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Igor Levin

Leader, Materials Structure and Data Group

Research Interests

  • Determination of local structure in inorganic materials using combined input from x-ray/neutron diffraction, electron microscopy imaging, and spectroscopic techniques;
  • Determination of crystal structures, phase transitions, and structure-property relations in bulk and thin film electronic ceramics;
  • Characterization of nanoscale structural and compositional heterogeneities in inorganic materials using high-resolution transmission electron mcroscopy and electron energy loss spectroscopy

Postdoctoral Research opportunities

Emerging electronic oxides (e.g. dielectrics, ferroelectrics, ionic conductors) frequently exhibit local atomic arrangements that are significantly different from those described by the average atomic positions as inferred from traditional crystallographic methods. The research includes experimental measurements on industrially-pertinent materials using a range of advanced techniques (transmission electron microscopy, x-ray and neutron diffraction, x-ray absorption fine structure, and Raman spectroscopy) and development of data analysis approaches and computer software for simultaneous structural refinements using multiple types of data

Accurate knowledge of atomic arrangements and internal substructure in nanomaterials is a key to understanding their properties. The project seeks to address this measurement problem by integrating theoretical analyses and several critical experimental techniques including total x ray and neutron scattering for extracting atomic pair distribution functions, small-angle scattering, and extended absorption fine structure measurements. NIST's Materials Measurement Science Division has access to state-of-the-art synchrotron and neutron radiation facilities for these measurements.

 

Awards

Awards and Honors

  • Bronze Medal, U.S. Department of Commerce, 2013
  • The Spriggs Phase Equilibria Award, American Ceramic Society, 2006
  • Minerva Fellowship, Max-Planck Institut, 1995

Publications

Ba8Cu16As30: A cationic-framework clathrate-I arsenide

Author(s)
Kaya Wei, Artem R. Khabibullin, Dean Hobbis, Winnie K. Wong-Ng, Tieyan Chang, SuYin G. Wang, Igor Levin, Yu-Sheng Chen, Lilia M. Woods, George S. Nolas
Single crystals of clathrate-I Ba8Cu16As30 have been synthesized, and their structure and electronic properties deter-mined using synchrotron-based X-ray

Crystallographic Studies of Ba12Nb8-xTaxCo4O36 (x=1,3,4,5,7)

Author(s)
Winnie K. Wong-Ng, Guangyao Liu, Igor Levin, Izaak Williamson, James A. Kaduk, Lan Li, Andres C. Hernandez
Crystal structures and X-ray reference powder diffraction patterns have been determined for the Ba12Nb8-xTaxCo4O36 (x = 1, 3, 4, 5, 7) series. Ba12Nb8

Comparison of CBED and ABF Atomic Imaging for GaN Polarity Determination

Author(s)
Alexana Roshko, Matthew D. Brubaker, Paul T. Blanchard, Kristine A. Bertness, Todd E. Harvey, Igor Levin, R.H. Geiss
A comparison of two electron microscopy techniques used to determine the polarity of GaN nanowires is presented. The techniques are convergent beam electron
Created August 20, 2019