Display options
Share it on

J Am Chem Soc. 2005 May 18;127(19):7140-7. doi: 10.1021/ja050107s.

Designing PbSe nanowires and nanorings through oriented attachment of nanoparticles.

Journal of the American Chemical Society

Kyung-Sang Cho, Dmitri V Talapin, Wolfgang Gaschler, Christopher B Murray

Affiliations

  1. Nanoscale Materials and Devices Group, IBM T. J. Watson Research Center, Yorktown Heights, NY 10598, USA.

PMID: 15884956 DOI: 10.1021/ja050107s

Abstract

Single-crystal PbSe nanowires are synthesized in solution through oriented attachment of nanocrystal building blocks. Reaction temperatures of 190-250 degrees C and multicomponent surfactant mixtures result in a nearly defect-free crystal lattice and high uniformity of nanowire diameter along the entire length. The wires' dimensions are tuned by tailoring reaction conditions in a range from approximately 4 to approximately 20 nm in diameter with wire lengths up to approximately 30 microm. PbSe nanocrystals bind to each other on either {100}, {110}, or {111} faces, depending on the surfactant molecules present in the reaction solution. While PbSe nanocrystals have the centrosymmetric rocksalt lattice, they can lack central symmetry due to a noncentrosymmetric arrangement of Pb- and Se-terminated {111} facets and possess dipole driving one-dimensional oriented attachment of nanocrystals to form nanowires. In addition to straight nanowires, zigzag, helical, branched, and tapered nanowires as well as single-crystal nanorings can be controllably prepared in one-pot reactions by careful adjustment of the reaction conditions.

Publication Types