HOME >> BIOLOGY >> NEWS
When opposites don't attract: Understanding why may support new biomaterials, Science paper suggests

Every high school student is taught that opposite charges attract. Even in the complex world inside living cells, simple rules of thumb like this one usually continue to told, and go a long way to explaining how the machinery of life all holds together.

Recently, however, researchers have found an intriguing exception to this rule, which may have implications for the development of new materials for sophisticated sensors and optical devices, says Nily R. Dan, an assistant professor in UD's Department of Chemical Engineering, in a July 16 Science article.

"Our work addresses fundamental questions about how charges interact," Dan says of her joint work with researchers at the University of Pennsylvania. "In complex systems, such as multi-component materials or living cells, opposite charges don't necessarily attract. Understanding the conditions in which oppositely charged objects do or don't attract helps us understand basic strategies of self-assembly, which may be used to design new drug carriers or smart materials that respond to their environment."

Dan's article--coauthored by UD postdoctoral researcher Helim Aranda-Espinoza and by Yi Chen, Tom C. Lubensky, Philip Nelson, Laurence Ramos, and David A. Weitz of the University of Pennsylvania--examines the interactions between microscopic charged particles and oppositely charged synthetic membranes.

One would expect that the particles would adhere and cover the entire membrane surface. However, the experiments show that, frequently, only a small fraction of the membrane area is covered by adhering particles. Why do the remaining bare, oppositely charged surfaces repel particle adhesion? The researchers showed that in some cases the system prefers instead to separate into a highly adhesive zone and another, repulsive, zone by transmitting electrochemical jumps over long distances along the impenetrable membrane. While the system imitates living cells (the membrane) interacting with oppositely
'"/>

Contact: Ginger Pinholster
gingpin@udel.edu
302-831-6408
University of Delaware
16-Jul-1999


Page: 1 2

Related biology news :

1. Briefing to address what women dont know about lung cancer
2. With flu season coming, dont forgetexercise?
3. Clinical trial patients dont care about study sponsors or physician conflicts of interest
4. Researchers try to determine why cancer cells dont commit suicide
5. Birds do it. Bugs do it. But why dont we?
6. Memory for music: Musicians dont have to hear themselves perform after they learn a song
7. Ears cant hear when special sensory cells dont stay quiet
8. Bacteria cant do their thing if they dont have cling
9. Cell phones dont cause cancer, rat study finds
10. Lean mice adjust to appetite suppressant quickly, fat mice dont
11. Carbon monoxide has unexpected benefits, but dont try it at home

Post Your Comments:
(Date:3/23/2015)... NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or the ... commerce market, announces its biometric payment technology, the Wocket® smart ... starting March 30 th . The ... New York markets. Gino ... our new ad campaign following the recent initial shipment of ...
(Date:3/20/2015)... 20, 2015 NXT-ID, Inc. (NASDAQ: NXTD ... focused on the growing mobile commerce market, announces its ... of the products featured in 2015 "I Want That" ... PM EST on the DIY Network.   ... Vegas , site of the 2015 International CES ...
(Date:3/18/2015)... Florida , March 18, 2015 ... as businesses, new revolutionary smart wallets and apps continue to ... Companies currently entrenched in the mobile payment industry in focus ... Group Holding Ltd. (NYSE: BABA ), Apple Inc. ... GOOG ) and Facebook Inc. (NASDAQ: FB ) ...
Breaking Biology News(10 mins):NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 2NXT-ID's Wocket Smart Wallet to Launch New CNBC Regional TV Ad Campaign 3NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 2NXT-ID's Wocket Biometric Smart Wallet to Air on "I Want That" International CES Special 3Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 2Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 3Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 4Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 5Revolutionary Smart Wallet & Mobile Payment Choices Change the Game for Consumers - Company Begins Shipping Newest Digital Wallet to Customers 6
(Date:4/23/2015)... DIEGO , April 23, 2015  Neurocrine Biosciences, ... Company will report its first quarter 2015 results before ... Neurocrine will then host a live conference call and webcast ... update Thursday morning, April 30, 2015 at 8:00 a.m. ... can access the live conference call by dialing 866-952-1906 ...
(Date:4/23/2015)... Calif. , April 23, 2015  Veracyte, Inc. (NASDAQ: ... into a definitive agreement to sell approximately $40 million ... the agreement, the investors will purchase an aggregate of ... of $8.15 per share, the closing stock price on ... new and existing investors, including Broadfin Capital, Camber Capital, ...
(Date:4/23/2015)... 23, 2015  Metanome, Inc., an industry leader ... has changed its name to Diversigen, Inc.  The ... the single commercial source for the myriad of ... the diverse opportunities of the microbiome.  From the ... – including those that are difficult to handle, ...
(Date:4/23/2015)... CA (PRWEB) April 23, 2015 Delpor, ... today announced that the United States Patent and Trademark ... Company’s NANOPOR™ technology. US Pat. No. ... Delpor’s microfabricated drug delivery device for the ... proprietary NANOPOR™ technology for the sustained (zero-order) release of ...
Breaking Biology Technology:Neurocrine Biosciences Announces Conference Call and Webcast to Report First Quarter 2015 Results 2Veracyte, Inc. Announces $40 Million Private Placement 2Veracyte, Inc. Announces $40 Million Private Placement 3Veracyte, Inc. Announces $40 Million Private Placement 4Metanome Announces Corporate Name Change to Diversigen 2Delpor, Inc. Announces the Issuance of 2 New US Patents Based on its Nanopore Technology which Enables the Sustained Release of Drugs from a Small Implant Device 2Delpor, Inc. Announces the Issuance of 2 New US Patents Based on its Nanopore Technology which Enables the Sustained Release of Drugs from a Small Implant Device 3
Cached News: