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Title: Nanoscale thermal transport. II. 2003–2012

A diverse spectrum of technology drivers such as improved thermal barriers, higher efficiency thermoelectric energy conversion, phase-change memory, heat-assisted magnetic recording, thermal management of nanoscale electronics, and nanoparticles for thermal medical therapies are motivating studies of the applied physics of thermal transport at the nanoscale. This review emphasizes developments in experiment, theory, and computation in the past ten years and summarizes the present status of the field. Interfaces become increasingly important on small length scales. Research during the past decade has extended studies of interfaces between simple metals and inorganic crystals to interfaces with molecular materials and liquids with systematic control of interface chemistry and physics. At separations on the order of ∼1 nm, the science of radiative transport through nanoscale gaps overlaps with thermal conduction by the coupling of electronic and vibrational excitations across weakly bonded or rough interfaces between materials. Major advances in the physics of phonons include first principles calculation of the phonon lifetimes of simple crystals and application of the predicted scattering rates in parameter-free calculations of the thermal conductivity. Progress in the control of thermal transport at the nanoscale is critical to continued advances in the density of information that can be stored in phase changemore » memory devices and new generations of magnetic storage that will use highly localized heat sources to reduce the coercivity of magnetic media. Ultralow thermal conductivity—thermal conductivity below the conventionally predicted minimum thermal conductivity—has been observed in nanolaminates and disordered crystals with strong anisotropy. Advances in metrology by time-domain thermoreflectance have made measurements of the thermal conductivity of a thin layer with micron-scale spatial resolution relatively routine. Scanning thermal microscopy and thermal analysis using proximal probes has achieved spatial resolution of 10 nm, temperature precision of 50 mK, sensitivity to heat flows of 10 pW, and the capability for thermal analysis of sub-femtogram samples.« less
Authors:
;  [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11] ;  [12] ;  [13]
  1. Department of Materials Science and Engineering and the Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)
  2. Department of Mechanical Engineering, MIT, Cambridge, Massachusetts 02139 (United States)
  3. School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States)
  4. Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States)
  5. Department of Mechanical Engineering, Stanford University, Stanford, California 94305 (United States)
  6. Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States)
  7. Department of Mechanical Sciences and Engineering, University of Illinois, Urbana, Illinois 61801 (United States)
  8. Department of Physics, Penn State University, University Park, Pennsylvania 16802 (United States)
  9. Department of Mechanical Engineering, University of California, Berkeley, California 94720 (United States)
  10. Department of Physics, Brown University, Providence, Rhode Island 02912 (United States)
  11. Department of Materials Science and Engineering, University of Florida, Gainseville, Florida 32611 (United States)
  12. Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801 (United States)
  13. Department of Mechanical Engineering, University of Texas, Autin, Texas 78712 (United States)
Publication Date:
OSTI Identifier:
22269571
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Reviews; Journal Volume: 1; Journal Issue: 1; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 77 NANOSCIENCE AND NANOTECHNOLOGY; CALCULATION METHODS; CONTROL; CRYSTALS; DENSITY; EFFICIENCY; ENERGY CONVERSION; LIQUIDS; MEMORY DEVICES; NANOSTRUCTURES; SCATTERING; SENSITIVITY; SPATIAL RESOLUTION; SPECTRA; THERMAL ANALYSIS; THERMAL CONDUCTION; THERMAL CONDUCTIVITY; THIN FILMS