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Identification of a source of size polydispersity and its solution in Brust-Schiffrin metal nanoparticle synthesis

Ying Li1, Oksana Zaluzhna, YuYe J Tong

  • 1Department of Chemistry, Georgetown University, 37th and "O" Streets NW, Washington DC 20057, USA.

Chemical Communications (Cambridge, England)
|April 29, 2011
PubMed

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For any given polymer, the weight average molecular weight (Mw) is higher than, if not equal to, the number average molecular weight (Mn). The only situation in which the weight average molecular weight and the number average molecular weight are equal is when a polymer consists only of chains with equal molecular weight. However, this never happens in a synthetic polymer, since it is difficult to control the polymerization process up to a molecular level with accuracy to a hundred percent.