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Mechanical fabrication of carbon nanotube/TiO 2 nanoparticle composite films and their field‐emission properties
Author(s) -
He KaiXuan,
Su Juan,
Guo DengZhu,
Xing YingJie,
Zhang GengMin
Publication year - 2011
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201084202
Subject(s) - materials science , carbon nanotube , composite number , nanoparticle , fabrication , field electron emission , rubbing , composite material , composite film , nanotechnology , electron , pathology , quantum mechanics , medicine , alternative medicine , physics
A simple mechanical rubbing method for fabricating films of carbon nanotubes (CNTs) and CNTs‐based composite materials is presented, and films of CNTs, TiO 2 nanoparticles, and CNTs‐TiO 2 composite with different proportions are realized. The field emission (FE) properties of these films are systematically studied in comparison experiments. It is found that the TiO 2 films show neglectable FE current in the electrical field up to 10 V/µm, and CNTs‐TiO 2 composite films with an optimum proportion (7–10 wt.%) of TiO 2 nanoparticles exhibit dramatically‐improved FE properties compared with pure CNT films, in lowering turn‐on filed to 1.3 V/µm (CNT films: 2.5 V/µm), suppressing the degradation of FE current, and increasing the FE uniformity and stability. The mechanisms responsible for such improvement are also discussed.