119th General Meeting of the KCS

Type Poster Presentation
Area 무기화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code INOR.P-49
Subject Bioinspired Silicification on the Nanostructured Surface by Local Liquid Phase Deposition
Authors 박이슬, 김규리, 이진석*
숙명여자대학교 화학과, Korea
Abstract Organisms can biosynthesize hierarchically patterned three-dimensional (3D) biominerals, called as biomineralization, such as calcium carbonate, calcium phosphate, and silica. The structural hierarchy in biominerals attributes strengths and stiffness, leading to protect themselves from natural environment. Especially, the process for production of silica into the living organism is known as biosilcification, which are often discovered in the diatom. Diatoms are complex and elaborated nano- and microstructured materials, whose architectures have numerous nanoscale pores with high porosity and high mechanical stability. In this work, we explored the silicification on the arranged nanoscale-scaffold surface with porous structures, to mimic 3D hierarchical structures of diatoms by local liquid phase deposition. The energy and local concentration of silicic acid on the nanostructured surface are different; therefore, it is important to investigate the liquid phase deposition on the nanostructure with diverse conditions to mimic and understand the mechanism of bioinspired morphogenesis. The different amount of water in LPD solution and reaction temperatures were used to investigate the effect of diverse environment because the biosilicification of diatoms occurs in the various surrounding environment such as concentration, temperature, and pressures. In addition, the silicification on the nanostructured surface deposited at the pinholes among the beads due to local high concentration. Furthermore, the pore arrangement and directions with 3D hierarchical structures were realized by patterned silica bead arrays and binary monolayers of different sized beads with varying the LPD conditions.
E-mail guri20721@hanmail.net