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:9/15/2014)... , 15 septembre 2014 La deuxième ... (IPAW) (semaine internationale sur la sensibilisation au ... Initiative conjointe de la Plasma Protein Therapeutics ... membres , l,IPAW vise à : ... de la collecte du plasma-aphérèse , Reconnaître ...
(Date:9/14/2014)... 2014 UMBC’s Biotechnology Graduate Programs’ ... October 21, 2014, from 12:00 to 1:00 p.m. EDT. ... innovative curriculum and practice-oriented instruction, designed for working professionals. ... help advance their career in the biotechnology industry. , ... , About UMBC’s Biotechnology Graduate Programs, UMBC offers ...
(Date:9/12/2014)... a magnet using an electric field (magnetoelectric memory ... the next-generation technology for information processing and storage. ... effect, due to the coexistence of electric and ... of spontaneous electric and magnetic polarizations is rare ... of the MEM effect. This article briefly reviews ...
(Date:9/12/2014)... September 12, 2014 Today, “The University” ... Indiegogo. , The film, directed by former Charlie ... Shimon Peres, Ashton Kutcher, Will.i.Am, Michio Kaku, and others. ... there’s only one university in the world devoted to ... the lives of a billion people: Singularity University. Matt ...
Breaking Biology Technology:L' International Plasma Awareness Week célébrera les donneurs et braquera les projecteurs sur les maladies rares 2L' International Plasma Awareness Week célébrera les donneurs et braquera les projecteurs sur les maladies rares 3UMBC Biotechnology Graduate Programs’ Virtual Info Session, October 21, 2014 2Documentary Film that Follows Singularity University Students as They Change the World Launches its IndieGoGo Fundraising Campaign 2
... , , , For purification of up to 10 mg ultrapure plasmid , ... for efficient , purification of plasmid DNA , , ... benefits , , ... by 2x CsCl-gradient centrifugation , , ...
... , , , , , ... Svegliati, Michele Luchetti, and Armando Gabrielli , Laboratorio ... Scientifico, Ancona, Italy , , ... GC-rich sequences difficult to amplify by PCR. This article ...
... , , , QIAGEN introduces the ... automated, high-throughput DNA purification , from high-copy plasmids. ... for a lysate clearing step. Plasmid DNA purification is performed using ... procedure. The protocol , is faster and easier ...
Cached Biology Technology:Successful PCR amplification and subcloning of a GC-rich DNA fragment 2Successful PCR amplification and subcloning of a GC-rich DNA fragment 3Successful PCR amplification and subcloning of a GC-rich DNA fragment 4Successful PCR amplification and subcloning of a GC-rich DNA fragment 5DirectPrep 96 Miniprep System for cost-effective, high-throughput plasmid , DNA purification 2DirectPrep 96 Miniprep System for cost-effective, high-throughput plasmid , DNA purification 3DirectPrep 96 Miniprep System for cost-effective, high-throughput plasmid , DNA purification 4
(Date:9/15/2014)... 2014: Globally, cardiovascular disease (CVD) claims 17 million lives ... an additional 9.4 million. 1 New research presented ... Congress in Montpellier, France on September 15, 2014, suggests ... role. , At the Milk and Dairy ... milk and risk for hypertension and CVD was examined ...
(Date:9/15/2014)... available in German . ... the fossil energy carrier natural gas offers a variety ... Nevertheless, a consequent market penetration is still pending because ... Scientists of the Helmholtz Centre for Environ-mental Research (UFZ) ... Members of the IEA Task 37 (Energy from Biogas) ...
(Date:9/12/2014)... , Sept. 12, 2014 Research and ... "Global IC Card Management System Industry Report 2014" ... IC Card Management System Industry Report 2014 is a ... the global IC card management system. The ... definitions, classifications, applications and industry chain structure. The IC ...
Breaking Biology News(10 mins):Dairy consumption linked to lower blood pressure and cardiovascular disease risk 2The biomethane market needs clear frame conditions for further growth 2The biomethane market needs clear frame conditions for further growth 3Global IC Card Management System Industry Report 2014 2
... LSU,s Sibel Bargu, along with her former graduate student Ana ... LSU,s School of the Coast & Environment, has discovered toxic ... the first time. The recent findings were published in the ... journals, the Proceedings of the National Academy of Sciences ...
... dioxide injected deep underground to help fight climate change could ... up levels of contaminants in the water tenfold or more ... scientists. Based on a year-long analysis of core samples ... contamination is real, but there are ways to avoid or ...
... 9, 2010 For Immediate Release Scientists from ... identified for the first time a novel mechanism that ... body,s natural 24-hour physiological cycle. These new findings could ... shift work, and sleep disturbances, but also for disorders ...
Cached Biology News:LSU oceanography researcher discovers toxic algae in open water 2LSU oceanography researcher discovers toxic algae in open water 3Leaking underground CO2 storage could contaminate drinking water 2Scripps Research scientists identify new mechanism regulating daily biological rhythms 2Scripps Research scientists identify new mechanism regulating daily biological rhythms 3
...
Request Info...
... vectors carry the kanamycin resistance gene that ... Spontaneous generation of multiple insertion events can ... of Geneticin Reagent. Pichia transformants are selected ... level of resistance to Geneticin Reagent. The ...
... Synthetic peptide derived from the C-terminal ... Math-2. Specificity: Specific for the ... (positive controls: human U251 A172 IMR-32 ... rat brain homogenates)Storage: Store at -20C ...
Biology Products: