AI Article Synopsis
- Gold nanoparticles (Au NPs) were created through sputter deposition in an ionic liquid, with their size varying from 2.6 to 4.8 nm after heat treatment.
- These nanoparticles were immobilized on a glass substrate modified with a silane agent featuring an imidazole group, using a solution and subsequent heat treatment.
- The films exhibited tunable optical properties and a strong localized surface plasmon resonance (LSPR), with enhanced photoluminescence in CdTe nanoparticles due to the electric field around the Au NPs.
Article Abstract
Gold (Au) nanoparticles were prepared by sputter deposition of Au metal in an ionic liquid (IL) of 1-butyl-3-methylimidazolium hexafluorophosphate (BMI-PF6). The size of Au nanoparticles was increased from 2.6 to 4.8 nm by heat treatment at 373 K. The nanoparticles uniformly dispersed in the IL were densely immobilized on a glass substrate surface modified with a silane coupling agent having an imidazole functional group by spreading the Au particle IL solution on the substrates, followed by heat treatment at 373 K. The optical property of the thus-obtained films was tunable by controlling the size of Au nanoparticles in the IL and the degree of immobilization. An intense localized surface plasmon resonance (LSPR) peak was observed in each Au particle film, and the wavelength of the LSPR peak could be controlled by changing the size of nanoparticles in the IL solution before immobilization. Photoexcitation of the LSPR peak caused enhancement of the photoluminescence of CdTe nanoparticles immobilized on Au nanoparticle films, probably due to the locally enhanced electric field formed around Au nanoparticles.
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| http://dx.doi.org/10.1039/b914230d | DOI Listing |
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