Reduction by the End Groups of Poly(vinyl pyrrolidone): A New and Versatile Route to the Kinetically Controlled Synthesis of Ag Triangular Nanoplates


  • This work was supported in part by a grant from the NSF (DMR-0451788), a subcontract from the NSF-funded MERSEC program awarded to the UW, and a fellowship from the David and Lucile Packard Foundation. Y. X. is a Camille Dreyfus Teacher Scholar (2002–2007). I. W. was a visiting student from Tokyo Institute of Technology and partially supported by a research fellowship from the Japan Society for the Promotion of Science (JSPS) for Young Scientists. Y. Y. was supported by the Director, Office of Science, U.S. Department of Energy, under Contract DE-AC03-76SF00098. This work used the Nanotech User Facility (NTUF) at UW, a member of the National Nanotechnology Infrastructure Network (NNIN) funded by the NSF. We thank the Molecular Foundry at the Lawrence Berkeley National Laboratory for HRTEM analysis. Supporting Information is available online from Wiley InterScience or from the author.


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The hydroxyl end group of poly(vinyl pyrrolidone) (PVP) has been utilized for the first time to reduce AgNO3 in water, generating the Ag triangular nanoplates shown in the figure via kinetic control. PVP is widely used in the chemical synthesis of many types of colloidal nanocrystals, where it is mainly considered as a steric stabilizer or capping agent that protects the product from agglomeration. It is believed that this new strategy can be extended to other noble metals and polymers.