Abstract
Sol-gel thin films prepared by dipping coating technique, sol–gel derived bulk were prepared from constant water (H2O)/tetraethyl-orthosilicate (TEOS) ratio, dipping coating were carried out at different dipping speed 100mm/min, 200mm/min, 300mm/min, 400mm/min, 500mm/min respectively. The films are characterized by ellipsometer and SEM respectively. The experimental results show the thickness of films are become bigger and bigger with the dipping speed increasing.The refractive index change is not obvious.
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