The relation between the average diameter of CNTs on Ni-Cu @ a-C:H catalyst with the optical absorption edge and the optical dispersion parameters.
the average diameter of CNTs
the optical absorption coefficients
the optical band gaps
the optical dispersion parameters
Journal
Journal of microscopy
ISSN: 1365-2818
Titre abrégé: J Microsc
Pays: England
ID NLM: 0204522
Informations de publication
Date de publication:
Apr 2021
Apr 2021
Historique:
received:
01
06
2020
revised:
12
08
2020
accepted:
09
10
2020
pubmed:
14
10
2020
medline:
14
10
2020
entrez:
13
10
2020
Statut:
ppublish
Résumé
In this study, the average diameter of the grown CNTs on Ni-Cu NPs @ a-C:H substrates were increased by increasing of Cu content. The obtained results indicated that by increase of Cu content, all films exhibited high-absorption spectra; therefore, we were facing an increase in the energy gap of films. The values of dT/dλ and dR/dλ measurements for grown CNTs with 75% Cu shown that maximum values of optical band gap correspond to with values of 2.48 eV and 2.90 eV, respectively. It can be seen that with increase of average diameter of the grown CNTs, the values of Urbach energy of films were increased. The RBS and EDAX measurements were confirmed presence of Ni and Cu atoms into films. The films deposited with 75% Cu were more smooth. Films deposited with 75% Cu have more disordered. Films deposited with 75% Cu atoms have maximum values of the oscillator strength f and the dispersion energy E
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
3-12Informations de copyright
© 2020 Royal Microscopical Society.
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