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- W3142610625 abstract "Three-dimensional (3D) gold nanoflowers of 60-80 nm in diameter were successfully synthesized using polyvinyl pyrrolidone (PVP) as both a protecting agent and a reducing agent in alkaline aqueous solutions. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images revealed that many antennae of 10-15 nm existed on their surfaces. X-ray diffraction (XRD) pattern suggested face-centered cubic (fcc) structures for these gold nanoflowers. The selected area electron diffraction (SAED) pattern of a single gold nanoflower indicated polycrystal characteristics. We found that there were three key stages in the growth of the gold nanoflowers: primary nanocrystals agglomerated to form multipod-like nanoparticles, and then the multipod-like nanoparticles aggregated into loose flower-like nanoparticles that ultimately grew into compact gold nanoflowers through Ostwald ripening. During the synthesis of gold nanoflowers, the molar ratios of PVP/HAuCl4 at fixed HAuCl4 and NaOH concentrations mostly influenced the morphologies of the final products. Therefore, a proper molar ratio of PVP/HAuCl4 and a suitable NaOH concentration were essential for the synthesis of typical gold nanoflowers with controlled sizes and antenna architectures." @default.
- W3142610625 created "2021-04-13" @default.
- W3142610625 creator A5047433871 @default.
- W3142610625 date "2011-01-01" @default.
- W3142610625 modified "2023-09-27" @default.
- W3142610625 title "Facile Synthesis of Gold Nanoflowers in a Polyvinyl Pyrrolidone Alkaline Aqueous Solution" @default.
- W3142610625 hasPublicationYear "2011" @default.
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