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Research Highlight | Center for Nanoscale Materials

A unique probe of thermal transport in perovskites

In a recent study published in Nature Communications, researchers at the Center for Nanoscale Materials shed light on the design of materials that exhibit highly anisotropic thermal dissipation properties.

Scientific Achievement

Probing of thermal transport using coherent acoustic phonons in 2-dimensional perovskite materials – promising semiconductors for next-generation optoelectronics – was developed, and large thermal impedance mismatching effects were characterized.

Significance and Impact

Mechanisms and rates of thermal transport in intimately intermixed, disparate, nanoscopic sublattices remain poorly investigated and can impact optoelectronic properties.

Research Details

  • The Center for Nanoscale Materials capabilities employed were: femtosecond transient reflection measurements, band structure calculations on HPC Carbon, SEM and XRD.
  • Sample synthesis, processing, and structural characterization was performed at Northwestern University.

DOIhttps://​doi​.org/​10​.​1038​/​s​41467​-​018​-​04429-9

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Work was performed in part at the Center for Nanoscale Materials.

Coherent lattice distortions in 2D crystalline perovskites. (top) spectral map of (HA)PbI4 flake. (bottom) crystal structure (upper figures) and bead-spring models (lower figures). Pb–I octahedron (blue), HA2+ ion (purple) and BA+ ions (black).

About Argonne’s Center for Nanoscale Materials
The Center for Nanoscale Materials is one of the five DOE Nanoscale Science Research Centers, premier national user facilities for interdisciplinary research at the nanoscale supported by the DOE Office of Science. Together the NSRCs comprise a suite of complementary facilities that provide researchers with state-of-the-art capabilities to fabricate, process, characterize and model nanoscale materials, and constitute the largest infrastructure investment of the National Nanotechnology Initiative. The NSRCs are located at DOE’s Argonne, Brookhaven, Lawrence Berkeley, Oak Ridge, Sandia and Los Alamos National Laboratories. For more information about the DOE NSRCs, please visit https://​sci​ence​.ener​gy​.gov/​b​e​s​/​s​u​f​/​u​s​e​r​-​f​a​c​i​l​i​t​i​e​s​/​n​a​n​o​s​c​a​l​e​-​s​c​i​e​n​c​e​-​r​e​s​e​a​r​c​h​-​c​e​n​ters/.

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The U.S. Department of Energy’s Office of Science is the single largest supporter of basic research in the physical sciences in the United States and is working to address some of the most pressing challenges of our time. For more information, visit https://​ener​gy​.gov/​s​c​ience.