Figure 3.

Color changes and spectral patterns. (a) The sequence of concentration-dependent changes in color of TiO2-DZ nanosensor after the detection of Bi(III) ions at different concentrations. (b) Spectral patterns obtained with DZ in the absence (blank) and in the presence of 0.5 ppm Bi(III) ions after 1-min reaction time at pH 4.

Faisal et al. Nanoscale Research Letters 2014 9:62   doi:10.1186/1556-276X-9-62
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