Evaporation-driven directed motion of droplets on the glass

Nuthalapati, Karthik; Sheng, Yu Jane; Tsao, Heng Kwong

doi:10.1016/j.surfin.2023.102811

Cited by 3 publications

(1 citation statement)

References 42 publications

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“…[1][2][3][4][5] The manipulation of droplets in oil has garnered significant attention for its ability to prevent cross-contamination, avoid dispersion, enhance contact angles, and minimize evaporation. [6,7] This has propelled the exploration of electronically controlled droplets, [6][7][8][9][10][11] which offer notable benefits in terms of low power consumption, fast response time, and scalability, distinguishing them from the approaches based on magnetic field, [12] light-driven, [13] acoustic/ultrasonic tweezers, [14,15] thermal evaporation, [16] and bio-wettability. [17] However, obligatory external power supplies make them vulnerable to shortcircuiting.…”

Section: Introductionmentioning

confidence: 99%

Mechano‐Driven Tribo‐Electrophoresis Enabled Human–Droplet Interaction in 3D Space

et al. 2023

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Electronically controlled droplet manipulation has widespread applications in biochemistry, life sciences and industry. However, current technologies such as electrowetting, electrostatics, and surface charge printing rely on complex electrode arrays and external power supplies, leading to inefficient manipulation. In light of these limitations, w e propose a novel method that leverages tribo‐electrophoresis (TEP) to pipette in an oil medium, thereby enabling human‐droplet interactions to be constructed with greater efficiency. O ur approach involves in the rational design of a triboelectric nanogenerator‐electrostatic tweezer that generates an electric field to charge the droplet and improves the maneuverability of the charged droplet, including aligned/non‐aligned pipetting, stable transport in clamped state, which can be accomplished solely by hand motion. The TEP method not only provides droplets with the freedom to move in three dimensions, but also offers a feasibility case for chemical reactions in the liquid phase and non‐invasive sample extraction. This breakthrough establishes a cornerstone for human‐droplet interactions capitalized on triboelectric nanogenerators, opening new avenues for research in droplet manipulation.This article is protected by copyright. All rights reserved

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