Mehdi (Nader) Dehghany


Mehdi (Nader) Dehghany

PhD. : Physical Chemistry, Specialized in Optics, Laser and Spectroscopy, U of Calgary, Canada
MSc.: Laser spectroscopy, U of Calgary, Canada
MSc. Atomic and Molecular Physics, Beheshti university, Tehran, Iran
BSc.: Applied Physics, Sharif University of Technology, Tehran, Iran

Office: B233F
Phone: 403.440.8486


Mehdi (Nader) Dehghany obtained PhD in Physical chemistry at the University of Calgary with emphasis on structural determination of gas phase clusters/molecules, using laser spectroscopy techniques. The main focus of his PhD program was constructing a supersonic jet-cooled apparatus to generate high-intensity pulsed molecular beam of van der Waals (vdW) clusters using magnetic valve with slit nozzle, under ultra-high vacuum condition. The optical compartment of this apparatus and computer-controlled data acquisition system was capable of recording high-resolution infrared absorption spectra of vdW molecular clusters (ro-vibrational spectra with FWHM about 0.002 cm-1 at few kelvin). With special focus on binary and ternary van der Waals clusters of Nitrous Oxide (N2O), his PhD focus was extended to carbon dioxide clusters (CO2), up to 13 monomers bonded, as well as Carbonyl sulfide (OCS) clusters. 

He then joined Devon Research Center (Natural Resources Canada) as a post-doctoral fellow. At this research laboratory, the focus was hydrocarbon characterization of oil well samples using various spectroscopic techniques (FTIR, Raman, Phot-Acoustic FTIR, Phot-Acoustic Direct absorption). He also developed a source-compensated Photo-Acoustic spectrometer using CW Quantum Cascade Laser (QCL), resulting in considerable improvement in observation and assignment of vibrational modes of large hydrocarbons compared to conventional FTIR. This technique can be readily expanded to other wavenumber regions.

He has co-authored over 37 peer-reviewed articles in various scientific journals such as the Journal of Chemical Physics (JCP), Physical Chemistry Chemical Physics (PCCP), Molecular physics, the Journal of Physical Chemistry A, Journal of Molecular Spectroscopy, The review of scientific instruments and the Journal of Biomedical Optics.

He has also personal and professional mandate to engage in science education, fostering a positive learning environment in and out of his lectures with a strong appetite for implementing new educational technologies and methods.

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Recent publications:

1) C. Gergess, M. Dehghany, A. K. Michaelian,  A.R.W. McKellar and N. Moazzen-Ahmadi, Observation of two N2O-Ar cluster hotbands - A symmetry breaking of an intramolecular bending mode. (Submitted to J. Molec. Spectrosc. – Oct2021)

2) J. Norooz Oliaee, M. Dehghany, M. Reazei, A.R.W. McKellar and N. Moazzen-Ahmadi,: Five inter-molecular vibrations of the CO2 dimer observed via infrared combination bands, Journal of Chemical Physics 145, 17 (2016).

3) L. Evangelisti, B. H. Pate, M. Dehghany, N. Moazzen-Ahmadi, and A.R.W. McKellar: Theory vs. Experiment for Molecular Clusters: Spectra of OCS Trimers and Tetramers, Journal of Chemical Physics 142, 104309 (2015).

4) M. Dehghany and K.H. Michaelian: Dual-beam Photoacoustic infrared spectroscopy using a quantum cascade laser, The Review of scientific instruments 83(6), 064901 (2012).

5) N. Tabatabaei, A. Mandelis, M. Dehghany, K.H. Michaelian and B.T. Amaechi: On the sensitivity of Thermophotonic Lock-In Imaging and Polarized Raman Spectroscopy to early dental caries diagnosis, Journal of Biomedical Optics 17, 025002 - 025009 (2011).