Boron-assisted coalescence of parallel multi-walled carbon nanotubes

Hiroyuki Muramatsu; Takuya Hayashi; Kazunori Fujisawa; Tomohiro Tojo; Yong-Il Ko; Aaron Morelos-Gomez; Kap-Seung Yang; Yoong Ahm Kim; Morinobu Endo; Mauricio Terrones; Mildred S. Dresselhaus

doi:10.1039/C3RA45394D

Boron-assisted coalescence of parallel multi-walled carbon nanotubes

Hiroyuki Muramatsu,^a Takuya Hayashi,^b Kazunori Fujisawa,^b Tomohiro Tojo,^c Yong-Il Ko,^b Aaron Morelos-Gomez,^b Kap-Seung Yang,^d Yoong Ahm Kim,*^d Morinobu Endo,^e Mauricio Terrones^ef and Mildred S. Dresselhaus^g

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* Corresponding authors

^a Department of Materials Science and Technology, Nagaoka University of Technology, Kamitomioka, Nagaoka 940-2188, Japan

^b Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan

^c Faculty of Engineering, Shizuoka University, 3-5-1 Johoku, Hamamatsu, Shizuoka, Japan

^d Department of Polymer and Fiber System Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Korea
E-mail: yak@jnu.ac.kr
Fax: +82-62-530-1779
Tel: +82-62-530-1871

^e Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan

^f Department of Physics, Department of Materials Science and Engineering & Materials Research Institute, The Pennsylvania State University, 104 Davey Lab., University Park, PA 16802-6300, USA

^g Department of Electrical Engineering and Computer Science and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA

Abstract

Coalescing carbon nanotubes is a major challenge for designing structures with novel physical and chemical properties and for creating three-dimensional carbon networks with improved mechanical and transport properties. We have coalesced adjacent triple walled carbon nanotubes (TWNTs) covalently, using catalytic boron atoms at high temperatures. The two outermost and then the two inner nanotubes of adjacent TWNTs merged in order to create an enlarged flattened double-walled carbon nanotube which encapsulated the two innermost single-walled carbon nanotubes.

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Boron-assisted coalescence of parallel multi-walled carbon nanotubes

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