Microstructure and plasmonic behavior of self-assembled silver nanoparticles and nanorings
Autor: | Mihail M. Sigalas, Spyridon Grammatikopoulos, A. G. Chronis, Constantin Politis, D. M. Maratos, A. Stamatelatos, S. P. Lysandrou, Panagiotis Poulopoulos, V. Karoutsos, D. Trachylis |
---|---|
Rok vydání: | 2019 |
Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) business.industry General Physics and Astronomy Nanoparticle 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Silver nanoparticle Condensed Matter::Materials Science 0103 physical sciences Optoelectronics 0210 nano-technology business Plasmon Nanoring Visible spectrum Localized surface plasmon |
Zdroj: | Journal of Applied Physics. 125:023106 |
ISSN: | 1089-7550 0021-8979 |
Popis: | Self-assembled nanoparticles were formed after annealing ultrathin Ag films, which were grown on glass and quartz by direct current magnetron sputtering, in a furnace in air at 420 °C, 500 °C, or 600 °C. Intense localized surface plasmon resonances were observed for these samples in the entire range of visible light spectrum depending on the annealing time and nanoparticle size. Prolonged annealing resulted in the formation of nanorings and the change of the position and shape of resonances. The nanoring formation is attributed to partial evaporation of silver due to trapping of electromagnetic field by the larger nanoparticles despite the relatively low annealing temperature. Finally, in order to gain a further physical insight, the experimental results are compared with respect to rigorous theoretical calculations. |
Databáze: | OpenAIRE |
Externí odkaz: |