Premium
Nanotube Coalescence‐Inducing Mode: A Novel Vibrational Mode in Carbon Systems
Author(s) -
Endo Morinobu,
Kim Yoong Ahm,
Hayashi Takuya,
Muramatsu Hiroyuki,
Terrones Mauricio,
Saito Riichiro,
VillalpandoPaez Federico,
Chou Shin Grace,
Dresselhaus Mildred S.
Publication year - 2006
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200600087
Subject(s) - carbon nanotube , coalescence (physics) , raman spectroscopy , materials science , covalent bond , boron , chemical physics , annealing (glass) , molecular vibration , thermal , normal mode , nanotechnology , doping , vibration , chemical engineering , molecular physics , optoelectronics , chemistry , organic chemistry , composite material , thermodynamics , optics , physics , engineering , quantum mechanics , astrobiology
A resonant Raman mode located at 1855 cm −1 is related to vibrations of linear carbon chains and observed as a precursor to the merging of highly purified double‐walled carbon nanotubes (DWNTs, see figure). This mode, termed the “coalescence‐inducing mode” (CIM), which initiates the coalescence process, is induced by thermal annealing and its effect is enhanced by boron doping. The CIM mode arises from the generation of short 1D carbon chains (e.g., 3–7 atoms long) established covalently between adjacent tubes.