Ultrafast Microdroplet Generation and High-Density Microparticle Arraying Based on Biomimetic Nepenthes Peristome Surfaces,ACS Applied Materials & Interfaces

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Ultrafast Microdroplet Generation and High-Density Microparticle Arraying Based on Biomimetic Nepenthes Peristome Surfaces
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2020-10-09 , DOI: 10.1021/acsami.0c14664
Zhiting Peng ₁ , Yan Chen _{1,

2} , Tianzhun Wu _{1,

2}

Affiliation

Manipulation of massive droplets, particles, as well as cells has enabled wide applications. However, most existing technologies require complicated processes, operations, or external setup. This article demonstrates the employment of biomimetic Nepenthes peristome surfaces (NPS) in achieving ultrafast microdroplet generation and high-density microparticle arraying, with the assistance of curvature-induced Laplace pressure in slipping mode and evaporation-driven Marangoni effect in climbing mode, respectively. Different wetting phenomena on the biomimetic NPS were observed under variable contact angles and tilting angles, strongly affecting the microdroplet generation and microparticle array. As the optimal results, 5 μm-size microparticles were arrayed with 85% coverage rate in 65 s and 20 μm-size microdroplets were arrayed with 100% coverage rate in 3 s. In this study, this well-designed bionic surface shows excellent performances as an ultrafast, universal, and straightforward approach to capture and array micro-objects in aqueous solutions for various biological and chemical analyses.

中文翻译：

基于仿生猪笼草持久性表面的超快微滴生成和高密度微粒排列

大量液滴，颗粒以及细胞的操纵已实现了广泛的应用。但是，大多数现有技术需要复杂的过程，操作或外部设置。本文展示了仿生猪笼草的使用蠕动表面（NPS），分别在滑动模式下由曲率引起的拉普拉斯压力和在攀升模式下由蒸发驱动的马兰戈尼效应的帮助下，实现超快的微滴生成和高密度微粒排列。在可变的接触角和倾斜角下，在仿生NPS上观察到了不同的润湿现象，强烈影响了微滴的产生和微粒的排列。作为最佳结果，在65 s内将5μm大小的微粒排列成85％的覆盖率，在3 s内将20μm大小的微滴排列成100％的覆盖率。在这项研究中，这种经过精心设计的仿生表面表现出优异的性能，可作为一种超快，通用且直接的方法来捕获和排列水溶液中的微对象，以进行各种生物和化学分析。

更新日期：2020-10-21

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