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Fullerene Nanowires: Self‐Assembled Structures of a Low‐Molecular‐Weight Organogelator Fabricated by the Langmuir–Blodgett Method
Author(s) -
Tsunashima Ryo,
Noro Shinichiro,
Akutagawa Tomoyuki,
Nakamura Takayoshi,
Kawakami Hiroko,
Toma Kazunori
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200800493
Subject(s) - monolayer , langmuir–blodgett film , bilayer , intermolecular force , materials science , crystallography , hydrogen bond , chemical engineering , nanotechnology , chemistry , membrane , molecule , organic chemistry , biochemistry , engineering
Fullerene derivative C60TT, which is substituted with the low‐molecular‐weight organogelator tris(dodecyloxy)benzamide, formed nanowire structures on application of the Langmuir–Blodgett (LB) method. The surface morphology of the C60TT LB film was dependent on the holding time before deposition at a surface pressure of 5 mN m −1 ; it changed from a homogeneous monolayer to a bilayer fibrous structure via a fibrous monolayer structure, which was estimated to have dimensions of 1.2 nm in height, 8 nm in width, and 5–10 μm in length. From the structural and spectroscopic data, it is inferred that close packing of the fullerene moiety occurs along with intermolecular hydrogen bonding within the monolayer fibrous structure. The morphological changes in the LB film are explained kinetically by the Avrami theory, based on the decrease in the surface area of the monolayer at the air/water interface. The growth of the quasi‐one‐dimensional fibrous monolayer structures at holding times from 0 to 0.2 h is considered to be an interface‐controlled process, whereas the growth of the quasi‐one‐dimensional bilayer fibrous structures from 0.2 to 18 h is thought to be a diffusion‐controlled process.