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http://dx.doi.org/10.3795/KSME-A.2007.31.9.910

Development of the Nanofluidic Filter and Nanopore Micromixer Using Self-Assembly of Nano-Spheres and Surface Tension  

Seo, Young-Ho (강원대학교 기계.메카트로닉스공학부)
Choi, Doo-Sun (한국기계연구원 나노공정장비연구센터)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.31, no.9, 2007 , pp. 910-914 More about this Journal
Abstract
We present a simple and an inexpensive method for the fabrication of a nano-fluidic filter and a nano-pore micromixer using self-assembly of nano-spheres and surface tension. Colloid-plug was formed by surface tension of liquid in a microchannel to fabricate nanofluidic filter. When colloid is evaporated, nano-spheres in a colloid are orderly stacked by a capillary force. Orderly stacked nano-spheres form 3-D nano-mesh which can be used as a mesh structure of a fluidic filter. We used silica nano-sphere whose diameter is $567{\pm}85nm$, and silicon micro-channel of $50{\mu}m$-diameter. Fabricated nano-fluidic filter in a micro-channel has median pore diameter of 158nm which was in agreement with expected diameter of the nano-pore of $128{\pm}19nm$. A nano-pore micromixer consists of $200\;{\mu}m-wide,\;100\;{\mu}m-deep$ micro-channel and self-assembled nano-spheres. In the nano-pore micromixer, two different fluids had no sooner met together than two fluids begin to mix at wide region. From the experimental study, we completely apply self-assembly of nano-spheres to nano-fluidic devices.
Keywords
Nanfluidic Device; Nanopore Microxier; Self-assembly; Nanosphere;
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