Single Crystal and Morphologies of Mesoporous Silicas

1 Single Crystal and Morphologies of Mesoporous Silicas Single Crystal  

The mesoscaled structural regularity causes various features that are observed for mesoporous materials, such as crystal-like particle morphologies and the existence of sharp XRD peaks. Although no atomic-scaled structural ordering is observed in the mesoporous crystal , these particles can be described as being artificial single-crystalline with a mesoscopic periodic structure. 

Highly ordered pure-silicaMCM-41 materials possessing well defined morphology (up to 2 pm) have been successfully prepared with extremely low surfactant concentration at room temperature. Experimental results suggested that highly ordered MCM-41 material was formed by a deposition mechanism with silicate rod-like micelles.[110] 

Kim and Ryoo[268] synthesized truncated rhombic dodecahedral crystals of MCM-48 by a hydrothermal procedure using sodium silicate, CTAB, and various kinds of alcohol. 

Zhao[269] reported a morphological control approach using block copolymers, co-surfactants, co-solvents, or the additive of strong electrolytes to selectively form 

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