Sequential deposition of polydisperse particles with double layer interactions: An integral-equation theory

Danwanichakul, Panu; Charinpanitkul, Tawatchai

doi:10.1016/j.physa.2009.09.004

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…For 84 nm particles, the packing density was 0.2, while for 780 nm particles it increased to 0.8 . Other studies examined the effect of particle size polydispersity. − They found that the distribution of particles on the surface may differ significantly from the solution composition . The maximal packing density increases with increasing size asymmetry in both two dimensions and three dimensions, , although the effect in two dimensions is weaker.…”

Section: Introductionmentioning

confidence: 99%

Effect of Colloidal Particle Size on Adsorbed Monodisperse and Bidisperse Monolayers

Rosenberg

Dan

2011

Langmuir

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Coating hydrogel films or microspheres by an adsorbed colloidal shell is one synthesis method for forming colloidosomes. The colloidal shell allows control of the release rate of encapsulated materials, as well as selective transport. Previous studies found that the packing density of self-assembled, adsorbed colloidal monolayers is independent of the colloidal particle size. In this paper we develop an equilibrium model that correlates the packing density of charged colloidal particles in an adsorbed shell to the particle dimensions in monodisperse and bidisperse systems. In systems where the molar concentration in solution is fixed, the increase in adsorption energy with increasing particle size leads to a monotonic increase in the monolayer packing density with particle radius. However, in systems where the mass fraction of the particles in the adsorbing solutions is fixed, increasing particle size also reduces the molar concentration of particles in solution, thereby reducing the probability of adsorption. The result is a nonmonotonic dependence of the packing density in the adsorbed layer on the particle radius. In bidisperse monolayers composed of two particle sizes, the packing density in the layer increases significantly with size asymmetry. These results may be utilized to design the properties of colloidal shells and coatings to achieve specific properties such as transport rate and selectivity.

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Section: Introductionmentioning

confidence: 99%

Effect of Colloidal Particle Size on Adsorbed Monodisperse and Bidisperse Monolayers

Rosenberg

Dan

2011

Langmuir

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“…The structure of a monolayer film could also be obtained and represented by the radial distribution function which illustrates the probability of finding a particle at any radial position from the center particle. Some works [ 13 – 15 ] were focused on the adsorption of particles on homogeneous surfaces of which any position was assumed to possess uniform surface energy, thereby, particles being attached on the surface at random. In real applications, however, adsorption occurs on surfaces upon which some regions may be modified chemically or physically by coating with a polymer, a surfactant, or a chemical coupling agent such as silane which could change the surface charges [ 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Monte Carlo Simulation of Protein Adsorption on Energetically Heterogeneous Surfaces

Danwanichakul

2014

BioMed Research International

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The modified triangular-well potential model was applied to incorporate the effect of surface energy on the adsorption of particles or proteins on energetically heterogeneous surfaces. The method is convenient in simulating the adsorption on heterogeneous surface of which different region possesses different free energy. Spherical particles with attractive forces were added on the surface and underwent surface diffusion before they were quenched in place. It was seen that the ratio of surface energies of two regions had to be greater than 10 in order to simulate the adsorption in which the particles were selectively adsorbed on a favorable area. At a fixed ratio of surface energies, the obtained structures were similar. If the ratio was less than 10, the probability of adsorption on any site on the surface was not much different so the adsorption would be homogeneous adsorption. The method, thus, could be applied widely to simulate the adsorption of various conditions.

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Creation and gene expression analysis of a giant embryo rice mutant with high GABA content

et al. 2023

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Gamma-amino butyric acid (GABA) is a natural non-protein amino acid involved in plant stress, signal transmission, carbon and nitrogen balance, and other physiological effects in plants. In the human body, it has the effects of lowering blood pressure, anti-aging, and activating the liver and kidney. However, there are few studies on the molecular regulation mechanism of genes in the metabolic pathways of GABA during grain development of giant embryo rice with high GABA content. In this study, three glant embryo (ge) mutants of different embryo sizes were obtained by CRISPR/Cas9 knockout, and it was found that GABA, protein, crude fat, and various mineral contents of the ge mutants were signi cantly increased. RNA-seq and qRT-PCR analysis showed that in the GABA shunt and polyamine degradation pathway, the expression levels of most of genes encoding enzymes promoting GABA accumulation were signi cantly upregulated in the ge-1 mutant, while the expression levels of most of genes encoding enzymes conducive to GABA degradation were signi cantly downregulated in the ge-1 mutant. This is most likely responsible for the signi cant increase in GABA content of the ge mutant. These results are helpful in revealing the molecular regulatory network of GABA metabolism in giant embryo rice and provide a theoretical basis for the study of its development mechanisms, which is conducive to the rapid cultivation of GABA-rich rice varieties, promoting human nutrition, and ensuring health.

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Sequential deposition of polydisperse particles with double layer interactions: An integral-equation theory

Cited by 5 publications

References 20 publications

Effect of Colloidal Particle Size on Adsorbed Monodisperse and Bidisperse Monolayers

Effect of Colloidal Particle Size on Adsorbed Monodisperse and Bidisperse Monolayers

Monte Carlo Simulation of Protein Adsorption on Energetically Heterogeneous Surfaces

Creation and gene expression analysis of a giant embryo rice mutant with high GABA content

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