Tyndall effect of RG-O. Supplementary Figure S5. Tapping mode AFM image and line scan of G-O platelets spin-coated on mica. Supplementary Figure S6.
Supplementary Information Reduced Graphene Oxide by Chemical Graphitization In Kyu Moon, Junghyun Lee, Rodney S. Ruoff, & Hyoyoung Lee
Contents Supplementary Tables S1 Elemental analyses of Graphite, G-O and RG-OHI-AcOH powders Supplementary Tables S2 Dispersion of the RG-OHI-AcOH powder in selected solvents with different polarity indices Supplementary Figure S1 Bulk quantity of RG-OHI-AcOH powder prepared from G-O Using the Solution-Phase Supplementary Figure S2 Possible reduction mechanism and procedure for preparing the RG-OHI-AcOH platelets Supplementary Figure S3 Solubility Test of RG-OHI-AcOH Powder Supplementary Figure S4 Tyndall effect of RG-O Supplementary Figure S5 Tapping mode AFM image and line scan of G-O platelets spin-coated on mica Supplementary Figure S6 Tapping mode AFM image and line scan of RG-OHI-AcOH platelets deposited on SiO2 by spin-coating Supplementary Figure S7 XPS data of GO, and RG-OHI-AcOH powder Supplementary Figure S8 FT-IR spectra of G-O and RG-OHI-AcOH powders Supplementary Figure S9 UV-Vis spectra of G-O and RG-OHI-AcOH platelets
Supplementary Figure S10 Conductivity of RG-OHI-AcOH graphene, chemically converted graphene (CCG), chemically converted graphene (CCG2), and HRG Supplementary Figure S11 Fabrication of G-O paper and VRG-OHI-AcOH paper Supplementary Figure S12 Digital images of the apparatus for preparing VRG-ONH2NH2 paper Supplementary Figure S13 Deconvoluted XPS C1s spectra Supplementary Figure S14 Optical images of the surfaces
Supplementary Table S1 │ Elemental analyses of Graphite, G-O and RG-OHIAcOH
powders.
Materials
C
O
H
N
C/O
C/(O+N)
Graphite
99.28
0.01
-
-
-
-
G-O
44.56
46.43
2.13
0
0.96
-
RG-OHI-AcOH
82.63
7.21
0.64
0
15.27
15.27
Supplementary Table S2 │ Dispersion of the RG-OHI-AcOH powder in selected solvents with different polarity indices35,36. Stable Dispersion Solvents
Polarity index
of RG-OHI-AcOH
DMF
6.4
yes
DMSO
7.2
yes
DMAc
6.5
yes
NMP
6.7
yes
CyH
4.5
no
CH3CN
5.8
no
THF
4.0
no
EtOH
5.2
no
toluene
2.4
no
DCB
2.7
no
DCM
3.1
no
Supplementary Figure S1 │ Bulk quantity of RG-OHI-AcOH powder prepared from G-O Using the Solution-Phase.
Supplementary Figure S2 │ Possible reduction mechanism and procedure for preparing the RG-OHI-AcOH platelets.
Supplementary Figure S3 │Solubility Test of RG-OHI-AcOH Powder. (a) Photographs of RG-OHI-AcOH dispersed in a variety of solvents prepared by 2 h sonication (RG-OHI-AcOH/solvents = 0.3 mg/10 ml; 9:1 volume ratio of solvent to DMF, (b) The photographs were taken 1 week after preparing the RG-OHI-AcOH dispersion.
Supplementary Figure S4 │ Tyndall effect of RG-O. (a) Images of RG-OHI-AcOH, (b) RG-ONH2NH2 colloidal dispersion in DMF (0.3 mg/10 mL) irradiated with a red laser beam. The laser beam was strongly scattered.
Supplementary Figure S5 │ Tapping mode AFM image and line scan of G-O platelets spin-coated on mica. A typical line scan of a single G-O platelet indicates a thickness of ~ 1.0 nm.
Supplementary Figure S6 │ Tapping mode AFM image and line scan of RG-OHIAcOH platelets
deposited on SiO2 by spin-coating. A typical line scan (red line) of
an RG-OHI-AcOH platelet indicates a thickness of about 0.66 nm. Two overlapped RGOHI-AcOH platelets (blue line) have a thickness of about 1.28 nm.
Supplementary Figure S7 │ XPS data of GO, and RG-OHI-AcOH powder. (a) XPS survey scan of graphite, G-O, and RG-OHI-AcOH powder samples, (b) and (c) deconvoluted C1s spectra of G-O, and RG-OHI-AcOH powders, respectively.
Supplementary Figure S8 │ FT-IR spectra of G-O and RG-OHI-AcOH powders. The G-O and RG-OHI-AcOH powders were dispersed in KBr discs (1.0 mg/200.0 mg KBr).
Supplementary Figure S9 │ UV-Vis spectra of G-O and RG-OHI-AcOH platelets. The G-O and RG-OHI-AcOH powders were dispersed in DMF (0.1 mg/mL).
Supplementary Figure S10 │ Conductivity of RG-OHI-AcOH graphene, chemically converted graphene (CCG)14, chemically converted graphene (CCG2)30, and HRG13. A four-probe technique was used for the measurement at room temperature.
Supplementary Figure S11 │ Fabrication of G-O paper and VRG-OHI-AcOH paper.(a) G-O paper pre-patterned (Circle), (b) Flexible G-O paper (Rectangle), (c) Flexible G-O paper (Circle), (d) Preparation of bendable VRG-OHI-AcOH paper exposed to a vapor emanating from the HI-AcOH solution, and (e) Pictures of the bendable VRG-OHI-AcOH paper
Supplementary Figure S12 │ Digital images of the apparatus for preparing VRG-ONH2NH2 paper. G-O paper (lower-left), and VRG-ONH2NH2 paper (upper-left) that was obtained after exposure of the G-O paper to vapor emanating from the hydrazine (35 wt% in water) container.
Supplementary Figure S13 │ Deconvoluted XPS C1s spectra. (a) VRG-ONH2NH2, and (b) VRG-OHI-AcOH paper.
Supplementary Figure S14 │ Optical images of the surfaces. G-O paper (left), VRG-OHI-AcOH paper (middle), and VRG-ONH2NH2 papers (right).
Supplementary References 35. http://www.sanderkok.com/techniques/hplc/eluotropic_series_extended.html (2007). 36. http://macro.lsu.edu/howto/solvents/Polarity%20index.htm (2010).
