title: Tuning the LSPR in copper chalcogenide nanoparticles by cation intercalation, cation exchange and metal growth.
abstract: Localized surface plasmon resonances (LSPRs) of degenerately doped copper chalcogenide nanoparticles (NPs) (Cu2-xSe berzelianite and Cu1.1S covellite) have been modified applying different methods. The comparison of the cation exchange (Cu2-xSe) and intercalation (Cu1.1S) of Ag(I) and Cu(I) has shown that Ag(I) causes a non reversible, air stable shift of the LSPR. This was compared to the influence of Au(I) cation exchange into Cu1.1S platelets under the formation of Cu1.1S-Au2S mixed nanoplatelets. Furthermore, we show the growth of Au domains on Cu2-xSe, and discuss the interaction of the two plasmonic parts of the obtained dual plasmonic Cu2-xSe-Au hybrid particles.
authors.affiliation: Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstr. 3A, 30167 Hannover, Germany. dirk.dorfs@pci.uni-hannover.de.
authors.forename: Andreas
authors.initials: A
authors.lastname: Wolf
authors.forename: Torben
authors.initials: T
authors.lastname: Kodanek
authors.forename: Dirk
authors.initials: D
authors.lastname: Dorfs