Figure 2.

FE-SEM images of TiO2 nanoparticles and TNT films. (a) TiO2 nanoparticles made by the sol-gel method and (b) TNT films made by the hydrothermal method at 150°C for 12 h.

Lee et al. Nanoscale Research Letters 2012 7:48   doi:10.1186/1556-276X-7-48
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