Showing papers by "Michael G. Pollack published in 2013"
Patent•
25 Apr 2013TL;DR: In this article, a method of manipulating a droplet comprising providing a substrate comprising a surface, an elongated transport electrode disposed on the substrate surface, and one or more wires for providing power to the transport electrode was presented.
Abstract: A method of manipulating a droplet comprising providing a substrate comprising a surface; an elongated transport electrode disposed on the substrate surface, the elongated transport electrode having a first and a second end and configured to impart a gradient force to the droplet; and one or more wires for providing power to the transport electrode; and providing power to the one or more wires to effect the gradient force and thereby transport the droplet along the length of the elongated transport electrode from the first end to the second end.
10 citations
Patent•
05 Feb 2013TL;DR: In this paper, the authors provided methods for manipulating droplets by placing the droplet on a surface comprising an array of electrodes and a substantially co-planer array of reference elements.
Abstract: Methods are provided for manipulating droplets. The methods include providing the droplet on a surface comprising an array of electrodes and a substantially co-planer array of reference elements, wherein the droplet is disposed on a first one of the electrodes, and the droplet at least partially overlaps a second one of the electrodes and an intervening one of the reference elements disposed between the first and second electrodes. The methods further include activating the first and second electrodes to spread at least a portion of the droplet across the second electrode and deactivating the first electrode to move the droplet from the first electrode to the second electrode.
8 citations
01 Jan 2013
TL;DR: This work reports on the first demonstration of bulk cell transformation of E. coli by an electroporation device integrated with an EWD microfluidics system, which achieved up to 9.8% transformation efficiency (evaluated as the ratio of transformed cells to survived cells) while maintaining fluid transport capability.
Abstract: ABSTRA CT Software automated genomic engineering (SAGE) enables arbitrary genetic modification of bacteria on a fluidic platform that implements the multiplex automated genomic engineering (MAGE) process [1]. Electrowetting-ondielectric (EWD) digital microfluidics is well suited for SAGE because of its inherent reconfigurability, small reagent volumes, and parallel processing capability [2]. We report on the first demonstration of bulk cell transformation of E. coli by an electroporation device integrated with an EWD microfluidics system, which achieved up to 9.8% transformation efficiency (evaluated as the ratio of transformed cells to survived cells) while maintaining fluid transport capability. Toward the goal of enabling efficient MAGE cycling with real time feedback control, monitoring of cell recovery and growth was implemented via reflectance spectroscopy with a limit of detection of about 10 cells/ml. Furthermore, simulated MAGE cycles showed that bacteria remained viable for at least 90 cycles (27 days) on-chip.
5 citations