Syntheses of gold and silver dichroic nanoparticles; Looking at the Lycurgus cup colors
| Autor: | Floris Dekker, Aldrik H. Velders, Lars Kool, Anton Bunschoten, Vittorio Saggiomo |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
05 social sciences 050301 education Nanoparticle Nanotechnology 02 engineering and technology silver nanoparticle Dichroism 021001 nanoscience & nanotechnology Dichroic glass Silver nanoparticle Education Chemistry (miscellaneous) demonstration dichroism 0210 nano-technology 0503 education BioNanoTechnology gold nanoparticle VLAG |
| Zdroj: | Chemistry Teacher International 3 (2021) 1 Chemistry Teacher International, 3(1) |
| ISSN: | 2569-3263 |
| Popis: | Metallic nanoparticles are small particles, with dimensions of less than 100 nm, which have unique characteristics. For example, the color of a nanoparticle solution is given by the surface plasmon resonance, in contrast to only absorbance of a molecule. Metallic nanoparticles have been used in the antiquity for the production of colored glass. Many of the medieval cathedral red windows are in fact, stained with gold nanoparticles. However, presenting just a red solution to a class and explaining that the solution contains gold nanoparticles can be disappointing as the red color can be obtained in many different ways without the need of nanoparticles. Something peculiar, like dichroism, can, on the other hand, shine the interest of an observer to the “nano-world”. Dichroic nanoparticles show different colors when illuminated from the front (scattering) or from the back (transmission). This effect is unique for nanoparticles and nanostructures in general and can generate the “WOW” effect in class or during public demonstrations. In this article we present a simple synthesis of dichroic silver and gold nanoparticles. Solutions of such nanoparticles are a stunning visual media for demonstrations, outreach and engaging audience in the “nano”world. |
| Databáze: | OpenAIRE |
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