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首页> 外文期刊>Advanced Functional Materials >Stretchable Chemical Patterns for the Assembly and Manipulation of Arrays of Microdroplets with Lensing and Micromixing Functionality
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Stretchable Chemical Patterns for the Assembly and Manipulation of Arrays of Microdroplets with Lensing and Micromixing Functionality

机译：具有透镜和微混合功能的可组装和操纵微滴阵列的可拉伸化学图案

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摘要

The chemical properties of a surface are readily controlled using a layer (or layers) of surface-functional groups that can be generated with, for example, self-assembled monolayers (SAMs) or polymer brushes. These methods have enabled rational control over surface chemistry, which directly impacts surface properties, such as wettability, but generally follow a serial approach to building up surface-functional groups (i.e., separate chemical steps are needed for the initial and each subsequent surface modification). This paper describes systems based on soft materialsstretchable chemical patternsthat have surface properties that are easily and reversibly modified using mechanical deformations. These systems couple surface-chemical features such as the density and arrangement of functional groups on elastomeric polymers (e.g., polydimethylsiloxane) to mechanically induced surface deformations. This approach enables rapid and reversible control of surface chemistry and thus surface properties and processes. The behavior of these systems is characterized using fluorescent molecules and their utility illustrated through the organization and manipulation of arrays of micrometer-scale droplets, which have optical and small-volume mixing functionalities applicable to microlens and microreactor technologies, respectively. The capabilities of these systems may be extended to, for example, the control of heterogeneous nucleation, surface reactivity, and microanoscale assembly.
机译：使用可通过例如自组装单层（SAMs）或聚合物刷生成的表面官能团的一层或多层表面，可以轻松控制表面的化学性质。这些方法可以合理控制表面化学性质，直接影响表面性质，如润湿性，但通常遵循一系列方法来建立表面官能团（即，初始和随后的表面修饰需要单独的化学步骤） 。本文介绍了基于软材料可拉伸化学图案的系统，这些化学图案具有可通过机械变形轻松且可逆地修改的表面特性。这些系统将表面化学特征，例如弹性体聚合物（例如，聚二甲基硅氧烷）上官能团的密度和排列与机械诱导的表面变形结合在一起。这种方法可以快速，可逆地控制表面化学性质，从而控制表面性质和工艺。这些系统的行为通过荧光分子及其实用性来表征，这些荧光分子的实用性通过微米级液滴阵列的组织和操纵来说明，这些液滴具有分别适用于微透镜和微反应器技术的光学和小体积混合功能。这些系统的功能可以扩展到例如异相成核，表面反应性和微米/纳米级组装的控制。

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