Electric field induced charging of colloidal particles in a nonpolar liquid

Schreuer, Caspar; Vandewiele, Stijn; Strubbe, Filip; Neyts, Kristiaan; Beunis, Filip

doi:10.1016/j.jcis.2018.01.040

Cited by 8 publications

(3 citation statements)

References 38 publications

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“…In this work, we determined the effect of surface structure and chemical properties on the surface charging with nonionic surfactant used as charge control additives in nonpolar solvents. In the classic acid–base interaction theory, the density of electron acceptor (such as hydroxyl group) on the surface determined the charge strength of the surface in nonpolar solvents. ,,,, However, little attention was paid to the impact of electron donor density (e.g., adsorbed surfactant) on surface charging behavior. In this work, it was proved that the electron donor density is equally important to surface charging in nonpolar solvents.…”

Section: Discussionmentioning

confidence: 99%

Modulation of Surface Charge by Mediating Surface Chemical Structures in Nonpolar Solvents with Nonionic Surfactant Used as Charge Additives

Chen

Ashani

et al. 2021

J. Phys. Chem. C

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One of the major challenges in controlling the colloidal stability in nonpolar solvents concerns their surface charging strength. By tuning surface chemical structures in nonpolar solvents, the surface charge can be modulated with nonionic surfactants used as charge additives. In this study, various self-assembled monolayers (SAMs) were coated onto specific surfaces and nanoparticles to obtain different chemical structures. X-ray photoelectron spectroscopy (XPS) and atomic force microscope (AFM) measurements were used to quantify surface chemical structures, whereas dynamic adsorption experiments and molecular dynamics (MD) simulation were utilized to study the influence of these structures on surfactant adsorption behavior. Surface charging optimization was achieved by mediating the concentration of electron acceptors and donors, which is reflected as matching the alkyl length of SAMs with an appropriate concentration of hydroxyl group on the surfaces. The charging strength of particles decreased above a certain surfactant concentration, which is attributed to the competition between surfactant adsorption stability and charge neutralization effect generated via the disproportionation process.

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Section: Discussionmentioning

confidence: 99%

Modulation of Surface Charge by Mediating Surface Chemical Structures in Nonpolar Solvents with Nonionic Surfactant Used as Charge Additives

Chen

Ashani

et al. 2021

J. Phys. Chem. C

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“…CCAs provided dispersity and suspension to particles while CCAs assemble in RMs. In this process, some CCAs endowed the particles and RMs with charges 29,30 . The charges of the electrophoretic particles depended on the modification of particles and functional groups of CCAs.…”

Section: Charging Mechanismmentioning

confidence: 99%

Understanding the mechanisms of electronic ink operation

Yang

Zeng

et al. 2020

J Soc Info Display

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Owing to the unique features of electronic ink displays, including the bistability, paper‐like appearance, and sunlight visibility, electronic ink displays have been applied in many Internet of Things (IoT) fields. We reviewed mechanisms that have been proposed to be essential for electro‐optical behavior of electronic ink displays. This review might facilitate beginners to start their research in electronic ink studies.

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“…It is noted that when anode deposition occurred, a relatively high current density was also measured, indicating that the change in the net charge of asphaltenes from positive (cathode deposition) to negative (anode deposition) may related to electron ow. 33 When resin was introduced into the system, it signicantly inhibited the change in the net charge of the asphaltene and only cathode deposition was observed. The adsorption of resin on the asphaltene aggregates may shield the aggregate from the electron ow and require a higher electric eld strength to trigger the change in the net charge of the aggregate (anode deposition).…”

Section: The Net Charge Of Asphaltenes During Electro-depositionmentioning

confidence: 99%