Nano-assembling and optical properties of sub-100 nm raspberry-like nanoparticles
| Autor: | Dominique Vouagner, Matteo Martini, Hélène Gehan, Anne-Marie Jurdyc, Mohamed Remram, Mahmoud Ould Metidji, Chouaib Daoudi |
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| Přispěvatelé: | Université Mentouri Constantine [Algérie] (UMC), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
[PHYS]Physics [physics]
Materials science Dispersity Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Electronic Optical and Magnetic Materials [SPI]Engineering Sciences [physics] Dynamic light scattering Chemical engineering Colloidal gold Absorption band Nano Photocatalysis [CHIM]Chemical Sciences 0210 nano-technology Instrumentation Plasmon |
| Zdroj: | European Physical Journal: Applied Physics European Physical Journal: Applied Physics, EDP Sciences, 2018, 82 (2), pp.20401. ⟨10.1051/epjap/2018180065⟩ |
| ISSN: | 1286-0042 1286-0050 |
| DOI: | 10.1051/epjap/2018180065⟩ |
| Popis: | International audience; The optical properties of sub-100 nm raspberry-like nano-systems composed of highly monodisperse silica particles and large gold nanoparticles (GNPs) is studied experimentally. The nanoparticles (NPs) were prepared by a self-assembly method, and the pH of each solution was determined by measuring the ζ-potential to ensure the stability of the nano-systems. Dynamic light scattering measurements show a narrow size distribution of NPs, and fairly dispersed particles in solution. The obtained nanoraspberries was also studied by transmission electron microscopy, which shows that the GNPs closely packed on the surface of silica particles. This effect induced a broadening and a shift of the absorption band to higher wavelengths, with an increase in GNPs density. It was also observed that the reduced size of silica particles resulted in a shortening of the inter-particles distance, which has favoured the generation of many hot spots in the gaps between GNPs. The tenability of obtained plasmon bands may have benefits in SERS probe, photocatalysis and fluorescence-based bioimaging. |
| Databáze: | OpenAIRE |
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