Статья

Poly(vinyl pyrrolidone): A Dual Functional Reductant and Stabilizer for the Facile Synthesis of Noble Metal Nanoplates in Aqueous Solutions

Yujie XiongDepartment of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of ChinaIsao WashioDepartment of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of ChinaJingyi ChenDepartment of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of ChinaHonggang CaiDepartment of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of ChinaZhiyuan LiDepartment of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of ChinaYounan XiaDepartment of Chemistry, University of Washington, Seattle, Washington 98195-1700, and Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China

2006en

ABI

Аннотация

Poly(vinyl pyrrolidone) (PVP) has been extensively used in the solution-phase synthesis of many types of colloidal particles, where it is mainly considered as a steric stabilizer or capping agent with a major role to protect the product from agglomeration. In a recent study, we discovered that the hydroxyl end groups of PVP could also serve as a very mild reductant for kinetically controlled synthesis of Ag nanoplates with yields as high as 75%. Here we further demonstrate that hydroxyl-terminated PVP is also a well-suited reductant for the aqueous synthesis of circular, triangular, and hexagonal nanoplates made of other noble metals including Pd, Au, and Pt. The reduction kinetics of a metal salt by the hydroxyl end groups of PVP can be maneuvered in at least two different ways to facilitate the evolution of plate morphology: (i) by adjusting the molar ratio of PVP to the salt precursor and (ii) by altering the molecular weight of PVP. Unlike previously reported studies of Ag and Au thin plates, light was found to have a negligible role in the present synthesis.

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Идентификаторы

DOI: 10.1021/la061323x

Цитирования и источники

Цитирований: 2Использованных источников: 0

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