Table 2.

Summary of nanopore parameters and translocation statistics extracted from data from all thirteen a-Si/SiO_x nanopores measured at room temperature with filtering at 2 MHz using an “8-sigma threshold” to define events. d_TEM is measured from TEM images as illustrated in Figure 1f. t_EELS is the thickness measured from the EELS spectrum. d_eff and t_eff are the effective diameters and thicknesses calculated using a simple cylindrical model for nanopore conductance (Eq. 1 and Eq. 2). τ_dwell are the characteristic dwell times for ssDNA molecules obtained by fitting the event time histograms by an exponential function, and rates are the characteristic dwell times divided by the number of nucleotides. For the 13 pores we presented here, the baseline current increased within 10% of the starting open-pore current within a 10-minute time interval. *Note that for Pore D, the calculated t_eff is negative, and we set t_eff to be 0 to obtain an approximate d_eff value.

Pore	dTEM (nm)	deff (nm)	tEELS (nm)	teff (nm)	Voltage (mV)	KCl (M)	τdwell (μs)	IBASELINE (nA)	< ΔI > (nA)	$\frac{<\Delta I>}{I_{BASELINE}}$	< G > (nS)	< ΔG > (nS)	ssDNA (nts)	rate (ns/nt)
A	0.9	1.5	3	8.9	900	3	1.2	4.8	3.0	0.62	5.4	3.3	200	5.8
B	1.2	1.5	3	3.6	900	3	3.0	10.6	6.1	0.58	11.7	6.8	200	14.8
C	1.6 × 2	1.4	3	0.5	500	3	0.8	14.8	8.5	0.58	29.6	17.0	200	4.2
D	1.8 × 2.4	1.4*	3	0*	400	3	0.5	18.1	9.0	0.50	45.2	22.5	200	2.3
E	1.8	1.7	3	3.3	900	3	1.0	13.1	6.2	0.47	14.6	6.9	80	13.1
F	1.8	1.7	3	2.6	900	3	2.0	15.8	7.1	0.45	17.6	7.9	200	10.0
G	1.6	1.9	3	4.2	900	3	1.5	13.4	5.6	0.43	14.8	6.2	90	16.3
H	1.7	1.7	3	2.1	900	3	1.1	19.0	7.9	0.42	21.1	8.8	200	5.4
I	1.8	1.7	5	0.9	900	1	1.4	10.8	4.1	0.38	12.0	4.6	90	15.6
J	1.2 × 1.7	2.0	8	2.3	700	3	0.8	17.1	5.3	0.31	24.4	7.6	90	9.1
K	1.7	2.0	8	1.9	700	3	0.5	19.0	5.8	0.31	27.1	8.3	90	5.3
L	1.6	2.1	3	2.3	900	1	0.7	9.2	2.6	0.28	10.2	2.8	90	7.9
M	1.4 × 2.2	1.7	5	1.5	900	1	1.9	8.7	3.5	0.27	9.6	3.9	90	20.9