微/纳米冰镊操作器执行过程的数值模拟

冰镊是一种借助于针尖与作用对象之间形成的极微小冰晶来实现对物体灵巧操纵的微/纳米操作技术,应用该器件不仅可以实现如拾取、摆放等简单动作,更可以方便地实施如拉伸、旋转等复杂操作,且不受对象的形状、带电与否、重量、材料以及质地等限制,并可与其它机构结合,组成微观意义上的自动化设备.针对冰镊的工作原理,基于相应的流体力学及传热学数学模型,从数值计算角度对微纳米尺度下冰镊的执行过程进行了模拟,在此基础上可望更好地理解冰镊的工作状态及控制过程,从而有助于设计优化新的微/纳米冰镊器件.

Numerical Simulation on Operating Process of Freeze Tweezer for Manipulation of Micro/Nano Objects

As a new kind of micro/nano manipulation tool, freeze tweezer was enabled by using the freezing force of a small volume of nucleotide ice to manipulate micro/nano objects. It allows not only the simple actions such as picking-up, releasing, but also the complex manipulations like pulling and rotating objects with any shape, electric charge, weight, material or character. Such device can be integrated with other machines so as to construct certain automatic facility in micro sense. Following the working principle of the freeze tweezer, this paper is aimed to numerically simulate the operation behaviors of the freeze tweezer by using the corresponding fluid mechanics and heat transfer models. Through this comprehensive analysis, the working features and controlling activities of such device can be well understood, which allows for further designing and optimization of the micro/nano freeze tweezers.