这种点阵制备方法是非常偶然情况下发现的，原来只是利用机-电纺丝工艺直写纤维网格，然后就将直写的纤维网格放到显微镜下观测，由于不小心呼吸时的水汽凝结在纤维网格所沉积的Si衬底上，然后纤维就形成了比较规则的点阵列。后来才有了这篇论文的工作。所以实验过程中遇到的失败或者偶尔现象往往都是非常值得研究的课题。

论文：Controllable self-organization of colloid microarrays based on finite length effects of electrospun ribbons,Soft Matter, 2012,8, 8302-8311

论文地址：http://pubs.rsc.org/en/Content/ArticleLanding/2012/SM/c2sm25535a。

直接下载：

SoftMatter出版.pdf

这部分工作主要是利用机-电纺丝工艺直写出特定的纤维网格，由于网格交点具有锚固作用，可以控制每一段纤维的长度，通过表面张力和Plateau–Rayleigh 不稳定性实现点阵的自组装。本方法可以控制点阵的密度、点的大小、点的间距等。实验结果与已有的理论值吻合的非常好。本方式适合于大规模的点阵制备。

摘要：This paper presents a mechanoelectrospinning (MES)-assisted surface-tension driven self-organization to provide a possible route towards inexpensive generation of large-scale ordered microarrays in a controllable manner. To control the self-organization driven by surface tension and Plateau–Rayleigh instability, finite length effects are utilized to manipulate the self-organizing processes and adjust the competition between nucleation and free surface instability. We introduce fine ribbon-lattices to determine the boundary conditions of ribbons to make use of the finite length effects. The ribbon-lattices are electrodeposited precisely by MES, borrowing ideas from the “Chinese kite”, by involving the mechanical drawing force and the electric field force. Then the samples are transferred to a moisture-rich environment in which the ribbons absorb water vapour and become liquid lines. Surface instability emerges and leads the liquid lines to controllable self-organization. We uncover the controllable area to manipulate the self-organization behavior. A uniform or hierarchical microarray with a specific position, gap and droplet-size can be generated in a continuously tunable manner. This bottom-up method provides a digital approach for the fabrication of large-scale ordered microarrays and micropatterns.

（1）下图是本工艺的原理图——先止血纤维阵列，再移到湿润环境，然后进行自组装，最后进行干燥，形成点阵。

（2）下图是工艺参数对点阵大小的控制规律

（3）下图是线段长度与点间距的关系。