Postdoctoral Researcher, IDREAM Early Career Network Lead
Postdoctoral Researcher, IDREAM Early Career Network Lead


Emily Nienhuis joined Pacific Northwest National Laboratory (PNNL) in May 2020 and is a postdoctoral researcher in the geochemistry group with interests in characterization of solutions and amorphous materials and their structures leading to crystallization. She is currently lead for the Interfacial Dynamics in Radioactive Environments and Materials (IDREAM) Early Career Network, helping to build the benches of scientists and engineers as they grow their careers.

Before joining PNNL, Emily specialized in structural characterization of glasses and glass-forming liquids through X-ray and neutron total scattering, specifically those made of ionic materials. Since joining PNNL, she has focused on synthesis and characterization of highly concentrated, low-water, alkaline solutions with the goal of understanding how solute–solvent interactions and solution organizational structures affect crystallization propensity, reaction pathways, and resulting products. At PNNL, Emily uses Fourier transform infrared and Raman spectroscopies to understand local solution structures. Emily has also participated in multiple beamtime campaigns at the U.S. Department of Energy’s Advanced Photon Source and Spallation Neutron Source.

Research Interest

  • Aluminosilicate glasses and minerals
  • Salt melts and glasses
  • Concentrated salt solutions with low water
  • In situ characterization of materials under extreme conditions

Disciplines and Skills

  • X-ray total scattering
  • Neutron total scattering
  • Pair distribution function analysis
  • Powder X-ray diffraction
  • Raman spectroscopy

Awards and Recognitions

  • 2019 Roy G. Post Foundation Scholarship Recipient, Waste Management Symposia



  • Graham T.R., M. Dembowski, H. Wang, S.T. Mergelsberg, E.T. Nienhuis-Marcial, J.G. Reynolds, and C.H. Delegard, et al. 2021. "Hydroxide promotes ion pairing in the NaNO2-NaOH-H2O system." Physical Chemistry Chemical Physics 23, no. 1:112-122. PNNL-SA-156222. doi:10.1039/D0CP04799F
  • Young L., E.T. Nienhuis-Marcial, D. Koulentianos, G. Doumy, A.M. March, S.H. Southworth, and S.B. Clark, et al. 2021. "Photon-in/photon-out x-ray free-electron laser studies of radiolysis." Applied Sciences 11, no. 2:Article No. 701. PNNL-SA-158913. doi:10.3390/app11020701