Abstract: Au nanoflowers with diameter about 250 nm have been synthesized by a one-step method without surface modifier. There are many characte-ristic methods to be used to research the structure and formation mechanism of the Au nanoflowers, such as scanning and transmission electron microscopy (SEM and TEM), selected area electron diffraction SAED analyses, and X-ray diffraction (XRD). The growth mechanism has been well simulated and predicted by employing growth model to explain morphological evolution of kinetics mechanism. For testing p-mercapto benzoic acid (PMBA) molecule, the Au nanoflowers have exhibited the high surface-enhanced Raman scattering activity, and the enhancement factor (EF) can reach as high as 7.5×105. In view of unique properties, the Au nanoflowers as high-performance SERS substrates appear to be very promising for applications.
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