Nano-spectroscopy of Individual Carbon Nanotubes and Isolated Graphene Sheets

2010 ◽  
pp. 91-109 ◽  
Author(s):  
Alain Jungen
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Sheets

scholarly journals Electrically Conductive Networks from Hybrids of Carbon Nanotubes and Graphene Created by Laser Radiation

Nanomaterials ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 1875
Author(s):  
Alexander Yu. Gerasimenko ◽  
Artem V. Kuksin ◽  
Yury P. Shaman ◽  
Evgeny P. Kitsyuk ◽  
Yulia O. Fedorova ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Laser Irradiation ◽  
Flexible Electronics ◽  
Threshold Energy ◽  
Wavelength Region ◽  
Hybrid Nanostructures ◽  
Graphene Sheets ◽  
Electrically Conductive ◽  
Walled Carbon Nanotubes

A technology for the formation of electrically conductive nanostructures from single-walled carbon nanotubes (SWCNT), multi-walled carbon nanotubes (MWCNT), and their hybrids with reduced graphene oxide (rGO) on Si substrate has been developed. Under the action of single pulses of laser irradiation, nanowelding of SWCNT and MWCNT nanotubes with graphene sheets was obtained. Dependences of electromagnetic wave absorption by films of short and long nanotubes with subnanometer and nanometer diameters on wavelength are calculated. It was determined from dependences that absorption maxima of various types of nanotubes are in the wavelength region of about 266 nm. It was found that contact between nanotube and graphene was formed in time up to 400 fs. Formation of networks of SWCNT/MWCNT and their hybrids with rGO at threshold energy densities of 0.3/0.5 J/cm2 is shown. With an increase in energy density above the threshold value, formation of amorphous carbon nanoinclusions on the surface of nanotubes was demonstrated. For all films, except the MWCNT film, an increase in defectiveness after laser irradiation was obtained, which is associated with appearance of C–C bonds with neighboring nanotubes or graphene sheets. CNTs played the role of bridges connecting graphene sheets. Laser-synthesized hybrid nanostructures demonstrated the highest hardness compared to pure nanotubes. Maximum hardness (52.7 GPa) was obtained for MWCNT/rGO topology. Regularity of an increase in electrical conductivity of nanostructures after laser irradiation has been established for films made of all nanomaterials. Hybrid structures of nanotubes and graphene sheets have the highest electrical conductivity compared to networks of pure nanotubes. Maximum electrical conductivity was obtained for MWCNT/rGO hybrid structure (~22.6 kS/m). Networks of nanotubes and CNT/rGO hybrids can be used to form strong electrically conductive interconnections in nanoelectronics, as well as to create components for flexible electronics and bioelectronics, including intelligent wearable devices (IWDs).

Fracture and progressive failure of defective graphene sheets and carbon nanotubes

2009 ◽  
Vol 88 (4) ◽  
pp. 602-609 ◽  
Author(s):  
J.R. Xiao ◽  
J. Staniszewski ◽  
J.W. Gillespie
Keyword(s):  
Carbon Nanotubes ◽  
Progressive Failure ◽  
Graphene Sheets ◽  
Defective Graphene

Magnetic graphene: A new class of cages formed from graphene sheets and carbon nanotubes

2010 ◽  
Vol 82 (16) ◽  
Author(s):  
Sergey Lisenkov ◽  
Antonis N. Andriotis ◽  
Madhu Menon
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Sheets ◽  
New Class ◽  
Magnetic Graphene

scholarly journals Intrinsic conductivity of carbon nanotubes and graphene sheets having a realistic geometry

2015 ◽  
Vol 143 (20) ◽  
pp. 204902 ◽  
Author(s):  
Fernando Vargas–Lara ◽  
Ahmed M. Hassan ◽  
Edward J. Garboczi ◽  
Jack F. Douglas
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Sheets ◽  
Intrinsic Conductivity ◽  
Realistic Geometry

Wetting of Liquid Iron in Carbon Nanotubes and on Graphene Sheets: A Molecular Dynamics Study

2011 ◽  
Vol 28 (3) ◽  
pp. 036102 ◽  
Author(s):  
Yu-Feng Gao ◽  
Yang Yang ◽  
De-Yan Sun
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Liquid Iron ◽  
Graphene Sheets

scholarly journals 3D carbon nanotubes and graphene sheets grown simultaneously on copper

MRS Bulletin ◽  
2019 ◽  
Vol 44 (12) ◽  
pp. 910-911
Author(s):  
Nora M. Hassan
Keyword(s):  
Carbon Nanotubes ◽  
Graphene Sheets

Efficient oxygen reduction on sandwich-like metal@N–C composites with ultrafine Fe nanoparticles embedded in N-doped carbon nanotubes grafted on graphene sheets

Nanoscale ◽  
2019 ◽  
Vol 11 (26) ◽  
pp. 12610-12618 ◽  
Author(s):  
Xiao Han ◽  
Zhiping Zheng ◽  
Jiayu Chen ◽  
Yakun Xue ◽  
Huiqi Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Oxygen Reduction ◽  
Graphene Sheets ◽  
Fe Nanoparticles

Sandwich-like metal@N–C composites with ultrafine Fe nanoparticles embedded in N-CNTs grafted on graphene sheets are designedly synthesized as ORR electrocatalysts.

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