State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY, 12180-3590, USA.
Adv Sci (Weinh). 2024 Mar;11(12):e2307020. doi: 10.1002/advs.202307020. Epub 2024 Jan 18.
Control of convection plays an important role in heat transfer regulation, bio/chemical sensing, phase separation, etc. Current convection controlling systems generally depend on engineered energy sources to drive and manipulate the convection, which brings additional energy consumption into the system. Here the use of human hand as a natural and sustainable infrared (IR) radiation source for the manipulation of liquid convection is demonstrated. The fluid can sense the change of the relative position or the shape of the hand with the formation of different convection patterns. Besides the generation of static complex patterns, dynamic manipulation of convections can also be realized via moving of hand or finger. The use of such sustainable convections to control the movement of a floating "boat" is further achieved. The use of human hands as the natural energy sources provides a promising approach for the manipulation of liquid convection without the need of extra external energy, which may be further utilized for low-cost and intelligent bio/chemical sensing and separation.
控制对流在传热调节、生物/化学传感、相分离等方面起着重要作用。目前的对流控制系统通常依赖于工程能源来驱动和操纵对流，这给系统带来了额外的能源消耗。在这里，我们展示了用人手作为自然和可持续的红外（IR）辐射源来操纵液体对流。流体可以通过形成不同的对流模式来感知手的相对位置或形状的变化。除了产生静态复杂图案外，通过移动手或手指也可以实现对流的动态操纵。进一步利用这种可持续的对流来控制漂浮“船”的运动。用人手作为自然能源为无需额外外部能量的液体对流控制提供了一种很有前途的方法，这可能进一步用于低成本和智能的生物/化学传感和分离。
