FABRICATION OF ELECTRON FIELD EMITTERS USING CARBON NANOTUBES

2000 ◽  
Vol 10 (01) ◽  
pp. 5-11
Author(s):  
YOUNG CHUL CHOI ◽  
YOUNG SOO PARK ◽  
YOUNG HEE LEE ◽  
WON BONG CHOI ◽  
NAE SUNG LEE ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Field Enhancement ◽  
Chemical Vapor ◽  
Large Field ◽  
Single Wall Carbon Nanotubes ◽  
Uniform Field ◽  
Large Area ◽  
Entire Area ◽  
Glass Substrates

Carbon nanotube (CNT)-based field emission displays (FEDs) have been fabricated using well-aligned nanotubes on substrates in situ grown by thermal chemical vapor deposition (CVD), and paste squeeze and surface rubbing techniques. Although the former seems to be an ultimate approach for CNT-based FED, a large area synthesis and uniform field emission over the entire area is not yet easily accessible. On the other hand, the latter is fully scalable on glass substrates and shows very high luminance of 1800 cd/m2 at 4 V/μm. The degradation of emission currents for single-wall carbon nanotubes was less than 10% in electrical aging tests. Large field-enhancement factors (23,000–46,000) and low turn-on voltages (1.5-3 V/μm) were attributed to well-aligned carbon nanotubes on substrates and a large number density of carbon nanotubes of 5-10 μm-2, which was confirmed by high-resolution scanning electron microscopy.

Large-Area Deposition of Carbon Nanotubes for Field Emission Displays

2001 ◽  
Vol 706 ◽  
Author(s):  
Young-Jun Park ◽  
In-Taek Han ◽  
Ha-Jin Kim ◽  
Yun-Sung Woo ◽  
Nae-Sung Lee ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Electric Fields ◽  
Direct Synthesis ◽  
Chemical Vapor ◽  
Large Area ◽  
Glass Substrates ◽  
Field Emission Displays ◽  
Area Deposition ◽  
Catalytic Layers

AbstractA direct synthesis of carbon nanotubes (CNTs) on substrates by chemical vapor deposition (CVD) is one of highly probable routes to reach their application to field emission displays. Several stringent requirements are prerequisite for this purpose, including low temperature growth below 600°C to engage glass substrates and large area deposition for practical use. This study carried out synthesis of CNTs by thermal CVD on glass substrates at temperatures as low as 500~550°C. CNTs were grown by thermal decomposition of CO and H2 gases at an atmospheric pressure for different thickness of Invar (an Fe-Ni-Co alloy ) catalytic layers. The growth of CNTs was strongly correlated with preparation of catalytic layers. The diameters and heights of as-grown CNTs increased as the catalytic layers became thicker from 2nm to 30nm. Measurements of the field emission properties of CNTs showed that the threshold electric fields were lowered with increasing thickness of catalytic layers. A uniform electron emission was observed over a large area of 150 × 150mm2, with high emission currents and high brightness.

Large field emission from carbon nanotubes grown on patterned catalyst thin film by thermal chemical vapor deposition

2002 ◽  
Vol 323 (1-4) ◽  
pp. 171-173 ◽  
Author(s):  
Takashi Ikuno ◽  
Tetsuro Yamamoto ◽  
Motoki Kamizono ◽  
Syunji Takahashi ◽  
Hiroshi Furuta ◽  
...  
Keyword(s):  
Thin Film ◽  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Field Emission ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Large Field ◽  
Thermal Chemical Vapor Deposition

GROWTH OF CARBON NANOTUBES ON THE GLASS SUBSTRATE FOR FLAT PANEL DISPLAY APPLICATIONS

2002 ◽  
Vol 16 (06n07) ◽  
pp. 979-982 ◽  
Author(s):  
JAEMYUNG KIM ◽  
KWANGSOO NO
Keyword(s):  
Carbon Nanotubes ◽  
Current Density ◽  
Chemical Vapor ◽  
Soda Lime ◽  
Emission Current Density ◽  
Emission Current ◽  
Soda Lime Glass ◽  
Flat Panel Display ◽  
Large Area ◽  
Glass Substrates

We have grown carbon nanotubes (CNTs) on the soda-lime glass substrates using chemical vapor deposition of C 2 H 2 gas at 550°C. We used electro-plated Ni thin film as a catalyst and screen-printed Ag thick film as a cathode. The turn-on field was about 2.55 V /μ m with an emission current density of 10 μ A / cm 2, and electric field was about 4.0 V /μ m with an emission current density of 3 mA/cm2. Fowler-Nordheim plot shows good linear fit, indicating that the emission current of CNTs follows the Fowler-Nordheim behavior. This process is suitable for mass production of CNT field emission display(CNT-FED), because of its merits; low temperature (≤ 550° C ) process, easiness of CNT patterning, non-vacuum process, large area uniformity.

Large-Area Single Wall Carbon Nanotubes:  Synthesis, Characterization, and Electron Field Emission

2007 ◽  
Vol 111 (4) ◽  
pp. 1601-1604 ◽  
Author(s):  
Yu H. Yang ◽  
Chih Y. Wang ◽  
Uei S. Chen ◽  
Wei J. Hsieh ◽  
Yee S. Chang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Single Wall Carbon Nanotubes ◽  
Electron Field Emission ◽  
Large Area ◽  
Single Wall Carbon ◽  
Electron Field

Large Area Graphene on Polymer Films for Transparent and Flexible Field Emission Device

2011 ◽  
Vol 1283 ◽  
Author(s):  
Ved Prakash Verma ◽  
Santanu Das ◽  
Indranil Lahiri ◽  
WonBong Choi
Keyword(s):  
Field Emission ◽  
Large Scale ◽  
High Current Density ◽  
Field Enhancement ◽  
Chemical Vapor ◽  
Display Device ◽  
Large Area ◽  
Field Emission Display ◽  
Flexible Polymer ◽  
Wide Range

ABSTRACTLarge scale fabrication of graphene over transparent flexible polymer, Polyethelyne tetrapthalate (PET), and its application in flexible field emission display is reported here. We used Cu foil (~160 mm x 60 mm) to grow graphene by thermal chemical vapor deposition process and transfer the graphene over a polymer using a straightforward hot press lamination technique. The fabrication method is facile as there is no rigorous chemical process involved and the process is also applicable towards the fabrication of large scale graphene over a wide range of transparent flexible substrates for foldable micro-electronics applications. Further, we demonstrate the application of graphene/PET polymer film as anode of transparent flexible field emission display device. The device shows low turn-on voltage ~ 1.75V/μm and high current density of ~ 65μA/cm2 with field enhancement factor (β) ~1000.

Field emission characteristics of carbon nanotubes synthesized by C3H4 and NH3 gases

2002 ◽  
Vol 727 ◽  
Author(s):  
Taewon Jeong ◽  
Jae Hee Han ◽  
Whikun Yi ◽  
SeGi Yu ◽  
Jeonghee Lee ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Field Emission ◽  
Gas Flow ◽  
Field Enhancement ◽  
Chemical Vapor ◽  
Emission Characteristics ◽  
Flow Ratio ◽  
Multiwalled Carbon ◽  
Turn On ◽  
Gas Flow Ratio

AbstractUsing a gas mixture of propyne (C3H4) and ammonia (NH3) as a carbon precursor, we have successfully synthesized multiwalled carbon nanotubes (CNTs) by the direct current (dc) plasma enhanced chemical vapor deposition (PECVD) onto Co-sputtered glass at 550°C. As the flow ratio of NH3 to C3H4 in the mixture gas increased, the crystallinity and alignment of CNTs were improved. In addition, the field emission characteristics of CNTs were also improved. the turn-on voltage became lower, and the current density and the field enhancement factor were more increasing. Raman spectroscopy and scanning electron microscopy were utilized to confirm the effect of the gas flow ratio on CNTs. Therefore, the gas flow ratio was found to be one of important factors to govern the crystalline and field emission characteristics of CNTs. The growth mechanism of CNTs using a C3H4 gas is under investigation with the possibility that three carbon atoms in a C3H4 molecule is converted directly to a hexagon of a CNT by combining two molecules.

Direct Growth of Single Walled Carbon Nanotubes for the Characterization of Structural and Electronic Properties

2008 ◽  
Vol 1081 ◽  
Author(s):  
Jianfeng Wu ◽  
Joel Walenza-Slabe ◽  
Timothy Gutu ◽  
Jun Jiao
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Electronic Properties ◽  
Metal Contamination ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Target Area ◽  
Large Area

ABSTRACTFabricating horizontally aligned single wall carbon nanotubes (CNTs) with controlled properties has been one of the significant challenges for field-effect transistor (FET) applications. This report demonstrates a novel procedure for the fabrication of horizontally aligned single walled CNTs using the focused ion beam (FIB) and chemical vapor deposition (CVD). This method allows the morphologies, internal structures, and elemental compositions of CNTs to be directly analyzed in the scanning electron microscope (SEM) and transmission electron microscope (TEM) and avoids any sample preparation procedures that might alter the structure of the CNTs. The techniques of electron beam and ion beam induced deposition (EBID and IBID) of Pt electrodes to the CNT ends were compared and both were found to produce metal contamination around the target area. The fabrication of large area electrodes to assist in testing the CNT's electronic properties, including contact resistance and I-V characteristics was investigated. Using this fabrication technique we were able to perform an I-V sweep on a CNT circuit as well as detect the metal contamination on the CNTs which occurred as a result of electrode deposition.

CONTROLLABLE CHEMICAL VAPOR DEPOSITION SYNTHESIS OF SINGLE-WALL CARBON NANOTUBES USING MIST FLOW METHOD

NANO ◽  
2012 ◽  
Vol 07 (06) ◽  
pp. 1250045 ◽  
Author(s):  
YUN SUN ◽  
RYO KITAURA ◽  
TAKUYA NAKAYAMA ◽  
YASUMITSU MIYATA ◽  
HISANORI SHINOHARA
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Single Wall Carbon Nanotubes ◽  
Flow Method ◽  
Mist Flow ◽  
Mean Diameter ◽  
The Mean

The influences of synthesis parameters on the mean diameter and diameter distribution of as-grown single-wall carbon nanotubes (SWCNTs) with chemical vapor deposition (CVD) using the mist flow method have been investigated in detail with Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). We found that CVD reaction temperature and flow rate play an essential role in controlling the mean diameter and the quality of as-grown SWCNTs. Furthermore, we found that the carbon supply kinetics can be a dominant factor to determine the diameter of as-grown SWCNTs in the present mist flow method. Under a different combination of various parameters, the mean diameter of SWCNTs can be varied from 0.9 nm to 1.5 nm controllably.

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