Abstract
We report velocity measurements of compounds inside extended-nano spaces (10 - 10 nm) on a chip using pressure-driven nanofluidic control system. This is the first experimental observation that velocity of compounds differ in nanochannel (near-unity aspect ratio) by hydrodynamic flow. We showed the possibility that pressure-driven separation was efficiently achieved in extended-nano spaces and it open a new pathway for high efficiency separation using nanochannel.