J Catal 2007, 250:231–239.CrossRef 16. Chowdhury A-N, Alam MT, Okajima T, Ohsaka T: Fabrication of Au(111) facet enriched electrode on glassy carbon. J Electroanal Chem 2009, 634:35–41.CrossRef 17. Birkholz M, Fewster PF: High-resolution X-ray diffraction. In Thin Film Analysis by X-Ray Scattering. Berlin: Wiley; 2006:297–341.CrossRef 18. Abd A-1210477 in vivo Rahim AF, Hashim MR, Ali NK: High sensitivity of palladium on porous silicon MSM photodetector. Physica B: Condens Matter 2011, 406:1034–1037.CrossRef 19. Bassu M, Strambini ML, Barillaro G, Fuso F: Light emission from silicon/gold nanoparticle systems. Appl Phys Lett 2011, 97:143113–143113–143113. 20. Chan K, Goh BT, Rahman SA, Muhamad

MR, Dee CF, Aspanut Z: Annealing effect on the structural and optical properties of embedded Au nanoparticles in silicon suboxide films. Vacuum 2012, 86:1367–1372.CrossRef 21. Zhou HS, Honma I, Komiyama

H, Haus JW: Controlled synthesis and quantum-size effect in gold-coated nanoparticles. Phys Rev B 1994, 50:12052–12056.CrossRef 22. Daniel M-C, Astruc D: Gold nanoparticles: assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology. Chem Rev 2003, 104:293–346.CrossRef Competing interests The authors declare that they have no competing interests. Authors’ contributions VX-689 TSTA carried out the main experimental work. MRH supervised the research activity. NKAA organized the manuscript. HY and RA prepared and made the chemical characterization of the AuNPs. All authors read and approved the final manuscript.”
“Background Graphene, a two-dimensional single atomic layer of sp 2 -hybridized carbon arranged in a honeycomb structure, has generated tremendous interest due to its unique combination of electronic, mechanical, chemical, and selleck products thermal properties [1–4]. Many potential applications in various fields, including Sitaxentan filler materials [5, 6], field-emission devices [4], nanoscale electronic devices [7], sensors [8–10], transparent electrodes [11–14],

and so on [15–18], have been reported. Large-scale preparation of paper-like graphene films has aroused much attention for their unique mechanical and electrical properties [15, 16, 19–22]. Some methods, including micromechanical exfoliation [1], chemical vapor deposition [12, 23–25], and self-assembly [26–32] have been used to prepare this fascinating structure of the films, which have great potential for the applications in transparent electrodes [25], supercapacitors [33], biosensors [34], etc. Meanwhile, some noble metal nanoparticles have been added into the graphene films to improve the electronic and electrochemical properties of the composite films [31, 32] using many methods, such as chemical reduction [33], electrochemical reduction [34], biochemical reduction [35], and in situ thermal reduction [36].