Langmuir-Blodgett films preparation

Langmuir-Blodgett films prepared from arachidic acid Nanosized, cationic Fe204 sandwiched between polar headgroups in LB films Domain structures were recognized in magnetic particles 796... 

Tachibana, H., Yamaka, Y., Sakai, H., Abe, M., and Matsumoto, M. Structural and Morphological Changes and Polymerization Behaviors of Diacetylene Langmuir-Blodgett Films on Adding Water Soluble Polyallylamine in the Subphase. Polymer 42, 1995 (2001). Nishiyama, K., Kurihara, M. A., and Fujihira, M. Photochromism of Amphiphilic Azobenzene Derivative in its Langmuir-Blodgett Films Prepared as Polyion Complex with Ionic Polymers. Thin Solid Films 179, All (1989). 

B. Langmuir-Blodgett Films Prepared by Polyion Complex Technique... 

Conroy, M., Ali-Adib, Z., Hodge, R, West, D., and King, C. T., Second-harmonic generation from thick all-polymeric Langmuir—Blodgett films prepared using polyurethanes, J. Mater. Chem., 4, 1, 1994. 

Luk S Y, Mayers F R and Williams J O 1988 Preparation and oharaoterization of Langmuir-Blodgett films of mesoporphyrin-IX dimethylester indium ohioride Thin Solid Films 157 69-79... 

In addition to the preparation of Langmuir and Langmuir-Blodgett films, the use of self-assembly techniques also plays an important role in the formation of particle films. Both physisorption, as, for example, electrostatic adsorption of charged particles from colloidal solution, and chemisorption onto a substrate have been investigated. In Section V.A, electrostatic adsorption will be reviewed chemisorption is the subject of Section V.B. 

Maggini, M., Karlsson, A., Pasimeni, L., Scorrano, G., Prato, M., and Vallid, L. (1994) Synthesis of N-acylated fulleropyrrolidines New materials for the preparation of Langmuir-Blodgett films containing fullerenes. Tetrahedron Lett. 35, 2985-2988. 

Langmuir-Blodgett films were prepared by spreading a 2 x 1(T4 M solution of the enantiomerically pure helicenebisquinone in chloroform onto a water surface. After evaporation of the solvent, the monolayer was compressed to a surface pressure of 20 mN/m. After stabilization for 30 min, the monolayers were transferred by the horizontal dipping method onto glass substrates, treated with octadecyltrichlorosilane to make them hydrophobic. 

An inhomogeneous system of interest is one in which a monolayer or less of a material segregates to the surface of a particle. The fluorescent molecule dil(5) (Figure 8.14) is an example of a material which is expected to be surface active on polar liquids because of its hydrophilic head group and hydrophobic side chains. In fact, dil(5) has been used to prepare Langmuir-Blodgett films on water(21) and would be expected to be surface active on glycerol. 

A benzo[18]crown-6 adduct (72) of Cgg (not shown) has been synthesized by the addition of the corresponding o-quinodimethane 71 in toluene [58]. The solubility of 72 in pro tic solvents such as MeOH strongly increases after the complexation of ions, as shown by extraction experiments. The combination of the crown ether and the fullerene moiety in 72 provides a highly amphiphilic character. This behavior allowed the preparation of Langmuir-Blodgett films of monolayers on mica of 72 and its complex. 

Thin films of materials play an important role in modern electronics. Langmuir-Blodgett films (Mort, 1980) are prepared from surface-active molecules that adsorb at the surface of an aqueous solution. The surface is gently compressed to produce a close-packed monolayer, which can be coated on appropriate substrates by dipping at constant surface pressure. The layers so produced are of a precise thickness, and repeated dipping gives multilayers. For example, diacetylenes and other polymerizable... 

Fulgide 37e, which has been synthesized by Hibino and Ando,46 could be used to prepare Langmuir-Blodgett films having photochromic properties similar to those observed in organic solvents. 

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