We report a new type of water-soluble ultrathin Au-Ag alloy nanowire (NW), which exhibits unprecedented behavior in a colloidal solution. Upon growth of a thin metal (Pd, Pt, or Au) layer, the NW winds around itself to give a metallic double helix. We propose that the winding originates from the chirality within the as-synthesized Au-Ag NWs, which were induced to untwist upon metal deposition. © 2011 American Chemical Society.
Bibliographical noteKAUST Repository Item: Exported on 2020-10-01
Acknowledgements: We thank Prof. Chan Yin Thai from National University of Singapore for the helpful advice. This work was supported by the MOE (ARC 13/09) and A*Star (102-152-0018) of Singapore.
ASJC Scopus subject areas
- Colloid and Surface Chemistry