“…[16][17][18][19][20] So far, articially prepared TT and other smart semiconductors have been reported to show a variety of morphologies such as nanowires, nanotubes, nanoakes, nanospheres, nanosheets, coral-like nanostructures, etc. 16,[21][22][23][24][25] Their main preparation methods include the hydrothermal method, 14,21 solvothermal method, 26,27 template-assisted method, 24 etc. However, these methods have the disadvantages of long cycles, complicated processes, high temperatures, and high pressures, which make the preparation cost extremely high.…”