Dey Krishna Kanti, Sharma Deepika, Basu Saurabh, Chattopadhyay Arun
Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, India.
J Chem Phys. 2008 Sep 28;129(12):121101. doi: 10.1063/1.2985610.
The motion of micron-sized catalytic polymer beads coated with thin film or nanoparticle form of Ni in aqueous H(2)O(2) is reported herein. In the absence of any magnetic field, the beads moved vertically upward in the medium, owing to sufficient bubbles deposited on them following catalytic decomposition of H(2)O(2) by Ni. However, in the presence of an external magnetic field (perpendicular to the direction of motion), angular deviation in the motion is observed, with the deviations increasing with the strength of the field. The results are explained based on a model involving interaction of the beads with the external magnetic field.
本文报道了涂有薄膜或镍纳米颗粒形式的微米级催化聚合物珠粒在水性过氧化氢中的运动情况。在没有任何磁场的情况下，由于镍催化分解过氧化氢后有足够的气泡沉积在珠粒上，珠粒在介质中垂直向上移动。然而，在存在外部磁场（垂直于运动方向）的情况下，观察到运动中的角度偏差，且偏差随磁场强度的增加而增大。基于涉及珠粒与外部磁场相互作用的模型对结果进行了解释。
