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:5/5/2015)... and WASHINGTON, D.C., USA (PRWEB) May 05, 2015 ... U.S. export regulations covering a wide range of key ... say are hampering global competitiveness of U.S. industry. To ... a webinar on 12 May on the ... which governs the commodities covered by International Traffic in ...
(Date:5/5/2015)... Research and Markets ( http://www.researchandmarkets.com/research/4r95kr/clinical ... "Clinical Laboratory, Molecular Diagnostics and Genomic Testing Services ... Europe Version" report to their offering. ... of molecular diagnostics and pharmacogenics hold the promise ... that is moving out of the national and ...
(Date:5/5/2015)... , May 5, 2015   Tocagen Inc. ... David R. Parkinson , M.D., a venture ... appointed to the board of directors of Tocagen. ... experience in oncology clinical development, including leading clinical ... global approvals of the cancer therapeutics Gleevec®, Femara®, ...
(Date:5/5/2015)... -- Indianapolis-based medical device manufacturer NICO Corporation is seeing ... including the BrainPath® and Myriad™ technologies offering a ... and then removing affected tissue. More than 1,600 ... institutions throughout the United States ... 12 abstracts, three peer-reviewed publications, and seven presentations ...
Breaking Biology Technology:Comments needed now from photonics industry on revisions of U.S. export rules 2Comments needed now from photonics industry on revisions of U.S. export rules 3Comments needed now from photonics industry on revisions of U.S. export rules 4European Clinical Laboratory, Molecular Diagnostics and Genomic Testing Services Market 2015-2019 2Tocagen Appoints David R. Parkinson, M.D., to the Board of Directors 2Tocagen Appoints David R. Parkinson, M.D., to the Board of Directors 3Tocagen Appoints David R. Parkinson, M.D., to the Board of Directors 4NICO Corporation Gains Market Expansion after Multiple Published Clinical Articles Support Access Technology for Deep Brain Lesions 2NICO Corporation Gains Market Expansion after Multiple Published Clinical Articles Support Access Technology for Deep Brain Lesions 3
... N.C., March 21, 2011 Although top bio-pharmaceutical companies ... the successful launch of a new product, increasing competition ... KOL engagement. Consequently, the role of Medical Science Liaisons ... grown dramatically in recent years. In ...
... Reportlinker.com announces that a new market research ... Global Angiongenesis Inhibitors and Stimulators ... This report analyzes the worldwide ... US$ Million by the following product segments ...
... 21, 2011 Reportlinker.com announces that a new market ... Global Biochips Industry http://www.reportlinker.com/p098235/Global-Biochips-Industry.html ... for Biochips in US$ Million by the following product ... Annual estimates and forecasts are provided for the period ...
Cached Biology Technology:Newly Updated for 2011: Medical Science Liaison Study Shows Growth in KOL Outreach, Impact 2Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 2Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 3Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 4Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 5Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 6Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 7Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 8Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 9Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 10Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 11Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 12Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 13Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 14Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 15Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 16Reportlinker Adds Global Angiongenesis Inhibitors and Stimulators Industry 17Reportlinker Adds Global Biochips Industry 2Reportlinker Adds Global Biochips Industry 3Reportlinker Adds Global Biochips Industry 4Reportlinker Adds Global Biochips Industry 5Reportlinker Adds Global Biochips Industry 6Reportlinker Adds Global Biochips Industry 7Reportlinker Adds Global Biochips Industry 8Reportlinker Adds Global Biochips Industry 9Reportlinker Adds Global Biochips Industry 10Reportlinker Adds Global Biochips Industry 11Reportlinker Adds Global Biochips Industry 12Reportlinker Adds Global Biochips Industry 13Reportlinker Adds Global Biochips Industry 14Reportlinker Adds Global Biochips Industry 15Reportlinker Adds Global Biochips Industry 16
(Date:4/13/2015)... NEW YORK , April 13, 2015 /PRNewswire/ ... study by TechSci Research, "Global Biometrics Market Forecast & ... to register a CAGR of around 14% till ... various governments for large scale implementation and review ... technology and launch of new products with greater ...
(Date:4/6/2015)... , Apr. 6, 2015 NXT-ID, Inc. (NASDAQ: ... biometric authentication company focused on the growing mobile ... provisional patent 62/143028 for MINIATURE, MULTI-PURPOSE ... TRANSFER  NXT-ID introduces a new revolutionary ... patent surrounds the use of miniature antenna modules ...
(Date:4/1/2015)...  NXT-ID, Inc. (NASDAQ: NXTD ) ("NXT-ID" or ... growing mobile commerce market, announces the second shipment of ... to early access pre-order customers. Feedback ... outlets including Walmart, Target, AT&T, Dunkin, Donuts, Stop & ... at all outlets and very easy to use. Several ...
Breaking Biology News(10 mins):Global Biometrics Market to Cross US$ 21 Billion by 2020: TechSci Research 2NXT-ID Patents Miniature, Low Power Wireless Magnetic Stripe 2NXT-ID Patents Miniature, Low Power Wireless Magnetic Stripe 3NXT-ID Patents Miniature, Low Power Wireless Magnetic Stripe 4NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 2NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 3NXT-ID Reports Second Shipment of Wocket Smart Wallets Underway to Early Access Pre-order Customers and Provides User Feedback 4
... Institute of New York University (NYU-Poly) and the NYU ... their lab that is five times more efficient in ... vectors. This novel complex is a peptide-polymer hybrid, assembled ... to carry DNA into cells. Results of ...
... The same tiny cellulose crystals that give trees and ... now been shown to have the stiffness of steel. ... new class of biomaterials with wide-ranging applications, such as ... precise models based on the atomic structure of cellulose ...
... Supramolecular chemistry, aka chemistry beyond the molecule, in ... by non-covalent bonds, is just beginning to come ... Metal-organic frameworks (MOFs) are commanding much of the ... but a new player has joined the field ...
Cached Biology News:Researchers engineer a hybrid 5 times more effective in delivering genetic material into cells 2Cellulose nanocrystals possible 'green' wonder material 2Cellulose nanocrystals possible 'green' wonder material 3SOFS take to water 2SOFS take to water 3
Taq DNA Polymerase (T. aquaticus), 250 units. For PCR and other procedures requiring DNA polymerase activity at elevated temperatures. Category: Nucleotides & Enzymes & Biochemicals, Modifying Enzyme...
Recombinant DNA polymerase from Thermus aquaticus expressed in E. coli; 5 units/L; 1 tube of 1, 000 units enzyme/tube w/Buffer II and MgCl2...
Recombinant DNA polymerase from Thermus aquaticus expressed in E. coli; 5 units/uL; 25 tubes of 1, 000 units enzyme/tube w/ Buffer I...
A robust formulation of Taq Polymerase supplied with a 10X colored reaction buffer which allows Direct Gel-Loading...
Biology Products: