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:7/21/2014)... areas across Riau province on Sunday, July 20, indicating ... decline in rainfall. The number of detected hotspots ... been reported one day prior, which had reached only ... regencies and municipalities, most of which were in northern ... creates could potentially spread via winds to Malaysia and ...
(Date:7/21/2014)... process that uses extracts from seeds of Moringa oleifa ... by 90% to 99%. The hardy trees that are ... Africa, Asia, and Latin America. , The protocol, which ... review, is low-cost and efficient, making it especially ... countries who are presently drinking highly turbid and contaminated ...
(Date:7/21/2014)... reveals that mesenchymal (mezz-EN-chem-uhl) stem cells (MSCs) help rejuvenate ... MSCs into mouse leg muscles prior to several bouts ... during resistance training in humans that result in mild ... of repair and enhance the growth and strength of ... findings, described in the journal Medicine and Science ...
Breaking Biology News(10 mins):Stem cells aid muscle repair and strengthening after resistance exercise 2
... activated when we choose to suppress an emotion, compared to ... new study from the UCL Institute of Cognitive Neuroscience and ... Brain Structure and Function , the researchers scanned the brains ... activated when choosing for oneself to suppress an emotion. They ...
... among a national group of 87 newly elected fellows ... Tweten, OU Health Sciences Center in Oklahoma City, and ... highly-selective, peer-review process, based on their records of scientific ... Tweten, George Lynn Cross Research Professor in the Department ...
... that R. Graham Cooks, the Henry Bohn Hass Distinguished ... of the 2013 Dreyfus Prize in the Chemical Sciences, ... awarded biennially, consists of $250,000, a citation, and a ... University in the fall and will feature a lecture ...
Cached Biology News:Study finds brain system for emotional self-control 2OU microbiologists elected as fellows in the American Academy of Microbiology 2R. Graham Cooks wins Dreyfus Prize in the Chemical Sciences 2
(Date:7/22/2014)... 22, 2014  United Therapeutics Corporation (NASDAQ: ... release its second quarter 2014 financial results before ... United Therapeutics will host a half-hour teleconference ... Eastern Time.  The teleconference is accessible by dialing ... of the teleconference will be available for one ...
(Date:7/22/2014)... (PRWEB) July 22, 2014 Biofeedback ... hyperactivity disorder (ADHD) is diagnosed, selecting medication to best ... error. Analyzing brain patterns by using electroencephalography (EEG) can ... and thus lower the risk of adverse drug events. ... and Biomarkers” in the current issue of the ...
(Date:7/21/2014)... Lawrence Livermore National Laboratory ... Las Positas College (LPC) recently established a 24-month ... training for veterans, officials recently announced. , The ... is designed to help veterans develop the ... and establishes a pipeline of qualified candidates for ...
(Date:7/21/2014)... of Arts and Sciences has received a major ... , Mathew M. Maye, associate professor of chemistry, ... the National Science Foundation (NSF). The award supports ... the results of which may impact gas storage, ... , Maye,s approach is novel, in that he ...
Breaking Biology Technology:Analyzing Brain Patterns with EEG Can Help Predict Effective Use of Medication 2Analyzing Brain Patterns with EEG Can Help Predict Effective Use of Medication 3Engineering Program Established for Veterans 2Engineering Program Established for Veterans 3Syracuse University chemist to use NSF grant to study materials chemistry, nanoscience 2
... Feb. 19 NeurogesX, Inc.,(Nasdaq: NGSX ), ... therapies, announced today that it is scheduled to ... Growth Stock Conference in,Laguna Niguel, CA on February ... will be presenting and Stephen Ghiglieri, Chief,Financial Officer, ...
... BEIJING, Feb. 19 /Xinhua-PRNewswire/ -- Sinovac Biotech Ltd. (Amex:,SVA), ... it,will hold its 2007 Annual Meeting of Shareholders on ... meeting will be held concurrently at,No. 39 Shangdi Xi ... Temple,Street, St. John,s, Antigua. All shareholders of record as ...
... Pharmion Corporation,(Nasdaq: PHRM ) today reported financial ... For the year, net sales totaled $267.3 million,compared to ... of,Vidaza(R) (azacitidine for injection) totaled $165.3 million for 2007,compared ... of Vidaza totaled,$131.4 million in 2007, compared to $130.6 ...
Cached Biology Technology:NeurogesX to Present at Roth 2008 OC Growth Stock Conference 2NeurogesX to Present at Roth 2008 OC Growth Stock Conference 3Sinovac Biotech Ltd. Schedules 2007 Annual Meeting of Shareholders 2Pharmion Corporation Announces 2007 Operating Results 2Pharmion Corporation Announces 2007 Operating Results 3Pharmion Corporation Announces 2007 Operating Results 4Pharmion Corporation Announces 2007 Operating Results 5Pharmion Corporation Announces 2007 Operating Results 6
Form: Ready to use Applications: ELISA...
Form: Ready to use Applications: ELISA...
ANTI S. GROUP AG:H...
Recorder REC-111 single-channel, 1. Category: Chromatography Systems & Accessories, Systems....
Biology Products: