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.
Fichthorn, Kristen A.
中科院分区:
材料科学1区
文献类型:
--
作者:
Al-Saidi, W. A.;Feng, Haijun;Fichthorn, Kristen A.

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我们使用密度泛函理论来解决的作用,聚乙烯吡咯烷酮(PVP)的形状选择性合成的银纳米结构。在链段水平,PVP与Ag(100)的结合比与Ag(111)的结合更强,这是因为直接结合和货车范德华吸引力之间的表面敏感平衡。在链水平上,相关片段结合导致PVP强烈偏好结合Ag(100)。我们的研究强调了小分子和聚合物结构导向剂之间的差异。
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.