Controlled Molecular Assembly via Dynamic Confinement of Solvent
Controlled Molecular Assembly via Dynamic Confinement of Solvent
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通过溶剂的动态限制控制分子组装
DOI：
10.1021/acs.jpclett.8b02442
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Sly, Joseph
中科院分区：
文献类型：
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作者：
Zhang, Jiali;Piunova, Victoria A.;Liu, Yang;Tek, Andy;Yang, Qingbo;Frommer, Jane;Liu, Gang-yu;Sly, Joseph
超小液滴的组装遵循与较大规模不同的动力学。使用原子力显微镜中独立控制的微流控探针，含有聚合物的亚飞升水滴可以产生尺寸小至数十纳米的清晰特征。由于小液滴的超快蒸发速率和空间限制，液滴的初始形状和液滴内的溶质浓度对聚合物的最终组装起着重要的作用。这些效应被用来控制最终的分子组装，根据特征几何和特征内单个分子的分布和堆积。这项工作引入了控制分子组装的新方法，使我们更接近化学和材料科学的可编程合成。结果为添加剂制造中的三维(3D)纳米打印铺平了道路。
Assembly from ultrasmall solution droplets follows a different dynamic from that of larger scales. Using an independently controlled microfluidic probe in an atomic force microscope, subfemtoliter aqueous droplets containing polymers produce well-defined features with dimensions as small as tens of nanometers. The initial shape of the droplet and the concentration of solute within the droplet play significant roles in the final assembly of polymers due to the ultrafast evaporation rate and spatial confinement by the small droplets. These effects are used to control the final molecular assembly in terms of feature geometry and distribution and packing of individual molecules within the features. This work introduces new means of control over molecular assembly, bringing us closer to programmable synthesis for chemistry and materials science. The outcomes pave the way for three-dimensional (3D) nanoprinting in additive manufacturing.