SERS of Isotopically Labeled C-12/C-13 Graphene Bilayer-Gold Nanostructured Film Hybrids: Graphene Layer as Spacer and SERS Probe

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F17%3A00482703" target="_blank" >RIV/61388955:_____/17:00482703 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/17:00482703 RIV/00216208:11310/17:10362181 RIV/00216208:11320/17:10362181

Výsledek na webu

<a href="http://dx.doi.org/10.1021/acs.jpcc.7b02585" target="_blank" >http://dx.doi.org/10.1021/acs.jpcc.7b02585</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.7b02585" target="_blank" >10.1021/acs.jpcc.7b02585</a>

Jazyk výsledku

angličtina

Název v původním jazyce

SERS of Isotopically Labeled C-12/C-13 Graphene Bilayer-Gold Nanostructured Film Hybrids: Graphene Layer as Spacer and SERS Probe

Popis výsledku v původním jazyce

Single layer graphene (SLG) is envisaged to improve significantly the substrates for surface-enhanced Raman scattering of planar aromatic molecules as it can ensure a more even enhancement at different places of the substrate. For this purpose, the role of SLG as a spacer in such SERS platforms has to be addressed. Here, we report preparation and Raman spectral probing of hybrid systems constituted by 13 C/ 12 C bilayer graphene covered by 15 nm thick nanostructured gold. Hybrids with both the 13 C over 12 C layers and in the flipped geometry, and with both the turbostratic and the A-B stacked order have been investigated, and qualitative as well as quantitative information about the enhancement experienced by phonons of the individual graphene layers by the electromagnetic mechanism (EM) of SERS were obtained. In hybrids system under study, the top layer of the isotopically labeled bilayer graphene represents the SLG spacer, while the bottom layer mimics a monolayer of target planar aromatic molecules. Importantly, both the calculation and the experiment based chiefly on comparison of the relative intensity ratio of the clearly distinguished 13 C layer and 12 C layer G mode bands jointly indicate that the enhancement of Raman scattering of the molecular monolayer on SLG spacer by the EM mechanism of SERS will be only 0.7 times lower than that of a monolayer located directly on the nanostructured Au surface.

Název v anglickém jazyce

SERS of Isotopically Labeled C-12/C-13 Graphene Bilayer-Gold Nanostructured Film Hybrids: Graphene Layer as Spacer and SERS Probe

Popis výsledku anglicky

Single layer graphene (SLG) is envisaged to improve significantly the substrates for surface-enhanced Raman scattering of planar aromatic molecules as it can ensure a more even enhancement at different places of the substrate. For this purpose, the role of SLG as a spacer in such SERS platforms has to be addressed. Here, we report preparation and Raman spectral probing of hybrid systems constituted by 13 C/ 12 C bilayer graphene covered by 15 nm thick nanostructured gold. Hybrids with both the 13 C over 12 C layers and in the flipped geometry, and with both the turbostratic and the A-B stacked order have been investigated, and qualitative as well as quantitative information about the enhancement experienced by phonons of the individual graphene layers by the electromagnetic mechanism (EM) of SERS were obtained. In hybrids system under study, the top layer of the isotopically labeled bilayer graphene represents the SLG spacer, while the bottom layer mimics a monolayer of target planar aromatic molecules. Importantly, both the calculation and the experiment based chiefly on comparison of the relative intensity ratio of the clearly distinguished 13 C layer and 12 C layer G mode bands jointly indicate that the enhancement of Raman scattering of the molecular monolayer on SLG spacer by the EM mechanism of SERS will be only 0.7 times lower than that of a monolayer located directly on the nanostructured Au surface.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

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

—

Svazek periodika

121

Číslo periodika v rámci svazku

21

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

11680-11686

Kód UT WoS článku

000402775200075

EID výsledku v databázi Scopus

2-s2.0-85020639147