Core–shell colloidal particles with dynamically tunable scattering properties,Soft Matter

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Core–shell colloidal particles with dynamically tunable scattering properties
Soft Matter ( IF 2.9 ) Pub Date : 2017-08-30 00:00:00 , DOI: 10.1039/c7sm01740e
Guangnan Meng _{1,

2,

3,

4} , Vinothan N. Manoharan _{1,

2,

3,

4,

5} , Adeline Perro _{6,

7,

8,

9,

10}

Affiliation

We design polystyrene–poly(N′-isopropylacrylamide-co-acrylic acid) core–shell particles that exhibit dynamically tunable scattering. We show that under normal solvent conditions the shell is nearly index-matched to pure water, and the particle scattering is dominated by Rayleigh scattering from the core. As the temperature or salt concentration increases, both the scattering cross-section and the forward scattering increase, characteristic of Mie scatterers. The magnitude of the change in the scattering cross-section and scattering anisotropy can be controlled through the solvent conditions and the size of the core. Such particles may find use as optical switches or optical filters with tunable opacity.

中文翻译：

具有动态可调散射特性的核-壳胶体粒子

我们设计了表现出动态可调散射的聚苯乙烯-聚（N'-异丙基丙烯酰胺-共丙烯酸）核-壳颗粒。我们表明，在正常的溶剂条件下，壳层几乎与纯水折射率匹配，并且粒子的散射主要由来自核心的瑞利散射控制。随着温度或盐浓度的增加，散射截面和正向散射都增加，这是Mie散射体的特征。散射截面的变化幅度和散射各向异性可以通过溶剂条件和核的大小来控制。这样的颗粒可以用作具有可调的不透明度的光学开关或滤光器。

更新日期：2017-09-13

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