Abstract
Herein, we have presented a novel and easy to operate seed-mediated system for fabricating gold bipyramids (AuBPs) with 85% yields without any separation/purification processes. The used gold seeds are reduced by tannin and citrate, two kinds of air stable ligands, and conventionally employed unstable NaBH4 are thoroughly cast off. In addition, the as-proposed gold seeds can also be employed for AuNRs fabrication with rather larger diameters (22.2–60.3 nm), which is difficult to be achieved by conventional seed mediated fabrication system.
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