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  TiO2 nanowire growth driven by phosphorus-doped nanocatalysis.

Kim, M. H., Baik, J. M., Zhang, J. P., Larson, C., Li, Y., Stucky, G. D., et al. (2010). TiO2 nanowire growth driven by phosphorus-doped nanocatalysis. Journal of Physical Chemistry C, 114(24), 10697-10702. doi:10.1021/jp1007335.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0012-5C82-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0027-CD1E-9
Genre: Journal Article

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1240574.pdf (Publisher version), 316KB
 
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 Creators:
Kim, M. H., Author
Baik, J. M., Author
Zhang, J. P., Author
Larson, C.1, Author              
Li, Y., Author
Stucky, G. D., Author
Moskovits, M., Author
Wodtke, A. M.1, Author              
Affiliations:
1Department of Dynamics and Surfaces, MPI for biophysical chemistry, Max Planck Society, ou_578600              

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 Abstract: Ni-catalyzed single-crystal TiO2 nanowire growth was observed to occur well below the bulk Ni melting point when a small amount of P was present. TEM, SAED, EDXS, and EELS analyses as well as consideration of the Ni/P phase diagram point to a previously unreported mechanism of nanowire growth catalyzed by a liquid Ni/P eutectic shell surrounding a solid Ni core. High-resolution elemental analysis supports the conclusion that the active catalyst is the outer liquid Ni/P layer with P present at a 3-8% level surrounding a solid Ni core. Growth proceeds by precursor adsorption onto the liquid layer followed by diffusion to the growing surface of the nanowire. This catalyst system produces rutile TiO2 nanowires efficiently. We believe that the technique is generalizable to other metal/dopant systems which could lead to the synthesis of other hard-tosynthesize nanowires.

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Language(s): eng - English
 Dates: 2010-05-27
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1021/jp1007335
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Title: Journal of Physical Chemistry C
  Other : J. Phys. Chem. C
Source Genre: Journal
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Pages: - Volume / Issue: 114 (24) Sequence Number: - Start / End Page: 10697 - 10702 Identifier: -