Synthesis and Ethanol Sensing Properties of Novel Hierarchical Sn₃O₄ Nanoflowers

Figure 5

Growth mechanism of as-prepared sample; (a) morphology variation in response with operating time and pictures of possible growth mechanism (the red and the green represent the Sn₃O₄ and SnO, resp.) and (b) the Raman curve of samples at different hydrothermal times 6 h, 12 h, 18 h, and 24 h at room temperature.

(a)

(b)