| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.291 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | Diffraction Color Induced by Self-Ordering of Silica Particles |
| 초록 | Uniformly sized silica particles were prepared by low-temperature sol-gel process with tetraethyl orthosilicate (TEOS). The size of silica particle was controlled by changing concentration of TEOS and time of sol-gel reaction (Figure 1). Ordered arrays were fabricated with these size-controlled particles by solvent evaporation method (Figure 2)1. These arrays can transmit a light of specific wavelength related to particle size2. We can confirm this wavelength using UV transmission spectroscopy. The minimum transmission in UV spectrum was blue-shifted by decrease in particle size, which can be explained with Bragg’s diffraction. Figure 1. SEM photographs of (a) 490 nm-sized and (b) 560 nm-sized silica particles. Figure 2. SEM photographs of ordered arrays of (a) 490 nm-sized and (b) 560 nm-sized silica particles. Reference 1. A. S. Dimitrov and K. Nagayama, Langmuir, 12, 1303 (1996). 2. J. H. Moon, G. R. Yi, S. M. Yang, D. J. Pine and S. B. Park, Adv. Mater., 16, 605 (2004). |
| 저자 | 김태현, 박원호, 이택승 |
| 소속 | 충남대 |
| 키워드 | silica particle; self-assembly; TEOS |
