A bicontinuous cubic structure was revealed by electron crystallography on a large-pore mesoporous silica with a cubic Iad symmetry synthesized by using a triblock copolymer as a structure-directing agent. Its reconstructed structure (picture, left) is composed of an enantiomeric pair of interwoven three-dimensional mesoporous networks. Ordered complementary pores form interconnections between the two main channel systems at a special flat point of the G-surface (right).
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Sakamoto et al. (2004) studied this question.
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