1 Ocak 2015 Dergi makalesi Açık Erişim

Rodenbough, Philip P.; Song, Junhua; Walker, David; Clark, Simon M.; Kalkan, Bora; Chan, Siu-Wai

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  "@id": 78353, 
  "@type": "ScholarlyArticle", 
  "creator": [
    {
      "@type": "Person", 
      "name": "Rodenbough, Philip P."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Columbia Univ, Dept Appl Phys & Appl Math, Mat Sci & Engn Program, New York, NY 10027 USA", 
      "name": "Song, Junhua"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Columbia Univ, Dept Earth & Environm Sci, Lamont Doherty Earth Observ, Palisades, NY 10964 USA", 
      "name": "Walker, David"
    }, 
    {
      "@type": "Person", 
      "name": "Clark, Simon M."
    }, 
    {
      "@type": "Person", 
      "affiliation": "Hacettepe Univ, Dept Engn Phys, TR-06800 Ankara, Turkey", 
      "name": "Kalkan, Bora"
    }, 
    {
      "@type": "Person", 
      "affiliation": "Columbia Univ, Dept Appl Phys & Appl Math, Mat Sci & Engn Program, New York, NY 10027 USA", 
      "name": "Chan, Siu-Wai"
    }
  ], 
  "datePublished": "2015-01-01", 
  "description": "We report the crystallite-size-dependency of the compressibility of nanoceria under hydrostatic pressure for a wide variety of crystallite diameters and comment on the size-based trends indicating an extremum near 33 nm. Uniform nano-crystals of ceria were synthesized by basic precipitation from cerium (III) nitrate. Size-control was achieved by adjusting mixing time and, for larger particles, a subsequent annealing temperature. The nano-crystals were characterized by transmission electron microscopy and standard ambient x-ray diffraction (XRD). Compressibility, or its reciprocal, bulk modulus, was measured with high-pressure XRD at LBL-ALS, using helium, neon, or argon as the pressure-transmitting medium for all samples. As crystallite size decreased below 100 nm, the bulk modulus first increased, and then decreased, achieving a maximum near a crystallite diameter of 33 nm. We review earlier work and examine several possible explanations for the peaking of bulk modulus at an intermediate crystallite size. (C) 2015 AIP Publishing LLC.", 
  "headline": "Size dependent compressibility of nano-ceria: Minimum near 33 nm", 
  "identifier": 78353, 
  "image": "https://aperta.ulakbim.gov.tr/static/img/logo/aperta_logo_with_icon.svg", 
  "license": "http://www.opendefinition.org/licenses/cc-by", 
  "name": "Size dependent compressibility of nano-ceria: Minimum near 33 nm", 
  "url": "https://aperta.ulakbim.gov.tr/record/78353"
}