High-quality, hexagonal phase, mesoporous silica fibers (see Figure) can be grown by the general procedure for one-step, two-phase, room temperature synthesis reported here. The silica fibers, which are 1–5 μm in diameter and up to 5 cm long, have excellent long-range order, a narrow pore size distribution, and a pore volume of up to 0.78 cm3/g. The birefringent fibers can be used as high-surface-area optical fibers.
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