Figure 3.

The procedure of the hydrothermal treatment (HTT). An aluminum tube (ca. 20 mm in diameter and 150 mm long) was first filled with pure water of 2 mL. The LB sample was put in the tube using a spacer to prevent direct contact of the sample with the water. Finally, the tube was closed by a screw lid using a Teflon tape and immersed in a water bath kept at 80°C.

Miura et al. Nanoscale Research Letters 2013 8:429   doi:10.1186/1556-276X-8-429
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