Vertically aligned carbon nanotubes grown from Langmuir–Blodgett films with nano alloy particles

• Published in: Japanese Journal of Applied Physics Vol. 61; no. SD; p. SD1026
• Main Authors: Sakurai, Shohei, Iida, Mayu, Okunuki, Kosei, Kushida, Masahito
• Format: Journal Article
• Language: English
• Published: Tokyo IOP Publishing 01.06.2022; Japanese Journal of Applied Physics
• Subjects: Carbon nanotubes; Catalysts; Cobalt ferrites; Electrons; Iron oxides; Langmuir-Blodgett films; Nanoalloys; nanoparticle; Nanoparticles; Palmitic acid; Particle size; VA-CNT
• ISSN: 0021-4922; 1347-4065
• DOI: 10.35848/1347-4065/ac5d14

Abstract In this study, we attempted to grow vertically aligned carbon nanotubes (VA-CNTs) from Langmuir–Blodgett (LB) films with accumulated nanoparticles and compare and evaluate the results with VA-CNTs grown from LB films with accumulated AlFe 2 O 4 nanoparticles in the addition to CoFe 2 O 4 and Fe 3 O 4 nanoparticles. CVD was performed on the accumulated LB films under the following conditions. As a result, VA-CNTs grown from smaller AlFe 2 O 4 nanoparticles were 4 to 5 times higher than from bigger AlFe 2 O 4 nanoparticles. When VA-CNTs were grown by varying the catalyst area ratio with palmitic acid, VA-CNTs with AlFe 2 O 4 nanoparticles were longer than those grown from Fe 3 O 4 nanoparticles and CoFe 2 O 4 nanoparticles when the catalyst area ratio was less than 0.2. The inner diameter of VA-CNTs grown with AlFe 2 O 4 NPs gradually decreased with decreasing catalyst area ratio and approached the original particle diameter, similar to the case with Fe 3 O 4 NPs.