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Publication Citation: Simultaneous Positioning and Orientation of a Single Nano-object by Flow Control: theory and simulations

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Author(s): Pramod P. Mathai; Andrew J. Berglund; James A. Liddle; Benjamin Shapiro;
Title: Simultaneous Positioning and Orientation of a Single Nano-object by Flow Control: theory and simulations
Published: January 19, 2011
Abstract: In this paper we describe a method to simultaneously control both the position and orientation of single nano-objects in fluids by precisely controlling the flow around them. We develop and simulate a control law that uses electro-osmotic flow (EOF) actuation to translate and rotate rigid nano-objects in two spatial dimensions. Using EOF to control nano-objects offers advantages as compared to other approaches: a wide class of objects can be manipulated (no magnetic or electric dipole moments are needed), the object can be controlled over a long range (> 100 microns) with sub-micron accuracy, and control is achieved using a simple polydimethylsiloxane (PDMS) device. We demonstrate the theory and numerical solutions that will enable deterministic control of the position and orientation of a nano-object in solution, which can be used for example, to integrate nanostructures in circuits and orient sensors to probe living cells.
Citation: New Journal of Physics
Volume: 13
Pages: 27 pp.
Keywords: Flow control; electro-osmotic flow; position; orientation; nano-objects
Research Areas: Nanofluidics
PDF version: PDF Document Click here to retrieve PDF version of paper (943KB)