Abstract
We describe here that fine control of nanoparticle shape and size can be achieved by systematic variation of experimental parameters in the seeded growth procedure in aqueous solution. Cubic and spherical gold nanoparticles are obtained respectively. In particularly, the Au cubes are highly monodisperse in 33±2 nm diameter. The experimental methods involve the preparation of Au seed particles and the subsequent addition of an appropriate quantity of Au seed solution to the aqueous growth solutions containing desired quantities of CTAB and ascorbic acid (AA). Here, AA is a weak reducing agent and CTAB is not only a stable agent for nanoparticles but also an inductive agent for leading increase in the face of nanoparticle. Ultraviolet visible spectroscopy (UV-vis), X-ray diffraction (XRD), transmission electron microscopy (TEM) are used to characterize the nanoparticles. The results show that the different size gold nanoparticles displayed high size homogenous distribution and formed mono-membrane at the air/solid interface.
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Supported by the Chinese Academy of Sciences and National Natural Science Foundation of China (Grant No. 90207026)
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Fu, Y., Du, Y., Yang, P. et al. Shape-controlled synthesis of highly monodisperse and small size gold nanoparticles. SCI CHINA SER B 50, 494–500 (2007). https://doi.org/10.1007/s11426-007-0085-x
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DOI: https://doi.org/10.1007/s11426-007-0085-x