Surface Pressure Feedback Control for Langmuir-Blodgett Film Transfer. 2. Effect of Floating Monolayer Film Properties on Process Control Parameters

Langmuir ◽  
1995 ◽  
Vol 11 (7) ◽  
pp. 2755-2760 ◽  
Author(s):  
C. L. Mirley ◽  
M. G. Lewis ◽  
J. T. Koberstein ◽  
D. H. T. Lee
Keyword(s):  
Feedback Control ◽  
Surface Pressure ◽  
Control Parameters ◽  
Monolayer Film ◽  
Film Properties ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Pressure Feedback ◽  
Film Transfer ◽  
Langmuir Blodgett Film

Langmuir–Blodgett film properties of a donor–acceptor Schiff base

2000 ◽  
Vol 324 (1-3) ◽  
pp. 43-47 ◽  
Author(s):  
Mookandi Kanthimathi ◽  
Aruna Dhathathreyan ◽  
Balachandran Unni Nair
Keyword(s):  
Schiff Base ◽  
Film Properties ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Donor Acceptor ◽  
Langmuir Blodgett Film

Preparation of Chromophoric Dipolar Dendrons as Second-Order Nonlinear Optical Material

1997 ◽  
Vol 488 ◽  
Author(s):  
S. Yokoyama ◽  
S. Mashiko
Keyword(s):  
Thin Films ◽  
Second Harmonic ◽  
Nonlinear Optical Material ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Molecular Hyperpolarizability ◽  
Donor Acceptor ◽  
Film Transfer ◽  
Azobenzene Chromophore ◽  
Langmuir Blodgett Film

AbstractDendritic macromolecules, called “dendrons,” having a branching structure modified with an electron donor/acceptor functionalized azobenzene chromophore have been synthesized. The structurally different dendrons possess different numbers, 1, 3, 7, and 15, of chromophore units. The second harmonic generation (SHG) of dendrons was measured in the molecular oriented thin films prepared by the Langmuir-Blodgett film transfer technique. In such structurally organized thin films, individual chromophores coherently contribute to the increase in the molecular hyperpolarizability of dendrons. The SHG activity became large as the numbers of branching units of dendrons increased. The highest molecular hyperpolarizability was found to be <8000×10−30 esu for dendron containing 15 chromophoric units. The SHG results suggest that the structure of dendrons synthesized is uniaxially dipolar, and that there is a particular merit in this structure for the generation of SHG.

Isomerization Behavior of an Azopolymer in Terms of the Langmuir−Blodgett Film Thickness and the Transference Surface Pressure

2007 ◽  
Vol 40 (6) ◽  
pp. 2058-2069 ◽  
Author(s):  
Marta Haro ◽  
Beatriz Giner ◽  
Ignacio Gascón ◽  
Félix M. Royo ◽  
M. Carmen López
Keyword(s):  
Film Thickness ◽  
Surface Pressure ◽  
Blodgett Film ◽  
Langmuir Blodgett ◽  
Langmuir Blodgett Film

Langmuir-Blodgett Film Stability Via Atomic Force Microscopy

1998 ◽  
Vol 4 (S2) ◽  
pp. 306-307
Author(s):  
Dawn Y. Takamoto
Keyword(s):  
Fatty Acid ◽  
Monolayer Film ◽  
Fatty Acid Salt ◽  
Film Stability ◽  
Blodgett Film ◽  
Lb Films ◽  
Force Microscopy ◽  
Langmuir Blodgett ◽  
Atomic Force ◽  
Langmuir Blodgett Film

Langmuir-Blodgett (LB) films of fatty acid salts are inherently unstable due to the fundamental incompatibility of the asymmetric monolayer film transferred from the water surface with the centrosymmetric equilibrium form of the fatty acid bulk crystal. One consequence of this incompatibility is that fatty acid salt films deposited by the LB technique do not remain as flat and uniform films, but reorganize into bilayer step islands. By using mixed chain length films, the islands and holes had distinct heights that suggest this reorganization occurs by a bulk folding of the layers rather than a molecular reorganization of the molecules.We have studied cadmium arachidate (CdA) LB films, varying the substrate used, the number of layers deposited, and the time the film spends under the aqueous subphase. All films were imaged in air with an Atomic Force Microscope (AFM).

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