Abstract
We present a scalable, reproducible and economic process for the fabrication of diamond and diamond-graphene hybrid films using paraffin wax as a seeding source for diamond. The films were characterized using Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and electron energy loss spectroscopy (EELS). Raman spectra show the characteristic band of diamond at 1332 cm-1 and the D, G, and 2D bands of graphene at 1360, 1582 and 2709 cm-1, respectively. Electron microscopy confirms the microcrystalline nature of the diamond films with crystal size in the range of 0.5 μm to 1.0 μm, and the hybrid film consists of microcrystalline diamond attached to thin, semi-transparent graphene flakes. The graphene-diamond hybrid films exhibit a turn-on field of about 3.6 V/μm with a prolonged current stability of at least 135 h.
Highlights
IntroductionThe exceptional properties (e.g. high thermal conductivity, high strength, and lowest compressibility) of diamond make it an ideal material for many applications, such as in cutting tools, coatings for magnetic disks, optical switches [1], electronic devices [2], spintronics devices, and quantum computational components [3] and more
The exceptional properties of diamond make it an ideal material for many applications, such as in cutting tools, coatings for magnetic disks, optical switches [1], electronic devices [2], spintronics devices, and quantum computational components [3] and more
The First, The paraffin wax crystallites act as nucleation sites for diamond growth in the presence of hydro-carbon radicals and atomic hydrogen in the CVD system
Summary
The exceptional properties (e.g. high thermal conductivity, high strength, and lowest compressibility) of diamond make it an ideal material for many applications, such as in cutting tools, coatings for magnetic disks, optical switches [1], electronic devices [2], spintronics devices, and quantum computational components [3] and more. The field emission properties of diamond [12], amorphous carbon [13], and vertically aligned multi- and single-walled carbon nanotubes [14,15] for cold cathode applications have been extensively investigated but the field emission properties of graphene films have only been reported very recently [16,17]. These studies on the field emission from various carbon materials focused on the importance of the field enhancement factor according to the morphological and topographical structure of the cathode surface. The excellent electrical and thermal properties of graphene and diamond respectively can be combined into one hybrid material for advanced applications
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