tailieunhanh - Hot filament CVD growth of vertically aligned carbon nanotubes on support materials for field electron emitters

In this work, we report a direct growth of the VACNTs on several substrates by using hot-filament chemical vapor deposition (hot-filament CVD) and a catalytic buffer-layer structure. The buffer layer was the aluminum (Al) thin film used together with iron (Fe) as the catalyst. | VNU Journal of Science Mathematics Physics Vol. 36 No. 2 2020 98-105 Original Article Hot-filament CVD Growth of Vertically-aligned Carbon Nanotubes on Support Materials for Field Electron Emitters Nguyen Thanh Hai Dang Nhat Minh Do Nhat Minh Nguyen Dinh Dung Luong Nhu Hai Phan Ngoc Hong Nguyen Tuan Hong Center for High Technology Development Vietnam Academy of Science and Technology 18 Hoang Quoc Viet Hanoi Vietnam Received 03 March 2020 Revised 11 April 2020 Accepted 06 April 2020 Abstract Carbon nanotubes are used in different applications such as energy storages electronic devices. For these applications a direct assembly of the vertically-aligned carbon nanotubes VACNTs on electrically conducting substrates is of interest. In this work we report a direct growth of the VACNTs on several substrates by using hot-filament chemical vapor deposition hot-filament CVD and a catalytic buffer-layer structure. The buffer layer was the aluminum Al thin film used together with iron Fe as the catalyst. It was found that the Al underneath layer was necessary for obtaining the VACNT forests with high purity and good contact. The as-fabricated VACNT support-material structures are of the object to test field electron emission properties. Characterization results of the VACNT samples demonstrated a promising application for the field emission in terms of the high emitting currents. Keywords Carbon nanotubes hot-filament CVD field electron emission catalysis. 1. Introduction Carbon nanotubes have potential applications including interconnects for supercapacitors fuel cells electron emitting devices 1-5 . For these applications a direct assembly of the vertically-aligned carbon nanotubes VACNTs on electrically conducting substrates is mostly needed. The most obvious method to obtain such structures is the direct growth of the carbon nanotubes on conducting substrates. In recent years the VACNT synthesis has significantly advanced. Key points have been attributed to not only .

• Toán học
• Carbon nanotubes
• Hot filament CVD
• Field electron emission
• The vertically aligned carbon nanotubes
• The aluminum
• Applications of carbon nanotubes in automobiles
• Carbon nanotubes in automobiles
• Carbon Nanotubes shall
• The basis for weight reduction
• Fuel component systems particularly
• Single wall carbon nanotubes
• Multi wall carbon nanotubes
• Arc discharge
• Chemical vapour deposition
• Laser ablation
• Vietnam Journal of Science and Technology
• Comparison of oxidized carbon nanotubes efficiencies
• Oxidized carbon nanotubes efficiencies
• Toluene removal from aqueous solution
• Three oxidized MWCNTs
• Journal of Science and Technology
• Hybrid materials based on carbon nanotubes
• Photocatalytic properties of hybrid materials
• Carbon nanotubes based hybrid
• Vietnam Journal of Mechanics
• Buckling of double walled carbon nanotubes
• Double walled carbon nanotubes
• The finite difference method
• Clamped free double walled
• Growth mechanisms of single wall carbon nanotubes
• Chemical vapor deposition (CVD) process on Fe Mo Al catalyst
• Fe Mo Al catalyst
• Single walled carbon nanotubes
• Transmission electron microscopy
• Strategy for chemically attachment
• Multi walled Carbon Nanotubes surfaces
• Carboxy Multi Walled Carbon Nanotubes
• Solution blending technique
• DC electrical conductivity
• Gas sensor
• In situ fabrication of SnO2 nanowires
• Carbon nanotubes heterojunctions based
• NO2 gas sensors
• Advanced materials and devices
• Composites made from networked carbon nanotubes
• Barrier driven strain sensing
• Poisson's ratio
• Nickel based multiwalled carbon nanotube composite coatings
• Multi walled carbon nanotubes
• The Nickel electrodeposition coatings containing MWCNTs
• Communications in Physics
• Thermodynamic equivalent between non interacting
• Fermi gas in metallic carbon nanotubes
• The gas systems of exciton photon
• Metallic carbon nanotubes
• Ab initio
• Artificial muscle
• Density functional theory
• Equilibrium modeling
• Competitive adsorption
• Competitive adsorption of phenol
• Nickel onto multiwalled carbon nanotubes
• Medicinal Chemistry
• Pharmacological Potential
• Carbon Nanoparticles
• Photodynamic Therapy
• Carbon nanotube
• Ethylene glycol
• Thermal conductivity
• Carbon nanotubes with ethylene glycol
• Water based nanofluids
• Vibration of sandwich beams reinforced
• Carbon nanotubes under a moving load
• Carbon nanotube reinforcement
• Third order shear deformation theory
• Four different types of functionally graded
• Coiled carbon nanotubes
• Coiled carbon nanofibers
• Carbon coil
• Carbon helix
• Helical morphology
• báo cáo khoa học
• báo cáo hóa học
• công trình nghiên cứu về hóa học
• tài liệu về hóa học
• cách trình bày báo cáo
• Simple Tension
• Structural Mechanics
• Element Method
• Synthesis
• Atomic Structures
• Organic chemistry
• Study on preparation
• Rrubber nanocomposites material
• Polymer substrate
• Dissertation summary
• Ceramic Al2O3 coating applied
• Air plasma spray
• The carbon nanotubes
• The Al2O3 coating
• The CNTs Al2O3 one
• Hydroxyapatite functionalized carbon nanotubes
• HAp and CNTs
• HAp fCNTs nanocomposite
• The presence of fCNTs in HAp coatings
• Fabricate the large scale buckypaper based on carbon nanotubes
• Large scale CNTs buckypaper
• Tạp chí hóa học
• Carbon nanotubes reinforced Al2O3 coating
• Electrochemical impedance spectroscopy
• Erosion corrosion tests
• Ceramic Al2O3 coating