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On the stability of...
On the stability of single-walled carbon nanotubes and their binding strengths
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- Baran, Jakub, 1980 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,University College Cork, National University Of Ireland,Tyndall National Institute, University College Cork
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- Kolodziejczyk, Wojchiech (author)
- University College Cork, National University Of Ireland,Tyndall National Institute, University College Cork
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- Larsson, Peter (author)
- Uppsala universitet,Materialteori,Division of Materials Theory, Department of Physics and Astronomy, Uppsala University,Uppsala University
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- Ahuja, Rajeev (author)
- Uppsala universitet,Materialteori,Division of Materials Theory, Department of Physics and Astronomy, Uppsala University,Uppsala University
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- Larsson, Andreas (author)
- University College Cork, National University Of Ireland
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(creator_code:org_t)
- 2012-09-12
- 2012
- English.
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In: Theoretical Chemistry Accounts. - : Springer Science and Business Media LLC. - 1432-881X .- 1432-2234. ; 131:9, s. 1-8
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Abstract
Subject headings
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- We have studied the relative stability of hydrogen-terminated single-walled carbon nanotubes (SWNTs) segments, and open-ended SWNT fragments of varying diameter and chirality that are present at the interface of the catalytic metal particles during growth. We have found that hydrogen-terminated SWNTs differ by < 1 eV in stability among different chiralities, which presents a challenge for selective and property-controlled growth. In addition, both zigzag and armchair tubes can be the most stable chirality of hydrogen-terminated SWNTs, which is a fundamental obstacle for property-controlled growth utilizing thermodynamic stability. In contrast, the most armchair-like open-ended SWNTs segments are always the most stable ones, followed in sequence by chiral index up to the least stable zigzag segments. We explain the ordering by triple bond stabilization of the carbon dangling bonds at the open ends, which is a fragment stabilization effect that is only manifested when all bonds between two layers are broken. We show convincingly that the bond strength difference between zigzag and armchair tubes is not present when individual bonds are broken or formed. © Springer-Verlag 2012.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Keyword
- Density functional theory
- Vapor-liquid-solid mechanism
- CVD growth
- Carbon nanotubes
Publication and Content Type
- art (subject category)
- ref (subject category)
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