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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: Biomaterials. 2013 Aug 12;34(34):8660–8670. doi: 10.1016/j.biomaterials.2013.07.101

Figure 2.

Figure 2

(a) Schematic diagram representing four different substrates modified with graphene (Substrate B), gold nanoparticles (Substrate C) and GO-encapsulated GNP (Substrate D). (b) AFM images of Substrate D and (c) high resolution AFM image of (b) for the confirmation of GO-encapsulated GNP nanoparticles. The X and Y axis were 3um × 3um and 200nm × 200nm for image (b) and (c), respectively, and the scan rate was 0.5Hz and 0.1Hz for image (b) and (c), respectively. (D) SEM image of Substrate D with a high concentrations of GO-encapsulated GNP. (e) Raman spectra of Substrate D to verify the encapsulation of GO on the surface of the GNPs.