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--- On Mon, 11/12/12, Bukan Pedanda <[email protected]> wrote: From: Bukan Pedanda <[email protected]> Subject: [proletar] SD: New Way to Split Water Molecules Into Hydrogen and Oxygen: Breakthrough for To: [email protected] Received: Monday, November 12, 2012, 12:47 PM Boleh dibilang penelitian ilmiah begini sekarang ini dilakukan oleh kafir dan bukan oleh orang islam yang rata-rata dungu-dungu kayak anjing dan lebih senang menghabiskan waktunya untuk saling berbunuhan.. -- Web address: http://www.sciencedaily.com/releases/2012/11/ 121112095943.htm New Way to Split Water Molecules Into Hydrogen and Oxygen: Breakthrough for Solar Energy Conversion and Storage? enlarge Using the power of the sun and ultrathin films of iron oxide, Israeli researchers have found a novel way to split water molecules into hydrogen and oxygen. The breakthrough could lead to less expensive, more efficient ways to store solar energy in the form of hydrogen-based fuels. (Credit: © Sean Gladwell / Fotolia) ScienceDaily (Nov. 12, 2012) — Using the power of the sun and ultrathin films of iron oxide (commonly known as rust), Technion-Israel Institute of Technology researchers have found a novel way to split water molecules into hydrogen and oxygen. The breakthrough, published this week in Nature Materials, could lead to less expensive, more efficient ways to store solar energy in the form of hydrogen-based fuels. This could be a major step forward in the development of viable replacements for fossil fuels. "Our approach is the first of its kind," says lead researcher Associate Prof. Avner Rothschild, of the Department of Materials Science and Engineering. "We have found a way to trap light in ultrathin films of iron oxide that are 5,000 times thinner than typical office paper. This is the enabling key to achieving high efficiency and low cost. " Iron oxide is a common semiconductor material, inexpensive to produce, stable in water, and – unlike other semiconductors such as silicon – can oxidize water without itself being oxidated, corroded, or decomposed. But it also presents challenges, the greatest of which was finding a way to overcome its poor electrical transport properties. Researchers have struggled for years with the tradeoff between light absorption and the separation and collection of photogenerated charge carriers before they die out by recombination. "Our light-trapping scheme overcomes this tradeoff, enabling efficient absorption in ultrathin films wherein the photogenerated charge carriers are collected efficiently," says Prof. Rothschild. "The light is trapped in quarter-wave or even deeper sub-wavelength films on mirror-like back reflector substrates. Interference between forward- and backward-propagating waves enhances the light absorption close to the surface, and the photogenerated charge carriers are collected before they die off." The breakthrough could make possible the design of inexpensive solar cells that combine ultrathin iron oxide photoelectrodes with conventional photovoltaic cells based on silicon or other materials to produce electricity and hydrogen. According to Prof. Rothschild, these cells could store solar energy for on demand use, 24 hours per day. This is in strong contrast to conventional photovoltaic cells, which provide power only when the sun is shining (and not at night or when it is cloudy). The findings could also be used to reduce the amount of extremely rare elements that the solar panel industry uses to create the semiconductor material in their second-generation photovoltaic cells. The Technion team's light trapping method could save 90% or more of rare elements like Tellurium and Indium, with no compromise in performance. The Technion-Israel Institute of Technology is a major source of the innovation and brainpower that drives the Israeli economy, and a key to Israel's renown as the world's "Start-Up Nation." Its three Nobel Prize winners exemplify academic excellence. Technion people, ideas and inventions make immeasurable contributions to the world including life-saving medicine, sustainable energy, computer science, water conservation and nanotechnology. American Technion Society (ATS) donors provide critical support for the Technion—more than $1.74 billion since its inception in 1940. Based in New York City, the ATS and its network of chapters across the U.S. provide funds for scholarships, fellowships, faculty recruitment and chairs, research, buildings, laboratories, classrooms and dormitories, and more. Share this story on Facebook, Twitter, and Google: Other social bookmarking and sharing tools: Share on reddit Share on stumbleupon Share on pinterest_share Share on blogger Share on digg Share on fark Share on linkedin Share on myspace Share on newsvine | 45 Story Source: The above story is reprinted from materials provided by American Technion Society. The original article was written by Kevin Hattori. Note: Materials may be edited for content and length. For further information, please contact the source cited above. Journal Reference: Hen Dotan, Ofer Kfir, Elad Sharlin, Oshri Blank, Moran Gross, Irina Dumchin, Guy Ankonina, Avner Rothschild. Resonant light trapping in ultrathin films for water splitting. Nature Materials, 2012; DOI: 10.1038/nmat3477 Need to cite this story in your essay, paper, or report? Use one of the following formats: APA MLA American Technion Society (2012, November 12). New way to split water molecules into hydrogen and oxygen: Breakthrough for solar energy conversion and storage?. ScienceDaily. Retrieved November 12, 2012, from http://www.sciencedaily.com /releases/2012/11/121112095943.htm Note: If no author is given, the source is cited instead. Disclaimer: Views expressed in this article do not necessarily reflect those of ScienceDaily or its staff. [Non-text portions of this message have been removed] ------------------------------------ Post message: [email protected] Subscribe : [email protected] Unsubscribe : [email protected] List owner : [email protected] Homepage : http://proletar.8m.com/Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/proletar/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/proletar/join (Yahoo! 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