“…24 It exists in either a cubic bixbyite-type IJc-In 2 O 3 ) phase (E g : 2.93 ± 0.15 eV) or a rh-In 2 O 3 phase (E g : 3.02 ± 0.15 eV). 25 For c-In 2 O 3 , various morphologies of c-In 2 O 3 nanostructures have been obtained using several approaches, including physical evaporation technique, 26 chemical vapor deposition, 27 thermal oxidation, 28 laser ablation technique, 29 sol-gel method, 30 and solution-phase growth. 31 However, compared with c-In 2 O 3 , a few studies on rh-In 2 O 3 nanostructures had been reported because the synthesis of rh-In 2 O 3 needed some extreme reaction conditions, such as high pressure or high temperature.…”