Journal
CHEMISTRY OF MATERIALS
Volume 15, Issue 9, Pages 1797-1802Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm021793m
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When a glass substrate is dipped into a colloidal suspension, the contact line shape is changed with the angle of tilt. These variations in the contact line shape indicate a possibility for thickness control of colloidal crystals. Thus, we have investigated how the thickness of colloidal crystals is changed with specific tilted angles (-10degrees, 0degrees, 10degrees, 20degrees, and 30degrees, respectively). As a glass substrate is tilted more (from -10degrees to 30degrees), a smoother and thicker contact line is formed and thicker colloidal crystals are obtained. In addition, it is possible to explain why multiple contact line patterns are formed on the glass substrate. It was found that to fabricate three-dimensional colloidal crystals with an even surface, the evaporation rate of water should be reduced and/or the glass substrate should be tilted over 10degrees in our cases.
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