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Uchino, Takashi*; Aboshi, Atsuko*; Yamada, Tomoko*; Inamura, Yasuhiro; Katayama, Yoshinori
Physical Review B, 77(13), p.132201_1 - 132201_4, 2008/04
Times Cited Count:8 Percentile:37.23(Materials Science, Multidisciplinary)X-ray diffraction study of nanometer-size amorphous silica particles was carried out at pressures up to 7.4 GPa. An energy dispersive synchrotron radiation technique was used. It was found that silica nanoparticles exhibit pressure-induced structural changes, which eventually lead to a permanent densification. The transformation occurs at much lower pressures than what occurs in a bulk silica glass. A new window for amorphous-amorphous transformation at room temperature is provided by decreasing the size.