{
  "date" : "2014-12-15",
  "identifier_doecontract" : "",
  "subject" : "36 MATERIALS SCIENCE; CARBON; DIFFUSION; NANOPARTICLES; NANOSTRUCTURES; PARTICLE SIZE; PLATINUM; SCANNING ELECTRON MICROSCOPY; SILVER; SINTERING; SURFACES; TEMPERATURE DEPENDENCE; THERMAL DIFFUSIVITY; TRANSMISSION ELECTRON MICROSCOPY",
  "description" : "Transmission electron microscopy and scanning transmission electron microscopy studies were conducted in situ on 2–5 nm Pt and 10–40 nm Ag nanoparticles to study mechanisms for sintering and to measure relevant sintering kinetics in nanoscale particles. Sintering between two separated particles was observed to initiate by either (1) diffusion of the particles on the sample support or (2) diffusion of atoms or small clusters of atoms to the neck region between the two particles. After particle contact, the rate of sintering was controlled by atomic surface diffusivity. The surface diffusivity was determined as a function of particle size and temperature from experimental measurements of the rate of neck growth of the particles. The surface diffusivities did not show a strong size effect for the range of particle sizes that were studied. The surface diffusivity for Pt nanoparticles exhibited the expected Arrhenius temperature dependence and did not appear to be sensitive to the presence of surface contaminants. In contrast, the surface diffusivity for Ag nanoparticles was affected by the presence of impurities such as carbon. The diffusivities for Ag nanoparticles were consistent with previous measurements of bulk surface diffusivities for Ag in the presence of C, but were significantly slower than those obtained from pristine Ag.",
  "language" : "English",
  "identifier_report" : "",
  "publisher_sponsor" : "",
  "publisher_country" : "United Kingdom",
  "source" : "INIS",
  "purl" : "",
  "title" : "In situ transmission electron microscopy and scanning transmission electron microscopy studies of sintering of Ag and Pt nanoparticles",
  "type" : "Journal Article",
  "subject_related" : "",
  "relation" : "Journal Name: Acta Materialia; Journal Volume: 81; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)",
  "entry_date" : "2016-01-01",
  "subject_list" : [ "36 MATERIALS SCIENCE", "CARBON", "DIFFUSION", "NANOPARTICLES", "NANOSTRUCTURES", "PARTICLE SIZE", "PLATINUM", "SCANNING ELECTRON MICROSCOPY", "SILVER", "SINTERING", "SURFACES", "TEMPERATURE DEPENDENCE", "THERMAL DIFFUSIVITY", "TRANSMISSION ELECTRON MICROSCOPY" ],
  "publisher_availability" : "Available from http://dx.doi.org/10.1016/j.actamat.2014.08.028",
  "rights" : "",
  "announced_date" : "2016-01-01",
  "type_qualifier" : "",
  "has_fulltext" : false,
  "coverage" : "",
  "identifier" : "PII: S1359-6454(14)00629-6",
  "journal_volume" : "81",
  "creator" : "Asoro, M. A. [Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712 (United States)]; Ferreira, P. J. [Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712 (United States)]; Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712 (United States)]; Kovar, D., E-mail: dekovar@austin.utexas.edu [Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712 (United States); Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712 (United States)]",
  "site_ownership_code" : "INIS",
  "osti_id" : "22411421",
  "journal_issue" : "",
  "resource_type" : "JOUR",
  "format" : "Medium: X; Size: page(s) 173-183",
  "journal_name" : [ ],
  "contributing_organizations" : "",
  "citation_location" : "https://www.osti.gov/etdeweb/biblio/22411421",
  "publication_year" : 2014,
  "subject_list_commas" : "36 MATERIALS SCIENCE, CARBON, DIFFUSION, NANOPARTICLES, NANOSTRUCTURES, PARTICLE SIZE, PLATINUM, SCANNING ELECTRON MICROSCOPY, SILVER, SINTERING, SURFACES, TEMPERATURE DEPENDENCE, THERMAL DIFFUSIVITY, TRANSMISSION ELECTRON MICROSCOPY",
  "publisher" : "",
  "identifier_other" : "Journal ID: ISSN 1359-6454; CODEN: ACMAFD; Other: PII: S1359-6454(14)00629-6; TRN: GB15R3541117284",
  "publisher_research" : "",
  "creators_list" : [ "Asoro, M. A. [Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712 (United States)]", "Ferreira, P. J. [Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712 (United States)]", "Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712 (United States)]", "Kovar, D., E-mail: dekovar@austin.utexas.edu [Materials Science and Engineering Program, University of Texas at Austin, Austin, TX 78712 (United States)", "Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712 (United States)]" ],
  "doi" : "https://doi.org/10.1016/J.ACTAMAT.2014.08.028"
}