Adsorption of Polyvinylpyrrolidone on Ag Surfaces: Insight into a Structure-Directing Agent
Adsorption of Polyvinylpyrrolidone on Ag Surfaces: Insight into a Structure-Directing Agent
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DOI:
10.1021/nl2041113
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发表时间:
2012-02-01
期刊:
影响因子:
10.8
通讯作者:
Fichthorn, Kristen A.
中科院分区:
文献类型:
--
作者:
Al-Saidi, W. A.;Feng, Haijun;Fichthorn, Kristen A.
We use density functional theory to resolve the role of polyvinylpyrrolidone (PVP) in the shape-selective synthesis of Ag nanostructures. At the segment level, PVP binds more strongly to Ag(100) than Ag(111) because of a surface-sensitive balance between direct binding and van der Waals attraction. At the chain level, correlated segment binding leads to a strong preference for PVP bind to Ag(100). Our study underscores differences between small-molecule and polymeric structure-directing agents.