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- W1997735970 abstract "This article presents a quantitative analysis of the role played by poly(vinylpyrrolidone) (PVP) in seed-mediated growth of Ag nanocrystals. Starting from Ag nanocubes encased by {100} facets as the seeds, the resultant nanocrystals could take different shapes depending on the concentration of PVP in the solution. If the concentration was above a critical value, the seeds simply grew into larger cubes still enclosed by {100} facets. When the concentration fell below a critical value, the seeds would evolve into cuboctahedrons enclosed by a mix of {100} and {111} facets and eventually octahedrons completely covered by {111} facets. We derived the coverage density of PVP on Ag(100) surface by combining the results from two measurements: (i) cubic seeds were followed to grow at a fixed initial concentration of PVP to find out when {111} facets started to appear on the surface, and (ii) cubic seeds were allowed to grow at reduced initial concentrations of PVP to see at which concentration {111} facets started to appear from the very beginning. We could calculate the coverage density of PVP from the differences in PVP concentration and the total surface area of Ag nanocubes between these two samples. The coverage density was found to be 140 and 30 repeating units per nm(2) for PVP of 55,000 and 10,000 g/mol in molecular weight, respectively, for cubic seeds of 40 nm in edge length. These values dropped slightly to 100 and 20 repeating units per nm(2), respectively, when 100 nm Ag cubes were used as the seeds." @default.
- W1997735970 created "2016-06-24" @default.
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- W1997735970 date "2012-01-13" @default.
- W1997735970 modified "2023-10-12" @default.
- W1997735970 title "Quantitative Analysis of the Role Played by Poly(vinylpyrrolidone) in Seed-Mediated Growth of Ag Nanocrystals" @default.
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- W1997735970 doi "https://doi.org/10.1021/ja210047e" @default.
- W1997735970 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3274755" @default.
- W1997735970 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22206387" @default.
- W1997735970 hasPublicationYear "2012" @default.
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