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The comparison of relative RI change rates from calculation of the dynamic responses of SiO2/LSPR sensing probe to HF solutions in different concentrations (0.25%, 0.5%, 1.0%, 2.0%, 3.0% and 4.0%). The formation of SiO2 bulk of 4.5 mm in diameter with R = 10, pH = 4, after standing for 3 days.
