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Field emission luminescence of nanodiamonds deposited on the aligned carbon nanotube array.

Field emission luminescence of nanodiamonds deposited on the aligned carbon nanotube array.

Authors :
Fedoseeva YV
Bulusheva LG
Okotrub AV
Kanygin MA
Gorodetskiy DV
Asanov IP
Vyalikh DV
Puzyr AP
Bondar VS
Source :
Scientific reports [Sci Rep] 2015 Mar 23; Vol. 5, pp. 9379. Date of Electronic Publication: 2015 Mar 23.
Publication Year :
2015

Abstract

Detonation nanodiamonds (NDs) were deposited on the surface of aligned carbon nanotubes (CNTs) by immersing a CNT array in an aqueous suspension of NDs in dimethylsulfoxide (DMSO). The structure and electronic state of the obtained CNT-ND hybrid material were studied using optical and electron microscopy and Infrared, Raman, X-ray photoelectron and near-edge X-ray absorption fine structure spectroscopy. A non-covalent interaction between NDs and CNT and preservation of vertical orientation of CNTs in the hybrid were revealed. We showed that current-voltage characteristics of the CNT-ND cathode are changed depending on the applied field; below ~3 V/µm they are similar to those of the initial CNT array and at the higher field they are close to the ND behavior. Involvement of the NDs in field emission process resulted in blue luminescence of the hybrid surface at an electric field higher than 3.5 V/µm. Photoluminescence measurements showed that the NDs emit blue-green light, while blue luminescence prevails in the CNT-ND hybrid. The quenching of green luminescence was attributed to a partial removal of oxygen-containing groups from the ND surface as the result of the hybrid synthesis.

Details

Language :
English
ISSN :
2045-2322
Volume :
5
Database :
MEDLINE
Journal :
Scientific reports
Publication Type :
Academic Journal
Accession number :
25797710
Full Text :
https://doi.org/10.1038/srep09379