Fabrication of a graphene oxide–gold nanorod hybrid material by electrostatic self-assembly for surface-enhanced Raman scattering

• Published in: Carbon (New York) Vol. 51; pp. 255 - 264
• Main Authors: Hu, Chaofan, Rong, Jianhua, Cui, Jianghu, Yang, Yunhua, Yang, Lufeng, Wang, Yaling, Liu, Yingliang
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.01.2013; Elsevier
• Subjects: atomic force microscopy; Cross-disciplinary physics: materials science; rheology; dyes; Exact sciences and technology; Fullerenes and related materials; diamonds, graphite; gold; graphene; Materials science; nanorods; Physics; Raman spectroscopy; Specific materials; surfactants; transmission electron microscopy; zeta potential; Atomic force microscopy; Gold; Dyes; Hybrid material; Surfactants; Raman spectroscopy; Aggregation; Surface enhanced scattering; Self-assembly; Transmission electron microscopy; Transition elements; Electrokinetic potential; Graphene oxide; Electrostatics; Nanorod
• ISSN: 0008-6223; 1873-3891
• DOI: 10.1016/j.carbon.2012.08.051

An electrostatic self-assembly procedure was used to fabricate graphene oxide (GO) and gold nanorod (AuNR) hybrids (GO–AuNR), in which poly (N-vinyl-2-pyrrolidone) was used as a stabilizing surfactant to prevent the aggregations of GO sheets. AuNRs were loaded onto the surface of GO, which was confirmed by zeta potential measurements, transmission electron microscopy, atomic force microscopy, UV–Vis–NIR and Raman spectroscopy. The GO–AuNR materials show a great increase of Raman signals for adsorbed aromatic dye molecules, which was demonstrated using cationic and anionic aromatic dyes as probe molecules.