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    April 16, 2018 7:24 AM +0430

    HOUSTON Cheap Tyler Ennis Jersey , Dec. 2 (Xinhua) -- Humble aluminum's plasmonic properties may make it far more valuable than gold and silver for certain applications, reckons a new research done by scientists with Rice University of the United States.

    Because aluminum, as nanoparticles or nanostructures, displays optical resonances across a much broader region of the spectrum than either gold or silver, it may be a good candidate for harvesting solar energy and for other large-area optical devices and materials that would be too expensive to produce with coinage metals Cheap Jared Spurgeon Jersey , said the university based in Houston, a city in the U.S. state of Texas, in a press release to announce the latest research result Monday.

    Until recently, aluminum had not yet been seen as useful for plasmonic applications for several reasons: It naturally oxidizes, and some studies have shown dramatic discrepancies between the resonant color of fabricated nanostructured aluminum and theoretical predictions.

    The combined work of two Rice labs has addressed each of those hurdles in their new publications.

    The research by Rice scientists Naomi Halas and Peter Nordlander demonstrates that the color of aluminum nanoparticles depends not only on the size and shape Cheap Devan Dubnyk Jersey , but also critically on the oxide content. They have shown that the color of an aluminum nanoparticle provides direct evidence of the amount of oxidation of the aluminum material itself.

    The labs also characterized the weakening effect of naturally occurring but self-passivating oxidation on aluminum surfaces. " For iron, rust goes right through," Nordlander said. "But for pure aluminum, the oxide is so hard and impermeable that once you form a three-nanometer sheet of oxide, the process stops." To prove it Cheap Kyle Quincey Jersey , the researchers left their disks exposed to the open air for three weeks before testing again and found their response unchanged.

    "The reason we use gold and silver in nanoscience is that they don't oxidize. But finally, with aluminum, nature has given us something we can exploit," Nordlander said. "In addition to being a cheap and tunable material, aluminum exhibits quantum mechanical effects at larger Cheap Daniel Winnik Jersey , more accessible and more precise ranges than gold or silver."

    The new findings appeared in the American Chemical Society (ACS) journal ACS Nano.

    North Korea objected on Saturday to a ban on imports of equipment for a luxury ski resort, indicating toughened U.N. sanctions are impacting the state.

    Under the leadership of North Korean leader Kim Jong-un, who studied in the Swiss capital Berne and is believed to have enjoyed skiing in the Alps, the North has carried out work on the "Masik Pass" ski project since last year, in rivalry with South Korea which is hosting 2018 Winter Olympics.

    Last week Cheap Matt Dumba Jersey , Switzerland halted the sale to the North of equipment for a ski resort and luxury sporting goods including golf, horseback riding and water sports under the sanctions.

    North Korea reportedly asked several Swiss companies to provide chair lifts and cable cars worth the equivalent of $7.24 million for its grand Masik resort.

    North Korea's Skiers Association said in a statement carried by KCNA news agency on Saturday that countries should not prohibit Pyongyang from buying equipment which does not produce any rocket or nuclear weapon.

    "Some countries, pressurized by the U.S. high-handed practices, are blocking the DPRK from importing even equipment to be installed in mass sports facilities such as the ski resort," an association spokesman said. North Korea's official name is the Democratic People's Republic of Korea (DPRK).

    Although the statement did not elaborate on which country blocked the import Cheap Ryan Suter Jersey , it called such a move unjustifiable and a violation of the UN Charter that states sanctions should not affect people in relevant countries.

    Earlier this year, North Korea threatened nuclear and missile strikes against the United States and South Korea at the height of tensions after it was hit with UN sanctions for its February nuclear test.


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