On progress in forces since the DLVO theory

Ninham, Barry W.

doi:10.1016/s0001-8686(99)00008-1

Cited by 339 publications

(228 citation statements)

References 27 publications

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“…The assumptions most flagrantly violated are that the colloidal surface is molecularly smooth, solid, and inert. Detailed critical assessment of assumption validity can be found in Ninham [84]. The unsuitability of the DLVO theory (or its extensions) is supported by direct measurements of the interaction forces between bacteria and solid surfaces obtained via atomic force microscopy.…”

Section: Understanding the Interaction Potential: Is The Dlvo Approprmentioning

confidence: 99%

“…Although the DLVO theory is a useful paradigm for thinking about the interactions between microorganisms and solid surfaces, Ninham [84] has pointed out that it applies only for certain well defined conditions that are not in general met for microbial cells. The assumptions most flagrantly violated are that the colloidal surface is molecularly smooth, solid, and inert.…”

Section: Understanding the Interaction Potential: Is The Dlvo Approprmentioning

confidence: 99%

See 1 more Smart Citation

Processes in microbial transport in the natural subsurface

Ginn

Wood

Nelson

et al. 2002

Advances in Water Resources

262

131

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Section: Understanding the Interaction Potential: Is The Dlvo Approprmentioning

confidence: 99%

Section: Understanding the Interaction Potential: Is The Dlvo Approprmentioning

confidence: 99%

Processes in microbial transport in the natural subsurface

Ginn

Wood

Nelson

et al. 2002

Advances in Water Resources

262

131

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“…When interactions of ions with the curved nanoenvironment of NPs are generally discussed, most applied models, e.g. the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory [58,59] are based on continuum effects considering ions as point charges [60]. However, effects considering the nature of the used ions, namely specific ion effects, are often disregarded, though they may be of high importance for example for the colloidal stability of the NPs.…”

Section: Introductionmentioning

confidence: 99%

Interaction of colloidal nanoparticles with their local environment: the (ionic) nanoenvironment around nanoparticles is different from bulk and determines the physico-chemical properties of the nanoparticles

Pfeiffer

Rehbock

Hühn

et al. 2014

J. R. Soc. Interface.

314

291

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The physico-chemical properties of colloidal nanoparticles (NPs) are influenced by their local environment, as, in turn, the local environment influences the physico-chemical properties of the NPs. In other words, the local environment around NPs has a profound impact on the NPs, and it is different from bulk due to interaction with the NP surface. So far, this important effect has not been addressed in a comprehensive way in the literature. The vicinity of NPs can be sensitively influenced by local ions and ligands, with effects already occurring at extremely low concentrations. NPs in the Hü ckel regime are more sensitive to fluctuations in the ionic environment, because of a larger Debye length. The local ion concentration hereby affects the colloidal stability of the NPs, as it is different from bulk owing to Debye Hü ckel screening caused by the charge of the NPs. This can have subtle effects, now caused by the environment to the performance of the NP, such as for example a buffering effect caused by surface reaction on ultrapure ligandfree nanogold, a size quenching effect in the presence of specific ions and a significant impact on fluorophore-labelled NPs acting as ion sensors. Thus, the aim of this review is to clarify and give an unifying view of the complex interplay between the NP's surface with their nanoenvironment.

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“…The DLVO theory has been criticized over decades from a statistical mechanics viewpoint. 3 The main arguments, which go against validity of the DLVO theory, are the finite ion-size and electrostatic correlation effect ignored by the Boltzmann statistics, a linearization approximation of the PB equation, and the Derjaguin approximation 4 incurred to estimate forces between two spherical colloids by using an interaction between two flat surfaces. Although drawbacks of the Boltzmann distribution can be effectively corrected by a classical density functional theory (DFT), 5 and the linearization approximation is also removed by numerically solving the PB equation, the Derjaguin approximation is still and commonly used to calculate the EPMF between curved surfaces.…”

Section: Introductionmentioning

confidence: 99%

Novel anomalies for like-charged attraction between curved surfaces and formulation of a hydrogen bonding style mechanism

Zhou

2013

AIP Advances

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For the first time, the classical density functional theory (DFT) is numerically solved in three-and two-dimensional spaces for a two sphere model of electrostatic interactions between two spherical nanoscale colloids immersed in a primitive model electrolyte solution. Two scientific anomalies are found that (i) contrary to what is often asserted that presence of multivalent counter ion is necessary to induce a like-charge attraction (LCA), univalent counter ion also induces the LCA only if bulk electrolyte concentration and colloid surface charge are high enough, and (ii) although the LCA in general becomes stronger with the bulk electrolyte concentration, adverse effects unexpectedly occur if the colloid surface charge quantity rises sufficiently. In addition, effects of counter ion and co-ion diameters in eliciting the LCA are first investigated and several novel phenomena such as monotonic and non-monotonic dependence of the LCA well depth on the counter ion diameter in different colloid surface charge zones are confirmed. Based these findings, a hydrogen bonding style mechanism is suggested and surprisingly, by appealing to fairly common-sense concepts such as bond energy, bond length, number of hydrogen bonds formed, and counter ion single-layer saturation adsorption capacity, self-consistently explains origin of the LCA between two spherical nanoscale particles, and all phenomena previously reported and observed in this study.

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On progress in forces since the DLVO theory

Cited by 339 publications

References 27 publications

Processes in microbial transport in the natural subsurface

Processes in microbial transport in the natural subsurface

Interaction of colloidal nanoparticles with their local environment: the (ionic) nanoenvironment around nanoparticles is different from bulk and determines the physico-chemical properties of the nanoparticles

Novel anomalies for like-charged attraction between curved surfaces and formulation of a hydrogen bonding style mechanism

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