你可以看看这篇文章
Anisotropic Overgrowth of Metal Heterostructures Induced by a Site-Selective Silica Coating
其中有一句话是： In the first step, the Au nanorod solution (12 mL) was
centrifuged at 6800 g for 30 min. The precipitate was re-dispersed into a CTAB solution (12
mL, 0.1 M)。
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