GCE

v (V×s⁻¹)

I_p (μA)

I_p ~ v

Q (μC)

n

n_av

Bare

0.01

−6.84

I_p = −130.31v − 6.2297

R² = 0.9902

−35.32

1.99

2.05

0.02

−9.35

−23.55

2.04

0.05

−13.14

−12.98

2.08

0.08

−16.73

−11.02

1.95

0.1

−18.97

−8.94

2.18

COOH-NMPs

0.01

−26.85

I_p = −130.43v − 25.764

R² = 0.9889

−124.27

2.22

2.08

0.02

−28.28

−71.92

2.02

0.05

−33.08

−34.33

1.98

0.08

−35.56

−21.54

2.12

0.1

−38.96

−19.43

2.06

DNA-COOH-NMPs

0.01

−8.84

I_p = −130.99v − 7.7944

R² = 0.9901

−46.34

1.96

2.02

0.02

−10.35

−25.08

2.12

0.05

−15.14

−15.18

2.05

0.08

−17.73

−11.86

1.92

0.1

−20.97

−10.56

2.04