Navigation Links
Ship-in-a-bottle kit on a microchip
Date:12/2/2008

for Metals Research, and David Marr, a professor at the Colorado School of Mines, have now found a new way to equip these miniaturized laboratories with moving parts and how to drive the tiny machines. They introduce colloidal particles, tiny plastic spheres with a diameter of just about five micrometers, into the channels and cavities on the chip.

As the particles contain iron oxide, they group together when they are magnetized by an external magnetic field. The scientists construct the magnetic field with four coils so that the microparticles are literally remote controlled and form diamond shapes or cog wheels. "The shape they assemble into depends crucially on the geometry of the channels," explains Tobias Sawetzki, who a doctoral student is working on the project. The microparticles then remain in this shape as long as the magnetic field is switched on.

The geometry also determines the function of the aggregates. By tipping backwards and forwards, a rhombus creates openings and acts like a valve. On the other hand, if it rotates in a chamber with two inflows, it mixes the incoming liquids. The micro stirrer is also driven by a magnetic field that rotates clockwise or anticlockwise parallel to the chip. In the same way, the researchers in Stuttgart roll a cog wheel through a channel with a serrated wall. The cog wheel, which completely shuts the channel off, agitates liquid back and forth and only in combination with two valves, acts like a pump.

"Compared to other approaches to equipping microlaboratories with moving parts, our ship-in-a-bottle technique has several advantages," says David Marr. Some scientists use pneumatic systems to pump liquids through microchannels, for example. However, this requires each component to be connected with a separate hose to the outside so that it can be supplied with compressed air. This is very complex and limits the integration density on microfluidic devices considerably, i.e. the total number o
'/>"/>

Contact: Clemens Bechinger
c.bechinger@physik.uni-stuttgart.de
49-711-685-65218
Max-Planck-Gesellschaft
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Princeton engineers develop low-cost recipe for patterning microchips
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ship-in-a-bottle kit on a microchip
(Date:12/17/2014)... Valencell, a leader in performance biometric data sensor ... leaders such as Intel, Jabra, Atlas, and Scosche to ... These products will be showcased at CES 2015, taking ... . "Our partners choose PerformTek biometrics, ...
(Date:12/11/2014)... Markets , http://photos.prnewswire.com/prnh/20130307/600769 ... addition of the "Biometrics Market in India 2015-2019" ... major trend emerging in this market is the adoption ... than one characteristic of an individual for verification and ...
(Date:12/10/2014)... Dec. 9, 2014  Wake Forest Baptist Medical Center today announced ... of Medicine. Funding for this $50 million capital project is ... launched next summer. The medical education building ... Tobacco Company complex, adjacent to 525@vine in Wake Forest Innovation ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in India 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 2Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 3Wake Forest Baptist to Build New Medical Education Facility In Wake Forest Innovation Quarter 4
... reviews of nutrition related topics raises unique challenges ... In a new article, a team of researchers ... and limitations of systematic reviews relevant to nutrition ... Systematic reviews, also referred to as ...
... 2008 - The International Atomic Energy Agency (IAEA) today ... that could bolster efforts aimed at pulling millions of ... use radiation to produce improved high-yielding plants that adapt ... or that are resistant to certain diseases and insect ...
... benefit from a powerful new database, available for free ... the parts of proteins most necessary for their function. ... of genetics at the Stanford University School of Medicine, ... as the guide to determining the role different proteins ...
Cached Biology News:Experts discuss applying systematic review to the field of nutrition 2Nuclear science for food security 2Powerful online tool for protein analysis provided pro bono by Stanford geneticist 2Powerful online tool for protein analysis provided pro bono by Stanford geneticist 3
(Date:1/23/2015)... 23, 2015 Biofertilizers stimulate microbial activities ... nitrogen and phosphorous through the activities in the soil ... increasing due to the stress on reducing environmental pollution ... The report defines and segments the bio fertilizers market ...
(Date:1/22/2015)... | RBJ today announces the firm brokered a long-term lease ... leading biopharmaceutical company, at Two Ledgemont Center in ... , president, and Brian Cohen , senior vice president, ... at 95 Hayden Ave. Photo - http://photos.prnewswire.com/prnh/20150122/170765 ...
(Date:1/22/2015)... 22, 2015 Protocol Networks brings independent ... team of brand-neutral, independent consultants, Protocol Networks has recently ... that over the years, his company has attracted several ... of Plainfield, as well as others. With the success ...
(Date:1/22/2015)... 22, 2015 Controlled Substance Compliance Services ... helps companies check the legal requirements around using controlled ... China. , As their international operations expand and ... software solutions built as a result of the first ...
Breaking Biology Technology:Biofertilizers Market Expected to Reach $1,649.7 Million by 2019 - New Report By MarketsandMarkets 2Biofertilizers Market Expected to Reach $1,649.7 Million by 2019 - New Report By MarketsandMarkets 3Biofertilizers Market Expected to Reach $1,649.7 Million by 2019 - New Report By MarketsandMarkets 4Transwestern | RBJ Advises Shire in 202,000 SF Lease, Creating Boston's Largest Suburban Biotech Campus 2Protocol Networks Brings Independent Technology Consulting to the Constitution State 2Global Compliance Service for Controlled Substances to Expand to China 2
... Calif., Oct. 10 Neurobiological,Technologies, Inc. (NTI(R)) (Nasdaq: ... on Monday, October 13, to provide an update on ... stroke.,Hosting the call will be Paul E. Freiman, president ... officer., -- Date: Monday, October 13, ...
... effects of, recombinant lactoferrin (tradename: Lacromin) in mammalian ... leading to a significant boost ... A recently published study,in the scientific journal In Vitro ... see, http://www.Lacromin.com ) is a strong growth factor for ...
... CORPUS CHRISTI, Texas, Oct. 10 CSMG,Technologies, ... management,company, announced the company has received approval ... on a key divisional application for "Bonding ... Electric Current,Therethrough" for CSMG Technologies subsidiary Live ...
Cached Biology Technology:Neurobiological Technologies Announces Update Call on Viprinex (TM) Phase 3 Trial Program 2New Study Finds Growth Factor Boosts Productivity in Mammalian Cell Culture 2CSMG Technologies Announces Key Fifth U.S. Tissue Bonding/Welding Patent Approved 2CSMG Technologies Announces Key Fifth U.S. Tissue Bonding/Welding Patent Approved 3
... For use with T4 Polynucleotide ... (5' phosphate ends) of nucleic acids. ... Kinase transfers the 5' phosphate group ... transfers the Gamma-phosphate of ATP to ...
ImageQuant 400, 1 EA. Category: ImageQuant CCD Imagers....
...
...
Biology Products: