Navigation Links
Liquid metal key to simpler creation of electrodes for microfluidic devices
Date:2/22/2011

Researchers from North Carolina State University have developed a faster, easier way to create microelectrodes, for use in microfluidic devices, by using liquid metal. Microfluidic devices manipulate small amounts of fluid and have a wide variety of applications, from testing minute blood samples to performing advanced chemical research.

"By making it easier to incorporate electrodes into microfluidic devices, we hope to facilitate research and development into new technologies that utilize those devices, such as biomedical tools," says Dr. Michael Dickey, an assistant professor of chemical and biomolecular engineering at NC State and co-author of a paper describing the research.

Traditionally, microfluidic devices have incorporated solid metal electrodes that serve as sensors, pumps, antennas or other functions. However, these solid electrodes can be problematic, because they need to be physically aligned to a channel that runs through the device. The channel serves as the entry point for whatever fluid the device is designed to manipulate. Aligning the electrodes is tricky because the electrodes are only tens to hundreds of microns in diameter, as is the channel itself. It is difficult to manipulate objects of that size a micron is one-millionth of a meter, and a human hair is approximately 100 microns in diameter.

The NC State team has addressed the problem by designing microfluidic devices that incorporate three channels, with the central channel separated from the other two by a series of closely set posts. The researchers inject the two outer channels with a liquid metal alloy composed of gallium and indium. The alloy fills the outer channels completely, but forms an oxidized "skin" that spans the space between the posts leaving the central channel free to receive other fluids.

"This approach allows you to create perfectly aligned electrodes in a single step," Dickey says. "The channels are built into the device, so the electrodes are inherently aligned we get the metal to go exactly where we want it. This means creating these devices is easier and faster."

In addition, this approach allows for the creation of electrodes in useful configurations that were previously difficult or impossible to achieve. This can be done by changing the shape of the channels that will be injected with the liquid metal. These configurations would create more uniform electric fields, for use in manipulating fluids and particles.


'/>"/>

Contact: Matt Shipman
matt_shipman@ncsu.edu
919-515-6386
North Carolina State University
Source:Eurekalert

Related biology technology :

1. Liquid method: pure graphene production
2. AutoImmune Inc. Announces Shareholder Approval of Plan of Complete Liquidation and Dissolution
3. Water Filtration and Liquid Separation Training by the American Filtration and Separations Society.
4. Mescal worm test shows DNA leaks into preservative liquids
5. Genaera Liquidating Trust To Sell Remaining Proprietary Assets
6. New Constant Diameter NeedleProbes™ with Unique Ability to Measure Liquid Surface Properties by AFM
7. 0.2 second test for explosive liquids
8. Los Gatos Research Introduces Second Generation Liquid-Water Isotope Analyzer
9. Pharmacy Compounds Liquid Mupirocin for the Chronic Sinusitis Patient
10. 4th BTLtec Conference on 24-25 Sep in Graz, Austria features Biomass to Liquids Innovators Sharing Updates on Pyrolysis and Gasification Technologies, Syngas Application, BTL Value Chain and a Site Visit to the Biomass CHP Gussing Plant.
11. TransTech Services Partners, Inc. Shareholders Approve Plan of Liquidation; Company To Distribute Amounts in Trust
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/25/2016)... ... May 25, 2016 , ... The Ankle Plating ... options designed to address fractures of the distal tibia and fibula. This system ... Ankle Plating System 3 is composed of seven plate families that span the ...
(Date:5/25/2016)... ... May 25, 2016 , ... Scientists at the University of Athens say ... mesothelioma may be hampering the research that could lead to one good one. Surviving ... read it now. , The team evaluated 98 mesothelioma patients who ...
(Date:5/25/2016)... Connecticut (PRWEB) , ... May 25, 2016 , ... ... the U.S. Food and Drug Administration (FDA) has granted the company’s orphan drug ... the company’s second orphan drug designation granted by the FDA. , Spinocerebellar ...
(Date:5/24/2016)... ... ... Last week, Callan Capital, an integrated wealth management firm specializing in asset ... Diego Life Science event at the Estancia La Jolla Resort and Spa. , Over ... Dr. Rich Heyman, former CEO of Aragon and Seragon, and Faheem Hasnain, former CEO ...
Breaking Biology Technology:
(Date:3/14/2016)... , Allemagne, March 14, 2016 ... ) - --> - Renvoi : image ... --> --> ... biométriques, fournit de nouveaux lecteurs d,empreintes digitales pour ... de DERMALOG sera utilisé pour produire des cartes ...
(Date:3/10/2016)...   Unisys Corporation (NYSE: UIS ) today ... is testing its biometric identity solution at the Otay Mesa ... help identify certain non-U.S. citizens leaving the country. ... help determine the efficiency and accuracy of using biometric technologies ... run until May 2016. --> the United ...
(Date:3/8/2016)...   Valencell , the leading innovator in ... secured $11M in Series D financing. The investment ... fund being launched by UAE-based financial services company ... TDF Ventures and WSJ Joshua Fund. Valencell plans ... growth and accelerate its pioneering innovation in accurate ...
Breaking Biology News(10 mins):