 纳米复合材料通过透射电子显微镜进行表征，从而确定纳米颗粒密度、它们的尺寸分布和颗粒之间的距离作为注入剂量的函数。Au-PMMA 和 Pt-PMMA 之间的比较揭示了纳米颗粒形成过程的显着差异。结果提供了对基本纳米颗粒形成过程的深入了解，以及对设计应用很重要的关键信息。此外，隧穿衰减长度使用一种新的简单方法获得了注入改性 PMMA 的ξ和电子亲和力ε。

更新日期：2021-01-14

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