Navigation Links
Penn material scientists turn light into electrical current using a golden nanoscale system
Date:2/12/2010

PHILADELPHIA - Material scientists at the Nano/Bio Interface Center of the University of Pennsylvania have demonstrated the transduction of optical radiation to electrical current in a molecular circuit. The system, an array of nano-sized molecules of gold, respond to electromagnetic waves by creating surface plasmons that induce and project electrical current across molecules, similar to that of photovoltaic solar cells.

The results may provide a technological approach for higher efficiency energy harvesting with a nano-sized circuit that can power itself, potentially through sunlight. Recently, surface plasmons have been engineered into a variety of light-activated devices such as biosensors.

It is also possible that the system could be used for computer data storage. While the traditional computer processor represents data in binary form, either on or off, a computer that used such photovoltaic circuits could store data corresponding to wavelengths of light.

Because molecular compounds exhibit a wide range of optical and electrical properties, the strategies for fabrication, testing and analysis elucidated in this study can form the basis of a new set of devices in which plasmon-controlled electrical properties of single molecules could be designed with wide implications to plasmonic circuits and optoelectronic and energy-harvesting devices.

Dawn Bonnell, a professor of materials science and the director of the Nano/Bio Interface Center at Penn, and colleagues fabricated an array of light sensitive, gold nanoparticles, linking them on a glass substrate. Minimizing the space between the nanoparticles to an optimal distance, researchers used optical radiation to excite conductive electrons, called plasmons, to ride the surface of the gold nanoparticles and focus light to the junction where the molecules are connected. The plasmon effect increases the efficiency of current production in the molecule by a factor of 400 to 2000 percent, which can then be transported through the network to the outside world.

In the case where the optical radiation excites a surface plasmon and the nanoparticles are optimally coupled, a large electromagnetic field is established between the particles and captured by gold nanoparticles. The particles then couple to one another, forming a percolative path across opposing electrodes. The size, shape and separation can be tailored to engineer the region of focused light. When the size, shape and separation of the particles are optimized to produce a "resonant" optical antennae, enhancement factors of thousands might result.

Furthermore, the team demonstrated that the magnitude of the photoconductivity of the plasmon-coupled nanoparticles can be tuned independently of the optical characteristics of the molecule, a result that has significant implications for future nanoscale optoelectronic devices.

"If the efficiency of the system could be scaled up without any additional, unforeseen limitations, we could conceivably manufacture a one-amp, one-volt sample the diameter of a human hair and an inch long," Bonnell said.


'/>"/>

Contact: Jordan Reese
jreese@upenn.edu
215-573-6604
University of Pennsylvania
Source:Eurekalert  

Related biology technology :

1. New material absorbs, conserves oil
2. An easy way to see the worlds thinnest material
3. Metamaterials could reduce friction in nanomachines
4. Water droplets direct self-assembly process in thin-film materials
5. £4.9 million to develop metamaterials for invisibility cloaks and perfect lenses
6. LANL Roadrunner simulates nanoscale material failure
7. New material could boost data storage, save energy
8. Tiny test tube experiment shows reaction of melting materials at the nano scale
9. Zeus: Dedicated to Advancing Biomaterial Technology with Enhanced Capabilities
10. EPA announces research strategy to study nanomaterials
11. Reportlinker Adds Nanoporous Materials Report
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Penn material scientists turn light into electrical current using a golden nanoscale system
(Date:2/24/2017)... Island, NY (PRWEB) , ... February 24, 2017 , ... ... rate. Founded in late 2014, FireflySci had the goal of bringing their powerful ... that goal continues to shape the path that FireflySci is going on as they ...
(Date:2/23/2017)... NEW YORK , Feb. 23, 2017 /PRNewswire/ ... leading digital health company, and Digital Noema ... and remote patient monitoring, announce they are partnering ... DN Telehealth maximizes collaboration compatibility for ... consultations beyond a physical clinical setting to include ...
(Date:2/23/2017)... 2017  MIODx announced today that it has ... technologies from the University of California, San Francisco ... monitor a patient for response to immune checkpoint ... second license extends the technology with a method ... have an immune-related adverse event (IRAE) from their ...
(Date:2/23/2017)... ... February 23, 2017 , ... ... novo clearance to begin marketing the SPEAC® System, the Brain Sentinel® Seizure Monitoring ... home or in healthcare facilities during periods of rest. A lightweight, non-invasive monitor ...
Breaking Biology Technology:
(Date:2/7/2017)...   MedNet Solutions , an innovative SaaS-based eClinical ... research, is pleased to announce that the latest release ... flexible and award winning eClinical solution, is now available ... is a proven Software-as-a-Service (SaaS) clinical research technology platform ... also delivers an entire suite of eClinical tools to ...
(Date:2/7/2017)... LONG BEACH, New York , February 7, 2017 ... formerly known as ID Global Solutions Corporation [OTC: IDGS], ... identification, identity management and electronic transaction processing services, is ... a reorganization of the Company. Effective January ... Chairman of the Board of Directors, CEO and President. ...
(Date:2/3/2017)... , Feb. 3, 2017  Texas Biomedical Research Institute ... Larry Schlesinger as the Institute,s new President ... Biomed effective May 31, 2017. He is currently the Chair ... of the Center for Microbial Interface Biology at Ohio State ... as the new President and CEO of Texas Biomed," said ...
Breaking Biology News(10 mins):