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:3/29/2017)... March 29, 2017  Applied BioMath ( ... modeling to drug research and development, today ... Zymeworks Inc. for quantitative systems pharmacology (QSP) ... for the treatment of cancer. ... for GLP toxicology studies and first-in-human dose ...
(Date:3/29/2017)... ... March 29, 2017 , ... Bactana Animal Health, a company ... world’s food supply through enhancement of the gut microbiota, today announced the closing of ... Innovations , New York-based Sustainable Income Capital Management, LLC and a number of private ...
(Date:3/29/2017)... Research and Markets has announced the addition of the ... to their offering. ... The study scope includes key agricultural biotechnology ... biology tools and genome editing tools); synthetic biology-enabled chemicals and ... products are analyzed to determine present and future market sizes, ...
(Date:3/28/2017)... ... , ... Franz Inc ., the leading supplier of Semantic Graph Database ... ‘Champion’ by Bloor Research in its recent Graph Database Market Update report. ... to Gruff, it was rated as the easiest product to use.” – Bloor Research ...
Breaking Biology Technology:
(Date:3/1/2017)... 2017  Aware, Inc. (NASDAQ: AWRE), a leading supplier ... P. Moberg has resigned, effective March 3, 2017, ... Officer and Treasurer of Aware citing a desire to ... member of the Board of Directors of Aware. ... Officer and co-President, General Counsel has been named Chief ...
(Date:2/28/2017)... , Spanien, 27. Februar 2017  EyeLock LLC, ein ... wird seine erstklassige biometrische Lösung zur Iris-Erkennung ... mit X16 LTE auf dem Mobile World ... am Qualcomm-Stand in Halle 3, Stand 3E10, ... die Sicherheitsplattform Qualcomm Haven™ – eine Kombination ...
(Date:2/24/2017)... , Feb. 24, 2017  EyeLock LLC, a leader of ... elite iris biometric solution on the latest Qualcomm® ... at Mobile World Congress 2017 (February 27 ... in Hall 3, Stand 3E10. ... Haven™ security platform—a combination of hardware, software ...
Breaking Biology News(10 mins):