Photoresponsive conductance switching of multi-walled carbon nanotubes bearing covalently linked spironaphthoxazine

2009 ◽  
Vol 9 (6) ◽  
pp. 1269-1271 ◽  
Author(s):  
In Woo Cheong ◽  
Sheng Wang ◽  
Ho Seung Ki ◽  
Sung-Hoon Kim
Keyword(s):  
Carbon Nanotubes ◽  
Conductance Switching ◽  
Multi Walled Carbon Nanotubes ◽  
Covalently Linked ◽  
Walled Carbon Nanotubes

Dynamic electrical properties of polymer-carbon nanotube composites: Enhancement through covalent bonding

2006 ◽  
Vol 21 (4) ◽  
pp. 1071-1077 ◽  
Author(s):  
Seamus A. Curran ◽  
Donghui Zhang ◽  
Wudyalew T. Wondmagegn ◽  
Amanda V. Ellis ◽  
Jiri Cech ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Conductivity Measurement ◽  
Decomposition Temperature ◽  
Composite Formation ◽  
Nanotube Composites ◽  
Multi Walled Carbon Nanotubes ◽  
Charge Hopping ◽  
A New Technique ◽  
Covalently Linked ◽  
Walled Carbon Nanotubes

Composite formation between carbon nanotubes and polymers can dramatically enhance the electrical and thermal properties of the combined materials. We have prepared a composite from polystyrene and multi-walled carbon nanotubes (MWCNT) and, unlike traditional techniques of composite formation, we chose to polymerize styrene from the surface of dithiocarboxylic ester-functionalized MWCNTs to fabricate a unique composite material, a new technique dubbed “gRAFT” polymerization. The thermal stability of the polymer matrix in the covalently linked MWCNT-polystyrene composite is significantly enhanced, as demonstrated by a 15 °C increase of the decomposition temperature than that of the noncovalently linked MWCNT-polystyrene blend. Thin films made from the composite with low MWCNT loadings (<0.9 wt%) are optically transparent, and we see no evidence of aggregation of nanotubes in the thin film or solution. The result from the conductivity measurement as a function of MWCNT loadings suggests two charge transport mechanisms: charge hopping in low MWCNT loadings (0.02–0.6 wt%) and ballistic quantum conduction in high loadings (0.6–0.9 wt%). The composite exhibits dramatically enhanced conductivity up to 33 S m−1 at a low MWCNT loading (0.9 wt%).

Single- and multi-walled carbon nanotubes covalently linked to perylenebisimides: synthesis, characterization and photophysical properties

2012 ◽  
Vol 3 (2) ◽  
pp. 470-475 ◽  
Author(s):  
Roberto Martín ◽  
F. Javier Céspedes-Guirao ◽  
Maykel de Miguel ◽  
Fernando Fernández-Lázaro ◽  
Hermenegildo García ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Photophysical Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Covalently Linked ◽  
Walled Carbon Nanotubes

Multi-walled Carbon Nanotubes Penetrate into Plant Cells and Affect the Growth of Onobrychis arenaria Seedlings

Acta Naturae ◽  
2011 ◽  
Vol 3 (1) ◽  
pp. 99-106 ◽  
Author(s):  
E A Smirnova ◽  
A A Gusev ◽  
O N Zaitseva ◽  
E M Lazareva ◽  
G E Onishchenko ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Plant Cells ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes
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