Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl.

Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl. Research Abstract Details 

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Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl. Abstract Text:

Stephan Block,Christiane A Helm,Stephan Block,Christiane A Helm,

The colloidal probe technique (CPT) is used to measure distance-dependent interaction forces between polyelectrolyte layers physisorbed from 1 M NaCl solution in salt solutions between 0.1 mM and 1 M. Both linear polycations (poly(allylamine)hydrochloride, poly-L-lysine) and linear polyanions (poly(styrenesulfonate)) are used. The repulsive interaction energies in the range between 10(-7) and 10(-4) J/m2 are described by the theory of Alexander and de Gennes for surfaces covered with neutral anchored polymers. However, the brush thickness scales with molecular area and salt concentration with a power of -1/3 as known from a salted brush and reaches approximately 50% of the contour length in diluted solutions. The findings are confirmed by CPT images using a gold layer as height reference.

Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl. Publishing Authors By Initials

S Block,CA Helm,S Block,CA Helm,

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Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Physical review. E, Statistical, nonlinear, and so

VOLUME: 76

Page Numbers: 030801

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ISSN: 1539-3755

DAY: 4

MONTH: 09

YEAR: 2007

Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Measurement of long-ranged steric forces between polyelectrolyte layers physisorbed from 1 M NaCl.

AFFILIATION: Institut für Physik, Ernst-Moritz-Arndt Universität, Felix-Hausdorff-Strasse 6, D-17487 Greifswald, Germany.

Country: United States

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MEDLINETA: Phys Rev E Stat Nonlin Soft Ma

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