Gold tetrapod Decorated Three-dimensional Graphene: Synthesis and Characterization
Paper ID : 1167-ICNS
Authors:
Mohsen Saeidi *1, Min-Jong Lee2, Odongo Francis Ngome Okello2, Si-Young Choi2, Seung-Soo Oh2, Abdolreza Simchi1
1Department of Materials Science and Engineering, Sharif University of Technology, Tehran, 14588, Iran
2Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 37673, South Korea
Abstract:
The development of free-standing bioelectronic devices, such as electrochemical biosensors, still remains a challenge. In this work, three-dimensional graphene macroscopic structures and gold tetrapods are first prepared via the microwave-assisted hydrothermal and seed-mediated growth methods, respectively. Finally, the 3DG/Au tetrapod hybrids are obtained via a similar method used in producing gold tetrapods. The UV-vis spectra of Au tetrapod show absorbance at 574 nm belonged to the transversal gold plasmon mode. Besides, field emission-scanning electron microscopy (FE-SEM) images manifest that Au tetrapods are uniformly dispersed on interconnected and hierarchically porous structures of graphene. Moreover, high resolution-transmission electron microscopy (HR-TEM) images of pure gold tetrapods as well as 3DG/Au tetrapod hybrids also confirm the gold tetrapod formation with a size of 10-50 nm. Due to the gradual growth trend, other morphologies such as tripods are formed, as well. These 3D-graphene/gold tetrapod hybrids are among the most attractive interconnections in the “bottom-up” self-assembly approach toward future nanocircuits and nanodevices.
Keywords:
3D graphene/gold tetrapod hybrids; HR-TEM; Biosensors; Gold nanostructures
Status : Abstract Accepted (Poster Presentation)