Formation of Aligned Microfiber Arrays via Self-Assembling SiO2 Nanocolloids. Change of Microfiber Structure during Annealing
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- 作者：Valery Shklover
- 刊名：Chemistry of Materials
- 出版年：2005
- 出版时间：February 8, 2005
- 年：2005
- 卷：17
- 期：3
- 页码：608 - 614
- 全文大小：393K
- 年卷期：v.17,no.3(February 8, 2005)
- ISSN：1520-5002
文摘
Self-assembling spherical colloidal SiO2 nanoparticles using shear flow leads to the formation of thefilms, consisting of aligned one-layer microfibers. The termination of fabricated microfibers and filmscan be described in terms of crystallographic faces of corresponding close-packed structures, which inturn are preset by the kinetic conditions of crystallization. An in-situ X-ray study of the transformationof the nanocrystalline microfibers at high-temperature into a mixture of silica polymorphs with the high-temperature 
-cristobalite and tridimite as major components is performed. Microfibers heated in themiddle temperature zone exhibit graded morphology, with the degree of coalescence of amorphousnanoparticles changing along the microfiber length. The performed study can be considered as a part ofthe development of a strategy (which could require both self-assembly and template-assisted steps) towarda bottom-up approach to the design of nanostructure arrays for technological applications.
-cristobalite and tridimite as major components is performed. Microfibers heated in themiddle temperature zone exhibit graded morphology, with the degree of coalescence of amorphousnanoparticles changing along the microfiber length. The performed study can be considered as a part ofthe development of a strategy (which could require both self-assembly and template-assisted steps) towarda bottom-up approach to the design of nanostructure arrays for technological applications.