Double-layered NiPt nanobowls with ultrathin shell synthesized in water at room temperature

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Abstract
Double-layered NiPt nanobowls with diameter of ∼200 nm and layer thickness of ∼3 nm have been synthesized through a “one-pot” route in water at room temperature without pre-made templates. The nanobowls are self-assembled with asymmetric double layers and exhibit alignment behavior with different orientation on silicon wafer within different dispersant solutions. The as-prepared nanobowls can serve as fluorescence modifiers of Rhodamine 6G (R6G) molecules, attributed to their bowl-like shape with a hollow cavity between layers. It provides a new facile route for synthesis and manipulation of bowl-like nanostructures through a self-assembly method without pre-made templates.

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