Journal article

Growth of Gold Nanorods: A SAXS Study

Susanne Seibt, Heyou Zhang, Stephen Mudie, Stephan Foerster, Paul Mulvaney

JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2021

Abstract

Using simultaneous, in situ optical spectroscopy and time-resolved, small-angle X-ray scattering (SAXS), we have directly monitored the seeded growth of nearly monodisperse gold nanorods using hydroquinone as the reductant. Growth of the rods is much slower than with the ascorbate ion, allowing the rate of growth along both the longitudinal and transverse directions to be independently determined. The thickness of the stabilizing CTAB layer (3.2 ± 0.3 nm) has also been extracted. We find that increasing the hydrogen tetrachloroaurate(III) concentration produces longer rods, while conversely, increasing the hydroquinone concentration reduces the final aspect ratio. The final number of gold ro..

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University of Melbourne Researchers

Grants

Awarded by ERC Advanced Grant


Awarded by German Ministry BMBF


Awarded by German Science Foundation (DFG/GRK)


Awarded by ARC Centre of Excellence in Exciton Science


Awarded by Australian Synchrotron, ANSTO


Funding Acknowledgements

This work was financially supported by an ERC Advanced Grant (STREAM, #291211), by the German Ministry BMBF (#05K13WC5), and the German Science Foundation (DFG/GRK 1640). The authors acknowledge financial support by the German Academic Exchange Service (DAAD) through its Thematic Network, the Melbourne-Bayreuth Polymer/Colloid Network, sponsored from funds of the Federal Ministry of Education and Research (BMBF). S.S., H.Z., and P.M. acknowledge support through the ARC Centre of Excellence in Exciton Science (CE170100026). The authors also thank the staff of the Australian Synchrotron, ANSTO, where the SAXS experiments were performed at the SAXS/WAXS beamline through grant number M11824.