Colloquia and Events

 

WEEKLY COLLOQUIUM

Thursday, March 27, 2025

3:05 - 4:20 PM

Zoom: https://calstatela.zoom.us/j/89128805666  

In-Person Viewing: Biological Sciences, Room 334

 

Perfluoroalkane Cross-sections: Insights from Density Functional Theory

Muhammad Osama Ishtiak

University of Toronto

Perfluoroalkanes are potent greenhouse gases with long-term global warming impacts, which can be quantified using infrared absorption cross-section measurements. While measuring the cross-sections for the heavy perfluoroalkanes, we found that our perfluoro-n-pentane cross-sections differed significantly from those available on the high-resolution transmission molecular absorption (HITRAN) database. We investigated this discrepancy using theoretical cross-sections from density functional theory (DFT). This talk will cover the basics of DFT, and calibration of the theoretical cross-section to best match experimental results. We will discuss the DFT results for all conformers of perfluoro-n-pentane, and consider the cause of the discrepancy between our and the HITRAN cross-sections. 

 

Spring 2025 Department of Physics and Astronomy Colloquium Schedule

(This schedule will be updated throughout the semester.)

  • Thursday, February 6: Dr. Jose Rodriguez, CSULA, "Cooperative Order from Flat Electron Bands in Twisted Bi-Layer Graphene"
  • Thursday, February 13:
  • Thursday, February 20: Dr. Emilie Royer, CSULA, "The Night Sky’s Hidden Light: Airglow as a Window into Solar System Atmospheric Dynamics"
  • Thursday, February 27: Dr. Keeyoon Sung, JPL/Caltech, "High-Precision Molecular Spectroscopy in Support of NASA Space Missions and Instrument Design"
  • Thursday, March 6: Dr. David Van Buren, JPL/Caltech, "Phenomenology of the Future in Spacetime"
  • Thursday, March 13: Dr. Catherine Spurin, Stanford University, "Research needs in porous media for geological storage" 
  • Thursday, March 20: No Colloquium
  • Thursday, March 27: Muhammad Osama Ishtiak, University of Toronto, "Perfluoroalkane Cross-sections: Insights from Density Functional Theory"
  • Thursday, April 3: Spring Break, No Colloquium
  • Thursday, April 10:
  • Thursday, April 17:
  • Thursday, April 24:
  • Thursday, May 1:

  • Thursday, May 8:

    End of Spring 2025 Semester