Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.


The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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.
  • Develop contact resonance atomic force microscopy (CR-AFM) for nanoscale elastic modulus measurements. Assess the suitability of CR-AFM in performing quantitative measurements on materials with elastic moduli in the range of GPa to hundreds of GPa.

Stan Figure 1
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.


  • US Patent # 9,535,085 "Intermittent Contact Resonance Atomic Force Microscopy and Process for Intermittent Contact Resonance Atomic Force Microscopy," Inventors: Stan & Gates (2017)

Google Scholar Citations:


2009 MSEL Distinguished Associate Award


PEGylation of zinc nanoparticles amplifies their ability to enhance olfactory responses to odorant

Melissa Singletary, Samantha Hagerty, Shinichiro Muramoto, Yasmine Daniels, William A. MacCrehan, Gheorghe Stan, June W. Lau, Oleg Pustovyy, Ludmila Globa, Edward E. Morrison, Iryna Sorokulova, Vitaly Vodyanoy
Responses of olfactory sensory neurons to odorants are intensely enhanced with the addition of small endogenous and engineered zinc nanoparticles, as shown by

After oxidation, zinc nanoparticles lose their ability to enhance responses to odorants

Samantha Hagerty, Yasmine C. Daniels, Melissa Singletary, Oleg Pustovyy, Ludmila Globa, William A. MacCrehan, Shinichiro Muramoto, June W. Lau, Edward Morrison, Iryna Sorokulova, Vitaly Vodyanoy, Gheorghe NMN Stan
Electrical responses of olfactory sensory neurons to odorants were examined in the presence of zinc nanoparticles of various sizes and degrees of oxidation. The
Created July 30, 2019, Updated November 14, 2019