Thin polymer-layer decorated, structure adjustable crystals of nanoparticles,Physical Chemistry Chemical Physics

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Thin polymer-layer decorated, structure adjustable crystals of nanoparticles
Physical Chemistry Chemical Physics ( IF 2.9 ) Pub Date : 2015-07-31 00:00:00 , DOI: 10.1039/c5cp01924a
Xue-Zheng Cao _{1,

2,

3,

4} , Zhi-Guang Duan _{1,

2,

3,

4} , Jun-Shu Wang _{1,

2,

3,

4} , Wei Cui _{4,

5,

6,

7} , Yong-Song Liu _{1,

2,

3,

4} , Chen-Xu Wu _{4,

5,

6,

7}

Affiliation

Flattened polymer chain decorated crystals of nanoparticles (NPs) are observed for polymer–NP mixtures confined between two parallel substrates. In order to minimize the entropy loss, polymer chains instead of NPs aggregate at the substrate surfaces when the number of NPs is high enough to have the conformation of chains significantly disturbed. Increasing NP concentration to be much higher than that of polymer chains leads to an ordered arrangement of NPs in the central region, which are sandwiched between two thin layers of polymer chains. A scaling model regarding polymer chains consisting of packed correlation blobs is provided to clarify the physics mechanism behind the formation of thin polymer layer and the crystallization of NPs. The order structure of the crystallized NPs is shown to be switchable through an adjustment of the bulk concentrations of polymer chains and NPs.

中文翻译：

薄聚合物层装饰的纳米颗粒可调节结构的晶体

对于封闭在两个平行基材之间的聚合物-NP混合物，可以观察到纳米颗粒（NP）的扁平聚合物链装饰晶体。为了使熵损失最小化，当NP的数量足够高到足以显着破坏链的构型时，聚合物链而不是NP在基底表面聚集。将NP浓度增加到远高于聚合物链的浓度会导致NP在中央区域的有序排列，这些NP夹在聚合物链的两个薄层之间。提供了有关由堆积相关斑点组成的聚合物链的缩放模型，以阐明聚合物薄层形成和NP结晶背后的物理机理。

更新日期：2015-07-31

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