"In-situ" XAFS and SAXS study of the kinetics of growth of Au nanowires

JOSE M. RAMALLO LÓPEZ; CRISTINA E. HOPPE; LISANDRO J. GIOVANETTI; CRISTIÁN HUCK IRIART; FELIX G. REQUEJO

Quebec

Congreso; NANO 2016; 2016

The slow reduction of Au-oleylamine complex by tri-isopropil-silano (TIPS) results in the formation of wires of nanometric radius[1]. In this work we studied the kinetics of growth of the Au nanowires (NWs) by means of ?in situ? studies using X-ray Absorption Fine Structure (XAFS) Spectroscopy at the Au L3 edge and Small Angle X-ray Scattering (SAXS). Samples were prepared by mixing a solution of 3 mg of HAuCl4 in 2.5 ml of hexane with 100 μl of Oleylamine and 150 μl of TIPS. The reaction occurs at room temperature without stirring. XAFS experiments were performed using a liquid cell at the XAFS2 and XDS beamlines of the Laboratorio Nacional de Luz Sincrotron in Campinas, Brazil and using an RXAS Looper spectrometer from Rigaku. SAXS experiments were performed using a XEUSS 1.0 laboratory beamline from XENOCS