کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1625965 | 1516429 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Inelastic neutron scattering of H2 adsorbed on boron substituted single walled carbon nanotubes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
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چکیده انگلیسی
We report inelastic neutron scattering investigations of hydrogen adsorbed on both purified boron substituted (â¤1%) single walled carbon nanotube bundles and purified single walled carbon nanotube bundles. Samples of both types were generated by both arc and laser production methods. At H2 coverages â¤3 H2/B, a clear splitting is observed for the H2 rotation transition peak at about 14.7 meV in all arc-produced samples. In contrast, the spectra from laser-produced materials exhibit one broad peak. Further increase in H2 coverage results in adsorption at lower binding energy sites. No distinct signature of an enhanced boron-hydrogen interaction is observed. However, the overall line width of the rotation transition peak from a laser-produced sample is substantially smaller than that from arc-prepared samples. This difference might imply that some features of the H2 rotation transition peak might not be due to the intrinsic features of single wall carbon nanotubes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volumes 446â447, 31 October 2007, Pages 368-372
Journal: Journal of Alloys and Compounds - Volumes 446â447, 31 October 2007, Pages 368-372
نویسندگان
Y. Liu, C.M. Brown, J.L. Blackburn, D.A. Neumann, T. Gennett, L. Simpson, P. Parilla, A.C. Dillon, M.J. Heben,