Počet záznamů: 1
Excitation wavelength dependence of combined surface- and graphene-enhanced Raman scattering experienced by free-base phthalocyanine localized on single-layer graphene-covered Ag nanoparticle arrays
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SYSNO ASEP 0493614 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Excitation wavelength dependence of combined surface- and graphene-enhanced Raman scattering experienced by free-base phthalocyanine localized on single-layer graphene-covered Ag nanoparticle arrays Tvůrce(i) Sutrová, Veronika (UMCH-V) RID, ORCID
Šloufová, I. (CZ)
Mojzeš, P. (CZ)
Melníková, Zuzana (UFCH-W)
Kalbáč, Martin (UFCH-W) RID, ORCID
Vlčková, B. (CZ)Zdroj.dok. Journal of Physical Chemistry C. - : American Chemical Society - ISSN 1932-7447
Roč. 122, č. 36 (2018), s. 20850-20860Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova GERS ; SERS ; single layer graphene Vědní obor RIV CF - Fyzikální chemie a teoretická chemie Obor OECD Physical chemistry Vědní obor RIV – spolupráce Ústav fyzikální chemie J.Heyrovského - Fyzikální chemie a teoretická chemie CEP GA17-05007S GA ČR - Grantová agentura ČR LL1301 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy LM2015073 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy EF16_013/0001821 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy Institucionální podpora UMCH-V - RVO:61389013 ; UFCH-W - RVO:61388955 UT WOS 000444920900031 EID SCOPUS 85052324013 DOI 10.1021/acs.jpcc.8b06218 Anotace Hybrid systems constituted by plasmonic nanostructures and single-layer graphene (SLG) as well as their employment as platforms for surface-enhanced Raman scattering (SERS) of the molecular species have recently become a subject of interest. By contrast, only a few studies were targeted specifically on the combination of SERS with graphene-enhanced Raman scattering (GERS) of aromatic molecules. In this paper, we have investigated the mechanisms of combined SERS + GERS by micro-Raman spectral mapping of the hybrid system constituted by annealed Ag nanoparticles (NPs) on the glass substrate overdeposited first by SLG and, subsequently, by a monolayer (ML) of free-base phthalocyanine (H2Pc) molecules, as well as of glass/SLG/H2Pc(ML) and of graphite/H2Pc(ML) reference systems. Raman mapping was performed at multiple excitation wavelengths spanning the 532–830 nm range and was complemented by surface plasmon extinction and transmission electron microscopy images of the Ag NP platform. Observation of SERS + GERS in the aforementioned hybrid system was established by the determination of GERS, SERS, and SERS + GERS enhancement factors. By construction and the mutual comparison of GERS + SERS and GERS excitation profiles of H2Pc vibrational modes, operation of two mechanisms of GERS additively with the electromagnetic SERS enhancement in SERS + GERS of H2Pc in the glass/Ag NPs/SLG/H2Pc(ML) hybrid system has been ascertained. Finally, achievement of the same level of the weak negative doping of SLG by Ag NPs in the probed hybrid system and by glass in the reference system has been established as a necessary condition for the proper evaluation of mechanisms of combined SERS and GERS, and evidence for the fulfillment of this condition in the hybrid systems reported here was provided. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2019
Počet záznamů: 1