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请问脉冲电解对电浸润有什么样的影响呢？有相关的文献吗已有1人参与
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请问脉冲电解对电浸润有什么样的影响呢？有相关的文献吗 @Gamry-电化学 发自小木虫手机客户端 |
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文献 1： The transient dynamics of actuating droplets exhibit either underdamped or overdamped behaviour; the overdamped-to-underdamped (O-U) transition is insensitive to the applied voltage U, but is strongly dependent on the droplet size R and liquid viscosity μ. https://www.nature.com/articles/s41598-018-19167-7 2： A Combined Pulse Driving Waveform With Rising Gradient for Improving the Aperture Ratio of Electrowetting Displays https://www.frontiersin.org/jour ... hy.2021.709151/full AI中文答复， 不一定完全正确。 AI： 脉冲电解能够通过控制脉冲参数（如电压、频率、占空比）来调节电浸润行为。这种方法可以提高润湿性、减小浸润接触角、促进浸润和转移，甚至实现对液滴的精准操控。相比于直流电浸润，脉冲电解在某些情况下能提供更快的响应速度和更好的稳定性。 具体影响包括： 更快的响应速度： 脉冲电解的快速开关特性可以更快地改变电介质表面的电荷状态，从而实现更快的润湿或去湿过程。 更好的稳定性： 通过控制电化学反应的程度，脉冲电解可以避免电解过程中产生的副产物积累，维持更稳定的浸润效果。 降低功耗： 在脉冲模式下，可以在短时间内施加高电压，但总能量消耗可能低于连续施加相同效果的直流电压，因此在某些应用中更具优势。 实现精准控制： 通过调整脉冲参数，可以精确控制液滴的铺展、收缩以及转移，从而实现对微流控器件或印刷技术中液滴的精确操控。 改善润湿性： 脉冲电场可以加速表面极化过程，促进液体在表面的吸附和铺展，从而降低液滴与表面的接触角，改善润湿性。 总而言之，脉冲电解是一种通过精细调节电参数来增强和控制电浸润现象的有效手段，在微纳加工、生物传感和显示技术等领域具有广泛的应用前景。 AI 英文： Pulse power on electrowetting (EW) involves using short, high-energy electrical pulses instead of a continuous DC voltage to manipulate liquid droplets on a surface. This technique addresses key challenges in EW, such as charge trapping and droplet instability, resulting in better performance for applications like electronic displays and microfluidics. Benefits of using pulsed power Mitigates charge trapping: Continuous DC voltage can cause charge to accumulate in the dielectric layer separating the liquid and electrode, pinning the droplet in place and slowing the device's response time. The short, alternating pulses used in pulsed power effectively neutralize these trapped charges, improving long-term stability and enabling a faster, more consistent response. Improves stability and performance: In electrowetting displays (EWDs), a pulsed waveform with a rising voltage gradient can be used to control the movement of oil films. This prevents the oil from dispersing too quickly and causes the droplets to coalesce more effectively, leading to a more stable display state and a higher aperture ratio (the percentage of the pixel that is white). Enhances droplet movement: In digital microfluidics, pulsed actuation can achieve higher average droplet transport velocities than a conventional DC signal by matching the electrical pulse with the droplet's natural dynamics. Pulsing can also be used to enhance specific behaviors, such as a droplet "jumping" off a surface after coalescence. Eliminates hysteresis: Pulsed power can overcome contact-angle hysteresis caused by surface imperfections. In some systems, small voltage pulses added to a steady bias can provide enough energy to "depin" the contact line, allowing the droplet to move smoothly and predictably. Enables portable applications: Using piezoelectric elements to convert mechanical energy from a finger tap into voltage pulses allows for a pulse-driven system that does not require an external power supply. This is a practical solution for portable electrowetting devices in applications like diagnostic tests. Key pulsed waveform techniques Rising gradient pulse: Used primarily in electrowetting displays to achieve a more stable and higher aperture ratio. The voltage is increased with a rising gradient to control the oil film's rupture, followed by a pulse waveform to prevent trapped charges from causing the oil to flow back. Natural discharge after pulse (NDAP): A pulse actuation technique for digital microfluidics that speeds up droplet transport. It uses a short pulse to initiate movement, followed by a natural discharge, which helps control the droplet's dynamics. Combined pulse and bias: This approach adds small, short voltage pulses to a steady DC bias. The pulses provide bursts of energy that help the droplet overcome surface friction and hysteresis, enabling more precise control over its movement. High-frequency AC pulsing: For applications like water harvesting, high-frequency bursts of AC voltage can be used to actively bash smaller droplets together. This accelerates coalescence, helping to form larger, more mobile droplets. |
2楼2025-08-30 02:47:20