Roujuan Li, Xiang Li, Zhiwei Zhang, Morten Willatzen, Zhong Lin Wang, Di Wei
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引用次数: 0
Abstract
Programmed droplet transport which is typically directed by surface energy gradients or external fields, is crucial in domains ranging from chemical reaction modulation to self-powered intelligent sensing. However, droplet motion control remains constrained by path reconfiguration, requirements on chemical surface modification, and platform complexity. Here, a more universal plug-and-play droplet manipulation paradigm based on liquid-solid contact electrification and triboelectricwetting on common dielectric surfaces is reported. By regulating the electrical double layer via asymmetric ion dynamics, the triboelectric charge polarity of droplets can be adjusted, enabling in situ manipulation without path reconfiguration dictated by the conventional droplet motion output. Droplets achieved an ultrahigh velocity of 450 mm s−1 on general surfaces, significantly exceeding the speeds observed in droplets subjected to constant electrostatic fields with chemical modifications. This flexible and modular functionally decoupled manipulation strategy offers an environmentally friendly, cost-effective, and versatile paradigm, facilitating applications in chemical analysis and smart sensing.
程序化液滴传输通常由表面能量梯度或外部场引导,在从化学反应调制到自供电智能传感等领域至关重要。然而,液滴运动控制仍然受到路径重新配置、化学表面改性要求和平台复杂性的限制。本文报告了一种基于普通电介质表面的液固接触电化和三电润湿的更通用的即插即用液滴操纵范例。通过非对称离子动力学调节电双层,液滴的三电荷极性可以调整,从而实现原位操纵,而无需根据传统液滴运动输出重新配置路径。液滴在一般表面上达到了 450 mm s-1 的超高速度,大大超过了在恒定静电场下观察到的液滴速度。这种灵活的模块化功能解耦操纵策略提供了一种环境友好型、经济高效且用途广泛的范例,有助于化学分析和智能传感领域的应用。
期刊介绍:
Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week.
Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.