Engineering two-dimensional gold nanostructures using graphene oxide nanosheets as a template

Author(s)

Marangoni, Valeria S. ^[1] ; Germano, Lucas D. ^[1] ; Silva, Cecilia C. C. ^[1] ; de Souza, Eunezio A. ^[1] ; Maroneze, Camila M. ^[1]

Affiliation

^[1] Univ Prebiteriana Mackenzie, MackGraphe Graphene & Nanomat Res Ctr, BR-01302907 Sao Paulo - Brazil

• Document type: Journal article
• Source: NANOSCALE; v. 10, n. 28, p. 13315-13319, JUL 28 2018.
• Web of Science Citations: 2

Abstract

The rich plasmon resonance modes and local field enhancements of two-dimensional (2D) noble metal nanostructures have boosted their application in distinct areas like catalysis, photonics, medicine and sensing. Here, we develop a unique strategy for the controlled growth of asymmetric 2D gold nanostructures in aqueous media using graphene oxide as a template. By performing mild reduction of gold ions on the surface of Au seeds (approximate to 2 nm) attached to graphene oxide nanosheets, the anisotropic growth of 2D gold nanostructures can be carried out through a simple procedure with a tunable control of the final size, shape and thickness, and consequently on their optical properties, without using surfactants. (AU)

• FAPESP's process: 12/50259-8 - Graphene: photonics and opto-electronics: UPM-NUS collaboration
• Grantee: Antônio Hélio de Castro Neto
• Support type: Research Projects - SPEC Program
• FAPESP's process: 16/20799-1 - Van der Waals heterostructure architectures in liquid media: application in photonic devices
• Grantee: Valéria Spolon Marangoni
• Support type: Scholarships in Brazil - Post-Doctorate