title: Formation Regularities of Plasmonic Silver Nanostructures on Porous Silicon for Effective Surface-Enhanced Raman Scattering.
abstract: Plasmonic nanostructures demonstrating an activity in the surface-enhanced Raman scattering (SERS) spectroscopy have been fabricated by an immersion deposition of silver nanoparticles from silver salt solution on mesoporous silicon (meso-PS). The SERS signal intensity has been found to follow the periodical repacking of the silver nanoparticles, which grow according to the Volmer-Weber mechanism. The ratio of silver salt concentration and immersion time substantially manages the SERS intensity. It has been established that optimal conditions of nanostructured silver layers formation for a maximal Raman enhancement can be chosen taking into account a special parameter called effective time: a product of the silver salt concentration on the immersion deposition time. The detection limit for porphyrin molecules CuTMPyP4 adsorbed on the silvered PS has been evaluated as 10(-11) M.
authors.affiliation: Laboratory of Materials and Structures of Nanoelectronics, Belarusian State University of Informatics and Radioelectronics, 6 Brovka st., Minsk, 220013, Belarus. h.bandarenka@bsuir.by.
authors.forename: Hanna V
authors.initials: HV
authors.lastname: Bandarenka
authors.affiliation: Laboratory of Materials and Structures of Nanoelectronics, Belarusian State University of Informatics and Radioelectronics, 6 Brovka st., Minsk, 220013, Belarus.
authors.forename: Kseniya V
authors.initials: KV
authors.lastname: Girel
authors.affiliation: Laboratory of Materials and Structures of Nanoelectronics, Belarusian State University of Informatics and Radioelectronics, 6 Brovka st., Minsk, 220013, Belarus.
authors.forename: Vitaly P
authors.initials: VP
authors.lastname: Bondarenko
authors.affiliation: B.I. Stepanov Institute of Physics of National Academy of Sciences of Belarus, 68 Nezalezhnasti av., Minsk, 220072, Belarus.
authors.forename: Inna A
authors.initials: IA
authors.lastname: Khodasevich
authors.affiliation: B.I. Stepanov Institute of Physics of National Academy of Sciences of Belarus, 68 Nezalezhnasti av., Minsk, 220072, Belarus.
authors.forename: Andrei Yu
authors.initials: AY
authors.lastname: Panarin
authors.affiliation: B.I. Stepanov Institute of Physics of National Academy of Sciences of Belarus, 68 Nezalezhnasti av., Minsk, 220072, Belarus.
authors.forename: Sergei N
authors.initials: SN
authors.lastname: Terekhov
keywords: Detection limit; Immersion deposition; Porous silicon; Silver nanoparticles; Surface-enhanced Raman scattering