Figure 2.

Effect of GO with different sizes on the first- and second-round PCRs.

Notes: M: DNA marker. (A) S-GO in the first-round PCR. (B) L-GO in the first-round PCR. (C) PCR band intensity at different concentrations of GO in the first-round PCR. (D) S-GO in the second-round PCR. (E) L-GO in the second-round PCR. (F) PCR band intensity at different concentrations of GO in the second-round PCR. The GO concentration in lanes 1–7 is 0 μg mL⁻¹, 0.8 μg mL⁻¹, 1.6 μg mL⁻¹, 3.2 μg mL⁻¹, 4.8 μg mL⁻¹, 6.4 μg mL⁻¹ and 8.0 μg mL⁻¹, respectively.

Abbreviations: GOs, graphene oxides; L-GO, large GO; PCRs, polymerase chain reactions; S-GO, small GO.