Figure 1. XPS wide-scan spectra of un-decontaminated SiO2 in (a), SiO2 boiled in 0.01 (b), 0.05 (c), 5 (d), and 10% (e) sodium peroxodisulfate solutions for 15 min, followed by ultrasonic rinsing with acetone for 30 min.
Figure 1. XPS wide-scan spectra of un-decontaminated SiO2 in (a), SiO2 boiled in 0.01 (b), 0.05 (c), 5 (d), and 10% (e) sodium peroxodisulfate solutions for 15 min, followed by ultrasonic rinsing with acetone for 30 min.