- search hit 1 of 1
Tuned Surface-Enhanced raman scattering performance of undulated Au@Ag triangles
- Negatively charged ultraflat gold nanotriangles (AuNTs) stabilized by the anionic surfactant dioctyl sodium sulfosuccinate (AOT) were reloaded with the cationic surfactant benzylhexadecyldimethylammonium chloride (BDAC). Because of the spontaneous formation of a catanionic AOT micelle/BDAC bilayer onto the surface of the reloaded AuNTs, a reduction of Ag+ ions leads to the formation of spherical silver nanoparticles (AgNPs). With increasing concentration of AgNPs on the AuNTs, the localized surface plasmon resonance (LSPR) is shifted stepwise from 1300 to 800 nm. The tunable LSPR enables to shift the extinction maximum to the wavelength of the excitation laser of the Raman microscope at 785 nm. Surface-enhanced Raman scattering (SERS) experiments performed under resonance conditions show an SERS enhancement factor of the analyte molecule rhodamine RG6 of 5.1 X 10(5), which can be related to the silver hot spots at the periphery of the undulated gold nanoplatelets.
Author details: | Ferenc LiebigGND, Radwan Mohamed SarhanORCiDGND, Claudia Christina PrietzelGND, Clemens Nikolaus Zeno SchmittORCiDGND, Matias BargheerORCiDGND, Joachim KoetzORCiDGND |
---|---|
DOI: | https://doi.org/10.1021/acsanm.8b00570 |
ISSN: | 2574-0970 |
Title of parent work (English): | ACS applied nano materials |
Publisher: | American Chemical Society |
Place of publishing: | Washington |
Publication type: | Article |
Language: | English |
Date of first publication: | 2018/04/27 |
Publication year: | 2018 |
Release date: | 2021/12/13 |
Tag: | LSPR; SERS; catanionic surfactant bilayer; gold nanotriangles; undulated nanoplatelets |
Volume: | 1 |
Issue: | 4 |
Number of pages: | 17 |
First page: | 1995 |
Last Page: | 2003 |
Funding institution: | German Research FoundationGerman Research Foundation (DFG) [KO 1387/14-1, INST 336/64-1] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften |
Peer review: | Referiert |