Fabrication of Cubic p-n Heterojunction-Like NiO/In₂O₃ Composite Microparticles and Their Enhanced Gas Sensing Characteristics

Figure 3

FT-IR spectra of (a) In(OH)₃, (b) Ni(OH)₂, (c) Ni(OH)₂/In(OH)₃, and (d) p-NiO/n-In₂O₃.