Development of diamond cathode materials for enhancing the electron field emission and plasma characteristics using two-step microwave plasma enhanced chemical vapor deposition process

2014 ◽  
Vol 32 (2) ◽  
pp. 021202 ◽  
Author(s):  
Shiu-Cheng Lou ◽  
Chulung Chen ◽  
Srinivasu Kunuku ◽  
Keh-Chyang Leou ◽  
Chi-Young Lee ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Field Emission ◽  
Vapor Deposition ◽  
Cathode Materials ◽  
Microwave Plasma ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Electron Field Emission ◽  
Electron Field ◽  
Plasma Characteristics

SYNTHESIS OF GRAPHENE/DIAMOND DOUBLE-LAYERED STRUCTURE FOR IMPROVING ELECTRON FIELD EMISSION PROPERTIES

2016 ◽  
Vol 23 (03) ◽  
pp. 1650011
Author(s):  
YU QIAO ◽  
TING QI ◽  
JIE LIU ◽  
ZHIYONG HE ◽  
SHENGWANG YU ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Field Emission ◽  
Vapor Deposition ◽  
Microwave Plasma ◽  
Composite Films ◽  
Chemical Vapor ◽  
Grazing Incidence ◽  
Electron Field Emission ◽  
Field Emission Properties ◽  
Electron Field

Ultrananocrystalline diamond (UNCD) films on silicon were prepared by microwave plasma chemical vapor deposition (MPCVD) method using argon-rich CH4/H2/Ar plasmas. The graphene sheets synthesized by chemical vapor deposition (CVD) were successfully transferred on to the UNCD surface to fabricate electron field emission (EFE) property-enhanced graphene/UNCD films. The surface morphology, structure and composition of the graphene/UNCD double-layered structures were characterized by scanning electron microscope (SEM), atomic force microscope (AFM), Raman spectroscopy and grazing incidence X-ray diffraction (GXRD). GXRD clearly shows the characteristic diffraction peaks of both diamond and graphene. The Raman spectrum shows the characteristic band of diamond at 1332[Formula: see text]cm[Formula: see text] and D, G and 2D bands of graphene at 1360, 1550 and 2610[Formula: see text]cm[Formula: see text], respectively. The EFE behavior of the composite films can be turned on at [Formula: see text][Formula: see text]V/[Formula: see text]m, attaining a current density of 0.065[Formula: see text]mA/cm2 at an applied field of 7.3[Formula: see text]V/[Formula: see text]m.

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