Photoluminescent Au-Ge composite nanodots formation on SiO 2 surface by ion induced dewetting
| Autor: | Avanendra Singh, D.P. Datta, Vantari Siva, D. Kanjilal, Pratap K. Sahoo |
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| Rok vydání: | 2017 |
| Předmět: |
Nuclear and High Energy Physics
Photoluminescence Nanostructure Materials science Ion track Bilayer Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Chemical engineering Nanodot Irradiation Dewetting 0210 nano-technology Instrumentation |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 407:141-144 |
| ISSN: | 0168-583X |
| DOI: | 10.1016/j.nimb.2017.06.008 |
| Popis: | Medium energy ion irradiation on a bilayer of Au and Ge on SiO2 is observed to result in gradual morphological evolution from an interconnected network to a nanodot array on the insulator surface. Structural and compositional analyses reveal composite nature of the nanodots, comprising of both Au and Ge. The growing nanostructures are found to be photoluminescent at room temperature where the emission intensity and wavelengths vary with morphology. The growth of such nanostructures can be understood in terms of dewetting of the metal layer under ion irradiation due to ion-induced melting along the ion tracks. The visible PL emission is found to be related with evolution of the Au-Ge nanodots. The study indicates a route towards single step synthesis of metal-semiconductor nanodots on insulator surface. |
| Databáze: | OpenAIRE |
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