ZnO quantum dots decorated on optimized carbon nanotube intramolecular junctions exhibit superior field emission properties

RSC Advances ◽  
2016 ◽  
Vol 6 (65) ◽  
pp. 60877-60887 ◽  
Author(s):  
Chia-Te Hu ◽  
Jyh-Ming Wu ◽  
Jien-Wei Yeh ◽  
Han C. Shih
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Zinc Oxide ◽  
Carbon Nanotube ◽  
Quantum Well ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Zno Quantum Dots

Sensitive optical and superior field emission properties can be attained through the use of ZnO selective quantum well heterostructures grown on carbon nanotubes to fabricate carbon-zinc-oxide (CZO) nanotubes.

Improved Field-Emission Properties of Carbon Nanotube Field-Emission Arrays by Controlled Density Growth of Carbon Nanotubes

2005 ◽  
Vol 44 (1A) ◽  
pp. 365-370 ◽  
Author(s):  
Chuan-Ping Juan ◽  
Kuo-Ji Chen ◽  
Chun-Chien Tsai ◽  
Kao-Chao Lin ◽  
Wei-Kai Hong ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Field Emission ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Density Growth ◽  
Field Emission Arrays

Study of Field Emission Behavior of Carbon Nanotubes with Different Sources

2002 ◽  
Vol 728 ◽  
Author(s):  
Mark Ching-Cheng Lin ◽  
M.S. Lai ◽  
H. J. Lai ◽  
M. H. Yang ◽  
B.Y. Wei ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Field Emission ◽  
Arc Discharge ◽  
Metal Catalyst ◽  
Microstructural Investigation ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Different Sources

AbstractThe field emission properties of carbon nanotubes (CNTs) from various sources are investigated for the application of field emission displays. Comparisons are made between graphite with Ni metal as catalyst and polycyclic aromatic hydrocarbon as precursor by the arc discharge method. Cathode deposits are examined using scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HRTEM) to determine microstructure. Carbon structure is studied using Raman spectroscopy. Electron field emission characteristics are measured with the diode method at 10-6 torr pressure. In this study, SEM micrographs of cathode deposits show dense random fiber-like carbon nanotubes. The HRTEM images clearly exhibit characteristic features of multiwalled carbon nanotubes. Microstructural investigation provides evidence that both the metal catalyst and the precursor can be used to synthesize carbon nanotubes. The Raman spectrum shows a stronger peak at about 1580 cm-1 indicating formation of a well-graphitized carbon nanotube. The degree of carbon nanotube graphitization is high and is in good agreement with the HRTEM result. From field emission measurements, the lowest onset field is about 1.0 V/μm and can be attributed to highly sharp tips and the high density of carbon nanotubes. Based on microstructure characterization and field emission measurements, the influence on field emission properties including turn on voltage and threshold voltage of carbon nanotubes synthesized from different sources is discussed.

scholarly journals Field Emission Properties of the Dendritic Carbon Nanotubes Film Embedded with ZnO Quantum Dots

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Shu Zuo ◽  
Xin Li ◽  
Weihua Liu ◽  
Yongning He ◽  
Zhihao Xiao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Quantum Dots ◽  
Zinc Oxide ◽  
Field Emission ◽  
Dendritic Structure ◽  
Emission Current ◽  
Field Emission Properties ◽  
Field Emission Current ◽  
New Type ◽  
The Common

Response on the effects of individual differences of common carbon nanotubes on the field emission current stability and the luminescence uniformity of cathode film, a new type of cathode film made of dendritic carbon nanotubes embedded with Zinc oxide quantum dots is proposed. The film of dendritic carbon nanotubes was synthesized through high-temperature pyrolysis of iron phthalocyanine on a silicon substrate coated with zinc oxide nanoparticles. The dendritic structure looks like many small branches protrude from the main branches in SEM and TEM images, and both the branch and the trunk are embedded with Zinc oxide quantum dots. The turn-on field of the dendritic structure film is∼1.3 V/μm at a current of 2 μA, which is much lower than that of the common carbon nanotube film, and the emission current and the luminescence uniformity are better than that of the common one. The whole film emission uniformity has been improved because the multi-emission sites out from the dendritic structure carbon nanotubes cover up the failure and defects of the single emission site.

Field Emission Properties of Carbon Nanotubes Synthesized by High Temperature Arc Method and Low Temperature CVD Method

2003 ◽  
Vol 772 ◽  
Author(s):  
Hong-Jen Lai ◽  
Sheng-Chin Kung ◽  
Chih-Ming Hsu ◽  
Bean-Jon Li ◽  
Ching-Cheng Lin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
High Temperature ◽  
Carbon Nanotube ◽  
Low Temperature ◽  
Field Emission ◽  
Layer Structure ◽  
Emission Measurement ◽  
Emission Properties ◽  
Field Emission Properties ◽  
Graphitic Layer

AbstractThe microstructure and field emission properties of multi walled carbon nanotubes (MWNTs) were investigated. The comparisons are made between MWNTs synthesized by high temperature arc methods and low temperature CVD methods. The results of the HRTEM image clearly exhibit characteristic features of a multi walled carbon nanotube. Raman spectrum shows a stronger peak at about 1580 cm-1 indicating the formation of a well-graphitized carbon nanotube. It also shows the high temperature arc process can produce MWNT that has perfect graphitic layer structure and high I(G)/I(D) ratio. The Ratio of G-line (sp2 bond) and D-line(sp3 bond) of these MWNTs are about 2.8 to 5.2. From the field emission measurement, the low onset field is about 1.4 to 2.4 V/ m, and can be attributed to highly sharp tips and high electric conductivity of MWNTs.

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

Electronic Structure and Field‐Emission Properties of Nitrogen‐Doped Carbon Nanotubes

2006 ◽  
Vol 14 (2-3) ◽  
pp. 151-164 ◽  
Author(s):  
A. V. Okotrub ◽  
L. G. Bulusheva ◽  
V. V. Belavin ◽  
A. G. Kudashov ◽  
A. V. Gusel'nikov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Field Emission ◽  
Emission Properties ◽  
Nitrogen Doped ◽  
Field Emission Properties ◽  
Nitrogen Doped Carbon
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