dc.contributor.author | Blackburn, Jeff | en_US |
dc.contributor.author | Yan, Yanfa | en_US |
dc.contributor.author | Engtrakul, Chaiwat | en_US |
dc.contributor.author | Parilla, Philip | en_US |
dc.contributor.author | Jones, Kim | en_US |
dc.contributor.author | Gennett, Thomas | en_US |
dc.contributor.author | Dillon, Anne | en_US |
dc.contributor.author | Heben, Michael | en_US |
dc.date.accessioned | 2006-07-19T20:09:28Z | en_US |
dc.date.available | 2006-07-19T20:09:28Z | en_US |
dc.date.issued | 2006-05-16 | en_US |
dc.identifier.citation | Chemistry of Materials 18N10 (2006) 2558-2566 | en_US |
dc.identifier.issn | 1520-5002 | en_US |
dc.identifier.uri | http://hdl.handle.net/1850/2267 | en_US |
dc.description.abstract | We present the first successful high-yield laser vaporization synthesis of high-quality boron-doped single-wall carbon nanotubes (B-SWNTs). Boron was loaded into graphite targets in the form of elemental B as well as nickel boride (NiB) and vaporized in a laser-oven apparatus in both Ar and N2 ambients. Although targets containing elemental B produced no or low yields of SWNTs, the NiB catalyst in N2 produced SWNT bundles comparable in quality to the best pure-carbon SWNTs produced from traditional Ni/Co catalysts. A variety of different samples were analyzed by transmission electron microscopy, Raman spectroscopy, X-ray diffraction, and nanoprobe electron energy loss spectroscopy (EELS). Boron was found to be doped substitutionally in the SWNT lattice at contents up to 1.8 at % by EELS. The 13C NMR chemical shift of SWNT nuclei is affected by boron doping by shifting to higher frequency, as expected for p-type doping. The EELS and NMR data exclude the possibility of B and N codoping. Aspects of the growth mechanism are discussed. | en_US |
dc.description.sponsorship | We thank Mark Davis for assistance with NMR experiments and Mowafak Al-Jassim for facilitating EELS measurements. This work was funded by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Hydrogen Program and by the Office of Science, Basic Energy Sciences, Division of Materials Sciences and Engineering under Subcontract DE-AC36-99GO10337 to NREL. | en_US |
dc.format.extent | 31371 bytes | en_US |
dc.format.mimetype | application/pdf | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | The American Chemical Society: Chemistry of Materials | en_US |
dc.subject | Boron doping | en_US |
dc.subject | Carbon nanotubes | en_US |
dc.subject | Laser vaporization | en_US |
dc.title | Synthesis and characterization of boron-doped single-wall carbon nanotubes produced by the laser vaporization technique | en_US |
dc.type | Abstract | en_US |
dc.identifier.url | http://dx.doi.org/10.1021/cm060192i | |