|
|||||
|
|
Self‐Assembled Silver–Gold Nanoisland Films on Glass for SERS Applications |
|
| Authors: | Ekaterina Babich Alexey Redkov Igor Reduto Andrey Lipovskii |
| Institution: | 1. Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia;2. Institute of Problems of Mechanical Engineering RAS, St. Petersburg, Russia;3. Department of Physics and Technology of Nanostructures, St. Petersburg Academic University RAS, St. Petersburg, Russia;4. Institute of Photonics, University of Eastern Finland, Joensuu, Finland |
| Abstract: | We present a study of resonant optical properties of gold‐protected silver nanoisland films. Silver nanoislands were grown on a glass substrate using out‐diffusion technique, the growth was followed by the deposition of nanometer‐thick gold coatings. Scanning electron microscopy and optical spectroscopy were used to characterize morphology and extinction spectra of the grown combined silver–gold nanostructures. Micro Raman spectroscopy of the combined nanoislands has demonstrated their signal enhancement factor exceeding that one of the initial silver nanoislands. |
| Keywords: | core– shell nanoparticles gold nanoislands plasmonics silver surface‐enhanced Raman spectroscopy |