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A triblock copolymer template and an organosiloxane or organic additive facilitated the first synthesis of large-pore (up to 9.5 nm) three-dimensional bicontinuous mesoporous silica with Ia3d-type symmetry at room temperature in acidic medium. The picture is a transmission electron micrograph showing the pores along [111] and the corresponding diffractogram (inset).
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Li et al. (2002) studied this question.
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