Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2013
Synthesis of a Nanocomposite Composed of Reduced Graphene Oxide and Gold Nanoparticles Henan Zhang∗, Deon Hines, and Daniel L. Akins Department of Chemistry, The City College of the City University of New York 160 Convent Avenue, 10031, New York, NY, USA
∗ Author to whom Correspondence should be addressed: Tel: 1-212-650-5935; Fax: 1-212-650-6848; E-mail:
[email protected]
Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2013
0.5
GO
230 nm
Intensity/ a.u.
0.4 0.3 0.2 0.1 0.0 -0.1 200
300
400
500
600
700
Wavelength (nm)
Figure S1. UV-Vis spectra of GO.
γ G/S=10:1 γ G/S=10:5 γ G/S=12.5:1 γ G/S=15:2 γ G/S=12.5:5
Intensity/ a.u.
1.0
0.5
0.0
500
550
600
650
700
Wavelength/ nm
Figure S2. UV-Vis spectra of synthesized Au NPs with different volume ratios of growth to seeds solution without the addition of GO.
Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2013
Au NPs
1.0
Frequence %
0.8
0.6
0.4
0.2
0.0
22
24
26
28
30
32
34
36
Particle Diameter (nm)
Figure S3. TEM image of seeding-growth approach synthesized Au NPs, the size distribution of Au NPs and Uv-vis of Au NPs.
Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2013
Figure S4. TEM image of rGO-Au composites
Table S1. The size distribution of Au NPs on rGO surface Sample L4 L5 L6
γ G/S
8.0/4.0 12.0/4.0 20.0/4.0
Diam./ nm ~12.55 ~22.36 ~35.69
Scheme S1. Schematic representation of the mechanism of gold nanoparticles attached onto the oxygen functionalities of exfoliated graphene nanosheets.
Electronic Supplementary Material (ESI) for Dalton Transactions This journal is © The Royal Society of Chemistry 2013
Figure S5. TEM, SEM and EDX images of synthesized high density Au NPs on rGO surface.
