In Situ Visualization of Layer Transitions during Convective Self-Assembly in a Sessile Drop
Convective self-assembly of colloidal spheres provides a simple method for fabricating two and three dimensional colloidal crystals. In this work, we investigated the layer transitions phenomena during colloidal self-assembly in a sessile drop by using an in-situ videoscopic set-up. The effects of surface charge, colloidal concentration, and surfactant additions were examined. The results show that the chemical environment plays an important role in colloidal self-assembly. In the case of ordered growth, different layer transition phenomena were observed when the colloidal concentration is different.
S. J. CHUA, J. H. TENG, O. WADA, R. DE LA RUE and X. H. TANG
L. Gao et al., "In Situ Visualization of Layer Transitions during Convective Self-Assembly in a Sessile Drop", Advanced Materials Research, Vol. 31, pp. 117-119, 2008