. 2021 Nov 3;6(45):30281–30291. doi: 10.1021/acsomega.1c02222

Table 1. Selectivity of ISFETs Measured in the Individual Salt Solution^a.

graphene support
	No Membrane
	S_{V_Dirac}^{Ca²⁺/Na⁺}	S_{g_m}^{Ca²⁺/Na⁺}	S_{V_Dirac}^Ca²⁺/K⁺	S_{g_m}^Ca²⁺/K⁺
SiO₂	0.33	0.13	0.35	0.21
hBN	0.53	0.23	0.56	0.35
	Ca²⁺ Selective Membrane
	S_{V_Dirac}^{Ca²⁺/Na⁺}	S_{g_m}^{Ca²⁺/Na⁺}	S_{V_Dirac}^Ca²⁺/K⁺	S_{g_m}^Ca²⁺/K⁺
SiO₂	1.33	98.9	1.48	196
hBN	2.15	665	2.37	2070
	K⁺ Selective Membrane
	S_{V_Dirac}^K⁺/Ca²⁺	S_{g_m}^K⁺/Ca²⁺	S_{V_Dirac}^K⁺/Na⁺	S_{g_m}^K⁺/Na⁺
SiO₂	11.1	100	2.65	9.83
hBN	11.3	144	2.33	3.80
	Na⁺ Selective Membrane
	S_{V_Dirac}^{Na⁺/Ca²⁺}	S_{g_m}^{Na⁺/Ca²⁺}	S_{V_Dirac}^Na⁺/K⁺	S_{g_m}^Na⁺/K⁺
SiO₂	15	80.8	2.87	9.21
hBN	14.5	137	2.62	7.66

S_{V_Dirac}^{Ca²⁺/Na⁺} denotes selectivity of detecting Ca²⁺ over Na⁺ with sensitivity measured in terms of the shift in V_Dirac. Values rounded to first three accurate digits.

Table 1. Selectivity of ISFETs Measured in the Individual Salt Solutiona.

Table 1. Selectivity of ISFETs Measured in the Individual Salt Solution^a.