Sol-Gel Thin Films Immobilized with Bromocresol Purple pH-Sensitive Indicator in Presence of Surfactants

Figure 2

Absorption spectra of immobilized BCP/SDS at different concentrations of BCP: (a) 0.00001 M, (b) 0.0001 M, (c) 0.001 M (d) 0.01 M, and (e) 0.05 M.