Electrokinetic properties, colloidal stability and aggregation kinetics of polymer colloids

Hidalgo‐Álvarez, R.; Martin, Alison; Fernández, Antonio; Bastos, Daniele Cruz; Martı́nez, Froylán; Nieves, F. J. de las

doi:10.1016/0001-8686(96)00297-7

Cited by 195 publications

(155 citation statements)

References 352 publications

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“…As can be seen, a qualitative relation between mobility and surface charge density seems to exist: the higher the former, the higher the latter. It should be also stressed that the widely reported maximun (in absolute value) in mobility (19) does not appear, which agrees with the results found by El Gholabzouri et al According to these authors, the mentioned maximun does not appear if the magnitude of surface charge is smaller than 3.40 µC · cm −2 (20). From these measurements, the surface charge enclosed by the shear plane was again calculated.…”

Section: Figsupporting

confidence: 85%

An Experimental Test of the Ion Condensation Theory for Spherical Colloidal Particles

Quesada‐Pérez

Callejas-Fernández

Hidalgo‐Álvarez

2001

Journal of Colloid and Interface Science

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Section: Figsupporting

confidence: 85%

An Experimental Test of the Ion Condensation Theory for Spherical Colloidal Particles

Quesada‐Pérez

Callejas-Fernández

Hidalgo‐Álvarez

2001

Journal of Colloid and Interface Science

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“…The MidT dsDNA leaves a section of ssDNA exposed to the solution. This is more flexible and we hypothesise that when the dsDNA is in the middle of the DNA, the single stranded end section coils/ folds back to increase the charge density around the particle 66 , thus creating a larger zeta potential. In the case where the dsDNA is at the end of the sequence, the ability of the DNA to fold back on its self is restricted and forms a more rigid elongated oligomer across the entire length of the DNA, moving the charge away from the surface and lowering the surface charge density.…”

Section: Detecting Target Dna Hybridisationmentioning

confidence: 99%

Particle-by-Particle Charge Analysis of DNA-Modified Nanoparticles Using Tunable Resistive Pulse Sensing

2016

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Resistive pulse sensors, RPS, are allowing the transport mechanism of molecules, proteins and even nanoparticles to be characterised as they traverse pores. Previous work using RPS has shown that the size, concentration and zeta potential of the analyte can be measured. Here we use tunable resistive pulse sensing (TRPS) which utilises a tunable pore to monitor the translocation times of nanoparticles with DNA modified surfaces. We start by demonstrating that the translocation times of particles can be used to infer the zeta potential of known standards and then apply the method to measure the change in zeta potential of DNA modified particles. By measuring the translocation times of DNA modified nanoparticles as a function of packing density, length, structure, and hybridisation time, we observe a clear difference in zeta potential using both mean values, and population distributions as a function of the DNA structure. We demonstrate the ability to resolve the signals for ssDNA, dsDNA, small changes in base length for nucleotides between 15-40 bases long and even the discrimination between partial and fully complementary target sequences. Such a method has potential and applications in sensors for the monitoring of nanoparticles in both medical and environmental samples.

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“…Ohshima's theory of electrophoresis of soft spheres basically ranges from hard particles to penetrable particles. References to his work can be found in his review on EKP [140]. surface current density j str (A m -2 ) streaming current density…”

Section: Charged Particles With a Soft Uncharged Layermentioning

confidence: 99%

Measurement and Interpretation of Electrokinetic Phenomena (IUPAC Technical Report)

Delgado

González‐Caballero

Hunter

et al. 2005

Pure and Applied Chemistry

511

398

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Republication or reproduction of this report or its storage and/or dissemination by electronic means is permitted without the Measurement and interpretation of electrokinetic phenomena (IUPAC Technical Report)Abstract: In this report, the status quo and recent progress in electrokinetics are reviewed. Practical rules are recommended for performing electrokinetic measurements and interpreting their results in terms of well-defined quantities, the most familiar being the ζ-potential or electrokinetic potential. This potential is a property of charged interfaces, and it should be independent of the technique used for its determination. However, often the ζ-potential is not the only property electrokinetically characterizing the electrical state of the interfacial region; the excess conductivity of the stagnant layer is an additional parameter. The requirement to obtain the ζ-potential is that electrokinetic theories be correctly used and applied within their range of validity. Basic theories and their application ranges are discussed. A thorough description of the main electrokinetic methods is given; special attention is paid to their ranges of applicability as well as to the validity of the underlying theoretical models. Electrokinetic consistency tests are proposed in order to assess the validity of the ζ-potentials obtained. The recommendations given in the report apply mainly to smooth and homogeneous solid particles and plugs in aqueous systems; some attention is paid to nonaqueous media and less ideal surfaces.

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Electrokinetic properties, colloidal stability and aggregation kinetics of polymer colloids

Cited by 195 publications

References 352 publications

An Experimental Test of the Ion Condensation Theory for Spherical Colloidal Particles

An Experimental Test of the Ion Condensation Theory for Spherical Colloidal Particles

Particle-by-Particle Charge Analysis of DNA-Modified Nanoparticles Using Tunable Resistive Pulse Sensing

Measurement and Interpretation of Electrokinetic Phenomena (IUPAC Technical Report)

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