Bond-orientational order in Langmuir-Blodgett surfactant monolayers
نویسندگان
چکیده
Cadmium stearate surfactant molecules assembled into monolayers by the Langmuir-Blodgett method exhibit bond-orientational order. Bond-orientational correlations extend over macroscopic distances on the order of a millimeter while translational correlations decay on a scale of tens of angstroms. The long axis of the molecules are tilted away from the surface normal but the tilt direction is disordered. Our results, obtained by transmission electron diffraction, suggest clustering of the hydrocarbon chains in the monolayer. J. Physique 47 (1986) 701-709 AVRIL 1986,
منابع مشابه
Sensitive methods for estimating the anchoring strength of nematic liquid crystals on Langmuir-Blodgett monolayers of fatty acids.
The anchoring of the nematic liquid crystal N-(p-methoxybenzylidene)-p-butylaniline (MBBA) on Langmuir-Blodgett monolayers of fatty acids (COOHC(n)H(2n+1)) was studied as a function of the length of the fatty acid alkyl chain n (n=15,17,19,21). The monolayers were deposited onto glass plates coated with indium tin oxide, which were used to assemble sandwich cells of various thicknesses that wer...
متن کاملSelf-assembly of linactants: micelles and lyotropic liquid crystals in two dimensions.
We report observations of phenomena within two-component Langmuir monolayers that are analogous to surfactant self-assembly in 3D solutions. A partially fluorinated fatty phosphonic acid played the role of 2D surfactant (linactant), and a perfluorinated fatty acid acted as the 2D solvent. Langmuir-Blodgett monolayers were prepared from mixtures of these compounds and examined using atomic force...
متن کاملPhase Transitions in Dipalmitoylphosphatidylcholine Monolayers.
A self-assembled phospholipid monolayer at an air-water interface is a well-defined model system for studying surface thermodynamics, membrane biophysics, thin-film materials, and colloidal soft matter. Here we report a study of two-dimensional phase transitions in the dipalmitoylphosphatidylcholine (DPPC) monolayer at the air-water interface using a newly developed methodology called constrain...
متن کاملDipping-induced azimuthal helix orientation in Langmuir-Blodgett monolayers of alpha-helical amphiphilic diblock copolypeptides.
The azimuthal helix orientation of the rigid-rod amphiphilic diblock copolypeptides (PLGA-b-PMLGSLGs) of poly(alpha-L-glutamic acid) (PLGA) and poly(gamma-methyl-L-glutamate-ran-gamma-stearyl-L-glutamate) with 30 mol % of stearyl substituents (PMLGSLG) in Langmuir-Blodgett (LB) monolayers was investigated using polarized transmission Fourier transform infrared spectroscopy. The relative positio...
متن کاملSynthesis, Langmuir and Langmuir-Blodgett films of a calix[7]arene ethyl ester
Calixarenes are promising compounds to be used as ionophores and for molecular recognition. Their ability to form Langmuir and Langmuir-Blodgett (LB) films is of great interest in order to obtain small sensor devices which incorporate an active nanometric film. The p-tert-butylcalix[7]arene ethyl ester compound has been synthesised and its ability to form Langmuir and LB films has been shown. T...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2017