Self-assembled Au and Pt nanoparticles in Poly(methyl methacrylate)
| Autor: | Mauro Sergio Dorsa Cattani, Ian G. Brown, Maria Cecília Barbosa da Silveira Salvadori, Fernanda de Sá Teixeira |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Histology
Materials science Nanoparticle Nanotechnology macromolecular substances 02 engineering and technology Platinum nanoparticles 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Electron affinity Methyl methacrylate Instrumentation Nanocomposite technology industry and agriculture 030206 dentistry Surface-enhanced Raman spectroscopy 021001 nanoscience & nanotechnology Poly(methyl methacrylate) Medical Laboratory Technology Ion implantation chemistry visual_art visual_art.visual_art_medium Anatomy 0210 nano-technology RESINAS ACRÍLICAS |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1097-0029 |
| Popis: | 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 e of the implantation-modified PMMA were obtained using a new and simple approach. |
| Databáze: | OpenAIRE |
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