Ultrafast Light-Controlled Growth of Silver Nanoparticles for Direct Plasmonic Color Printing.
basic_science · Level V
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- Record sourced from PubMed, PMID 30153416.
- Also identified by DOI 10.1021/acsnano.8b02868.
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Abstract
A precision photoreduction technology for the ultrafast high-precision light-controlled growth of silver nanoparticles for printing plasmonic color images is presented. Ultraviolet (UV) patterns with about a million pixels are generated to temporally and spatially regulate the photoreduction of silver salts to precisely create around a million clusters of distinct silver nanoparticles on a titanium dioxide (TiO<sub>2</sub>)-capped quartz substrate. The silver nanoparticle-TiO<sub>2</sub>-quartz structure exhibits a Fano-like reflection spectrum, whose spectral dip can be tuned by the dimension of the silver nanoparticles for plasmonic color generation. This technology allows the one-step production of multiscale engineered large-area plasmonic substrates without the use of either nanostructured templates or additional nanofabrication processes and thus offers an approach to plasmonic engineering for a myriad of applications ranging from structural color decoration to plasmonic microdevices and biosensors.