ELECTRICAL TRANSPORT PROPERTIES OF SINGLE-WALLED CARBON NANOTUBE BUNDLES TREATED WITH BORIC ACID

NANO ◽  
2011 ◽  
Vol 06 (04) ◽  
pp. 337-341 ◽  
Author(s):  
DALE HITCHCOCK ◽  
KEQIN YANG ◽  
JIAN HE ◽  
APPARAO M. RAO
Keyword(s):  
Carbon Nanotube ◽  
Boric Acid ◽  
Electrical Transport ◽  
Electrical Transport Properties ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Plasma Sintering ◽  
Treated Sample ◽  
Spark Plasma ◽  
Nonmonotonic Variation

Electric-arc-synthesized single-walled carbon nanotube (SWNT) bundles were sonicated in boric acid, dried and sintered under vacuum at 1200°C using a spark plasma sintering process. The nominal boric acid concentrations were 0%, 2.5%, 5%, 7.5%, 12.5% and 15%. This resulted in a nonmonotonic variation of carrier concentration in the resulting samples. The 7.5% boric acid treated sample showed the least magnitude and weakest temperature-dependence for the thermopower with a distinct phonon-drag peak that was absent in the other samples. These results are discussed within the framework of the doping-induced shift of the Fermi level and changes in the electron–phonon coupling.

Single-walled carbon nanotube-derived novel structural material

2006 ◽  
Vol 21 (6) ◽  
pp. 1537-1542 ◽  
Author(s):  
Go Yamamoto ◽  
Yoshinori Sato ◽  
Toru Takahashi ◽  
Mamoru Omori ◽  
Toshiyuki Hashida ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Interfacial Strength ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
Processing Temperature ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Plasma Sintering ◽  
Spark Plasma

Binder-free macroscopic single-walled carbon nanotube (SWCNT) solids were prepared by spark plasma sintering (SPS) of purified SWCNTs. The effects of processing temperatures and pressures on the mechanical properties of the SWCNT solids and structural change of SWCNTs in the SWCNT solids were investigated. Transmission electron microscope observation of the SWCNT solids revealed thatthe high-temperature treatment has transformed some part of the SWCNTs into amorphous-like structure and the rest of the SWCNTs remained buried into the above structure. The mechanical properties of the SWCNT solids increased with the increasing processing temperature, probably reflecting the improvement of interfacial strength between SWCNTs and disordered structure of carbon due to the spark plasma generated in the SPS process.

scholarly journals Electrical Transport Properties of Multilayered Single-Walled Carbon Nanotube Films

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Yanli Zhao ◽  
Wenzhi Li
Keyword(s):  
Carbon Nanotube ◽  
Transport Properties ◽  
Electrical Transport ◽  
Layer By Layer ◽  
Electrical Transport Properties ◽  
Filtration Method ◽  
Single Walled Carbon Nanotube ◽  
Vacuum Filtration ◽  
Single Walled Carbon ◽  
Swcnt Film

An improved layer-by-layer vacuum filtration method was adopted for the fabrication of single-walled carbon nanotube (SWCNT) films aiming at a series of SWCNT films with controllable thickness and density. The electrical transport properties of the multilayered SWCNT films have been investigated. With the constant film density, the decrease of the layer number of the SWCNT film results in an increase of the temperature coefficient of resistance (TCR). SWCNT film with 95% metallic nanotubes has shown a lower TCR than that of the SWCNT films with a low percentage of metallic nanotubes. The effect of thermal annealing and subsequent acid (HNO3) treatment on the electrical properties of the SWCNT films has also been investigated.

scholarly journals Mechanical Properties of Single-Walled Carbon Nanotube Solids Prepared by Spark Plasma Sintering

2007 ◽  
Vol 1 (7) ◽  
pp. 854-863
Author(s):  
Go YAMAMOTO ◽  
Yoshinori SATO ◽  
Toru TAKAHASHI ◽  
Mamoru OMORI ◽  
Kazuyuki TOHJI ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Spark Plasma Sintering ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Plasma Sintering ◽  
Spark Plasma

Electrical transport properties in a single-walled carbon nanotube network

2012 ◽  
Vol 9 (2) ◽  
pp. 183-186 ◽  
Author(s):  
Karim Snoussi ◽  
Amin Vakhshouri ◽  
Haruya Okimoto ◽  
Taishi Takenobu ◽  
Yoshihiro Iwasa ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Transport Properties ◽  
Electrical Transport ◽  
Electrical Transport Properties ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Carbon Nanotube Network

Thermal and Electrical Transport Measurements of Single-Walled Carbon Nanotube Strands

2003 ◽  
Vol 788 ◽  
Author(s):  
Diana-Andra Borca-Tasciuc ◽  
Yann LeBon ◽  
Claire Nanot ◽  
Gang Chen ◽  
Theodorian Borca-Tasciuc ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotube ◽  
Electrical Properties ◽  
Specific Heat ◽  
Electrical Transport ◽  
Published Data ◽  
Temperature Dependent ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Temperature Dependent Properties

ABSTRACTThis work reports temperature dependent thermal and electrical properties characterization of long (mm size) single-walled carbon nanotube strands. Electrical properties are measured using a 4-probe method. Thermal conductivity and specific heat capacity are determined using an AC driven, self-heating method. Normalized values of resistivity, thermal conductivity, specific heat, thermal diffusivity, and the temperature coefficient of resistance are reported. The trends observed in the temperature dependent properties are comparable with previously published data on multi-walled carbon nanotube strands measured with a similar technique.

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