Binary Colloidal Crystal Films Grown by Vertical Evaporation of Silica Nanoparticle Suspensions,Langmuir

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Binary Colloidal Crystal Films Grown by Vertical Evaporation of Silica Nanoparticle Suspensions
Langmuir ( IF 3.7 ) Pub Date : 2017-09-19 00:00:00 , DOI: 10.1021/acs.langmuir.7b02553
Jennifer L. Russell ₁ , Grace H. Noel ₁ , Joseph M. Warren ₁ , Ngoc-Lan L. Tran ₁ , Thomas E. Mallouk ₁

Affiliation

Despite intensive research efforts in the synthesis of binary colloidal crystals, the production of well ordered binary colloidal crystal films over large areas continues to be synthetically challenging. In this paper, we investigate the phase behavior of binary mixtures of l-arginine-stabilized 36 and 22 nm silica nanoparticles deposited as centimeter-scale thin films onto a vertical substrate via evaporative assembly. By adjusting the temperature and relative colloid composition under high humidity conditions, we controlled the order of the resultant colloidal crystal films. The domain size of the AB₂ binary crystalline phase increased with an excess of small (B) particles and a very slow evaporation rate below 45 °C, with the best results obtained at 30° and 35 °C.

中文翻译：

二氧化硅纳米颗粒悬浮液垂直蒸发生长的二元胶体晶体膜

尽管在合成二元胶体晶体方面进行了深入的研究，但是在大面积上生产有序的二元胶体晶体膜仍然在合成上具有挑战性。在本文中，我们研究了1-精氨酸稳定的36和22 nm二氧化硅纳米颗粒的二元混合物的相行为，这些纳米颗粒通过蒸发组装以厘米级薄膜的形式沉积在垂直基板上。通过在高湿度条件下调节温度和相对胶体组成，我们控制了所得胶体晶体膜的顺序。AB ₂二元晶相的畴尺寸随着小颗粒（B）的增加和低于45°C的非常慢的蒸发速率而增加，在30°C和35°C时可获得最佳结果。

更新日期：2017-09-19

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