Navigation Links
Harnessing the energy of the Sun: New technique improves artificial photosynthesis
Date:5/10/2011

This discovery will make it possible to improve photoelectrochemical cells. In the same way that plants use photosynthesis to transform sunlight into energy, these cells use sunlight to drive chemical reactions that ultimately produce hydrogen from water. The process involves using a light-sensitive semi-conducting material such as cuprous oxide to provide the current needed to fuel the reaction. Although it is not expensive, the oxide is unstable if exposed to light in water. Research by

Adriana Paracchino and Elijah Thimsen, published May 8, 2011 in the journal Nature Materials, demonstrates that this problem can be overcome by covering the semiconductor with a thin film of atoms using the atomic layer deposition (ALD) technique.

Under the supervision of Professor Michael Grtzel in EPFL's Laboratory of Photonics and Interfaces, the two scientists achieved this remarkable feat by combining techniques used at the industrial scale, and then applying them to the problem of producing hydrogen. With their process, cuprous oxide can be simply and effectively protected from contact with water, making it possible to use it as a semiconductor. The advantages are numerous: cuprous oxide is abundantly available and inexpensive; the protective layer is completely impermeable, regardless of the roughness of the surface; and the process can easily be scaled up for industrial fabrication.

A promising technique

The research team developed the technique by "growing" layers of zinc oxide and titanium oxide, one atom-thick layer at a time, on the cuprous oxide surface. By using the ALD technique, they were able to control the thickness of the protective layer down to the precision of a single atom over the entire surface. This level of precision guarantees the stability of the semiconductor while preserving all of its hydrogen-producing efficiency. The next step in the research will be to improve the electrical properties of the protective
'/>"/>

Contact: Adriana Paracchino
adriana.paracchino@epfl.ch
Ecole Polytechnique Fdrale de Lausanne
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Harnessing the divas of the nanoworld
2. The photon force is with us: Harnessing light to drive nanomachines
3. Story tips from the Department of Energys Oak Ridge National Laboratory
4. LSU-AgCenter and Aquatic Energy Recommended for Clean Technology Grant
5. Measurement of hot electrons could have solar energy payoff
6. Equinox Summit: Energy 2030 -- inspiring ingenuity in energy solutions
7. Plasma nanoscience needed for green energy revolution
8. Story tips from the Department of Energys Oak Ridge National Laboratory: April 2011
9. Honeywells Envergent Technologies Selected by Malaysian Company for Renewable Energy Project
10. VG Energy Report is Featured on EnergyBoom.com
11. New frozen smoke may improve robotic surgery, energy storage
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)... 22, 2015   Cypher Genomics, Inc., the ... SQNM ), the leading molecular diagnostics ... generation noninvasive prenatal tests (NIPT). Through this agreement, ... Mantis™, to advance analysis of clinically-relevant fetal sub-chromosomal ...
(Date:12/25/2014)... The report “Service Quality Management and Telco Customer Experience ... Global Advancements, Worldwide Forecasts & Analysis (2014-2019)” defines and ... of revenues. , Browse 152 market data tables, ... on “Service Quality Management (SQM) and Telco Customer Experience ...
(Date:12/24/2014)... 24, 2014   BioLife Solutions , Inc. (NASDAQ: ... clinical grade hypothermic storage and cryopreservation freeze ... cells and tissues  ("BioLife" or the "Company"), today announced that ... May 4, 2015 (the "Annual Meeting"). Because the ...
(Date:12/24/2014)... BOSTON, MA (PRWEB) December 23, 2014 ... series is designed to introduce cutting edge communication ... partners of platform upgrades. This webinar series demonstrates ... their quest to leverage web conferencing’s most innovative ...
Breaking Biology Technology:Cypher Genomics and Sequenom Announce Development Agreement 2Cypher Genomics and Sequenom Announce Development Agreement 3Cypher Genomics and Sequenom Announce Development Agreement 4Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 2Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 3Service Quality Management Market worth $2.1 Billion & Telco Customer Experience Management Market worth $2.3 Billion by 2019 – New Report by MarketsandMarkets 4BioLife Solutions Sets Date for Annual Meeting of Stockholders 2SoundConnect Launches Leading Edge Business Communications Webinar Series 2SoundConnect Launches Leading Edge Business Communications Webinar Series 3
... Up in the sky. It's a bird. It's a plane. It's ... denial in a single bound. Indeed, lately the media has been ... to result from the mass exodus of Baby Boomers from the ... believe that this trend and its impacts on businesses are black ...
... Milwaukee, Wis. - The National Cancer Institute ... Medical College of Wisconsin to study the growth ... second successful renewal of the grant that was first awarded ... ongoing principal investigator. , ,She and other investigators are developing ...
... This is the ninth in a series of articles ... sectors. The most recent article focused on worker classification. ... The idea is developed. Lawyers and accountants are on ... is formed. The name has been chosen. Perhaps workers, ...
Cached Biology Technology:Shades of gray: Business impacts of an aging workforce 2Shades of gray: Business impacts of an aging workforce 3Shades of gray: Business impacts of an aging workforce 4Shades of gray: Business impacts of an aging workforce 5Shades of gray: Business impacts of an aging workforce 6Early Stage, Step 9: Raising capital in the securities landscape 2Early Stage, Step 9: Raising capital in the securities landscape 3Early Stage, Step 9: Raising capital in the securities landscape 4
(Date:1/22/2015)... has launched its new NXG series of time clocks with ... higher standard for collecting attendance and labor data and complements ... touch screen interface and seamless connection to cloud-based iSolved, the ... for the small to mid-size employer. The G2 ...
(Date:12/19/2014)... Research and Markets ( http://www.researchandmarkets.com/research/8kmfcn/iphone_5s ) has ... Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report" ... http://photos.prnewswire.com/prnh/20130307/600769 Following the acquisition of ... feature with the iPhone 5S. It is currently the ...
(Date:12/17/2014)... 2014 The Defense Logistics Agency is insourcing its ... counterfeit microcircuits from entering into its supply chain. ... anti-counterfeit initiative dubbed DNA marking. The capability will validate ... throughout the supply chain. The new quality control measures ...
Breaking Biology News(10 mins):Infinisource's NXG series sets new time clock standard 2iPhone 5S Fingerprint Sensor - Apple/AuthenTec TMDR92 & Sapphire - Technology Report 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3
... shown that not all individuals carrying the Romanian "Basarab" ... the real-life Dracula, can be direct biological descendants of ... historical and geographical southern region of present-day Romania, for ... Vlad III the Impaler, commonly known as Dracula. The ...
... high-doses of interleukin-2 (IL-2) has been the preferred treatment ... article published in the current issue of Cancer ... Ann Liebert, Inc. ( http://www.liebertpub.com ), explores whether or ... The article is available free online at the ...
... thought that fin whales in the Strait of Gibraltar and ... this species of whale in the Mediterranean. However, an international ... their population has been overestimated by including specimens from the ... the noise generated by human activity affects their survival., In ...
Cached Biology News:'Basarab' surname may not indicate direct relation to Vlad the Impaler 2The fin whale, under more threat in the Mediterranean than thought 2The fin whale, under more threat in the Mediterranean than thought 3
Rabbit polyclonal antibody to Glutathione-S-Transferase (GST)...
... Gas Chromatograph/Mass Spectrometer, utilizing many of ... Plus, offers high throughput and excellent ... performance-to-cost ratio. Like the GCMS-QP2010 Plus, ... velocity for optimum separation, 20 temperature ...
Chicken polyclonal antibody to Glutathione-S-Transfrease (GST)...
... The Precision XS uniquely combines a single-channel ... and an 8-channel bulk reagent dispenser all ... to transfers using disposable pipette tips, the ... bulk reagent dispenser is available for transferring ...
Biology Products: