Patterning of Catalysts for the Selective Growth of Carbon Nanotubes Using Laser Irradiation of Nickel Nitrate

2011 ◽  
Vol 11 (1) ◽  
pp. 602-605 ◽  
Author(s):  
M. H. Park ◽  
J. W. Lee ◽  
Y. I. Lee ◽  
J. H. Lee ◽  
J. H. Hwang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Laser Irradiation ◽  
Selective Growth ◽  
Nickel Nitrate

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).

Selective Growth of Metal-Free Metallic and Semiconducting Single-Wall Carbon Nanotubes

2017 ◽  
Vol 29 (32) ◽  
pp. 1605719 ◽  
Author(s):  
Lili Zhang ◽  
Dong-Ming Sun ◽  
Peng-Xiang Hou ◽  
Chang Liu ◽  
Tianyuan Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Selective Growth ◽  
Single Wall Carbon Nanotubes ◽  
Single Wall Carbon ◽  
Metal Free

Selective growth of individual multiwalled carbon nanotubes

2004 ◽  
Vol 4 (6) ◽  
pp. 591-594 ◽  
Author(s):  
R.E. Morjan ◽  
M.S. Kabir ◽  
S.W. Lee ◽  
O.A. Nerushev ◽  
P. Lundgren ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Selective Growth ◽  
Multiwalled Carbon
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