Sol–Gel Synthesis of Nanostructured Mesoporous Silica Powder and Thin Films

Figure 4

The possible interaction mechanisms between the inorganic species, the head group of the surfactants, and the mediating ion, under (a) acidic reaction condition, S⁺I⁻ synthesis pathway, (b) basic reaction condition, S⁻I⁺ synthesis pathway, (c) in the presence of M⁻ mediating ion, S⁺M⁻I⁺ synthesis pathway, (d) M⁺ mediating ion, S⁻M⁺I⁻ synthesis pathway, and at pH equal to PZC of silica reaction conditions, (e) S⁰I⁰ synthesis pathway, or (f) S⁰(MI)⁰ where a mediating ion (M) is used, reproduced from [30] with permission from John Wiley & Sons, Inc.

(a)

(b)

(c)

(d)

(e)

(f)