Phase Transitions in DNA/Surfactant Adsorption Layers

被引：19

作者：

Lyadinskaya, Vanda V. ^{[1
]}

Lin, Shi-Yow ^{[1
]}

Michailov, Alexander V. ^{[2
]}

Povolotskiy, Alexey V. ^{[2
]}

Noskov, Boris A. ^{[2
]}

机构：

[1] Natl Taiwan Univ Sci & Technol, Dept Chem Engn, 43 Keelung Rd,Sect 4, Taipei 106, Taiwan

[2] St Petersburg State Univ, Inst Chem, Univ Sky Pr 26, St Petersburg 198504, Russia

来源：

LANGMUIR | 2016年 / 32卷 / 50期

关键词：

AIR-WATER-INTERFACE; COIL-GLOBULE TRANSITION; AIR/WATER INTERFACE; CATIONIC SURFACTANT; LANGMUIR MONOLAYERS; NEUTRON REFLECTOMETRY; DODECYLTRIMETHYLAMMONIUM BROMIDE; GEMINI SURFACTANT; LIPID MONOLAYERS; DODECYL-SULFATE;

D O I：

10.1021/acs.langmuir.6b03396

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The adsorption layers of complexes between DNA and oppositely charged surfactants dodecyltrimethylammonium bromide (DTAB) and cetyltrimethylammonium bromide (CTAB) at the solution/air interface were studied with surface tensiometry, dilational surface rheology, atomic force microscopy, Brewster angle microscopy, infrared absorption reflection spectroscopy, and ellipsometry. Measurements of the kinetic dependencies of the surface properties gave a possibility to discover the time intervals corresponding to the coexistence of two-dimensional phases. One can assume that the observed phase transition is of the first order, unlike the formation of microaggregates in the adsorption layers of mixed solutions of synthetic polyelectrolytes and surfactants. The multi techniques approach together with the calculations of the adsorption kinetics allowed the elucidation of the structure of coexisting surface phases and the distinguishing of four main steps of adsorption layer formation at the surface of DNA/surfactant solutions.

引用

页码：13435 / 13445

页数：11

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