STRAIN-INDUCED RESISTANCE CHANGES OF CARBON NANOTUBE FILMS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 627-629 ◽  
Author(s):  
J. W. LU ◽  
W. L. WANG ◽  
K. J. LIAO ◽  
B. Y. WAN
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Induced Resistance ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Resistance Change ◽  
Piezoresistive Effect ◽  
Hot Filament ◽  
Relative Change ◽  
Nanotube Films

The strain-induced resistance changes of both SWNT and MWNT films have been studied. Carbon nanotubes in this study were synthesized by hot filament chemical vapor deposition. Experimental results showed that there is a striking piezoresistive effect in carbon nanotube films. The relative change in resistance of carbon nanotube films was increased with the increasing strain. In the same strain, the resistance changes of SWNT films exceed that of MWNT films. The origin of the resistance change in the films may be caused by strain-induced change in the bandgap and intertube contact resistance.

SEEBECK EFFECT IN CARBON NANOTUBE FILMS

2005 ◽  
Vol 19 (01n03) ◽  
pp. 643-645 ◽  
Author(s):  
B. Y. WAN ◽  
W. L. WANG ◽  
K. J. LIAO ◽  
J. W. LV
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Seebeck Effect ◽  
Thermoelectromotive Force ◽  
Hot Filament ◽  
Nanotube Films

In this paper, the Seebeck effect of mutilwalled carbon nanotube films has been studied. The carbon nanotubes were synthesized by hot filament chemical vapor deposition using Ni - Fe as a catalyst. It was found that the thermoelectromotive force (thermo emf) changed approximately linearly with the temperature at the hot end at room temperature, and the Seebeck coefficient of carbon nanotube films was about 10~50 μv/k. The experimental results were discussed in detail.

Study on Piezoresistive of Doped Carbon Nanotube Films

2005 ◽  
Vol 23 ◽  
pp. 309-312 ◽  
Author(s):  
W.L. Wang ◽  
K.J. Liao ◽  
C. Cai ◽  
C.G. Hu ◽  
Y. Ma ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polycrystalline Silicon ◽  
Room Temperature ◽  
Chemical Vapor ◽  
Bending Test ◽  
Gauge Factor ◽  
Piezoresistive Effect ◽  
Three Point Bending ◽  
Hot Filament ◽  
Nanotube Films

The piezoresistive effect in iodine-doped carbon nanotube films was investigated by a three-point bending test. Carbon nanotubes were synthesized by hot filament chemical vapor deposition. The experimental results showed that the gauge factor for I-doped and undoped carbon nanotube films under 500 microstrain was about 350 and 65 respectively at room temperature, exceeding that of polycrystalline silicon (30) at 35°C. The origin of the piezoresistivity in the films may be ascribed to a strain-induced change in the band gap for the doped tubes and the intertube contact resistance and defects for the undoped tubes.

scholarly journals Field Emission Properties of Vertically-Aligned Carbon Nanotubes Grown on Stainless Steel by Hot-Filament Chemical Vapor Deposition

2020 ◽  
Vol 61 (8) ◽  
pp. 1555-1559
Author(s):  
Nguyen Khac Hiep ◽  
Dang Nhat Minh ◽  
Nguyen Thanh Hai ◽  
Nguyen Dinh Dung ◽  
Luong Nhu Hai ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Stainless Steel ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Vertically Aligned Carbon Nanotubes ◽  
Field Emission Properties ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned ◽  
Hot Filament

scholarly journals Laterally organized carbon nanotube arrays based on hot-filament chemical vapor deposition

2011 ◽  
Vol 519 (14) ◽  
pp. 4598-4602 ◽  
Author(s):  
Ki-Hwan Kim ◽  
Emmanuel Lefeuvre ◽  
Marc Châtelet ◽  
Didier Pribat ◽  
Costel Sorin Cojocaru
Keyword(s):  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Nanotube Arrays ◽  
Carbon Nanotube Arrays ◽  
Hot Filament

Chemical vapor deposition of nickel-group metals on multiwall carbon nanotubes

2007 ◽  
Vol 85 (10) ◽  
pp. 645-650 ◽  
Author(s):  
Maoqi Feng ◽  
Richard J Puddephatt
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Carbon Nanotube ◽  
Low Temperature ◽  
Vapor Deposition ◽  
Multiwall Carbon Nanotubes ◽  
Chemical Vapor ◽  
Pt Films ◽  
Bimetallic Films ◽  
Multiwall Carbon

Chemical vapor deposition (CVD) of Ni, Pd, and Pt films and of Ni/Pd and Pd/Pt bimetallic films on multiwall carbon nanotubes (MWCNTs) can be effected at low temperature if the nanotubes are pretreated by CVD of titanium carbide. In the absence of the pretreatment, the CVD leads to formation of isolated nanoparticles of the nickel-group metals. The metallized MWCNTs are curved or kinked, as a result of the interaction with the metal. Preliminary oxidation of the carbon nanotubes allows easier metallization, and the bending of the metallated nanotubes is not observed in this case.Key words: Chemical vapor deposition, platinum, palladium, nickel, carbon, nanotube.

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