scholarly journals Enhanced Field Emission of Single-Wall Carbon Nanotube Cathode Prepared by Screen Printing with a Silver Paste Buffer Layer

Nanomaterials ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 165
Author(s):  
Ruirui Jiang ◽  
Jianlong Liu ◽  
Kaiqiang Yang ◽  
Jing Zhao ◽  
Baoqing Zeng
Keyword(s):  
Carbon Nanotube ◽  
Buffer Layer ◽  
Field Emission ◽  
Screen Printing ◽  
Emission Current ◽  
Operating Voltage ◽  
Single Wall Carbon Nanotube ◽  
Silver Paste ◽  
Single Wall Carbon ◽  
Screen Printed

A high emission current with relatively low operating voltage is critical for field emission cathodes in vacuum electronic devices (VEDs). This paper studied the field emission performance of single-wall carbon nanotube (SWCNT) cold cathodes prepared by screen printing with a silver paste buffer layer. The buffer layer can both enforce the adhesion between the SWCNTs and substrate, and decrease their contact resistance, so as to increase emission current. Compared with paste mixing CNTs and screen printed cathodes, the buffer layer can avoid excessive wrapping of CNTs in the silver slurry and increase effective emission area to reduce the operating voltage. The experimental results show that the turn-on field of the screen-printed SWCNT cathodes is 0.9 V/μm, which is lower than that of electrophoretic SWCNT cathodes at 2.0 V/μm. Meanwhile, the maximum emission current of the screen-printed SWCNT cathodes reaches 5.55 mA at DC mode and reaches 10.4 mA at pulse mode, which is an order magnitude higher than that of electrophoretic SWCNTs emitters. This study also shows the application insight of small or medium-power VEDs.

Field emission from single-wall carbon nanotube films

1998 ◽  
Vol 73 (7) ◽  
pp. 918-920 ◽  
Author(s):  
Jean-Marc Bonard ◽  
Jean-Paul Salvetat ◽  
Thomas Stöckli ◽  
Walt A. de Heer ◽  
László Forró ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Nanotube Films

Current degradation mechanism of single wall carbon nanotube emitters during field emission

2006 ◽  
Vol 89 (25) ◽  
pp. 253115 ◽  
Author(s):  
J. H. Lee ◽  
S. H. Lee ◽  
W. S. Kim ◽  
H. J. Lee ◽  
J. N. Heo ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Degradation Mechanism ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon

Field Emission Characteristics of Single Wall Carbon Nanotube Rope at The Presence of Dielectric Medium

2013 ◽  
Vol 34 (7) ◽  
pp. 882-887
Author(s):  
高见 GAO Jian ◽  
佟钰 TONG Yu ◽  
夏枫 XIA Feng ◽  
刘俊秀 LIU Jun-xiu ◽  
曾尤 ZENG You
Keyword(s):  
Carbon Nanotube ◽  
Field Emission ◽  
Dielectric Medium ◽  
Emission Characteristics ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon

scholarly journals Electrochemical Characterization and Determination of Phenol and Chlorophenols by Voltammetry at Single Wall Carbon Nanotube/Poly(3,4-ethylenedioxythiophene) Modified Screen Printed Carbon Electrode

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Negussie Negash ◽  
Hailemichael Alemu ◽  
Merid Tessema
Keyword(s):  
Carbon Nanotube ◽  
Phenolic Compounds ◽  
Dynamic Range ◽  
Carbon Electrode ◽  
Single Wall Carbon Nanotube ◽  
Single Wall Carbon ◽  
Screen Printed Carbon Electrode ◽  
Electrode Characteristics ◽  
Screen Printed

Screen printed carbon electrode (SPCE) has been modified with single wall carbon nanotube/poly(3,4-ethylenedioxythiophene) (SWCNT/PEDOT) composites for the determination of phenol and chlorophenols (phenol, 4-chlorophenol, 2,4-dichlorophenol, and 2,4,6-trichlorophenol). The effect of the modifiers on the electrode characteristics was evaluated and the responses were optimized for the voltammetric determination of phenol and chlorophenols. The parameters affecting the responses such as pH, scan rate, and stability were studied. The analytical performance of the SWCNT/PEDOT/SPCE using cyclic voltammetry was tested and found to be impressive. Under these conditions, the designed electrode showed a good performance for the voltammetric measurements of the phenolic compounds. The modified SPCE, when it is compared with other enzymatic and nonenzymatic sensors, showed a wider dynamic range for the detection of the phenolic compounds. The modified SPCE was used for the quantification of phenol in water samples. The results suggest that the method is quite useful for analyzing and monitoring phenols and chlorophenols.

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