A capillary microgripper based on electrowetting

Vasudev, Abhay; Jiang Zhe
September 2008
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p103503
Academic Journal
An electrowetting based capillary microgripper, which can pick up and release micro-objects, is presented. Electrowetting was utilized to dynamically change the contact angle between the liquid bridge and the gripper surface to control the capillary lifting forces. A coplanar interdigitated gold electrode pair was employed to simplify the microfabrication. The lifting force generated by the microgripper was experimentally characterized. The pickup and release routine was demonstrated for various micro glass beads whose weight ranges from 77 to 136 μN. The design, microfabrication, and testing of the microgripper are presented.


Related Articles

  • Lasers carve precision microscale features. Lerner, Eric J. // Laser Focus World;Sep99, Vol. 35 Issue 9, p87 

    Describes laser-micromachining systems. System components; Other techniques for creating small devices; Information on chemical micromachining; System applications.

  • Stiction-controlled locking system for three-dimensional self-assembled microstructures: Theory and experimental validation. Agache, Vincent; Que´vy, Emmanuel; Collard, Dominique; Buchaillot, Lionel // Applied Physics Letters;12/3/2001, Vol. 79 Issue 23, p3869 

    The premise of our study lies in the controlled use of the phenomenon of stiction to lock three-dimensional self-assembled polycrystalline silicon (polysilicon) microstructures. The stiction refers to the permanent adhesion of the microstructures to adjacent surfaces. It can occur either during...

  • How to understand MEMS. Goldberg, Howard // R&D Magazine;Jun2002, Vol. 44 Issue 6, p37 

    Provides tips on how to understand the microelectromechanical systems (MEMS). Processes for producing MEMS; Challenges faced by MEMS producers; Methods of micromachining.

  • Roadmap Offers Standards, Solutions for MEMS/MST Industry. Walsh, Steven // R&D Magazine;Jul2001, Vol. 43 Issue 7, p25 

    Deals with the International Microsystems Roadmap which assists in the development of microsystems, microelectromechanical systems and micromachining. Challenges of preparing the roadmap; Disadvantage of discontinuous innovations; Discussion on downstream infrastructure; Chapters of the roadmap.

  • Microdicing tools for MEMS.  // R&D Magazine;Feb2003, Vol. 45 Issue 2, p57 

    Reports on the diffractive optic dicing tool for micro polymer tubing found in microelectromechanical system. Features of the tool.

  • Electrowetting on gold electrodes with microscopic three-dimensional structures for microfluidic devices. Yokomaku, Hiroomi; Satoh, Wataru; Fukuda, Junji; Suzuki, Hiroaki // Journal of Applied Physics;Sep2008, Vol. 104 Issue 6, p064910 

    To improve the performance of electrowetting-based microfluidic devices, we used micropillar structures to enhance the changes in the wettability of gold electrodes. The changes in the contact angle of a sessile drop were influenced by the diameter of the micropillars and interpillar distances....

  • Micromachined analogue of human cochlea drums up hope for the deaf. Bush, Steve // Electronics Weekly;11/16/2005, Issue 2218, p7 

    This article informs that researchers at the University of Michigan are working on a micromachined analogue of the human cochlea. Robert White, who is now working at Tufts University in Massachusetts, says that they talk about it partly as a model of the cochlea and partly as a novel...

  • Automatic microinspection improves quality. Teoman, Emre // Laser Focus World;Sep99, Vol. 35 Issue 9, pS11 

    Discusses developments in automatic microinspection. Process variation in micromachining; Components of automatic microinspection systems; Basic elements to obtain good image quality in video microscopy.

  • Medical micro-machining. Kalman, Sara // T & P: Tooling & Production;Sep2002, Vol. 68 Issue 9, p42 

    Focuses on the micro-machining of medical tools. Use of microelectromechanical system; Computer aided design of a high-precision, pre-assembled miniature metal part in a short amount of time; Process flow for fabrication of a single two-material layer.


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics