Optical properties of plasmonic silver nanoparticles exposed to organic solvents
| Autor: | S. G. Przhibel'skii, Tigran A. Vartanyan, N. B. Leonov |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Scanning electron microscope Annealing (metallurgy) Physics::Optics Nanoparticle Nanotechnology 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Silver nanoparticle Electronic Optical and Magnetic Materials Atomic diffusion Condensed Matter::Materials Science Chemical engineering Liquid crystal Physical vapor deposition 0103 physical sciences Sapphire sense organs Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Optical and Quantum Electronics. 49 |
| ISSN: | 1572-817X 0306-8919 |
| DOI: | 10.1007/s11082-017-0969-8 |
| Popis: | The influence of ethanol and acetic acid on the structure and optical properties of silver granular films formed by physical vapor deposition in a high vacuum on sapphire substrates was studied via optical spectroscopy and scanning electron microscopy. It was found that irregularly shaped oblate silver grains transforms into almost spherical nanoparticles. Simultaneously, optical extinction spectra shift in the short wavelength range and become narrower. The same effect was observed when liquid crystal was poured on such film. It was noticed, that nanoparticle shapes change under the action of these fluids in the same way as in the process of thermal annealing. This analogy suggests that the observed effects could be explained by acceleration of atomic diffusion over the islet surfaces. It was noticed also that the resistance of thick granular films changes abruptly several minutes after pouring such film with ethanol. This jump of resistance is also very similar to the resistance jump observed previously in the case of annealing. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink