Localized Surface Plasmon Resonances of Various Nickel Sulfide Nanostructures and Au-Ni3S2 Core-Shell Nanoparticles

Rasmus Himstedt, Pascal Rusch, Dominik Hinrichs, Torben Kodanek, Jannika Lauth, Sachin Kinge, Laurens D.A. Siebbeles, Dirk Dorfs

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)

Abstract

In this work, we investigate the occurrence of localized surface plasmon resonances (LSPRs) in different nickel sulfide nanostructures. Therefore, spherical and anisotropic nickel sulfide nanoparticles (NPs) are synthesized and analyzed regarding their optical properties by UV/vis/NIR and transient absorption spectroscopy. Furthermore, new pathways for the synthesis of spherical Ni3S2 nanodots with an extremely narrow size distribution, as well as Au-Ni3S2 core-shell NPs with controllable shell thickness, are presented. Our results show that NPs of different metallic nickel sulfide phases like Ni3S2 and Ni3S4 exhibit LSPR bands in the visible regime of the electromagnetic spectrum, which possibly makes them a comparably cheaper alternative to NPs consisting of noble metals like Au and Ag. In case of the presented plasmonic core-shell particles, the resonance frequency of the plasmon can be tuned between those of pure gold and pure Ni3S2 NPs by varying the Ni3S2 shell thickness.

Original languageEnglish
Pages (from-to)7371-7377
Number of pages7
JournalChemistry of Materials
Volume29
Issue number17
DOIs
Publication statusPublished - 12 Sep 2017

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