Field emission characteristics of diamond-like carbon films synthesized by electrodeposition technique

Electrodeposition of diamond-like carbon (DLC) films on Ti

“…During the film deposition from acetonitrile, the current density decreases from 0.9 mA/cm 2 to 0.1 mA/cm 2 in approximately 120 min and then remains constant indicating that the growth rate saturates with time. This is also reported by other authors [10,11,13], even for low potential deposition [14,15], and should be related to the high film resistivity after a monolayer deposition, because the true solid-liquid interface is not anymore a titaniumorganic liquid interface but a DLC film-organic liquid interface. In the first 25 min of the film deposition from DMF, it occurs also a decrease in the current density, which then turns to increase reaching at 16 mA/cm 2 .…”

“…Sreejith et al [11] deposited DLC films from methanol using lower voltages (80-300 V) by decreasing the electrode separation and so increasing the solution conductance, allowing larger current densities to flow. DLC films obtained at low potentials (under 5 V) were presented by Gupta et al [14,15]. The films were deposited onto SnO s -coated glass from solutions composed of acetic acid (0.5% and 1%, v/v) in water at 85 8C.…”

Field emission characteristics of microcrystalline diamond films: Effect of surface coverage and thickness

“…diamond [1][2][3][4], diamond like carbon (DLC) [4,5] and carbon nanostructures [4,6,7] have recently attracted considerable attention for possible replacement of the bulky and inefficient cathode ray tubes. Due to several unique physical and chemical properties like high thermal conductivity (25 Wcm − 1 K − 1 ) [8], large intrinsic breakdown field (10 7 V/cm) [9], chemical inertness and negative electron affinity [10][11][12] etc., diamond films have been shown to be used as flat panel displays, secondary electron emitters, photocathodes [13] for high temperature applications and high voltage operation.…”

Tribological properties of amorphous carbon films obtained by electrodeposition from DMF using 2HEAL protic ionic liquid as dopant

“…This fact is associated with a phenomenon of pref erential polarization, wherein the material is favorably deposited on the substrate inhomogeneities or defects, such as peaks or valleys on the surface. As observed by Zhang [36] and Gupta [37,38], after the nu cleation phase, the carbon nuclei come into a growth phase, and began to thicken the film. As the deposition rate is low, the carbon globules formed were coarse.…”