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A new route to gold nanoflowers
- Catanionic vesicles spontaneously formed by mixing the anionic surfactant bis(2-ethylhexyl)sulfosuccinate sodium salt with the cationic surfactant cetyltrimethylammonium bromide were used as a reducing medium to produce gold clusters, which are embedded and well-ordered into the template phase. The gold clusters can be used as seeds in the growth process that follows by adding ascorbic acid as a mild reducing component. When the ascorbic acid was added very slowly in an ice bath round-edged gold nanoflowers were produced. When the same experiments were performed at room temperature in the presence of Ag+ ions, sharp-edged nanoflowers could be synthesized. The mechanism of nanoparticle formation can be understood to be a non-diffusion-limited Ostwald ripening process of preordered gold nanoparticles embedded in catanionic vesicle fragments. Surface-enhanced Raman scattering experiments show an excellent enhancement factor of 1.7 . 10(5) for the nanoflowers deposited on a silicon wafer.
Verfasserangaben: | Ferenc LiebigGND, Ricky Henning, Radwan Mohamed SarhanORCiDGND, Claudia Christina PrietzelGND, Matias BargheerORCiDGND, Joachim KoetzORCiDGND |
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DOI: | https://doi.org/10.1088/1361-6528/aaaffd |
ISSN: | 0957-4484 |
ISSN: | 1361-6528 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/29451134 |
Titel des übergeordneten Werks (Englisch): | Nanotechnology |
Verlag: | IOP Publ. Ltd. |
Verlagsort: | Bristol |
Publikationstyp: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Datum der Erstveröffentlichung: | 09.03.2018 |
Erscheinungsjahr: | 2018 |
Datum der Freischaltung: | 01.12.2021 |
Freies Schlagwort / Tag: | HRTEM; SEM; catanionic vesicles; crystal growth; gold cluster; gold nanoflowers |
Band: | 29 |
Ausgabe: | 18 |
Seitenanzahl: | 8 |
Fördernde Institution: | German Research FoundationGerman Research Foundation (DFG) [KO 1387/14-1, INST 336/64-1] |
Organisationseinheiten: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC-Klassifikation: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Peer Review: | Referiert |
Publikationsweg: | Open Access / Hybrid Open-Access |