Self-Assembly of Meso- and Nanoparticles into 3d Ordered Arrays and its Applications
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EXPERIMENT Figure IA shows the schematic procedure that we have used for the assembly of colloidal particles.[5] A packing cell was formed with a square frame of photoresist sandwiched between two glass substrates and held together with binder clips. The photoresist film (Microposit 1075, Shipley, MA) of -12-gm thickness (H) was spin-coated onto the bottom substrate and then exposed to UV light for -85 s through a photomask of the square frame. A second UV exposure for -8 s through a mask of parallel lines (100 gm in width and separated by 100 jim) defined the channels on one of the sides of the square frame. As a result, an array of parallel channels (h
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