Navigation Links
Sticky surfaces turn slippery with the flip of a molecular light switch

Changing a surface from sticky to slippery could now be as easy as flipping a molecular light switch. Researchers at Rensselaer Polytechnic Institute have created an "optically switchable" material that alters its surface characteristics when exposed to ultraviolet (UV) light. The new material, which is described in the June 19 issue of the journal Angewandte Chemie International Edition, could have a wide variety of applications, from a protein filter for biological mixtures to a tiny valve on a "lab-on-a-chip."

Synthetic polymer membranes are used in a variety of applications based on the science of "bioseparation" -- filtering specific proteins from complex liquid mixtures of biological molecules. But proteins often stick to these membranes, clogging up their pores and severely limiting their performance, according to Georges Belfort, the Russell Sage Professor of Chemical Engineering at Rensselaer and corresponding author of the paper.

"We asked ourselves, can one use light to help the proteins hop on and hop off? We have shown that when one changes light, the proteins don't stick as well," Belfort says.

Operators need an inexpensive way to clean these membranes while they are still in place, rather than periodically removing them from the application environment, Belfort says. But currently the only cleaning options involve expensive chemicals or labor-intensive procedures that result in significant process down-time.

To make the new materials, Belfort and his coworkers attached spiropyran molecules to a widely used industrial polymer, poly(ether sulfone). Spiropyrans are a group of light-switchable organic molecules that exist in a colorless, "closed" form under visible light, but switch to a reddish-purple, "open" form when exposed to UV light. This change leads to an alteration of the new material's polarity, or the chemical structure of its atoms.

In switching from non-polar to polar, the material becomes less attracti
'"/>

Source:Rensselaer Polytechnic Institute


Page: 1 2

Related biology news :

1. Sticky mice lead to discovery of new cause of neurodegenerative disease
2. Shampoo detergent added to paint makes surfaces self-sterilizing
3. Bacteria can survive for weeks on hospital surfaces
4. Researchers to develop active nanoscale surfaces for biological separations
5. Interfering RNA silences genes in slippery immune cells
6. Scientists ID molecular switch in liver that triggers harmful effects of saturated and trans fats
7. Source of molecular triggers in cutaneous T cell lymphoma identified
8. Plants, animals share molecular growth mechanisms
9. NYU researchers simulate molecular biological clock
10. Scientists reveal molecular secrets of the malaria parasite
11. Scientists identify molecular events that drive cell senescence
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Sticky surfaces turn slippery with the flip molecular light switch

(Date:12/17/2014)... Dec. 16, 2014 Valencell, a leader in performance ... technology to industry leaders such as Intel, Jabra, Atlas, ... biometric wearable products. These products will be showcased at ... Las Vegas . "Our partners ...
(Date:12/11/2014)... and Markets , http://photos.prnewswire.com/prnh/20130307/600769 ... the addition of the "Biometrics Market in the ... One major trend emerging in this market is ... is important to upgrade biometric solutions to the latest ...
(Date:12/10/2014)... , Dec. 8, 2014 You,ve been here before: you desperately ... your password, site key or the answer to your secret question. ... Today, Hoyos Labs , a digital infrastructure security ... end to the frustration that comes with usernames, passwords and PINs ...
Breaking Biology News(10 mins):Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2Biometrics Market in the APAC Region 2015-2019: Key Vendors are 3M Cogent, NEC, Safran and Suprema 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 2The Password is Finally Dead: Launch of 1U Mobile App Eliminates Need for All Usernames and Passwords 3
... by the National Breast Cancer Foundation and Viralytics Ltd, ... affects cancer cells ?this would be an improvement on ... normal body cells. , "In theory, the virus is ... of cancer cells, including breast cancers, whilst leaving normal ...
... pain has risen dramatically among full-time U.S. workers in ... go to their jobs rather than call in sick, ... impact on work despite being physically present at the ... national survey conducted by Harris Interactive® on "Pain in ...
... a conversation and writing a letter whilst thinking about ... about them. This is possible due to the cerebellum. ... a result the cerebrum can perform other tasks. However, ... Dutch researcher Angelique Pijpers reconstructed a part of cerebellar ...
Cached Biology News:Common cold virus may kill breast cancer cells 2Chronic pain up almost 40 percent among US workers in past decade 2On automatic pilot 2
(Date:1/22/2015)... Switzerland (PRWEB) January 22, 2015 Selexis ... characterized mammalian Research Cell Banks (RCBs) used for drug ... Research Cell Banks will include Next-Generation Sequencing ... genetic architecture de-risks biologic manufacturing by ensuring the integrity ...
(Date:1/22/2015)... , Jan. 22, 2015   GenoSpace , a precision medicine ... to enable the broad use of genomic, imaging and other ... appointment of Michelle Munson , CEO of Aspera, an ... Logo - http://photos.prnewswire.com/prnh/20150122/170713 "We ...
(Date:12/24/2014)... , Dec. 24, 2014  Vermillion, Inc. (Nasdaq:   ... disease, announced today that the Company closed its ... Investment Management, Jack W. Schuler , Birchview ... were $10.5 million, before offering expenses.  The proceeds ...
(Date:12/24/2014)... SoundConnect’s 2015 next generation ... communication technology, provide continued education and inform users ... demonstrates online communication features and benefits; empowering users ... innovative and powerful tools. , According to SoundConnect’s ...
Breaking Biology Technology:Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2GenoSpace Expands Board with Appointment of Michelle Munson 2Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3SoundConnect Launches Leading Edge Business Communications Webinar Series 2SoundConnect Launches Leading Edge Business Communications Webinar Series 3
... Oct. 3 /PRNewswire-FirstCall/ - Dragon Pharmaceutical Inc.,(TSX: DDD; ... in both,prices and sales volumes for its main ... been operating near its maximum capacity,to meet rising ... ended August 31, 2007, the Company has,achieved significant ...
... Ph.D., Joins Solazyme Executive Team, SOUTH SAN ... pioneering biofuels and health/wellness products from,microalgae, has named ... senior,vice president of business development. Campione will ... and contracts with major companies. These deals will,help ...
... Calif., Oct. 3 Alexza,Pharmaceuticals, Inc. (Nasdaq: ... be webcast live during the 4th Annual BIO ... p.m. Eastern Time. The presentation,will be webcast from ... accessed,under the Investor Relations tab at http://www.alexza.com ...
Cached Biology Technology:Strong Demand Pushes up Both Prices and Sales Volumes for Dragon's Main Products 2Strong Demand Pushes up Both Prices and Sales Volumes for Dragon's Main Products 3Solazyme Announces New Senior Vice President of Business Development 2The 4th Annual BIO Investor Forum to Webcast Alexza's Corporate Presentation 2