NDLI: Facet-Dependent Optical Properties Revealed through Investigation of Polyhedral $Au–Cu_{2}O$ and Bimetallic Core

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Facet-Dependent Optical Properties Revealed through Investigation of Polyhedral $Au–Cu_{2}O$ and Bimetallic Core–Shell Nanocrystals

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Huang, Michael H. Rej, Sourav Chiu, Chun-Ya
Description	Country affiliation: Taiwan Author Affiliation: Huang MH ( Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan.); Rej S ( Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan.); Chiu CY ( Department of Chemistry, National Tsing Hua University, Hsinchu, 30013, Taiwan.)
Abstract	The ability to prepare $Au–Cu_{2}O$ core–shell nanocrystals with precise control over particle size and shape has led to the discovery of facet-dependent optical properties in cuprous oxide crystals. The use of Au cores not only allows the successful formation of $Au–Cu_{2}O$ core–shell nanocrystals with tunable sizes, but also enables the observation of facet-dependent optical properties in these crystals through the Au localized surface plasmon resonance (LSPR) absorption band. By tuning the $Cu_{2}O$ shell morphology from rhombic dodecahedral to octahedral and cubic structures, and thus the exposed facets, the Au LSPR band position can be widely tuned. Such facet-dependent optical effects are not observed in bimetallic Au–Ag and Au–Pd core–shell nanocrystals with the same precisely tuned particle sizes and shapes. It is believed that similar facet-dependent optical properties could be observed in other ionic solids and other metal–metal oxide systems. The unusually large degree of plasmonic band tuning covering from the visible to the near-infrared region in this type of nanostructure should be quite useful for a range of plasmonic applications.
File Format	HTM / HTML
ISSN	16136810
Issue Number	23
Journal	Small
Volume Number	11
e-ISSN	16136829
Language	English
Publisher	Wiley-VCH
Publisher Date	2015-06-01
Publisher Place	Germany
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Chemistry Nanoscience and Nanotechnology Medicine Biomaterials Engineering Biotechnology

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