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Synthesis and Characterization of Silica Nanotubes with Radially Oriented Mesopores

등록일
2008년 2월 18일 15시 23분 12초
접수번호
1446
발표코드
27P26포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 <발표Ⅱ>
발표형식
포스터
발표분야
공업화학
저자 및
공동저자
Yatao Yu, Huibin Qiu, Xiaowei Wu, Huachun Li, Yongsheng Li, Yasuhiro Sakamoto, Yoshihisa Inoue, Kazutami Sakamoto, Osamu Terasaki, Shunai Che
Department of Chemistry, School of Chemistry and Chemical Technology,Shanghai Jiao Tong University,
Hierarchical silica nanotubes with radially oriented mesoporous channels perpendicular to the central axis of the tube were synthesized by using self-assembled chiral anionic surfactant, co-structure directing agent (CSDA) and silica precursor. The average inner diameter and the wall thickness were ~94, ~62 and ~62 nm and to ~27, ~33 and ~45 nm, respectively, by manipulating the synthesis gel composition, while the diameter of the wall mesopores was kept constant at ~4 nm. These materials with such a unique structure were produced only with chiral surfactant and achiral or racemic surfactant did not give rise to mesoporous silica nanotubes. The existence of helicity in the lipid bilayer template was confirmed by means of circular dichroism spectroscopy. The mesoporous penetrating from outside to inside of silica nanotubes are thought to originate from the initial formation of self-assembled lipid tubes with helical bilayers, which in turn re-assemble to form the mesopores in the wall of the nanotubes upon addition of co-structure directing agent and silica source.

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