Carnegie Mellon University

Gregory S. Rohrer

Gregory S. Rohrer

W.W. Mullins Professor and Department Head of Materials Science and Engineering

Department of Materials Science and Engineering
Carnegie Mellon University
5000 Forbes Avenue
Pittsburgh, PA 15213-3890


Gregory S. Rohrer is the W.W. Mullins Professor of Materials Science and Engineering, the Head of the Materials Science and Engineering Department, and former Director of the NSF sponsored Materials Research Science and Engineering Center at Carnegie Mellon University. He received his bachelor's degree in Physics from Franklin and Marshall College in 1984 and his Ph.D. in Materials Science and Engineering from the University of Pennsylvania in 1989. He is the author of over 240 publications and has received the following awards: National Science Foundation Young Investigator Award (1994), Roland B. Snow Award of the American Ceramic Society (1998), Ross Coffin Purdy Award of the American Ceramic Society (2002), Fellow of the American Ceramic Society (2003), the Richard M. Fulrath Award of the American Ceramic Society (2004), the Robert B. Sosman Award of the American Ceramic Society (2009), a Sapphire Prize from the Journal of Materials Science (2011), and the W. David Kingery Award of the American Ceramic Society (2014). Rohrer gave the Lawley lecture at Drexel University in 2005, the Winchell Lecture at Purdue University in 2007, and the GE Distinguished Lecture for MS&E at Rensselaer Polytechnic Institute in 2009. Rohrer is an Associate Editor of the Journal of the American Ceramic Society, was the chair of the Basic Science Division of the American Ceramic Society in 2005, and chaired the University Materials Council in 2011.


Ph.D., University of Pennsylvania


The properties of surfaces and grain boundaries are influenced by their geometric and crystallographic structure, their stoichiometry, and their defect structure. Professor Rohrer’s research is aimed at the quantitative study of interfacial properties with the goal of defining structure-property relationships for interfaces. Current research in the area of polycrystalline structure has the goals of quantifying the population of different grain boundary types, measuring their properties, understanding the mechanism by which the network forms during processing, and understanding the influence that the network structure has on the macroscopic properties of the material. Current research in the area of metal oxide surfaces has the long range goal of developing composite polar oxide materials that make the photolytic production of hydrogen economically feasible.


(Selected Publications)

F. Ram, J.T. Lloyd, and G.S. Rohrer, "Habit planes of twins in a deformed Mg alloy determined from three-dimensional microstructure analysis," Materials Characterization, 102 (2020) 110014.

A.S. Pisat, P.A. Salvador, and G.S. Rohrer, "The Facet Structure and Photochemical Reactivity of Arbitrarily Oriented Strontium Titanate Surfaces," Advanced Materials Interfaces, 6 (2019) 1900731.

X. Zhong, M.N. Kelly, H.M. Miller, S.J. Dillon, G.S. Rohrer, "Grain Boundary Curvatures in Polycrystalline SrTiO3: Dependence on Grain Size, Topology, and Crystallography," Journal of the American Ceramic Society, 102 (2019) 7003-7014.

A. Bhattacharya, Y.-F. Shen, C.M. Hefferan, S.F. Li, J. Lind, R.M. Suter, G.S. Rohrer, "Three-dimensional observations of grain volume changes during annealing of polycrystalline Ni," Acta Materialia, 167 (2019) 40-50

Y.-F. Shen, X. Zhong, H. Liu, R.M. Suter, A. Morawiec, G.S. Rohrer, "Determining Grain Boundary Energies from Triple Junction Geometries without Discretizing the Five-Parameter Space," Acta Materialia, 166 (2019) 126-134.

W. Song, P.A. Salvador, G.S. Rohrer, "Influence of the Magnitude of Ferroelectric Domain Polarization on the Photochemical Reactivity of BaTiO3," ACS applied materials & interfaces, 10 (2018) 41450-41457 (2018).

Rohrer's publications using Google Scholar

Rohrer's publications using Thomson Reuters ResearcherID