Research Interests

• Polymer solar cells and electronics
• Radiative Nocturnal cooling/Dew harvesting
• Solidification of metals (additive manufacturing)
• Tomography and reconstruction methods
• Transmission Electron Microscopy and material characterization

Ph.D., Chemical Engineering, University of California at Davis, 2013

M.Sc., Chemical Engineering, University of California at Davis, 2010

B.S., Chemical Engineering, University of Washington, 2006

1. Selected publications Mariana Desireé Reale-Batista, Alyssa L.Troksa, Hannah V. Eshelman, Michael Bagge-Hansen, and John D. Roehling. "All-day passive radiative cooling using common salts." Materials Horizons 10 (2023): 5694. John D. Roehling, Saad A. Khairallah, Yiyu Shen, Andrew Bayramian, Charles D. Boley, Alexander M. Rubenchik, James DeMuth, Ning Duanmu, and Manyalibo J. Matthews. "Physics of large-area pulsed laser powder bed fusion." Additive Manufacturing 46 (2021): 102186. Montgomery, Eric, Darrin Leonhardt, and John D. Roehling. "Ultrafast Transmission Electron Microscopy: Techniques and Applications." Microscopy Today 29, no. 5 (2021): 46-54. Berry, Joel, Aurélien Perron, Jean-Luc Fattebert, John D. Roehling, Bey Vrancken, Tien T. Roehling, Debra L. Rosas et al. "Toward multiscale simulations of tailored microstructure formation in metal additive manufacturing." Materials Today 51 (2021): 65-86. Thejaswi Tumkur-Umanath, Thomas G. Voisin, Rongpei Shi, Phillip J. Depond,Tien T. Roehling, Sheldon Wu, Michael Crumb, John D. Roehling,Gabriel M. Guss, Saad A. Khairallah and Manyalibo J. Matthews,  "Nondiffractive beam shaping for enhanced optothermal control in metal additive manufacturing." Science Advances 7, no. 38 (2021): eabg9358. Tien T. Roehling, Rongpei Shi, Saad A. Khairallah, John D. Roehling, Gabe M. Guss, Joseph T. McKeown, and Manyalibo J. Matthews. "Controlling grain nucleation and morphology by laser beam shaping in metal additive manufacturing." Materials & Design 195 (2020): 109071 John D. Roehling, William L. Smith, Tien T. Roehling, Bey Vrancken, Gabriel M. Guss, Joseph T. McKeown, Michael R. Hill, and Manyalibo J. Matthews. "Reducing residual stress by selective large-area diode surface heating during laser powder bed fusion additive manufacturing." Additive Manufacturing 28 (2019): 228-235. John D. Roehling, Aurélien Perron, Jean-Luc Fattebert, Tomorr Haxhimali, Gabe Guss, Tian T. Li, David Bober et al. "Rapid solidification in bulk Ti-Nb alloys by single-track laser melting." JOM 70 (2018): 1589-1597. Tien T. Roehling, Sheldon SQ Wu, Saad A. Khairallah, John D. Roehling, S. Stefan Soezeri, Michael F. Crumb, and Manyalibo J. Matthews. "Modulating laser intensity profile ellipticity for microstructural control during metal additive manufacturing." Acta Materialia 128 (2017): 197-206. John D. Roehling, Daniel R. Coughlin, John W. Gibbs, J. Kevin Baldwin, James CE Mertens, Geoffrey H. Campbell, Amy J. Clarke, and Joseph T. McKeown. "Rapid solidification growth mode transitions in Al-Si alloys by dynamic transmission electron microscopy." Acta Materialia 131 (2017): 22-30. Aurelien Perron,  John D. Roehling, Patrice EA Turchi, Jean-Luc Fattebert, and Joseph T. McKeown. "Matching time and spatial scales of rapid solidification: dynamic TEM experiments coupled to CALPHAD-informed phase-field simulations." Modelling and Simulation in Materials Science and Engineering 26, no. 1 (2017): 014002. Joseph .T. McKeown, Zweiacker, Kai., Liu, Can., Coughlin, Daniel.R., Clarke, Amy.J., Baldwin, J. Kevin., Gibbs, John.W., Roehling, John .D., Imhoff, Seth.D., Gibbs, Paul.J. and Tourret, Damien."Time-resolved in situ measurements during rapid alloy solidification: Experimental insight for additive manufacturing." JOM 68 (2016): 985-999.