Gravity-Assisted Convective Assembly of Centimeter-Sized Uniform Two-Dimensional Colloidal Crystals
Gravity-Assisted Convective Assembly of Centimeter-Sized Uniform Two-Dimensional Colloidal Crystals
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DOI：
10.1021/la3040227
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发表时间：
2013-02-12
期刊：
影响因子：
3.9
通讯作者：
Xu, Huanhuan
中科院分区：
文献类型：
--
作者：
Ye, Ran;Ye, Yong-Hong;Xu, Huanhuan
我们开发了一种廉价、健壮、易于控制的方法--重力辅助对流自组装方法，来制备厘米级尺寸的均匀二维胶体晶体。当悬浮液浓度在0.32-2.5wt%范围内时，可以形成厘米级的二维胶体晶体。一旦有序过程开始，当环境温度从3℃逐渐升高到10℃时，二维胶体晶体的形成不受影响。实验结果表明，在这种方法中，重力在胶体晶体的形成中起着重要的作用。胶体颗粒被输送到悬浮玻璃界面的边缘，额外的颗粒最终可以在重力的作用下移动到滑道的边缘。
We have developed an inexpensive, robust, and easily controlled method, a gravity-assisted convective self-assembly method, to fabricate centimeter-sized uniform two-dimensional colloidal crystals. In this method, centimeter-sized two-dimensional colloidal crystals can be formed when the suspension concentration is in the range of 0.32-2.5 wt %. Once the ordering process starts, the formation of two-dimensional colloidal crystals is not affected when the environmental temperature gradually increases from 3 to 10 degrees C. Experimental results indicate that, in this method, gravity plays an important role in the colloidal crystal formation. The colloidal particles are transported to the edge of the suspension glass interface, and the extra particles can be eventually moved to the edge of the slide by gravity.