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:9/18/2014)... (PRWEB) September 18, 2014 SeqLL ... Sequencing (tSMS™) technology, announced today the closing of ... investment, led by Genomic Diagnostic Technologies, will increase ... diagnostic applications. , Founded in March 2013 by ... Bioinformatics Analyst at Helicos BioSciences, SeqLL has continued ...
(Date:9/18/2014)... promoted as aids to weight loss and diabetes prevention, ... metabolic disease; and they do it in a surprising ... gut microbiota the substantial population of bacteria residing ... in mice and humans, were published today in ... of the Weizmann Institute,s Immunology Department, who led this ...
(Date:9/18/2014)... memory device for computing may have just taken an ... New York led by chemist Stephen O,Brien have discovered ... properties. , Combining both properties is very exciting scientifically ... for the devices that might ultimately be designed, in ... a single material, however, has proved difficult until now. ...
(Date:9/18/2014)... September 24 marks ASEA's "Meet ASEA" ... the manufacturer of the world's first and only redox ... , The Mexico City event features renowned speakers ... ASEA Field Leader Shawn Catmull from Draper, UT. , ... Physics from the University of Utah and devotes his ...
Breaking Biology Technology:SeqLL Closes Series-A Funding Round for Expansion of Single Molecule Sequencing 2Gut bacteria, artificial sweeteners and glucose intolerance 2Gut bacteria, artificial sweeteners and glucose intolerance 3Oxides discovered by CCNY team could advance memory devices 2Announcing the ASEA Mexico Grand Opening Tour Beginning September 18th 2
... Inc.,(Nasdaq: SSRX ), a leading biotechnology company ... in China, announces that David Chen, Chief Operating ... Unplugged Conference in New,York on Tuesday, September 9, ... the latest investor presentation will be available on ...
... Company, Inc. (IPM) today announced it was named ... fastest-growing private companies nationwide for a second consecutive ... to a broad range of industries, helping companies ... identified as one of the Chicago area’s top ...
... Mass., Aug. 25 Anthill Technologies, Inc. today,announced ... Zafgen, Inc. to apply,its high-speed chemistry technologies and ... Boston-based biopharmaceutical company which,develops obesity therapy based on ... the agreement, Anthill will use its ACOS(TM) high-speed ...
Cached Biology Technology: Integrated Project Management Named to "Inc. 5000" for Second Year : One of the Top 100 Fastest-Growing Companies in Chicago Area 2
(Date:9/18/2014)... probably the ultimate form of camouflage: you don,t just ... strategy is not as uncommon as you might think. ... USA, explains that the larval life stages of many ... of the anatomy that most creatures cannot make transparent. ... to shield each individual eye unit with an opaque ...
(Date:9/17/2014)... UCLA atmospheric scientists were instrumental in the creation of ... tool to classify the fire threat potential of the ... a spark into an inferno. The index was introduced ... with UCLA and San Diego Gas and Electric. , ... to "extreme" that will be used to help fire ...
(Date:9/17/2014)... SAN DIEGO, Calif. (Sept. 17, 2014) A rare genetic ... autism, according to a recent joint investigation by researchers ... California, San Diego. In addition to suggesting better treatment ... offers more clues into the genetic underpinnings of autism., ... to the National Institutes of Health. It occurs in ...
Breaking Biology News(10 mins):Transparent larvae hide opaque eyes behind reflections 2UCLA scientists play key role in developing new Santa Ana Wildfire Threat Index 2A link between Jacobsen syndrome and autism 2
... 21, 2011) -- In a surprising new study, researchers ... software have made a startling discovery that rules out ... how bacteria self-organize into multicellular aggregate mounds. The study ... Georgia appears online this week in the Proceedings ...
... University of Illinois entomology professor and department ... Tyler Prize for Environmental Achievement, an international ... in an outstanding manner to scientific knowledge and ... of the world." Previous Tyler Prize recipients ...
... -- Marine biologists have solved a conundrum that has stumped ... It may sound simple, but the task is actually complex ... oceans, coral reefs and the marine life that populate them. ... scientists from the University of Miami (UM) and NOAA Fisheries ...
Cached Biology News:Biofilm reorganization: Back to the theoretical drawing board 2Biofilm reorganization: Back to the theoretical drawing board 3Illinois entomology professor May Berenbaum to receive 2011 Tyler Prize 2Illinois entomology professor May Berenbaum to receive 2011 Tyler Prize 3One fish, two fish … reef fish 2
Lyophilized solid. Suitable for evaluating functional activity of human complement components and for other research requiring a high level of hemolytic activity. ...
... systems are high-precision microarrayers capable of ... samples. VersArray ChipWriter Pro systems set ... and reproducibility to deliver unparalleled quality ... Their modular component design and flexible ...
Thermal printer paper is used with the thermal printer for the VersaFluor fluorometry systems. Supplied as 10 rolls....
... Gel extraction kit, 100 preps Storage: The kit ... For longer storage, keep all contents of the ... column purification kit utilizes a silica-gel based membrane ... fragments in the presence of specialized binding buffers. ...
Biology Products: