Nanomesh fluidic filter using self-assembly of colloidal nanospheres and surface tension

초록

A simple and inexpensive method of fabricating a nanofluidic filter was developed by using self-assembly of colloidal nanospheres and surface tension. Colloid plug formed by surface tension in the microchannel was evaporated, then the nanospheres in a colloid were orderly stacked by capillary force. The porosity and mean pore size of the nanomesh membrane were 45.4% and 158 nm, respectively. In the nanoindentation test with a spherical tip of 10 mu m radius, the nanomesh membranes withstood the maximum mechanical loading of 26.8 +/- 2.47 mN, and the heat-treated membranes withstood 66.65 +/- 4.15 mN. (c) 2007 American Institute of Physics.

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