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 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 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.

Preparation of Single-Walled Carbon Nanotube Solids and Their Mechanical Properties

2005 ◽  
Vol 20 (10) ◽  
pp. 2609-2612 ◽  
Author(s):  
Go Yamamoto ◽  
Yoshinori Sato ◽  
Toru Takahashi ◽  
Mamoru Omori ◽  
Toshiyuki Hashida ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Elastic Modulus ◽  
Processing Condition ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Walled Carbon Nanotubes

Single-walled carbon nanotubes (SWCNTs) were successfully solidified without any additives by hot-pressing and spark plasma sintering (SPS). The elastic modulus and fracture strength of the SWCNT solid prepared by the SPS method were about three and two times higher than that of the hot-pressed SWCNT solid prepared under the same processing condition. The enhancement of the mechanical properties of the SPS specimen may be due to the formation of comparatively stronger bond between SWCNTs, which is possibly brought about by the spark plasma generated in the SPS process.

scholarly journals Improving the mechanical properties of single-walled carbon nanotube sheets by intercalation of polymeric adhesives

2003 ◽  
Vol 82 (11) ◽  
pp. 1682-1684 ◽  
Author(s):  
Jonathan N. Coleman ◽  
Werner J. Blau ◽  
Alan B. Dalton ◽  
Edgar Muñoz ◽  
Steve Collins ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon
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