Table 2.

Permeability coefficients of O₂ through the nanolaminates at different R.H. levels.

Nanolaminate/Permeating Gas	P [mol∙m∙m−2∙Pa−1∙s−1]	P [Barrer]
PMMA/O2	4.79 (±0.01) × 10−17	1.434 (±0.003) × 10−1
Gr-PMMA/O2	0.21 (±0.01) × 10−17	0.063 (±0.003) × 10−1
PMMA/O2-H2O @RH = 0.50	4.25 (±0.09) × 10−17	1.27 (±0.03) × 10−1
Gr-PMMA/O2-H2O @RH = 0.50	0.15 (±0.03) × 10−17	0.045 (±0.009) × 10−1
PMMA/O2-H2O @RH = 0.80	4.02 (±0.08) × 10−17	1.20 (±0.02) × 10−1
Gr-PMMA/O2-H2O @RH = 0.80	0.20 (±0.04) × 10−17	0.06 (±0.01) × 10−1