Electrical properties of adsorbed films of some halogeno-acetic acid derivatives at the water/air interface

AbstractIn the present work we have studied the characteristics of Pb1.05-xLaxTil-x/4O3 ( x= 0 to 30 at%) thin films prepared by acetic acid and methoxy-ethanol based sol-gel techniques. We have found that higher intermediate temperature fired films (x=0.15), prepared by acetic acid modified technique yielded (100) textured growth with improved dielectric properties. It has been argued that homogeneous mixing of the film constituents in the sol is influenced by the choice of the precursor materials and preparation methodology which in turn controls the growth characteristics and electrical properties. Lanthanum as a dopant has a pronounced influence on the structure, microstructure and electrical properties of the deposited films. In the Raman spectra, the soft E(1TO) phonon shifts towards the lower frequency with a sharp decrease in its intensity and a tetragonal to cubic structural transformation (for 26.5 at % La) was observed at room temperature. In the ferroelectric composition range (up to 15 at % La doping), we have observed a significant improvement of ferroelectric properties with the La addition.

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Phase transition in the adsorbed films at water/air interface

Journal of Colloid and Interface Science ◽

10.1016/0021-9797(84)90475-2 ◽

1984 ◽

Vol 98 (1) ◽

pp. 33-38 ◽

Cited By ~ 69

Author(s):

Makoto Aratono ◽

Shozo Uryu ◽

Yoshiteru Hayami ◽

Kinsi Motomura ◽

Ryohei Matuura

Keyword(s):

Phase Transition ◽

Adsorbed Films ◽

Air Interface

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PHYSICOCHEMICAL PROPERTIES OF QUATERNARY SALTS OF ETHYL ETHER 4-MORPHOLINYL ACETIC ACID

Вестник Тверского государственного университета. Серия: Химия ◽

10.26456/vtchem2020.2.11 ◽

2020 ◽

pp. 96-101

Author(s):

Нина Ивановна Белоцерковец

Keyword(s):

Surface Tension ◽

Acetic Acid ◽

Critical Micelle Concentration ◽

Physicochemical Properties ◽

Ethyl Ether ◽

Adsorption Layer ◽

Quaternary Salts ◽

Air Interface ◽

Surface Tension Isotherms

Для четвертичных солей Х-алкил-Х-(этоксикарбонил)-метилморфолиния (алкил: бензил-, додецил-, гексадецил-) получены изотермы поверхностного натяжения на границе водный раствор-воздух, определены значения критической концентрации мицеллообразования, предельной адсорбции, площади молекулы в насыщенном адсорбционном слое. For the quaternary salts of N-alkyl-N-(ethoxycarbonyl)methylmorpholinium (alkyl: benzyl-, dodecyl-, hexadecyl-), surface tension isotherms were obtained at the water-air interface, values of critical micelle concentration, limiting adsorption, and the area of the molecule in saturated adsorption layer were determined.

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