Temperature-Induced Nucleation of Poly(p-phenylene vinylene-co-2,5-dioctyloxy-m-phenylene vinylene) Crystallization by HiPco Single-Walled Carbon Nanotubes

2005 ◽  
Vol 109 (12) ◽  
pp. 5600-5607 ◽  
Author(s):  
S. M. Keogh ◽  
T. G. Hedderman ◽  
M. G. Rüther ◽  
F. M. Lyng ◽  
E. Gregan ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Phenylene Vinylene ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Stacking Interactions of Poly Para-Phenylene Vinylene Oligomers with Graphene and Single-Walled Carbon Nanotubes: A Molecular Dynamics Approach

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4812
Author(s):  
Nii Amah Dagadu ◽  
Shahram Ajori ◽  
Yaw Delali Bensah ◽  
Kwabena Kan-Dapaah ◽  
Stephen Kofi Armah ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Monomer Unit ◽  
Single Walled Carbon Nanotubes ◽  
Distribution Functions ◽  
Binding Energies ◽  
Phenylene Vinylene ◽  
Radius Of Gyration ◽  
Stable Conformation ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

This study is meant to address the understanding of the interactions between poly para-phenylene vinylene (PPV) oligomers, graphene and single-walled carbon nanotubes (SWCNT). To this end, the binding energies of the PPV oligomers with graphene and SWCNTs were investigated. Calculations are performed and the parameters related to van der Waal vdW interactions are discussed to achieve and confirm the crystallization of oligomers of PPV into herringbone (HB) structure arrangement, which is known to be the most stable conformation at 300 K. Finally, the interfacial interactions between crystal PPV, graphene and SWCNT are carried out. According to the results, the intramolecular potential energies of PPV chains are found to increase linearly with each extending PPV monomer unit by approximately 50 kcal/mol. Moreover, the interfacial interaction properties analysis using radial distribution functions (RDFs) for PPV-graphene and PPV-SWCNT show significant disordering of the arrangement of molecules, which is more pronounced for PPV-SWCNT than that in PPV-graphene. The radius of gyration (Rg) profiles show a net decrease of ∼−0.8, for PPV-graphene with different surface coverage, and, a net increase of ∼+0.6, for PPV-SWCNT; meaning that, the binding between PPV-graphene is much stronger than with PPV-SWCNT.

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes
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