Study of electrostatic energy contribution on monolayer domains size

Martin Weis; Wei Ou-Yang; Takahiro Aida; Tetsuya Yamamoto; Takaaki Manaka; Mitsumasa Iwamoto

doi:10.1016/j.tsf.2008.09.016

Study of electrostatic energy contribution on monolayer domains size

Martin Weis, Wei Ou-Yang, Takahiro Aida, Tetsuya Yamamoto, Takaaki Manaka, Mitsumasa Iwamoto

Institute of Science Tokyo

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Phospholipid organic monolayer at the air-water interface was studied in the presence of magnesium ions. For this reason the domain size by Brewster angle microscopy (BAM) as well as the Gibbs energy by thermodynamic analysis is evaluated. Domain size increase is discussed with respect to the shape equation on the basis of the electrostatic energy contribution. By coupling these techniques it was found that for ion adsorption at first it is preferred domain boundary and liquid expanded (LE) phase. Only after reaching of specific concentration (30 mM) ions are adsorbed also inside of the liquid condensed (LC) domain. Evaluation of BAM images and thermodynamic analysis reveals existence of pure repulsive forces; it is illustrated by gradual increase of average domain area. Additionally, in low magnesium ion concentration region it was successful to use Langmuir adsorption isotherm for fitting the observed domain area.

Original language	English
Pages (from-to)	1317-1320
Number of pages	4
Journal	Thin Solid Films
Volume	517
Issue number	4
DOIs	https://doi.org/10.1016/j.tsf.2008.09.016
State	Published - 31 Dec 2008
Externally published	Yes

Keywords

Electrostatic charge
Langmuir film
Shape equation

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10.1016/j.tsf.2008.09.016

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title = "Study of electrostatic energy contribution on monolayer domains size",

abstract = "Phospholipid organic monolayer at the air-water interface was studied in the presence of magnesium ions. For this reason the domain size by Brewster angle microscopy (BAM) as well as the Gibbs energy by thermodynamic analysis is evaluated. Domain size increase is discussed with respect to the shape equation on the basis of the electrostatic energy contribution. By coupling these techniques it was found that for ion adsorption at first it is preferred domain boundary and liquid expanded (LE) phase. Only after reaching of specific concentration (30 mM) ions are adsorbed also inside of the liquid condensed (LC) domain. Evaluation of BAM images and thermodynamic analysis reveals existence of pure repulsive forces; it is illustrated by gradual increase of average domain area. Additionally, in low magnesium ion concentration region it was successful to use Langmuir adsorption isotherm for fitting the observed domain area.",

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doi = "10.1016/j.tsf.2008.09.016",

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TY - JOUR

T1 - Study of electrostatic energy contribution on monolayer domains size

AU - Weis, Martin

AU - Ou-Yang, Wei

AU - Aida, Takahiro

AU - Yamamoto, Tetsuya

AU - Manaka, Takaaki

AU - Iwamoto, Mitsumasa

PY - 2008/12/31

Y1 - 2008/12/31

N2 - Phospholipid organic monolayer at the air-water interface was studied in the presence of magnesium ions. For this reason the domain size by Brewster angle microscopy (BAM) as well as the Gibbs energy by thermodynamic analysis is evaluated. Domain size increase is discussed with respect to the shape equation on the basis of the electrostatic energy contribution. By coupling these techniques it was found that for ion adsorption at first it is preferred domain boundary and liquid expanded (LE) phase. Only after reaching of specific concentration (30 mM) ions are adsorbed also inside of the liquid condensed (LC) domain. Evaluation of BAM images and thermodynamic analysis reveals existence of pure repulsive forces; it is illustrated by gradual increase of average domain area. Additionally, in low magnesium ion concentration region it was successful to use Langmuir adsorption isotherm for fitting the observed domain area.

AB - Phospholipid organic monolayer at the air-water interface was studied in the presence of magnesium ions. For this reason the domain size by Brewster angle microscopy (BAM) as well as the Gibbs energy by thermodynamic analysis is evaluated. Domain size increase is discussed with respect to the shape equation on the basis of the electrostatic energy contribution. By coupling these techniques it was found that for ion adsorption at first it is preferred domain boundary and liquid expanded (LE) phase. Only after reaching of specific concentration (30 mM) ions are adsorbed also inside of the liquid condensed (LC) domain. Evaluation of BAM images and thermodynamic analysis reveals existence of pure repulsive forces; it is illustrated by gradual increase of average domain area. Additionally, in low magnesium ion concentration region it was successful to use Langmuir adsorption isotherm for fitting the observed domain area.

KW - Electrostatic charge

KW - Langmuir film

KW - Shape equation

UR - https://www.scopus.com/pages/publications/56949092856

U2 - 10.1016/j.tsf.2008.09.016

DO - 10.1016/j.tsf.2008.09.016

M3 - 文章

AN - SCOPUS:56949092856

SN - 0040-6090

VL - 517

SP - 1317

EP - 1320

JO - Thin Solid Films

JF - Thin Solid Films

IS - 4

ER -

Study of electrostatic energy contribution on monolayer domains size

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Keywords

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