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Article

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

by
Nii Amah Dagadu
1,
Shahram Ajori
2,
Yaw Delali Bensah
1,
Kwabena Kan-Dapaah
3,
Stephen Kofi Armah
1,
Boateng Onwona-Agyeman
1 and
Abu Yaya
1,*
1
Department of Materials Science and Engineering, School of Engineering Sciences, CBAS, University of Ghana, Legon P.O. Box LG 77, Ghana
2
Department of Mechanical Engineering, Faculty of Engineering, University of Maragheh, Maragheh P.O. Box 55136-553, Iran
3
Department of Biomedical Engineering, School of Engineering Sciences, CBAS, University of Ghana, Legon P.O. Box LG 77, Ghana
*
Author to whom correspondence should be addressed.
Molecules 2020, 25(20), 4812; https://doi.org/10.3390/molecules25204812
Submission received: 4 September 2020 / Revised: 25 September 2020 / Accepted: 9 October 2020 / Published: 20 October 2020
(This article belongs to the Special Issue Fullerenes, Graphenes and Carbon Nanotubes Nanocomposites)
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Abstract

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.
Keywords: poly para-phenylene vinylene (PPV) oligomers; graphene; carbon nanotube; interfacial interaction poly para-phenylene vinylene (PPV) oligomers; graphene; carbon nanotube; interfacial interaction

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MDPI and ACS Style

Dagadu, N.A.; Ajori, S.; Bensah, Y.D.; Kan-Dapaah, K.; Armah, S.K.; Onwona-Agyeman, B.; Yaya, A. Stacking Interactions of Poly Para-Phenylene Vinylene Oligomers with Graphene and Single-Walled Carbon Nanotubes: A Molecular Dynamics Approach. Molecules 2020, 25, 4812. https://doi.org/10.3390/molecules25204812

AMA Style

Dagadu NA, Ajori S, Bensah YD, Kan-Dapaah K, Armah SK, Onwona-Agyeman B, Yaya A. Stacking Interactions of Poly Para-Phenylene Vinylene Oligomers with Graphene and Single-Walled Carbon Nanotubes: A Molecular Dynamics Approach. Molecules. 2020; 25(20):4812. https://doi.org/10.3390/molecules25204812

Chicago/Turabian Style

Dagadu, Nii Amah, Shahram Ajori, Yaw Delali Bensah, Kwabena Kan-Dapaah, Stephen Kofi Armah, Boateng Onwona-Agyeman, and Abu Yaya. 2020. "Stacking Interactions of Poly Para-Phenylene Vinylene Oligomers with Graphene and Single-Walled Carbon Nanotubes: A Molecular Dynamics Approach" Molecules 25, no. 20: 4812. https://doi.org/10.3390/molecules25204812

APA Style

Dagadu, N. A., Ajori, S., Bensah, Y. D., Kan-Dapaah, K., Armah, S. K., Onwona-Agyeman, B., & Yaya, A. (2020). Stacking Interactions of Poly Para-Phenylene Vinylene Oligomers with Graphene and Single-Walled Carbon Nanotubes: A Molecular Dynamics Approach. Molecules, 25(20), 4812. https://doi.org/10.3390/molecules25204812

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