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Dr. Gheorghe Stan

Research Interests

  • Develop and customize instrumentation for atomic force microscopy to enable advanced and reliable nanoscale property characterization, with direct applications in nanoelectronics, micro- and nano-electromechanical systems, and biotechnology.
  • Atomic force microscopy based characterization of the structure-mechanical property relationship at the nanoscale. Interrogate the size-dependence of the elastic moduli of structures of reduced dimensionality: zero-dimensional nanostructures (nanoparticles), one-dimensional nanostructures (nanowires, nanotubes, nanobelts etc.), and two-dimensional nanostructures (sheets and membranes).
  • Develop contact resonance atomic force microscopy (CR-AFM) for nanoscale elastic modulus measurements: point-measurements and mapping. Assess the suitability of CR-AFM in performing quantitative measurements on materials with elastic moduli in the range of GPa to hundreds of GPa.

Figure 1(left): Measurements of the normal and tangential elastic moduli of nanowires; Figure 2 (center): Contact resonance atomic force microscopy mapping on granular Au films; Figure 3 (right): Probing the elastic modulus on the inner part of AlN nanotubes.

Awards and Honors

  • 2009 MSEL Distinguished Associate Award
  • American Physical Society, Materials Research Society (memberships)


Physicist, NIST Associate
Materials Measurement Science Division
Nanomechanical Properties Group

Employment History:

2005-present: NIST Associate, Ceramics Division, NIST


Ph.D., Physics, Colorado State University, 2005
Ph.D., Physics, University of Bucharest, 2000
M.S., Physics, University of Bucharest, 1996
B.S., Physics, University of Bucharest, 1995


Phone: 301-975-3675
Fax: 301-975-5334