Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 130, Issue 41, Pages 13555-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja805683r
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- University of Pittsburgh
- Department of Mechanical Engineering and Materials Science
- Petersen Institute for Nanoscience and Engineering (PINSE)
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Left-handed gold nanoparticle double helices were prepared using a new method that allows simultaneous synthesis and assembly of discrete nanoparticles. This method involves coupling the processes of peptide self-assembly of and peptide-based biomineralization of nanoparticles. In this study, AYSSGAPPMPPF(PEPAu), an oligopeptide with an affinity for gold surfaces, was modified with an aliphatic tail to generate C-12-PEPAu. In the presence of buffers and gold salts, amphiphilic C-12-PEPAu was used to both control the formation of monodisperse gold nanoparticles and simultaneously direct their assembly into left-handed gold nanoparticle double helices. The gold nanoparticle double helices are highly regular, spatially complex, and they exemplify the utility of this methodology for rationally controlling the topology of nanoparticle superstructures and the stereochemical organization of discrete nanoparticles within these structures.
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