Over the past century, adsorption has been investigated extensively in equilibrium systems with a focus on the van der Waals interactions associated with physisorption and electronic interactions in the case of chemisorption. Here, we demonstrate mechanisorption, which results from nonequilibrium pumping to form mechanical bonds between the adsorbent and the adsorbate. This active mode of adsorption has been realized on surfaces of metal-organic frameworks grafted with arrays of molecular pumps. Adsorbates are transported from one well-defined compartment—the bulk—to another well-defined compartment—the interface—thereby creating large potential gradients in the form of chemical capacitors wherein energy is stored in metastable states. Mechanisorption extends, in a fundamental manner, the scope and potential of adsorption phenomena and offers a transformative approach to control chemistry at surfaces and interfaces.

中文翻译：

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由泵送盒驱动的主动机械吸附

在过去的一个世纪里，吸附在平衡系统中得到了广泛的研究，重点是与物理吸附相关的范德华相互作用和化学吸附情况下的电子相互作用。在这里，我们展示了机械吸附，这是由于非平衡泵送在吸附剂和被吸附物之间形成机械键的结果。这种活性吸附模式已在接枝有分子泵阵列的金属有机框架表面上实现。吸附物从一个明确定义的隔间（主体）传输到另一个明确定义的隔间（界面），从而以化学电容器的形式产生大的电位梯度，其中能量以亚稳态存储。机械吸附从根本上扩展，