Navigation Links
Super-thin membranes clear the way for chip-sized pumps
Date:10/28/2013

The ability to shrink laboratory-scale processes to automated chip-sized systems would revolutionize biotechnology and medicine. For example, inexpensive and highly portable devices that process blood samples to detect biological agents such as anthrax are needed by the U.S. military and for homeland security efforts. One of the challenges of "lab-on-a-chip" technology is the need for miniaturized pumps to move solutions through micro-channels. Electroosmotic pumps (EOPs), devices in which fluids appear to magically move through porous media in the presence of an electric field, are ideal because they can be readily miniaturized. EOPs however, require bulky, external power sources, which defeats the concept of portability. But a super-thin silicon membrane developed at the University of Rochester could now make it possible to drastically shrink the power source, paving the way for diagnostic devices the size of a credit card.

"Up until now, electroosmotic pumps have had to operate at a very high voltageabout 10 kilovolts," said James McGrath, associate professor of biomedical engineering. "Our device works in the range of one-quarter of a volt, which means it can be integrated into devices and powered with small batteries."

McGrath's research paper is being published this week by the journal Proceedings of the National Academy of Sciences.

McGrath and his team use porous nanocrystalline silicon (pnc-Si) membranes that are microscopically thinit takes more than one thousand stacked on top of each other to equal the width of a human hair. And that's what allows for a low-voltage system.

A porous membrane needs to be placed between two electrodes in order to create what's known as electroosmotic flow, which occurs when an electric field interacts with ions on a charged surface, causing fluids to move through channels. The membranes previously used in EOPs have resulted in a significant voltage drop between the elect
'/>"/>

Contact: Peter Iglinski
peter.iglinski@rochester.edu
585-764-7002
University of Rochester
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Researchers capture images of open channel that moves proteins across cell membranes
2. Photosynthesis: Membranes in tight corners
3. Modifications of a nanoparticle can change chemical interactions with cell membranes
4. Patel recognized with NSF Career Award for computer-modeling research on cell membranes
5. Microfluidic platform gives a clear look at a crucial step in cancer metastasis
6. Chair Mats of Glass Company Clearly Innovative Announces the Launch of 20 New Dealers in the Midwest
7. Researchers reveal the clearest new pictures of immune cells
8. Less haze in Singapore as the cause becomes clearer and more complex
9. CNIO researchers identify a new gene that is essential for nuclear reprogramming
10. U-M researchers find new way to clear cholesterol from the blood
11. Invention could make spent nuclear fuel useful for irradiation purposes
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Super-thin membranes clear the way for chip-sized pumps
(Date:7/9/2014)... species may be able to cope with the rising salinity ... The Arctic today is best known for its tundra and ... 53 to 38 million years ago during what is known ... a huge temperate forest with brackish water, home to a ... crocodiles and giant tortoises. Much of what is known about ...
(Date:7/9/2014)... on the verge of an economy driven by methane, the ... and is undergoing a production boom. It has poised the ... is casting serious doubts over just how climate-friendly it is, ... (C&EN), the weekly news magazine of the American Chemical ... at C&EN, explains that when burned as a fuel to ...
(Date:7/9/2014)... N-methyl-D-aspartate receptor antagonists can alleviate the symptoms ... irreversible cognitive dysfunction and effectively scavenge amyloid ... peptide (Aβ) vaccines reduced and eliminated Aβ ... mouse model, and significantly improved behavioral and ... team, First Affiliated Hospital of China Medical ...
Breaking Biology News(10 mins):Shark teeth analysis provides detailed new look at Arctic climate change 2Shark teeth analysis provides detailed new look at Arctic climate change 3
... break down plant biomass into the precursors of biodiesel or ... alternatives to petroleum. But the potential of this "biorefinery" technology ... down lignin, a highly stable polymer that makes up as ... bacteria are among few microorganisms known to degrade and ...
... early step toward new treatments for people with osteoporosis, scientists ... can help male mice produce healthier bones. Interestingly, the ... in the Journal of Cellular Physiology . "We ... though it,s unclear exactly why," said lead author Laura McCabe, ...
... release is available in Arabic , French, ... . Pharmaceutical drugs that end up in the ... plants may lead to unexpected ecological impacts, according to a new ... University in Sweden discovered that the fish ate faster, became bolder ...
Cached Biology News:A microbial biorefinery provides new insight into how bacteria regulate genes 2A microbial biorefinery provides new insight into how bacteria regulate genes 3Building healthy bones takes guts 2Mood-modifying drugs for humans also alter fish behavior 2Mood-modifying drugs for humans also alter fish behavior 3
(Date:1/15/2014)... 15, 2014  Bill Jacobs Automotive, a group of car dealerships ... with the Heartland Blood Center and offering free oil change ... takes place Saturday, Jan. 18 at the Bill Jacobs Cadillac ... (Photo: http://photos.prnewswire.com/prnh/20140115/MN46637 )  The Bill ...
(Date:1/15/2014)... SAN JOSE, California , January 15, 2014 ... conjugates for cancer, today announced the appointment of Thomas C ... has over 20 years, development experience gained in the biotechnology ... "I am delighted to welcome Tom at this ...
(Date:1/15/2014)... January 15, 2014 Two champions of ... their sponsorship of an annual competition for middle and ... access to, innovative STEM study. The competition presents students ... Tests of Engineering Aptitude, Mathematics, and Sciences is ...
(Date:1/15/2014)... 15, 2014 AudioNotch is the internet's ... for the treatment of tinnitus. Patients listen to sound ... over a period of weeks to months, their tinnitus volume ... two forms: Notched Music and Notched White Noise. Now, AudioNotch ...
Breaking Biology Technology:Join the Bill Jacobs Auto blood drive and receive a free oil change 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 2Oxford BioTherapeutics Appoints Thomas C Reynolds MD, PhD to its Board of Directors 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 2Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 3Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 4Technology Student Association Partners with Leaders in STEM Education Advocacy for Annual Competition 5
... (Nasdaq: ITMN ) today announced the issuance of ... covers the ITMN-191 (R7227) compound. The nominal 20-year patent ... inhibitor of the hepatitis C virus (HCV) NS3/4A protease. ... said, "We are pleased to announce that this new patent, ...
... Human Genome Sciences, Inc. (Nasdaq: HGSI ... call to discuss its financial results for the year ... to be disclosed on Thursday, February 26, 2009, after ... conference call will be hosted by senior management and ...
... Advanced cholesterol test helps usher in new era of ... For the Pittsburgh Steelers, ... given them the boost to win Super Bowl XLIII. ... oils dramatically improve cholesterol levels in professional football players. ...
Cached Biology Technology:InterMune Announces Issuance of U.S. Patent for ITMN-191 2InterMune Announces Issuance of U.S. Patent for ITMN-191 3Human Genome Sciences to Sponsor Conference Call to Discuss Full Year 2008 Financial Results 2VAP Test Demonstrates Value of Fish Oil in Reducing Heart Risk for Super Bowl Champs 2VAP Test Demonstrates Value of Fish Oil in Reducing Heart Risk for Super Bowl Champs 3
... gasket slides/kit Gasket slide kit (1x 22K ... or Gasket slide kit ... disposable gasket slides offered in either 11K or 22K ... The gaskets are carefully fabricated and batch tested ...
... This CLS number is ... to easily match Cornings product ... yet, please order under the ... contact customer service for assistance. ...
... description: self locking design in ice/water ... new product number, created to easily ... no availability yet, please order under ... contact customer service for assistance. ID ...
... Oligo Microarray Kit (V2), 2 x ... characterize expression of many thousands of ... during important biological processes. Each microarray ... known ORFs from the S288C strain ...
Biology Products: