Supplementary Information
2
UV
UV-vis spectroscopy was used to investigate the interactions between RGO and Copolymer in a solution state. As shown in Figure1, both NIDO and RGO-NIDO solution exhibit a main absorption band centered at 280 nm, which could be assigned to the Dopa groups. The band position agrees well with those reported in the literature.
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3.5
3.0
2.5
2.0
1.5
1.0
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NIDO
RGO-NIDO2
300 400 500
Wavelength [nm]
600 700
Figure 1: UV-vis spectra of the NIDO (black), NIDO/RGO (blend)(red line)
SEM
Fig. 2a–d shows the SEM-images of the interior microstructure of the dry composite gel, prepared with 1.0 wt.% RGO with respect to polymer of and as shown the graphene sheets are

still visible but the pores are almost invisible, so it appears that the graphenes are completely covered with NIDO, which is the consequence of the interactions of polymer on the RGO-sheets via π−π stacking and hydrogen-bond interactions between functional groups of RGO and hard segment –NH-groups and -C-O-groups of the copolymer chains which has been discussed in our previous articles.
Figure 2: SEM images of dry composite.
References
1.
112.
Kang, S. M.; Park, S.; Kim, D.; Park, S. Y.; Ruoff, R. S.; Lee, H. Adv Funct Mater 2011, 21, (1), 108-