Fabrication and Field Emission Properties of Poly-CuTAPc Nanowires and Nanotubes

2009 ◽  
Vol 62 (9) ◽  
pp. 1007 ◽  
Author(s):  
Feng Gu ◽  
Chorng Haur Sow ◽  
Guo Qin Xu ◽  
Siau Gek Ang
Keyword(s):  
Field Emission ◽  
Enhancement Factor ◽  
Monomer Concentration ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Maximum Current Density ◽  
Turn On ◽  
Field Emitters ◽  
Maximum Current ◽  
Organic Nanomaterials

Poly-copper tetraaminophthalocyanine (CuTAPc) nanowires and nanotubes were successfully fabricated on porous anodic aluminium oxide (AAO) templates by electropolymerization and characterized. The product of electropolymerization, whether as nanowires or nanotubes, is a function of the monomer concentration and template pore size. The morphology and field emission properties of these nanostructures were studied for investigation of potential application as field emitters. They show interesting turn-on field, maximum current density and enhancement factor, comparable to many other organic nanomaterials.

Enhanced Field Emission Properties of Carbon Nanotube Based Field Emitters by Dynamic Oxidation

2013 ◽  
Vol 9 (5) ◽  
pp. 619-623 ◽  
Author(s):  
Shama Parveen ◽  
Samina Husain ◽  
Avshish Kumar ◽  
Javid Ali ◽  
Mubashshir Husain ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emitters ◽  
Dynamic Oxidation

The Field Emission of Globe-Like Diamond Microcrystalline Aggregate Films

2011 ◽  
Vol 279 ◽  
pp. 88-92
Author(s):  
Jin Hai Gao ◽  
Wu Qing Zhang ◽  
Zhen Li
Keyword(s):  
Field Emission ◽  
Electric Fields ◽  
Current Density ◽  
Microwave Plasma ◽  
Chemical Vapor ◽  
Chemical Vapor Deposition Method ◽  
Emission Properties ◽  
Plasma Chemical Vapor Deposition ◽  
Field Emission Properties ◽  
Turn On

The globe-like diamond microcrystalline aggregates films were fabricated by microwave plasma chemical vapor deposition method. The field emission properties and emission stability of the films were tested using a diode structure in vacuum. It was found that the globe-like diamond microcrystalline aggregates films exhibited good electron emission properties and stability. The turn-on field of 0. 55 V /μm and the current density of 11mA/cm2 at the electric fields of 2.73V/μm were obtained. At the successive operator circles, the turn-on field tends to stabilize at 1. 08V /μm and the current density of 6.6 mA/cm2 is obtained.

scholarly journals Field Emission Properties of the Graphene Double-Walled Carbon Nanotube Hybrid Films Prepared by Vacuum Filtration and Screen Printing

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Jinzhuo Xu ◽  
Tao Feng ◽  
Yiwei Chen ◽  
Zhuo Sun
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Electron Emission ◽  
Screen Printing ◽  
Weight Ratio ◽  
Hybrid Films ◽  
Vacuum Filtration ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Turn On

The graphene double-walled carbon nanotube (DWCNT) hybrid films were prepared by vacuum filtration and screen printing. Their electron field emission properties have been studied systematically. The electron emission properties of the hybrid films are much better than those of pure DWCNT films and pure graphene films. Comparing with the screen printed films, the vacuum filtered films have many advantages, such as lower turn-on field, higher emission current density, better uniformity, better long-term stability, and stronger adhesive strength with conductive substrates. The optimized hybrid films with 20% weight ratio of graphene, which were fabricated by vacuum filtration, show the best electron emission performances with a low turn-on field of 0.50 Vμm−1(at 1 μAcm−2) and a high field enhancement factorβof 27000.

ZnO Nanostructures and Field Emission Properties on Cu Substrate Achieved by Electrodeposition Method

2011 ◽  
Vol 347-353 ◽  
pp. 3388-3391
Author(s):  
Jiang Feng Gong ◽  
Chang Yong Lan ◽  
Bo Zhang ◽  
Kai Xiao Zhang ◽  
Wei Hua Zhu
Keyword(s):  
Electron Microscopy ◽  
Field Emission ◽  
Growth Conditions ◽  
Zno Nanostructures ◽  
Emission Properties ◽  
Electrodeposition Method ◽  
Field Emission Properties ◽  
Field Emitters ◽  
Transmission Electron ◽  
Cu Substrates

In the present work, ZnO nanostructures with tunable size were successfully synthesized on non-seeded Cu substrates by a simple electrodeposition method. The effects of growth conditions on the morphology of the products were studied in detail by scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The as-prepared products exhibited flake-like morphology when the concentration of ZnCl2 was higher enough, while the products showed flower-like morphology when the concentration was lower enough. Field emission investigation indicated that the nanoflowers exhibited good emission properties. The ZnO nanoflowers show potential application as field emitters.

Synthesis of Carbon–Nitrogen Nanostructures by Hot Isostatic Pressure Apparatus and Their Field Emission Properties

2007 ◽  
Vol 7 (2) ◽  
pp. 570-574
Author(s):  
Yang Doo Lee ◽  
V. D. Blank ◽  
D. V. Batov ◽  
S. G. Buga ◽  
Yun-Hi Lee ◽  
...  
Keyword(s):  
Field Emission ◽  
Field Enhancement ◽  
Glass Frit ◽  
Gas Mixture ◽  
Nitrogen Gas ◽  
Field Emission Properties ◽  
Turn On ◽  
Field Emitters ◽  
Enhancement Factors ◽  
Resistive Heater

Carbon–nitrogen (CN) nanofibers were synthesized in argon–nitrogen gas mixture at 75 MPa by high isostatic pressure (HIP) apparatus using a graphite resistive heater. The CN nanofibers were grown in random with the diameter of about 200 nm and the length over 5 μm. The structures obtained can be divided bamboo-like, spring-like, and bead necklace-like CN nanofibers. The nitrogen content of up to 8.4% was found in CN nanofibers by EELS analysis. Field emission results showed that the density of field emitters and the field enhancement factors changed by surface treatments and that CN nanofibers contained glass frit. The screen-printed CN nanofiber had a turn-on field of 2 V/μm.

scholarly journals Excellent field emission properties from carbon nanotube field emitters fabricated using a filtration-taping method

2014 ◽  
Vol 15 (3) ◽  
pp. 214-217 ◽  
Author(s):  
Dong Hoon Shin ◽  
Seung Jung ◽  
Ki Nam Yun ◽  
Guohai Chen ◽  
Seok-Gy Jeon ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emitters

Effect of Ar-ion Irradiation on the Field-emission Properties of Screen-printed Carbon-nanotube Field Emitters

2015 ◽  
Vol 65 (2) ◽  
pp. 116-120
Author(s):  
Chang-Duk KIM* ◽  
Hong Tak KIM ◽  
Sung-Youp LEE ◽  
Kiwon YANG ◽  
Hyeong-Rag LEE
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Ion Irradiation ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Field Emitters ◽  
Screen Printed

Controlled Synthesis and Field Emission Properties of ZnO Nanostructures with Different Morphologies

2006 ◽  
Vol 6 (3) ◽  
pp. 787-790 ◽  
Author(s):  
Y. H. Huang ◽  
Y. Zhang ◽  
L. Liu ◽  
S. S. Fan ◽  
Y. Wei ◽  
...  
Keyword(s):  
Field Emission ◽  
Zinc Powder ◽  
Emission Current ◽  
Controlled Synthesis ◽  
Zno Nanostructures ◽  
Pure Zinc ◽  
Field Emitter ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Turn On

By simply controlling atmosphere, rods, tetraleg-rods, and arrays of ZnO nanostructures have been fabricated respectively through pure zinc powder evaporation without catalyst at temperature of 650 &sim 700 °C. Investigations through HRTEM and XRD showed that the growth of the synthesized ZnO nanostructures was controlled by vapor-solid mechanism. Field emission measurements revealed that all of the structures, owing to their very low turn-on voltage, sufficient emission current and proper linearity of 1/V ∼ Ln(I/V2), are likely to be potential candidates as a field emitter. The results also indicated that field emission properties are relative to morphology and size of the tips of ZnO nanostructures, and the nanorods with sharp tips possess the first-class FE property.

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