▎ 摘　　要

Background: Reduced graphene oxide (rGO), polyaniline (PANI), and their composites are advanced nano-materials widely used in flexible sensor fabrication. However, the interfacial interactions between graphene and PANI of different shapes/dimensionalities have been unknown. This study aimed to close this gap by hypothe-sizing that the stacking of PANI on rGO relies on its shape and is relatable to the composite's electrical properties. Methods: rGO was acted as a substrate for the in situ polymerization of aniline. Acidity of the polymerization medium was manipulated using H2SO4, CH3COOH, and distilled water (DW) to yield globule (0-D), tube (1-D), and plate (2-D) PANIs, respectively. Significant findings: Unique rGO-PANI nanocomposites with various stacking orientations were successfully produced. The distribution of PANIH2SO4 on rGO is more pronounced than PANICH3COOH and PANIDW, suggesting that the 0-D PANIs have better interfacial interaction with rGO than 1-D and 2-D PANIs. Only few 3-D PANIs were found to grow on rGO. The electrical conductance of rGO-PANIH2SO4 (3.34 x 10-4 S) was a thousand times greater than rGO-PANICH3COOH (6.52 x 10-7S) and ten million times greater than rGO-PANIDW(6.89 x 10-11S), attributed to both interfacial interaction and oxidation state of PANIs. The results were further verified and justified with FTIR and XRD analyses.