Buchumschlag

Au-Ag hybrid nanoparticle patterns of tunable size and density on glass and polymeric supports

This paper describes a method to pattern surfaces with Au-Ag hybrid nanoparticles. We used block copolymer micelle lithography of Au nanoparticles and electroless deposition of Ag. The combination of these two methods enables independent tuning of nanoparticle spacing and Ag-shell size. For this pur...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Kruss, Sebastian (VerfasserIn) , Spatz, Joachim P. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 17 January 2012
In: Langmuir
Year: 2012, Jahrgang: 28, Heft: 2, Pages: 1562-1568
ISSN:1520-5827
DOI:10.1021/la204395d
Online-Zugang:Verlag, Volltext: http://dx.doi.org/10.1021/la204395d
Verlag, Volltext: https://doi.org/10.1021/la204395d
Volltext
Verfasserangaben:Sebastian Kruss, Vesna Srot, Peter A. van Aken, and Joachim P. Spatz
Beschreibung
Zusammenfassung:This paper describes a method to pattern surfaces with Au-Ag hybrid nanoparticles. We used block copolymer micelle lithography of Au nanoparticles and electroless deposition of Ag. The combination of these two methods enables independent tuning of nanoparticle spacing and Ag-shell size. For this purpose, 8 nm large patterned Au nanoparticle seeds served as nuclei for the electroless deposition of silver that is based on a modified Tollens process with glucose. By adjusting the reaction conditions, specific growth of Ag on top of the Au seeds has been accomplished and analyzed by SEM, HRTEM, XEDS, and UV-vis spectroscopy. We could show that this versatile and green method is feasible on glass as well as on biomedical-relevant polymers like poly(ethylene glycol) hydrogels and amorphous Teflon. In conclusion, this method provides a new route to pattern glass and polymeric surfaces with Au-Ag hybrid nanoparticles. It will have many uses in applications such as surface enhanced Raman spectroscopy (SERS) or antimicrobial coatings for which hybrid nanoparticle density, size, and morphology are important.
Beschreibung:Published: December 14, 2011
Gesehen am 04.10.2018
Beschreibung:Online Resource
ISSN:1520-5827
DOI:10.1021/la204395d

Ähnliche Einträge