Surface-Enhanced Raman Scattering on Gold Nanohole Arrays in Symmetrical Dielectric Environments Exhibiting Electric Field Extension

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985882%3A_____%2F16%3A00469641" target="_blank" >RIV/67985882:_____/16:00469641 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b08294" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.6b08294</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.6b08294" target="_blank" >10.1021/acs.jpcc.6b08294</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface-Enhanced Raman Scattering on Gold Nanohole Arrays in Symmetrical Dielectric Environments Exhibiting Electric Field Extension

Popis výsledku v původním jazyce

The electromagnetic enhancement in surface enhanced Raman scattering (SERS) caused by localized surface plasmon resonance is a near-field effect, often limiting the practicality of SERS in many applications. However, no attempts have been made to investigate field extension through symmetrical refractive index modulation in a SERS-based system. Here, we report the development and characterization of refractive index-matched SERS substrates supporting electric field extension to realize what is termed "long-range SERS" (LR-SERS). Finite-difference time-domain simulations were employed to tune the plasmonic responses and investigate electric field distributions of gold nanohole arrays (NHAs) as a function of the dielectric environment and geometric parameters. SERS substrates supporting long-range behavior were compared against "conventional" substrates without long-range behavior. SERS intensities from rhodamine 6G (R6G) aqueous solutions of 2.0 X 10(8) and 1.5 X 10(2) counts s(-1)mW(-1) were produced by the LR-SERS and conventional substrates, respectively, on the gold surface. Moreover, a signal response of 9.0 x 10(1) counts s-imlArl was produced by LR-SERS substrates with a 10 nm separation between the R6G solution and NHA, while no signal was observed from the conventional substrate. As a proof of principle study, the results demonstrate the potential to use LR-SERS substrates in applications where the target analyte is located further from the SERS-active surface

Název v anglickém jazyce

Surface-Enhanced Raman Scattering on Gold Nanohole Arrays in Symmetrical Dielectric Environments Exhibiting Electric Field Extension

Popis výsledku anglicky

The electromagnetic enhancement in surface enhanced Raman scattering (SERS) caused by localized surface plasmon resonance is a near-field effect, often limiting the practicality of SERS in many applications. However, no attempts have been made to investigate field extension through symmetrical refractive index modulation in a SERS-based system. Here, we report the development and characterization of refractive index-matched SERS substrates supporting electric field extension to realize what is termed "long-range SERS" (LR-SERS). Finite-difference time-domain simulations were employed to tune the plasmonic responses and investigate electric field distributions of gold nanohole arrays (NHAs) as a function of the dielectric environment and geometric parameters. SERS substrates supporting long-range behavior were compared against "conventional" substrates without long-range behavior. SERS intensities from rhodamine 6G (R6G) aqueous solutions of 2.0 X 10(8) and 1.5 X 10(2) counts s(-1)mW(-1) were produced by the LR-SERS and conventional substrates, respectively, on the gold surface. Moreover, a signal response of 9.0 x 10(1) counts s-imlArl was produced by LR-SERS substrates with a 10 nm separation between the R6G solution and NHA, while no signal was observed from the conventional substrate. As a proof of principle study, the results demonstrate the potential to use LR-SERS substrates in applications where the target analyte is located further from the SERS-active surface

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BO - Biofyzika

OECD FORD obor

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Projekt

<a href="/cs/project/GBP205%2F12%2FG118" target="_blank" >GBP205/12/G118: Nanobiofotonika pro medicínu budoucnosti</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

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Svazek periodika

120

Číslo periodika v rámci svazku

44

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

25519-25529

Kód UT WoS článku

000387737900039

EID výsledku v databázi Scopus

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