Catalytic Microtubular Jet Engines Self-Propelled by Accumulated Gas Bubbles
Catalytic Microtubular Jet Engines Self-Propelled by Accumulated Gas Bubbles
复制标题
DOI：
10.1002/smll.200900021
复制
发表时间：
2009-07-17
期刊：
影响因子：
13.3
通讯作者：
Schmidt, Oliver G.
中科院分区：
文献类型：
--
作者：
Solovev, Alexander A.;Mei, Yongfeng;Schmidt, Oliver G.
具有内催化表面的应变工程微管用作自行式微喷气发动机，速度高达约2毫米S(-1)(约50身体每秒长度)。微射流的运动是由气泡从管口射出引起的，其速度可以用气泡半径与气泡射出频率的乘积很好地近似。长长的微气泡尾巴很好地显示了各种不同几何形状的轨迹。如果将磁层集成到微喷气发动机的壁面上，我们可以通过施加外部旋转磁场来控制和定位轨迹。揭示了通过微管泵送的液体(即燃料)，并直接阐明了催化微喷射发动机的工作原理。
Strain-engineered microtubes with an inner catalytic surface serve as self-propelled microjet engines with speeds of up to approximate to 2 mm s(-1) (approximately 50 body lengths per second). The motion of the microjets is caused by gas bubbles ejecting from one opening of the tube, and the velocity can be well approximated by the product of the bubble radius anti the bubble ejection frequency. Trajectories of various different geometries are well visualized by long microbubble tails. If a magnetic layer is integrated into the wall of the microjet engine, we can control and localize the trajectories by applying external rotating magnetic fields. Fluid (i.e., fuel) pumping through the microtubes is revealed and directly clarifies the working principle of the catalytic microjet engines.