Noncovalent functionalization of carbon nanotubes and graphene with tetraphenylporphyrins: stability and optical properties from ab initio calculations
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Fecha
2014-11
Autores
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
Journal of Materials Science
Nombre de Curso
Licencia CC
Atribución 4.0 Internacional (CC BY 4.0)
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
The stability, electronic, and optical properties of single-walled carbon nanotubes (CNTs) and graphene non-covalently functionalized with free-base tetraphenylporphyrin (TPP) molecules is addressed by density functional theory calculations. We study the TPP physisorption on 42 CNT species, particularly those with chiral indices (n,m), where interaction between TPP and the CNT surface, with binding energies ranging from 1.1 to 1.8 eV, where higher energies can be associated with increasing CNT diameters. We also find that the TPP optical absorptions would not be affected by the CNT diameter or chirality. Results for the TPP physisorption on graphene show a remarkable stability with binding energy of 3.2 eV, inducing a small redshift on the π-stacked TPP absorption bands. The strong graphene–TPP interaction also induces a charge transfer from TPP to graphene, indicating a n-type doping mechanism without compromising the graphene structure. © 2014, Springer Science+Business Media New York.
Notas
Indexación: Scopus
Palabras clave
Binding energy, Calculations, Charge transfer, Density functional theory, Nanotubes, Optical properties, Physisorption, Single-walled carbon nanotubes (SWCN), Stereochemistry
Citación
DOI
10.1007/s10853-014-8650-0