title: High-yield seedless synthesis of triangular gold nanoplates through oxidative etching.
abstract: We demonstrate that monodispersed triangular gold nanoplates with high morphological yield (>90%) can be synthesized through a rapid one-pot seedless growth process. The edge length of triangular Au nanoplates can be readily tuned between 40 and 120 nm by varying the reaction parameters. Systematic studies reveal that distinct from previous hypothesis that the formation of nanoplates is mainly determined by the selective binding of iodide ions, our results show that iodide ions could have dual functions: it can selectively bind to the Au {111} facets and also selectively remove other less stable shape impurities through oxidative etching by forming tri-iodide ions (I(3)(-)), thus facilitating the formation of nuclei with dominant planar structure. This new synthetic route will not only help to better understand the growth mechanism of triangular gold nanoplates but also promote the research in anisotropic noble metal nanostructures.
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University , Suzhou 215123, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Fei
authors.initials: F
authors.lastname: Ji
authors.forename: Yong
authors.initials: Y
authors.lastname: Xu
authors.forename: Liu
authors.initials: L
authors.lastname: He
authors.forename: Yifan
authors.initials: Y
authors.lastname: Mi
authors.forename: Feng
authors.initials: F
authors.lastname: Bao
authors.forename: Baoquan
authors.initials: B
authors.lastname: Sun
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Zhang
authors.forename: Qiao
authors.initials: Q
authors.lastname: Zhang
keywords: Gold nanoplates; SERS; seedless growth; surface plasmon resonance