| 실리카 콜로이드 나노입자를 이용한 반사 방지막의 제조 |
| 황연 |
| 서울산업대학교 신소재공학과 |
| High-Transmittance Films Coated from Silica Colloidal Nano-Particles |
| Yeon Hwang |
| Department of Materials Science and Engineering, Seoul National University of Technology |
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| ABSTRACT |
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High-transmittance film was coated by using spherical silica nano colloids. Silica colloid sol was preservred between two inclined slide glasses by capillary force, and particles were stacked to form a film onto the substrate as the upper glass was sliding. As the sliding speed increased, the thickness of the film decreased and light transmittance varied. The microstructure observed by SEM showed that silica particles were nearly close packed, which enabled the calculation of the effective refractive index of the film. The film thickness calculated from the wavelength of maximum transmittance and the effective refractive index was well coincided with the thickness observed by SEM and measured by profiler. The maximum transmittance of $94.7%$ was obtained. This means that $97.4%$ of transmittance or $1.3%$ of reflectance can be achieved by simple process if both sides of the substrate are coated. |
| Key words:
High-transmittance film, Silica nano-celloid, Particle coating |
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