Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA.
Nano Lett. 2010 Sep 8;10(9):3628-32. doi: 10.1021/nl101944e.
The removal of bacteria and other organisms from water is an extremely important process, not only for drinking and sanitation but also industrially as biofouling is a commonplace and serious problem. We here present a textile based multiscale device for the high speed electrical sterilization of water using silver nanowires, carbon nanotubes, and cotton. This approach, which combines several materials spanning three very different length scales with simple dying based fabrication, makes a gravity fed device operating at 100000 L/(h m(2)) which can inactivate >98% of bacteria with only several seconds of total incubation time. This excellent performance is enabled by the use of an electrical mechanism rather than size exclusion, while the very high surface area of the device coupled with large electric field concentrations near the silver nanowire tips allows for effective bacterial inactivation.
从水中去除细菌和其他生物体是一个极其重要的过程，不仅对于饮用水和卫生至关重要，而且在工业上防止生物污垢也是一个常见且严重的问题。我们在此提出了一种基于纺织品的多尺度装置，利用银纳米线、碳纳米管和棉花实现水的高速电灭菌。这种方法结合了几种跨越三个非常不同长度尺度的材料，并采用简单的浸染制造工艺，制造出一种依靠重力驱动的装置，其水流量可达 100000 L/（h·m²），总孵育时间仅需几秒钟即可灭活超过 98%的细菌。这种优异的性能是通过使用电机制而不是尺寸排阻来实现的，而该装置的高表面积与银纳米线尖端附近的大电场浓度相结合，可实现有效的细菌灭活。
