Hydrothermal Synthesis of Hydroxyapatite Assisted by Gemini Cationic Surfactant

Figure 7

SEM images of obtained samples with different concentrations of PCD at 180°C for 10 h: (a, b) the absence of PCD; (c, d) 0.01%; (e, f) 0.05%; (g, h) 0.5%.

(a)

(b)

(c)

(d)

(e)

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(g)

(h)