Journal article

Control of Symmetry Breaking Size and Aspect Ratio in Gold Nanorods: Underlying Role of Silver Nitrate

Wenming Tong, Michael J Walsh, Paul Mulvaney, Joanne Etheridge, Alison M Funston

JOURNAL OF PHYSICAL CHEMISTRY C | AMER CHEMICAL SOC | Published : 2017

Abstract

Single crystal gold nanorods remain one of the most important and intensively studied anisotropic nanocrystals. The aspect ratio of the nanorods is controlled during the colloidal synthesis using silver nitrate; however, the mechanisms for the underlying control are not well understood. Here, we investigate the growth of gold nanocrystals at the stage where they break symmetry and begin anisotropic growth into nanorods. Using high resolution electron microscopy, we determine directly the size and atomic structure of the nanocrystals at the symmetry breaking point. We find that silver nitrate controls the size of the crystal at which symmetry breaking occurs. The seed crystal undergoes a symm..

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University of Melbourne Researchers

Grants

Awarded by Australian Research Council (ARC)


Awarded by ARC


Funding Acknowledgements

This work was supported by the Australian Research Council (ARC) Grants DP120101573 and DP160104679 and used microscopes at the Monash Centre for Electron Microscopy funded by ARC Grant LE0454166. A.M.F. acknowledges the ARC support through the Future fellowship funding (FT110100545). P.M. thanks the ARC for support through FL100100117. W.T. thanks the Australian Government (Department of Education and Training) and Monash University for providing scholarships (IPRS and APA). The authors wish to express their sincere thanks to Dr. Laurent Lermusiaux for his assistance in manuscript preparation.