| Autor: |
Mamonova DV; Institute of Chemistry, Saint-Petersburg State University, 26 Universitetskii Prospect, 198504 Saint-Petersburg, Russia., Vasileva AA; Institute of Chemistry, Saint-Petersburg State University, 26 Universitetskii Prospect, 198504 Saint-Petersburg, Russia., Petrov YV; Department of Physics, Saint-Petersburg State University, Ulyanovskaya 3, 198504 Saint-Petersburg, Russia., Koroleva AV; Center for Physical Methods of Surface Investigation, Research Park, Saint Petersburg University, Universitetskiy Prosp. 35, Lit. A, 198504 Saint-Petersburg, Russia., Danilov DV; Interdisciplinary Resource Center for Nanotechnology, Research Park, Saint-Petersburg State University, Ulyanovskaya 1, 198504 Saint-Petersburg, Russia., Kolesnikov IE; Center for Optical and Laser Materials Research, Research Park, Saint-Petersburg State University, Ulyanovskaya 5, 198504 Saint-Petersburg, Russia., Bikbaeva GI; Institute of Chemistry, Saint-Petersburg State University, 26 Universitetskii Prospect, 198504 Saint-Petersburg, Russia., Bachmann J; Institute of Chemistry, Saint-Petersburg State University, 26 Universitetskii Prospect, 198504 Saint-Petersburg, Russia.; Department of Chemistry and Pharmacy, Friedrich-Alexander University of Erlangen-Nürnberg, IZNF, Cauerstr. 3, 91058 Erlangen, Germany., Manshina AA; Institute of Chemistry, Saint-Petersburg State University, 26 Universitetskii Prospect, 198504 Saint-Petersburg, Russia. |
| Abstrakt: |
Multimetallic plasmonic systems usually have distinct advantages over monometallic nanoparticles due to the peculiarity of the electronic structure appearing in advanced functionality systems, which is of great importance in a variety of applications including catalysis and sensing. Despite several reported techniques, the controllable synthesis of multimetallic plasmonic nanoparticles in soft conditions is still a challenge. Here, mono-, bi- and tri-metallic nanoparticles were successfully obtained as a result of a single step laser-induced deposition approach from monometallic commercially available precursors. The process of nanoparticles formation is starting with photodecomposition of the metal precursor resulting in nucleation and the following growth of the metal phase. The deposited nanoparticles were studied comprehensively with various experimental techniques such as SEM, TEM, EDX, XPS, and UV-VIS absorption spectroscopy. The size of monometallic nanoparticles is strongly dependent on the type of metal: 140-200 nm for Au, 40-60 nm for Ag, 2-3 nm for Pt. Bi- and trimetallic nanoparticles were core-shell structures representing monometallic crystallites surrounded by an alloy of respective metals. The formation of an alloy phase took place between monometallic nanocrystallites of different metals in course of their growth and agglomeration stage. |
