scholarly journals Structural discrimination of double-walled carbon nanotubes by chiral diporphyrin nanocalipers

2014 ◽  
Vol 2 (44) ◽  
pp. 19067-19074 ◽  
Author(s):  
Gang Liu ◽  
Yukie Saito ◽  
Daisuke Nishio-Hamane ◽  
Ajoy K. Bauri ◽  
Emmanuel Flahaut ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Diameter Distribution ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The spacer (carbazole–pyrene–carbazole) is made longer by 0.4 nm than that of the previous nanocalipers (carbazole–anthracene–carbazole), enabling DWNT separation. After the extraction, the diameter distribution of DWNTs becomes much narrower from 1.25–2.75 nm to 1.25–1.75 nm.

Far Infrared Characterization of Single and Double Walled Carbon Nanotubes

2011 ◽  
Vol 1284 ◽  
Author(s):  
S. G. Chou ◽  
Z. Ahmed ◽  
G.G. Samsonidze ◽  
J. Kong ◽  
M. S. Dresselhaus ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Room Temperature ◽  
Low Frequency ◽  
Far Infrared ◽  
Diameter Distribution ◽  
Thermal Excitation ◽  
Polyethylene Matrix ◽  
Swcnt Sample ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTHigh resolution far infrared absorption measurements were carried out for single walled and double walled carbon nanotubes samples (SWCNT and DWCNT) encased in a polyethylene matrix to investigate the temperature and bundling effects on the low frequency phonons associated with the low frequency circumferential vibrations. At a temperature where kBT is significantly lower than the phonon energy, the broad absorption features as observed at room temperature become well resolved phonon transitions. For a DWCNT sample whose inner tubes have a similar diameter distribution as the SWCNT sample studied, a series of sharp features were observed at room temperature at similar positions as for the SWCNT samples studied. The narrow linewidth is attributed to the fact that the inner tubes are isolated from the polyethylene matrix and the weak inter-tubule interactions. More systematic studies will be required to better understand the effects of inhomogeneous broadening and thermal-excitation on the detailed position and lineshape of the low frequency phonon features in carbon nanotubes.

Double-walled carbon nanotubes synthesized using carbon black as the dot carbon source

2006 ◽  
Vol 17 (13) ◽  
pp. 3100-3104 ◽  
Author(s):  
Zhi-Gang Chen ◽  
Feng Li ◽  
Wen-Cai Ren ◽  
Hongtao Cong ◽  
Chang Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Source ◽  
Carbon Black ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Covalent decoration onto the outer walls of double walled carbon nanotubes with perylenediimides

2015 ◽  
Vol 3 (19) ◽  
pp. 4960-4969 ◽  
Author(s):  
Myriam Barrejón ◽  
Sara Pla ◽  
Isadora Berlanga ◽  
María J. Gómez-Escalonilla ◽  
Luis Martín-Gomis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Charge Separation ◽  
Transient Absorption ◽  
Femtosecond Transient Absorption ◽  
Covalently Bonded ◽  
Absorption Studies ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Three new covalently bonded DWCNT–PDIs have been synthesized and characterized, showing exclusively functionalization of the outer walls leaving the inner walls intact. Femtosecond transient absorption studies were performed to seek evidence of charge separation in these hybrids.

Heat conduction in double-walled carbon nanotubes with intertube additional carbon atoms

2015 ◽  
Vol 17 (25) ◽  
pp. 16476-16482 ◽  
Author(s):  
Liu Cui ◽  
Yanhui Feng ◽  
Peng Tan ◽  
Xinxin Zhang
Keyword(s):  
Heat Transfer ◽  
Carbon Nanotubes ◽  
Heat Conduction ◽  
Heat Transfer Performance ◽  
Transfer Performance ◽  
Reduction Mechanisms ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Theoretical insights into the heat transfer performance and its reduction mechanisms in double-walled carbon nanotubes with intertube additional carbon atoms.

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