Navigation Links
Tethered molecules act as light-driven reversible nanoswitches
Date:6/23/2008

Our ability to see is based on molecules in the eye that flip from one conformation to another when exposed to visible light. Now, a new technique for attaching light-sensitive organic molecules to metal surfaces allows the molecules to be switched between two different configurations in response to exposure to different wavelengths of light. Because the configuration changes are reversible and can be controlled without direct contact, this technique could enable applications that can be controlled at the molecular scale.

The technology has been suggested as a possible basis for molecular motors, artificial muscles, and molecular electronics. The research results, obtained by a team led by Paul S. Weiss, distinguished professor of chemistry and physics at Penn State University and James M. Tour, Chao professor of chemistry at Rice University, are reported in the June 2008 issue of the journal Nano Letters.

Until now, progress was impeded because, when such molecules were attached to surfaces, they no longer could be switched back and forth, as they could be when they were in solution. The new technique uses a change in the shape of an azobenzene molecule in response to light to provide two different states. The azobenzene molecule consists of a bridge of two nitrogen atoms attached to one another by a double bond, with each nitrogen atom also bound to a benzene ring. The two benzene rings can be on the same side of the molecule (cis configuration) or on opposite sides (trans configuration). When the molecule absorbs energy, in the form of light, it can change between cis and trans configurations in a process called photoisomerization. "This mechanism is essentially the same that we use in our eyes for vision," said Weiss. "The molecule responds to light by making a change that can be harnessed. In the eye, the change causes a neural impulse."

The photoisomerization of azobenzene is understood well in solution, b
'/>"/>

Contact: Barbara K. Kennedy
science@psu.edu
891-486-34682
Penn State
Source:Eurekalert  

Page: 1 2

Related biology technology :

1. Tethered to chip, energy supply that drives sperm could power nanobot
2. Computer predicts anti-cancer molecules
3. Breakthrough in nanotechnology by uncovering conductive property of carbon-based molecules
4. Method to deliver molecules within embryonic stem cells improves differentiation
5. Diffusion Pharmaceuticals Announces Issuance of U.S. Patent No. 7351844, Titled Bipolar Trans Carotenoid Salts and Their Uses, for Its Family of First-In-Class Molecules
6. Directed self-ordering of organic molecules for electronic devices
7. Velcura Therapeutics, Inc. Teams with International Discovery Sourcing Consultants to Develop New Therapeutic Molecules for Cancer and Bone Disease
8. Foamix Signs Term Sheet to Acquire License to Organo-Boron Antifungal Molecules - Will Target the $11 Billion Dollars Fungal Infection Market
9. When proteins, antibodies and other biological molecules kiss, a new kind of biosensor can tell
10. When proteins, antibodies and other biological molecules kiss, a new kind of biosensor can tell
11. Molecules line up to make the tiniest of wires
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Tethered molecules act as light-driven reversible nanoswitches
(Date:12/17/2014)... (PRWEB) December 17, 2014 Gene ... that it has entered into a technology access ... (ADM) to apply DNA2.0’s proprietary protein engineering technology, ... process. , “We are extremely excited that the ... platform. This proprietary bioengineering technology has now ...
(Date:12/17/2014)... SOUTH SAN FRANCISCO, Calif. , Dec. 17, ... positive results of a Phase 2 study evaluating ... for the treatment of patients with severe, chronic ... the current standard of care, including topical steroids ... endpoint was percent change in Visual Analog Scale ...
(Date:12/15/2014)...  GlassesOff Inc. (OTCBB: GLSO) announced today the appointment ... director of the Company,s Board of Directors. ... its CEO until its acquisition by Stanley Black ... Recognized as the inventor of the first Wi-Fi-based Active ... -based RFID solutions focused on improving operational efficiency, safety ...
(Date:12/13/2014)... (PRWEB) December 12, 2014 Clarassance, a ... announced its new name: Therabron Therapeutics , Inc. ... and bronchioles (a type of structure in the lungs ... company’s mission to develop novel protein therapeutics for the ... directors decided to change the name to mark the ...
Breaking Biology Technology:ADM and DNA2.0 Enter Into Protein Engineering Technology Access and Service Agreement 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 2Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 3Velocity Pharmaceutical Development, LLC and Tigercat Pharma, Inc. Announce Phase 2 Results for VPD-737 in Patients With Chronic Pruritus 4AeroScout Founder Joins GlassesOff's Board of Directors 2AeroScout Founder Joins GlassesOff's Board of Directors 3Maryland-based Biotech Company's Path Forward in Treating Respiratory Diseases Sparks Name Change 2
... Glasses embedded with a telescope,promise to make ... drive and do,other activities requiring sharper distance vision. ... these innovative glasses,over earlier devices in an article ... Optics, mailed to subscribers in print form this,month., ...
... NEW YORK, July 24 American Oriental,Bioengineering, Inc. (NYSE: ... release,second quarter 2008 financial results on Monday, August 11, ... a conference call at 5:00 pm ET on August ... Listeners may,access the call by dialing 1-800-599-9816 or 1-617-847-8705 ...
... July 24 Poniard,Pharmaceuticals, Inc. (Nasdaq: PARD ... that it will hold a conference call to ... corporate update,including an update on the clinical development ... McMahon, Ph.D., chairman and chief,executive officer, Ronald A. ...
Cached Biology Technology:Telescope Embedded in Spectacle Lens Promises to Make Driving Easier for Visually Impaired 2Telescope Embedded in Spectacle Lens Promises to Make Driving Easier for Visually Impaired 3Poniard Pharmaceuticals to Host Second Quarter 2008 Financial Results Conference Call on July 31 2
(Date:12/15/2014)... 2014 Research and Markets ( ... "Global Facial Recognition Market 2015-2019" report ... http://photos.prnewswire.com/prnh/20130307/600769 Facial recognition is a ... recognition system measures the overall facial feature of ... and the distance between eyes. Facial recognition is ...
(Date:12/11/2014)... , Dec. 10, 2014  Data Sciences ... monitoring, has released a new series of digital ... preclinical toxicology researchers. M series, part of the ... collect the best possible physiologic data when incorporating ... Adding functional endpoints to toxicology studies has evolved ...
(Date:12/10/2014)... CIE San Diego has launched an innovative ... tissue that enhances care coordination among social service and ... information; earned a second $1 million grant from the ... aging in community and; will be recognized as a ... 4-6p. CIE San Diego today announced ...
Breaking Biology News(10 mins):Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 2Global Facial Recognition Market 2015-2019: Key Vendors are 3M Cogent, Cognitec Systems, NEC and Safran Group 3New telemetry implants expected to change how large animal toxicology studies are conducted 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 2Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 3Community Information Exchange San Diego Launches Pilot, Secures $1 Million Expansion Grant, and Becomes a "Live Well San Diego" Partner 4
... multiple sclerosis could be reversed by activating stem cells that ... has shown. Researchers from the Universities of Cambridge and ... known as myelin sheaths that protect nerve fibres ... showed how this mechanism can be exploited to make the ...
... For the first time, the barriers to breastfeeding are ... the release today of Healthy People 2020, ( http://www.hhs.gov/news/press/2010pres/12/20101202a.html ... has targeted the new 10-year goals for our nation,s ... "This is a major step forward for ...
... e-cigarettes), also called "electronic nicotine delivery systems," are ... is available on their health effects. In the ... malls in most states and on the Internet. ... this question, researchers at the University of California, ...
Cached Biology News:Study reveals new possibility of reversing damage caused by MS 2New public health goals tackle obstacles to breastfeeding success 2Electronic cigarettes are unsafe and pose health risks, UC Riverside study finds 2Electronic cigarettes are unsafe and pose health risks, UC Riverside study finds 3
BAI-1 (T-20)...
MOUSE ANTI HUMAN CYTOKERATIN 1-8...
GOAT ANTI HUMAN PSA (ISOFORM 1)...
... peptide derived from the N-terminal region of ... Specificity: Specific for the N-terminus of the ... Dog Rat Mouse (positive controls: MDCK-II A431 ... heart blood vessel and brain mossy fiber ...
Biology Products: