Rationally Designed Complex, Hierarchical Microarchitectures
Rationally Designed Complex, Hierarchical Microarchitectures
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DOI：
10.1126/science.1234621
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发表时间：
2013-05-17
期刊：
影响因子：
56.9
通讯作者：
Aizenberg, Joanna
中科院分区：
文献类型：
--
作者：
Noorduin, Wim L.;Grinthal, Alison;Aizenberg, Joanna
复杂的纳米和微观结构的出现是根本的兴趣，并且对其形式进行编程的能力在光学，催化和电子学等领域具有实际的影响。我们开发了碳酸盐-二氧化硅微结构中的动态反应扩散系统，使我们能够合理地设计方案，通过在氯化钡和偏硅酸钠的溶液中扩散二氧化碳（CO2）来精确地雕刻各种各样的基本形状。我们确定了两种不同的生长模式，并展示了如何在CO2浓度，pH值和温度的连续和离散调制可以用来确定性地在不同的制度之间切换，并创建一束层次组装的多尺度微观结构，具有前所未有的复杂性和精度。这些结果概述了一个纳米技术的战略“合作”与自组装过程在真实的时间建立任意的构造架构。
The emergence of complex nano- and microstructures is of fundamental interest, and the ability to program their form has practical ramifications in fields such as optics, catalysis, and electronics. We developed carbonate-silica microstructures in a dynamic reaction-diffusion system that allow us to rationally devise schemes for precisely sculpting a great variety of elementary shapes by diffusion of carbon dioxide (CO2) in a solution of barium chloride and sodium metasilicate. We identify two distinct growth modes and show how continuous and discrete modulations in CO2 concentration, pH, and temperature can be used to deterministically switch between different regimes and create a bouquet of hierarchically assembled multiscale microstructures with unprecedented levels of complexity and precision. These results outline a nanotechnology strategy for "collaborating" with self-assembly processes in real time to build arbitrary tectonic architectures.