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Fast, simple and efficient assembly of nanolayered materials and devices

机译：快速，简单和有效地组装纳米层材料和设备

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摘要

A new method of 'directed' self-assembly is demonstrated that has the potential to simply and quickly build nanostructured materials and devices. Called spin-spray layer-by-layer self-assembly (SSLbL), it is a modification of the well-known layer-by-layer method (LbL). Using SSLbL, it is possible to create and stack nanometre-thick, uniform layers containing a wide variety of different polymers, nanoparticles, or colloids in less than 25 s per bilayer, orders of magnitude faster than traditional LbL. This is done by modifying traditional dipping LbL to a system where carefully chosen volumes of polymer or colloidal solutions are sprayed directly on a rotating substrate. SSLbL is also much less wasteful of valuable nanoparticles and polymers than LbL. It is shown that in contrast to less than 1% material usage found in LbL, SSLbL has material usage efficiency up to 50%, and this can be further improved. Another direct result of the spin-spray modification is simple control of the in-plane structure of nanolayered films using masks, which is demonstrated. Such capability opens up the possibility of simply and inexpensively building complete nanocomposite devices with both vertical and lateral organization.
机译：演示了一种“定向”自组装的新方法，该方法具有简单，快速地构建纳米结构材料和器件的潜力。称为自旋喷涂逐层自组装（SSLbL），它是对众所周知的逐层方法（LbL）的修改。使用SSLbL，可以在每双层少于25 s的时间内创建并堆叠纳米级，均匀的层，其中包含多种不同的聚合物，纳米颗粒或胶体，比传统的LbL快几个数量级。这可以通过将传统的浸入式LbL修改为系统来完成，在该系统中，将精心选择的体积的聚合物或胶体溶液直接喷涂在旋转的基材上。与LbL相比，SSLbL浪费了宝贵的纳米颗粒和聚合物。结果表明，与LbL中的材料使用率不到1％相比，SSLbL的材料使用效率高达50％，并且可以进一步提高。自旋喷涂改性的另一个直接结果是使用掩模简单地控制了纳米层薄膜的面内结构。这种能力开辟了简单而廉价地构建具有垂直和横向组织的完整纳米复合装置的可能性。

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