Silver-Based Self-Powered pH-Sensitive Pump and Sensor
Silver-Based Self-Powered pH-Sensitive Pump and Sensor
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DOI：
10.1021/acs.langmuir.0c01240
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发表时间：
2020-07-14
期刊：
影响因子：
3.9
通讯作者：
Sen, Ayusman
中科院分区：
文献类型：
--
作者：
Gentile, Kayla;Maiti, Subhabrata;Sen, Ayusman
非机械纳米/微米级泵，提供精确的流量控制，而无需外部电源的帮助，并能够打开响应于溶液中的特定分析物是下一代的智能微型和纳米级设备所需要的。本文报道了一种基于过氧化氢（H2 O2）两步催化分解的自供电化学驱动银微泵。可以通过调节溶液pH来控制泵送方向和速度，并且建模和理论允许将反应步骤的动力学与流体速度相关联。此外，通过使用葡萄糖氧化酶（GOx）催化的葡萄糖氧化成葡萄糖酸来动态地改变pH，可以原位改变流体泵送的方向，从而允许葡萄糖传感器的设计。这项工作强调了催化泵的多功能性及其作为传感器的能力。
Nonmechanical nano/microscale pumps that provide precise control over flow rate without the aid of an external power source and that are capable of turning on in response to specific analytes in solution are needed for the next generation of smart micro- and nanoscale devices. Herein, a self-powered chemically driven silver micropump is reported that is based on the two-step catalytic decomposition of hydrogen peroxide, H2O2. The pumping direction and speed can be controlled by modulating the solution pH, and modeling and theory allow for the kinetics of the reaction steps to be connected to the fluid velocity. In addition, by changing the pH dynamically using glucose oxidase (GOx)-catalyzed oxidation of glucose to gluconic acid, the direction of fluid pumping can be altered in situ, allowing for the design of a glucose sensor. This work underscores the versatility of catalytic pumps and their ability to function as sensors.