The Effect of Surface Pressure on Langmuir-Blodgett Polymerization of 2- Pentadecyl Aniline

1992 ◽  
Author(s):  
H.-C. Zhou ◽  
R. S. Duran
Keyword(s):  
Surface Pressure ◽  
Langmuir Blodgett ◽  
Effect Of Surface

Molecular Organization of Nonlinear Organic Films Laminated by Langmuir-Blodgett Method

2005 ◽  
Vol 492-493 ◽  
pp. 115-122 ◽  
Author(s):  
Saburo Uchida ◽  
Vijay T. Chitnis ◽  
Hideo Furuhashi ◽  
Toshio Yoshikawa ◽  
Akinori Maeda ◽  
...  
Keyword(s):  
Surface Pressure ◽  
Nonlinear Optical ◽  
Epitaxial Films ◽  
Operating Conditions ◽  
Molecular Organization ◽  
Optimum Operating ◽  
Monolayer Formation ◽  
Langmuir Blodgett ◽  
Molecular Arrangement ◽  
Pressure Area

In the 21st century, the optical computation is likely to be the basic technology for processing lots of information at high speed. The aim of the present research work is to develop optical logic gates or memory chips. For this purpose, we have examined the suitability of organic nonlinear optical dye material Vanadyl-phthalocyanine (VOPc). Large single crystals of this material have been fabricated by using Molecular Beam Epitaxy (MBE) technique. The epitaxial films were formed on the substrate under optimum operating conditions. However, the epitixial growth is observed only up to a limited thickness. Above this thickness, the films become non-epitaxial, which can be improved by annealing. The reformation of the epitaxial films has been confirmed. We have also reported the effects of the environment of high temperature on the multilayered tetra-tert-butyl-Vanadyl-phthalocyanine ((t-bu)4VOPc) films, formed by Langmuir-Blodgett (LB) method. The solvent used to dissolve ((t-bu)4VOPc) was 1,2-dichloroethane. The monolayer on the surface of the water was transferred to a glass substrate by the vertical dipping method. If the multilayered stack is too thick, the molecular arrangement of the film may get disturbed. The improvement in the molecular arrangement of the LB films was examined and confirmed by measuring it’s nonlinear optical susceptibility, using Maker Fringe Method. Monolayer formation on water surface depends on the surface pressure-area isotherm. If this monolayer formation is not perfect, multiplayer stacks cannot be formed. The molecular films were aligned almost perpendicular to the substrate, as estimated from the limiting molecular area of surface pressure-area isotherm. The molecular organization of the monolayer on the substrate and the molecular structure of the multilayered ((t-bu)4VOPc) films are discussed.

Langmuir−Blodgett Films Formed by Continuously Varying Surface Pressure. Characterization by IR Spectroscopy and Epifluorescence Microscopy

Langmuir ◽  
2007 ◽  
Vol 23 (9) ◽  
pp. 4950-4958 ◽  
Author(s):  
Lin Wang ◽  
Antonio Cruz ◽  
Carol R. Flach ◽  
Jesús Pérez-Gil ◽  
Richard Mendelsohn
Keyword(s):  
Ir Spectroscopy ◽  
Surface Pressure ◽  
Epifluorescence Microscopy ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

Surface Pressure Induced Structural Effects in Photosynthetic Reaction Center Langmuir-Blodgett Films

Langmuir ◽  
1998 ◽  
Vol 14 (1) ◽  
pp. 193-198 ◽  
Author(s):  
Paolo Facci ◽  
Victor Erokhin ◽  
Sergio Paddeu ◽  
Claudio Nicolini
Keyword(s):  
Reaction Center ◽  
Surface Pressure ◽  
Photosynthetic Reaction Center ◽  
Structural Effects ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films

scholarly journals PREPARATION OF ODA-CLAY HYBRID FILMS BY LANGMUIR–BLODGETT TECHNIQUE

2009 ◽  
Vol 23 (10) ◽  
pp. 1351-1358 ◽  
Author(s):  
P. K. PAUL ◽  
S. A. HUSSAIN ◽  
D. BHATTACHARJEE
Keyword(s):  
Atomic Force Microscopy ◽  
Clay Minerals ◽  
Surface Pressure ◽  
Surface Coverage ◽  
Average Height ◽  
Hybrid Films ◽  
Force Microscopy ◽  
Langmuir Blodgett ◽  
Atomic Force ◽  
Pressure Area

Hybrid monolayers of clay minerals (hectorite) and Octadecyamine (ODA) were prepared using the Langmuir–Blodgett (LB) technique. Surface pressure–area per molecule isotherm, FTIR and atomic force microscopy were used to confirm and analyze the ODA-hectorite hybrid films. The monolayer thickness is 2 nm and average height, length and width of individual clay platelets ranges between 1.5 to 2 nm, 500 to 1250 nm and 100 to 115 nm respectively. The surface coverage was more than 80%.

Elastic anisotropies in 22-tricosenoic acid Langmuir-Blodgett films: surface pressure and dipping direction

1989 ◽  
Vol 1 (23) ◽  
pp. 3663-3669 ◽  
Author(s):  
D G Gleed ◽  
B Hillebrands ◽  
S Lee ◽  
G I Stegeman ◽  
J R Sambles ◽  
...  
Keyword(s):  
Surface Pressure ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Films
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