Insight into molecular rearrangement of a sessile ionic nanodroplet with applied electric field

Chatterjee, Shilpi; Kumar, Indradev; Ghanta, Kartik Chandra; Hens, Abhiram; Biswas, Gautam

doi:10.1016/j.ces.2021.117083

Cited by 7 publications

(3 citation statements)

References 52 publications

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“…Kumar et al. studied the effect of external electric field on the structural and dynamic properties of sessile ionic nanodroplets [57] . Chan et al.…”

Section: Introductionmentioning

confidence: 99%

“…[56] Kumar et al studied the effect of external electric field on the structural and dynamic properties of sessile ionic nanodroplets. [57] Chan et al investigated the behavior of water nanodroplets on hydrophobic surfaces under applied electric field. [58] Liu et al found that the electric field causes the droplets to bounce, and the maximum spreading factor is enhanced by the electric field.…”

Section: Introductionmentioning

confidence: 99%

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Confinement Dynamics of Nanodroplets between Two Surfaces: Effects of Wettability and Electric Field

et al. 2022

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The electrowetting effect and related applications of tiny droplets have aroused widespread research interest. In this work, we report molecular dynamics simulations of confinement dynamics of nanodroplets under different droplet-surface interactions and surface distances under an external electric field. So far, the effect of the surface-droplet interactions on electric field-induced dynamics behaviors of droplets in confined spaces has not been extensively studied. Our results show that in the absence of electric field there is a critical value of surface wettability for the shape transition of droplets. Above this value, the droplet is divided into small droplets adhered on the bottom and top surfaces; below this value, the droplets are detached from the surfaces. When an external electric field is applied parallel to the surfaces, the droplet spreads on the surface along the direction of the electric field. It was found that the surface separation significantly influences the transition of the droplet shape. The steady morphology of the droplets under the electric field depends on the surface-droplet interaction and surface separation. We explore the underlying mechanism causing the morphological transition through analyzing the molecular interactions, the number of interracial molecules and the interaction force between the droplets and surfaces. These results provide basic insights into the molecular interactions of nanodroplets under different confined environments, and clues for applications of confined nanodroplets under the control of electric field.

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“…Kumar et al. studied the effect of external electric field on the structural and dynamic properties of sessile ionic nanodroplets [57] . Chan et al.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Confinement Dynamics of Nanodroplets between Two Surfaces: Effects of Wettability and Electric Field

et al. 2022

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“…Manipulating droplets on a solid surface with an electric field is an important micro/nanofluidic technology. Molecular dynamics studies show that solid surface properties and electric field effects can have a significant impact on the kinetic properties of ionic nanodroplets. − The wettability of the cellulose surface can be regulated by an applied electric field . The experimental method is an important tool for studying the manipulation of droplets on solid surfaces by electric fields.…”

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confidence: 99%

Transforming Droplets into Liquid Films in Nanochannels under Rotating Electric Fields Studied by Molecular Dynamics

Liu

Jing

2023

J. Phys. Chem. Lett.

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It is first proposed to use a rotating electric field to stretch a droplet into a liquid film pinned to the insulated channel inner wall as a new type of active liquid valve. The molecular dynamics (MD) simulations are performed to prove that droplets in nanochannels can be stretched and expanded into closed liquid films under the action of rotating electric fields. The variations of the liquid cross-sectional area and droplet surface energy with time are calculated. The liquid film formation occurs mainly through two modes: gradual expansion and liquid column rotation. In most cases, increasing the electric field strength and angular frequency favors liquid film closing. At higher angular frequencies, decreasing the angular interval favors liquid film closing. The opposite is true at lower angular frequencies. The process of closing the hole-containing liquid film, which has formed a dynamic equilibrium, is a surface energy increase process, which requires greater electric field strength and angular frequency.

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Enhanced controllability of droplet evaporation via DC electric field

Chen,

Gan,

Shi

2024

Chemical Engineering Journal

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Insight into molecular rearrangement of a sessile ionic nanodroplet with applied electric field

Cited by 7 publications

References 52 publications

Confinement Dynamics of Nanodroplets between Two Surfaces: Effects of Wettability and Electric Field

Confinement Dynamics of Nanodroplets between Two Surfaces: Effects of Wettability and Electric Field

Transforming Droplets into Liquid Films in Nanochannels under Rotating Electric Fields Studied by Molecular Dynamics

Enhanced controllability of droplet evaporation via DC electric field

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