HOME >> BIOLOGY >> NEWS
Electromagnetic miniatures

This press release is also available in German.

Magnetic components that can be controlled by the application of an external electric field are useful in many different applications. They can serve as microfluidic pumps, mixers, or valves in miniature lab-on-chip systems, or they can help in sorting and arranging magnetic particles. Biochemistry and cellular biology in particular benefit from many possible uses: for example, antibodies or other ligands that bind to individual biomolecules or to surface structures of cells can be coupled to magnetic beads in order to recognize and bind to their specific bonding partner even in complex mixtures. They can subsequently be fished out of the mixture with an electromagnet. Electromagnets have an additional advantage over permanent magnets: they can easily be switched on and off with an electric current. Also, the field strength can be adjusted to the desired value and can be changed as required. However, electromagnets do have the disadvantage of generating weaker magnetic fields, meaning that they must be very close to the place where they are to be used.

G. M. Whitesides and his co-workers at Harvard University in Cambridge, USA, have now developed an uncomplicated method for producing a microfluidic channel along with two metal cables parallel to it and only 10 m away. First, a structure consisting of a 40-m-wide and 40-m-deep inner channel between two 120-m-wide and 40-m-deep outer channels was lithographically engraved into a polydimethylsiloxane resin. Treatment with 3-mercaptopropyltrimethoxysilane silanized the surfaces of the outer channels. This allowed them to be coated with molten solder that was poured into the heated forms in the next step. Upon cooling, the liquid metal solidified, forming two stable metal cables to the left and right of the inner channel. Application of an electrical field to these two wires gene
'"/>

Contact: George M. Whitesides
gwhitesides@gmwgroup.harvard.edu
617-495-9430
John Wiley & Sons, Inc.
6-Oct-2006


Page: 1 2

Related biology news :

1. JCI table of contents: October 19, 2006
2. Other highlights in the October 18 JNCI
3. Story tips from the Department of Energys Oak Ridge National Laboratory, October 2006
4. ACS News Service Weekly PressPac -- October 11, 2006
5. Highlights from the October 2006 Journal of the American Dietetic Association
6. Highlights from October ESA journals
7. Story tips from the Department of Energys Oak Ridge National Laboratory, October 2005
8. Other highlights in the October 19 JNCI
9. JCI table of contents October 3, 2005
10. Highlights from the October Journal of the American Dietetic Asociation
11. JCI table of contents October 1, 2005

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:7/2/2020)... (PRWEB) , ... July 01, 2020 , ... ... presented its phase 1a findings of Neihulizumab, a biologic for the treatment of ... June 2020. Led by hemato-oncologist Dr. Paul J Martin of the Fred Hutchinson ...
(Date:7/1/2020)... ... July 01, 2020 , ... Catalent, a global leader ... Teva-Takeda Pharmaceuticals’ packaging facility in Minakuchi, located in the Shiga prefecture of Japan. ... in Kakegawa, the new 60,000-square-foot facility will provide customers with flexible clinical supply ...
(Date:6/28/2020)... ... June 25, 2020 , ... ... software solutions for biopharmaceutical R&D, today announced that it has entered into ... full-length multispecific antibodies (Multiclonics®), to support their translational and clinical research strategy ...
Breaking Biology News(10 mins):
(Date:7/10/2020)... Va. (PRWEB) , ... July 08, 2020 , ... ... testing services and products, announces a significant expansion of laboratory operations through its ... collection for agencies implementing testing programs. , Bode-CARES provides a ...
(Date:7/7/2020)... ... 2020 , ... Bio-IT World has announced the winners of ... University of Chicago, Massachusetts General Hospital, Mission: Cure, and the Pistoia Alliance were ... outstanding examples of how technology innovations and strategic initiatives can be powerful forces ...
(Date:6/28/2020)... ... 25, 2020 , ... With the COVID-19 pandemic impacting millions ... In an effort to better understand the cellular responses to COVID-19, the digital ... portraying therapeutic compound effects from over 1,600 approved and referenced molecules on SARS-CoV-2-infected ...
(Date:6/23/2020)... , ... June 22, 2020 , ... ... offering an Amniosomes special offer. This includes buy three, get the fourth unit ... (888) 568-6909. , Amniotic derived exosomes, known as exosomes, have been a game ...
Breaking Biology Technology:
Cached News: