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Controlled fabrication of hierarchically branched nanopores, nanotubes, and nanowires

Summary: Controlled fabrication of hierarchically branched
nanopores, nanotubes, and nanowires
Guowen Meng*, Yung Joon Jung*, Anyuan Cao*, Robert Vajtai*
, and Pulickel M. Ajayan*
*Department of Materials Science and Engineering and Rensselaer Nanotechnology Center, Rensselaer Polytechnic Institute, Troy, NY 12180
Communicated by Bruce Watson, Rensselaer Polytechnic Institute, Troy, NY, March 14, 2005 (received for review January 18, 2005)
Here, we report a generic synthetic approach to rationally design
multiply connected and hierarchically branched nanopores inside
anodic aluminum oxide templates. By using these nanochannels,
we controllably fabricate a large variety of branched nanostruc-
tures, far more complex than what exists today. These nanostruc-
tures include carbon nanotubes and metallic nanowires having
several hierarchical levels of multiple branching. The number and
frequency of branching, dimensions, and the overall architecture
are controlled precisely through pore design and templated as-
sembly. The technique provides a powerful approach to produce
nanostructures of greater morphological complexity, which could
have far-reaching implications in the design of future nanoscale
The design and controlled synthesis of complex nanowire


Source: Ajayan, Pulickel M. - Department of Mechanical Engineering and Materials Science, Rice University


Collections: Materials Science