Ice Fishing Micro channels with sub-micron pores

We report here a micro fluidic device with a controlled opening, which is used for accessing the fluid inside the micro channel from outside. The control of the reduced diameter of the opening pore is achieved by depositing a controlled Parylene layer on a starting lager opening hole. By changing the Parylene type and thickness, we can control the pore size and surface hydrophobicity. Due to the Laplace-Young's pressure induced by the surface tension of the liquid in the vicinity of the pore, the internal fluid can be pressurized without leaking through the pore.