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首页> 外文期刊>Advanced Functional Materials >Dynamic Agitation-Induced Centrifugal Purification of Nanowires Enabling Transparent Electrodes with 99.2% Transmittance
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Dynamic Agitation-Induced Centrifugal Purification of Nanowires Enabling Transparent Electrodes with 99.2% Transmittance

机译：动态搅拌诱导纳米线的离心纯化，使透明电极的透射率达到99.2％

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摘要

To promote silver nanowire (AgNW) as a viable commercial alternative for transparent electrodes, it is necessary to further develop industrially scalable, high-performance yielding and cost-efficient methods of purifying large quantities of as-prepared AgNW suspensions. In this work, a facile, effective, and mass scalable purification method that employs a novel dynamic agitation-induced centrifugal filtration concept to obtain highly purified and printable AgNW solutions. This unique dynamic filtration system, which amalgamates the advantages of membrane filtration, centrifugal filtration and "cross-flow" filtration, is effective at (1) removing nanoparticles, short nanorods and organic additives from as-prepared AgNW suspensions without producing aggregation; (2) concentrating purified AgNW suspensions to a desirable concentration; and (3) formulating printable AgNW suspensions with suitable solvents. The resulting purified, polyol-method synthesized AgNW with a modest aspect ratio of approximate to 1000 and narrowed length distribution, can be coated into flexible transparent electrodes to yield a transmittance of 99.2% and 95.2% at 230 and 29.6 ohm sq(-1) respectively. These performance metrics are comparable or exceed that of most transparent electrodes made from AgNW with larger aspect ratio (2000) but purified through conventional purification methods. To maximize the dynamic purification efficiency, a model is also developed to describe and predict this dynamic filtration process.
机译：为了促进将银纳米线（AgNW）用作透明电极的可行的商业替代品，有必要进一步开发工业规模，高性能，高成本效益的方法，以纯化大量已制备的AgNW悬浮液。在这项工作中，一种简便，有效且可大规模升级的纯化方法，该方法采用新型动态搅拌诱导的离心过滤概念来获得高度纯化且可打印的AgNW溶液。这种独特的动态过滤系统融合了膜过滤，离心过滤和“错流”过滤的优势，可有效地（1）从制备的AgNW悬浮液中去除纳米颗粒，短纳米棒和有机添加剂，而不会产生聚集； （2）将纯化的AgNW悬浮液浓缩至所需浓度； （3）用合适的溶剂配制可印刷的AgNW悬浮液。所得的纯化的，多元醇法合成的AgNW具有大约1000的中等长宽比和狭窄的长度分布，可以涂覆到柔性透明电极中，以在230和29.6 ohm sq（-1）处产生99.2％和95.2％的透射率分别。这些性能指标与具有较大纵横比（> 2000）但通过常规纯化方法纯化的大多数由AgNW制成的透明电极可比或超过。为了最大化动态纯化效率，还开发了一个模型来描述和预测此动态过滤过程。

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