. Author manuscript; available in PMC: 2011 Mar 18.

Published in final edited form as: J Phys Chem C Nanomater Interfaces. 2010 Mar 18;114(10):4459–4465. doi: 10.1021/jp9085359

Table 1.

Initial adsorption rates (v_i), saturation adsorbed amounts (Γ_sat) and desorbed percentages of 8 μg mL^-1 polyT₂₀ at two ionic strength (IS). The standard deviation is given by independent measurements.

		Si/SiO₂/CNT			Si/SiO₂

IS	PB	v_i μg m^-2 s^-1	Γ_sat μg m^-2	Desorbed %	v_i μg m^-2 s^-1	Γ_sat μg m^-2	Desorbed %
0.11	+ 100 mM [Na⁺]	1.6 ± 0.4	50 ± 10	30	X	X	X
	+ 100 mM [Na⁺]	1.8 ± 0.5	60 ± 15	10	X	X	X
	+10 mM [Mg²⁺]	1.8 ± 0.5	60 ± 15	10	X	X	X
	+ 33 mM [Mg²⁺]	4 ± 1	230 ± 60	15	1.3 ± 0.3	70 ± 20	40

0.22	+ 230 mM [Na⁺]	6 ± 2	210 ± 50	30	7 ± 2	170 ± 40	35
	+ 100 mM [Na⁺]	2.3 ± 0.6	90 ± 20	15	1.7 ± 0.4	120 ± 30	10
	+ 43 mM [Mg²⁺]	2.3 ± 0.6	90 ± 20	15	1.7 ± 0.4	120 ± 30	10