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Amorphous carbon nanoparticles(a-CNPs)on a multi-walled carbon nanotube(MWCNT)film,deposited on a silicon substrate,were synthesized using an electrodeposition combination from a methanol suspension of polydiallyldimethylammonium chloride-modified MWCNTs.A low-voltage electrophoretic deposition of the MWCNTs and a high-voltage electrochemical deposition of the a-CNPs were carried out to yield homogenously attached a-CNPs on the surfaces of the MWCNTs,and form a composite film with good adhesion to the substrate.This scalable technology can produce a large area of a-CNP/MWCNT film.And the field emission investigations show that the a-CNP/MWCNT film has turnon electric field of 3.17V μm~(-1)(at 10 μA cm~(-2)) and threshold field of 4.62 V μm~(-1)(at 1 mA cm~(-2)),which are lower than those of the MWCNT film.The a-CNP/MWCNT film can be deposited simply with large areas and may be a promising cathode material applied in field emission displays.
Amorphous carbon nanoparticles (a-CNPs) on a multi-walled carbon nanotube (MWCNT) film, deposited on a silicon substrate, were synthesized using an electrodeposition combination from a methanol suspension of polydiallyldimethylammonium chloride-modified MWCNTs. A low-voltage electrophoretic deposition of the MWCNTs and a high-voltage electrochemical deposition of the a-CNPs were carried out to yield homogenously attached a-CNPs on the surfaces of the MWCNTs, and form a composite film with good adhesion to the substrate. This scalable technology can produce a large area of a-CNP / MWCNT film. And the field emission investigations show that the a-CNP / MWCNT film has a turnon electric field of 3.17 V μm -1 (at 10 μA cm -2) and threshold field of 4.62 V μm -1 (at 1 mA cm -2), which are lower than those of the MWCNT film. The a-CNP / MWCNT film can be deposited simply with large areas and may be promising cathode material applied in field emission displays.