Res. Chem. Intermed.
, Vol. 33, No. 1–2, pp. 101–110 (2007)
Also available online - www.brill.nl/rci
Fabrication of dialkyldimethylammonium/vanadium oxide
gel hybrid Langmuir–Blodgett membranes
, YUKIYASU IIJIMA
, YASUSHI MORIIZUMI
, EIJI SUZUKI
and HARUO INOUE
Faculty of Textile Science and Technology, Shinshu University 3-15-1 Tokida, Ueda, Nagano
Graduate Course of Engineering, Tokyo Metropolitan University, 1-1 Minamiosawa, Hachioji,
CREST, Japan Science and Technology Agency (JST), Tokyo, Japan
Received 19 September 2003; accepted 4 March 2004
Abstract—A hybrid Langmuir–Blodgett (LB) membrane of dialkyldimethylammonium (DCnA,
n = 12–18) and vanadium oxide gel was fabricated by compressing a DC
A monolayer on an aqueous
vanadium oxide solution. The vanadium oxide gel effectively aggregated in situ as a monolayer on
the LB trough and stabilized the ammonium monolayer by electrostatic interaction. The hybrid LB
monolayer, transferred onto a silicon wafer, had a smooth surface, with less than 1-nm roughness over
a1μm× 1 μm square area. Multilayered membranes, prepared by repeated transfer of monolayers,
showed sharp XRD patterns, assigned as an ordered bilayer-type structure with 2.9–4.8 nm thickness.
Keywords: Langmuir–Blodgett membrane; dialkyldimethylammonium; vanadium oxide; multilayer.
Semiconductor thin layers have attracted increasing attention in the last two
decades because of the wide range of their applications in electronics, optics and
optoelectronics [1, 2]. In particular, layer-by-layer deposition [3–7], because it
is a wet process, with mild conditions, i.e., room temperature and atmospheric
pressure, is applicable to organic and organic–inorganic hybrid layers. Furthermore,
the inorganic layered materials successfully stabilize the adjacent organic layers
by electrostatic interactions and serve as photo-electrochemically active materials
[8, 9]. However, the homogeneity of the hybrid layers strongly depends on the size
and shape of the inorganic layered materials.
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