Karmakar, Sukanta ; Sharma, Surinder M. ; Teredesai, P. V. ; Sood, A. K. (2004) Pressure-induced phase transitions in iron-filled carbon nanotubes: X-ray diffraction studies Physical Review B: Condensed Matter and Materials Physics, 69 (16). 165414_1-165414_5. ISSN 1098-0121
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Official URL: http://prb.aps.org/abstract/PRB/v69/i16/e165414
Related URL: http://dx.doi.org/10.1103/PhysRevB.69.165414
Abstract
High-pressure X-ray-diffraction studies have been carried out upto 20 GPa on iron-filled multiwalled carbon nanotubes (MWNTs). The pressure dependence of the intertubular spacing d0 of the filled MWNTs shows a sharp change at 9 GPa which is not observed in pristine MWNTs. The iron present as nanowires inside the MWNT is in the form of α-Fe and Fe3C. Both of these phases show higher compressibility than their bulk form. Most interestingly, the structural modification of MWNTs at 9 GPa coincides with an iso-structural phase transition in the encapsulated Fe3C, in sharp contrast to the absence of a transition in the bulk Fe3C upto 70 GPa.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 48144 |
| Deposited On: | 13 Jul 2011 14:24 |
| Last Modified: | 04 Oct 2011 13:57 |
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