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Open Access Fluorescence enhancement of strip patterned silver nanoparticle platforms prepared by room-temperature imprinting technique

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Two-dimensional detective platform composed of metal nanoparticles has exhibited excellent performance in metal enhanced fluorescence. Here, we report the preparation of strip patterned silver nanoparticle (Ag NP) platforms by room-temperature imprinting and their fluorescence enhancement performance for a near-infrared fluorescent dye of cyanine-5. The poly(acrylic acid)/poly(allylamine hydrochloride) (PAA/PAH) multilayer film was constructed as the underlying film before the deposition of Ag NPs to provide the good compressibility and fluidity for the room-temperature imprinting. Subsequently, Ag NPs were spray-assembled on the underlying film of PAA/PAH. Depending on the sequence between the room-temperature imprinting and the spraying of Ag NPs, the pattern-spraying and the spray-patterning procedures were respectively implemented for fabricating strip patterned Ag NP platforms. The resulting patterned Ag NP platforms both exhibited stronger capabilities in fluorescence enhancement compared to the planar Ag NP platform. The pattern-sprayed Ag NP platform has a convex strip structure composed of Ag NP film and a fluorescence enhancement of 1.39-fold in comparison with the planar Ag NP platform. In contrast, the spray-patterned Ag NP platform possessed a higher improvement of 2.05-fold, relying on a concavo-convex strip structure. This work developed an alternative strategy for improving the fluorescence enhancement of metal NP platforms.

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Keywords: AG NANOPARTICLE; FLUORESCENCE ENHANCEMENT; LAYER-BY-LAYER ASSEMBLY; PATTERNING; ROOM-TEMPERATURE IMPRINTING; SPRAY ASSEMBLY

Document Type: Research Article

Publication date: June 1, 2018

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  • Materials Express is a peer-reviewed multidisciplinary journal reporting emerging researches on materials science, engineering, technology and biology. Cutting-edge researches on the synthesis, characterization, properties, and applications of a very wide range of materials are covered for broad readership; from physical sciences to life sciences. In particular, the journal aims to report advanced materials with interesting electronic, magnetic, optical, mechanical and catalytic properties for industrial applications.
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