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Electronic Supplementary Information
Fabrication of Two-dimensional Hybrid Sheets by Decorating Insulating PANI on
Reduced Graphene Oxide for Polymer Nanocomposites with Low Dielectric Loss and
High Dielectric Constant
Mi Li,a Xingyi Huanga* Chao Wu,a Haiping Xu,b Pingkai Jiang,a* Toshikatsu Tanakac
aDepartment of Polymer Science and Engineering, Shanghai Key Lab of Electrical Insulation and Thermal Aging,
Shanghai Jiao Tong University, Shanghai 200240, China,
bSchool of Urban Development and Environmental Engineering, Shanghai Second Polytechnic University, Shanghai
201209, China
cIPS Research Center, Waseda University, Kitakyushu, Fukuoka, Japan
Electronic Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2012
Figure S1. General XPS spectra of PANI, rPANI, GO and rGO (a), deconvoluted N1s spectra of PANI (b) and rPANI
(c) and the deconvoluted C1s spectra of GO (d) and rGO (e). According to Figure S1b, a peak of nitrogen cationic
amine appears, whereas it is not observed in deconvoluted N1s spectra of rPANI@rGO. The appearance of such a
peak in rPANI may be attributed to the absorption of protonic acid from atmosphere.
Electronic Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2012
Table S1 Relative percentages of carbon and functional groups of PANI@GO, rPANI@rGO, GO and rGO
Sample C (sp2) % C(sp3) % C-N % C-O % C=O % O-C=O %
PANI@GO 17.18 35.30 4.76 35.81 6.13 0.82
rPANI@rGO 55.55 22.95 10.94 5.33 2.98 1.57
GO 19.20 17.17 - 57.56 5.12 0.95
rGO 59.85 15.33 4.54 7.24 8.49 4.55
Table S2 Relative percentages of amine groups of PANI@GO, rPANI@rGO, PANI and rPANI
Sample Benzenoid amine % Quinoid amine % Nitrogen cationic amine %
PANI@GO 56.71 0 43.29
PANI@rGO 87.17 12.73 0
ANI 52.62 0 47.38
rPANI 85.11 3 11.89
Figure S2. SEM images of the PMMA/rPANI@rGO composite with rGO/PMMA ratio of 4% (a), PMMA/rGO
Electronic Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2012
composite with rGO/PMMA ratio of 4% (b, c) and neat PMMA (d). Images of (a), (b) and (d) have the same
magnification of 2000, while (c) is enlarged from (b) and has a magnification of 5000. One can see from (c) that
individual rGO sheets are not easily found and the sample shows large sized rGO aggregations, which forms sharp
contract with Figure 8.
Figure S3. Frequency dependence of dielectric constant (a), dielectric loss tangent (b) and conductivity (c) of the
PMMA/rGO composites.
Figure S4. Frequency dependence of dielectric constant (A), dielectric loss tangent (B) of the PMMA/GO and
PMMA/rPANI composites. a) The fraction of 2% means the ratio of rPNAI/PMMA in PMMA/rPNAI is equal to the
ratio of rPNAI/PMMA in PMMA/rPNAI@rGO with rGO/PMMA ratio of 2%, b) The fraction of 4% means the ratio
of rPNAI/PMMA in PMMA/rPNAI is equal to the ratio of rPNAI/PMMA in PMMA/rPNAI@rGO with rGO/PMMA
ratio of 4%
Electronic Supplementary Material (ESI) for Journal of Materials ChemistryThis journal is © The Royal Society of Chemistry 2012