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Peptide-Metal Organic Framework Swimmers that Direct the Motion toward Chemical Targets

机译：肽金属有机骨架游泳者，将运动引向化学目标

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Highly efficient and robust chemical motors are expected for the application in microbots that can selectively swim toward targets and accomplish their tasks in sensing, labeling, and delivering. However, one of major issues for such development is that current artificial swimmers have difficulty controlling their directional motion toward targets like bacterial chemotaxis. To program synthetic motors with sensing capability for the target-directed motion, we need to develop swimmers whose motions are sensitive to chemical gradients in environments. Here we create a new intelligent biochemical swimmer by integrating metal organic frameworks (MOFs) and peptides that can sense toxic heavy metals in solution and swim toward the targets. With the aid of Pb-binding enzymes, the peptide-MOF motor can directionally swim toward PbSe quantum dots (QD) by sensing pH gradient and eventually complete the motion as the swimmer reaches the highest gradient point at the target position in solution. This type of technology could be evolved to miniaturize chemical robotic systems that sense target chemicals and swim toward target locations.
机译：期望在微型机器人中应用高效，坚固的化学电机，这些机器人可以有选择地向目标游动并完成其感测，标记和传递任务。然而，这种发展的主要问题之一是当前的人工游泳者难以控制其朝向诸如细菌趋化性之类的目标的定向运动。为了对具有定向目标运动感测能力的合成马达进行编程，我们需要开发游泳者，其运动对环境中的化学梯度敏感。在这里，我们通过整合金属有机骨架（MOF）和能够感知溶液中有毒重金属并向目标游泳的肽，创建了一种新型的智能生化游泳者。借助Pb结合酶，肽MOF电机可以通过感应pH梯度而定向向PbSe量子点（QD）方向运动​​，并在游泳者到达溶液中目标位置的最高梯度点时最终完成运动。可以发展这类技术来使化学机器人系统小型化，该系统可以感应目标化学物质并向目标位置游泳。

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