NDLI: Ordered Au nanocrystals on a substrate formed by light-induced rapid annealing

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Yiting Chen, Xi Li, Qiang Qiu, Min Zhao, Ding Dai, Jin Yan, Min
Copyright Year	2014
Abstract	Light-induced rapid annealing (LIRA) is a widely used method to modify the morphology and crystallinity of noble metal nanoparticles, and the nanoparticles generally evolve into nanospheres. It is rather challenging to form faceted Au nanocrystals on a substrate using LIRA. Here the formation of spatially ordered Au nanocrystals using a continuous wave infrared laser is reported, assisted by a metamaterial perfect absorber. Faceted Au nanocrystals in truncated-octahedral or multi-twinned geometries can be obtained. The evolution of morphology and crystallinity of the Au nanoparticles during laser annealing is also revealed, where the crystal grain growth and the surface melting are shown to play key roles in nanocrystal formation. The evolution of morphology also gives the freedom of tuning the absorption spectrum of the metamaterial absorber. These findings provide a novel way for tailoring the morphology and crystallinity of metallic nanoparticles and may pave the way to fabricate refined nano-devices in many potential applications for optics, electronics, catalysis, surface-chemistry and biology.
Starting Page	1756
Ending Page	1762
Page Count	7
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	6
Issue Number	3
Journal	Nanoscale
DOI	10.1039/c3nr05745c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Absorption spectroscopy Infrared Grain growth Laser Metamaterial absorber Noble metal Biology Metamaterial Nanocrystal Nucleic acid thermodynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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