The Effect of Silver Grating and Nanoparticles Grafting for LSP-SPP Coupling and SERS Response Intensification

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F16%3A00242817" target="_blank" >RIV/68407700:21230/16:00242817 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22330/16:43902152 RIV/60461373:22810/16:43902152 RIV/60461373:22310/16:43902152

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b01587" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.6b01587</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b01587" target="_blank" >10.1021/acs.jpcc.6b01587</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Effect of Silver Grating and Nanoparticles Grafting for LSP-SPP Coupling and SERS Response Intensification

Popis výsledku v původním jazyce

The systematic study of structures with gold and silver nanoparticles (MeNPs) of various shape and dielectric function immobilized onto the silver grating is performed. The structures may serve as double resonance SERS (Surface-enhanced Raman spectroscopy) systems with the coupling between surface plasmon polaritons (SPPs) supported by the silver grating and localized surface plasmons (LSPs) excited on the grafted metals 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 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 the significant SERS signal is produced by R6G or BFDT molecules. The properties of the prepared structures are simulated using Finite-difference time-domain method (FDTD). Measured and simulated SERS data are in reasonable agreement, the measured values being lower than those calculated.

Název v anglickém jazyce

The Effect of Silver Grating and Nanoparticles Grafting for LSP-SPP Coupling and SERS Response Intensification

Popis výsledku anglicky

The systematic study of structures with gold and silver nanoparticles (MeNPs) of various shape and dielectric function immobilized onto the silver grating is performed. The structures may serve as double resonance SERS (Surface-enhanced Raman spectroscopy) systems with the coupling between surface plasmon polaritons (SPPs) supported by the silver grating and localized surface plasmons (LSPs) excited on the grafted metals 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 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 the significant SERS signal is produced by R6G or BFDT molecules. The properties of the prepared structures are simulated using Finite-difference time-domain method (FDTD). Measured and simulated SERS data are in reasonable agreement, the measured values being lower than those calculated.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20201 - Electrical and electronic engineering

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

The Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

—

Svazek periodika

120

Číslo periodika v rámci svazku

19

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

10569-10577

Kód UT WoS článku

000376417500049

EID výsledku v databázi Scopus

2-s2.0-84971276186