The effect of silver grating and nanoparticles grafting for LSP-SPP coupling and SERS response intensification

Y. Kalachyova, D. Mares, V. Jerabek, K. Zaruba, P. Ulbrich, L. Lapcak, V. Svorcik, O. Lyutakov

Research output: Contribution to journalArticle

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Abstract

The systematic study of structures with gold and silver nanoparticles (MeNPs) of various shapes and dielectric functions immobilized onto the silver grating is performed. The structures may serve as double resonance SERS (surface-enhanced Raman spectroscopy) systems with coupling between surface plasmon polariton (SPP) supported by the silver grating and localized surface plasmons (LSPs) excited on the grafted metal nanoparticles (MeNPs). The silver grating supports SPP excitation under the 785 nm wavelength illumination. Spherical silver and gold nanoparticles, triangular silver nanoprisms and gold nanorods are prepared and used with the aim to gradually cover the LSP excitation in the 400-850 nm wavelength range. MeNPs are grafted through the 4,4'-biphenyldithiol (BFDT) linkers. Rhodamine 6G (R6G) molecules are added onto SERS substrates and located above and between the MeNPs. Several wavelengths (470, 532, and 785 nm) are applied to probe the SERS response. Depending on the nanoparticles type and excitation wavelength a significant SERS signal is produced by R6G or BFDT molecules. Properties of the prepared structures are simulated using the Finite-difference time-domain method (FDTD). The measured and simulated SERS data are in reasonable agreement, the measured values being lower than those calculated.

Original languageEnglish
Pages (from-to)10569-10577
Number of pages9
JournalJournal of Physical Chemistry C
Volume120
Issue number19
DOIs
Publication statusPublished - 19 May 2016
Externally publishedYes

Fingerprint

Plasmons
plasmons
Silver
polaritons
Raman spectroscopy
silver
gratings
Nanoparticles
nanoparticles
Metal nanoparticles
Gold
Wavelength
gold
rhodamine
wavelengths
metals
excitation
Molecules
Finite difference time domain method
Nanorods

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

Cite this

The effect of silver grating and nanoparticles grafting for LSP-SPP coupling and SERS response intensification. / Kalachyova, Y.; Mares, D.; Jerabek, V.; Zaruba, K.; Ulbrich, P.; Lapcak, L.; Svorcik, V.; Lyutakov, O.

In: Journal of Physical Chemistry C, Vol. 120, No. 19, 19.05.2016, p. 10569-10577.

Research output: Contribution to journalArticle

Kalachyova, Y. ; Mares, D. ; Jerabek, V. ; Zaruba, K. ; Ulbrich, P. ; Lapcak, L. ; Svorcik, V. ; Lyutakov, O. / The effect of silver grating and nanoparticles grafting for LSP-SPP coupling and SERS response intensification. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 19. pp. 10569-10577.
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