3D Long-range ordering in ein SiO2 submicrometer-sphere sintered superstructure


  • This work was partially financed by the CICyT under Contract MAT94-0727 and the EU the under Human Capital and Mobility Program.


Three-dimensional arrays of SiO2 nanometer particles lead to Bragg diffraction effects of visible light—as seen for natural opals, see also this issue's cover—and applications such as photonic bandgap materials. Teh fabrication of the opalline structures is described and details are given of how to obtain ordered compacts. The Figure shows a fracture surface of a sintered sample comprising 390 nm-diameter silica spheres.

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