Fig. 5

Representative TEM images and data of the nanoquartz. a microemulsion-synthesized nanoquartz; b, c 2-day hydrothermal product; d, e 5-day hydrothermal product; f, g 6-day hydrothermal product; h, i 7-day hydrothermal product; j histogram showing the particle size for microemulsion-synthesized nanoquartz obtained from HREM micrographs by sizing 550 particles; k histogram showing the particle size for the 7-day hydrothermal product obtained from HREM micrographs by sizing 461 particles. The scale bars are 50 nm in a and b; 5 nm in c, e, g, and i; 100 nm in d, f, and h and 2 nm⁻¹ in the insets to a and b. The insets to a and b show the electron diffraction pattern from the circled regions. The diffraction ring in a corresponds to 0.2 nm, consistent with the electron diffraction patterns shown in Fig. 1. The diffraction pattern in b has a ring pattern commensurate with quartz and inner hexagonal diffraction spots that index as (003) on a doubled quartz cell, consistent with a slightly perturbed quartz structure