Figure shows that the dry interlayer space (black dots) of rGO films before and after the electrochemical treatment remains at ~7.7 ±0.4 Å. The measurements of the wet interlayer spaces show that after 1 min of synthesis the swelling of rGO films is limited to ~8.9 ±0.8 Å compared to 11 ±2 Å in original GO. For duration > 5 min, the wet interlayer distances were limited to ~8.2 ±0.6 Å. Figure shows exemplary XRD spectra of wet and dry GO. The clear gaussian-shaped peaks indicate that the lamellar structure of GO was intact during and after synthesis. Furthermore, the cross-sectional SEM image shown in Figure confirms that the overall thickness of the rGO film remains stable after the electrochemical synthesis.