NCRC-B28 3005E (Faculty Office)
NCRC-B10 G034 Computational Lab (Research Lab)
Assistant Professor, Applied Physics (0% appointment)
Assistant Professor of Chemical Engineering
She / Her / Hers
University of Minnesota, Twin Cities
PhD Chemical Physics, 2016
University of Minnesota, Twin Cities
MS Chemical Physics, University of Minnesota Twin Cities, 2012
Wayne State University
BS Chemical Engineering, 2010
Dr. Lindsey’s group studies chemistry in inherently multiscaled systems and material evolution under extreme and dynamically changing conditions through advanced simulations and machine learning.
Nanomaterial design and discovery: There is tremendous interest in achieving tunable synthesis of nanomaterials due to their utility in fields spanning quantum computing, catalysis, energy, drug delivery, national security, and more. Shock-compression methods are particularly attractive for nanocarbon synthesis since they can produce products extremely rapidly and enable access to exotic allotropes. However, they remain far from tunable due to the limited understanding of the governing phenomena resulting from difficulties of driving materials from ambient to extreme conditions and observing the rapid, reaction-driven, and multiscaled system evolution. To circumvent these challenges, our group develops and applies advanced simulation approaches enabling an otherwise inaccessible atomistically resolved view of ensuing phenomena. Using these methods, we aim to establishing rational design principles and tools for tunable shock-synthesis of next generation nanocarbon materials.
Machine Learning and Data Science: Atomistic simulations can be a powerful tool for generating scientific insights, guiding, and aiding in interpretation of experiments, and generating input for larger scale, lower resolution simulations (e.g., continuum modeling), but they rely on availability of suitable interatomic models. Atomistic simulations have historically struggled to describe chemistry in condensed phase and inherently multiscaled systems (i.e., those central to H-storage system design, sorbent optimization, heterogenous catalysis, etc.), since they necessitate both the accuracy of quantum-mechanics and computational efficiency of relatively simple molecular mechanics models. To bridge this capability gap, our group develops AI-driven simulation tools enabling agile generation of robust machine-learned interatomic models for quantum-accurate reactive simulation on unprecedented scales. Our group also develops machine learning tools to aid in interpretation of large experimental datasets and to develop material diagnostic and performance models from them.
Chemistry under extreme conditions: Chemistry occurring under extreme and dynamically changing conditions has implications for a myriad of applications spanning next-generation material processing techniques (e.g., laser ablation, sonication and electron-beam modification), defense applications (e.g., detonation science), and sustainable energy (e.g., nuclear power). To facilitate advances in these areas, our group employs multiscale simulation approaches probing ensuing dynamics, equation of state, thermochemistry, and microstructural evolution.
University of Michigan
Assistant Professor, 2022 – present
Lawrence Livermore National Laboratory (LLNL)
Staff Research Scientist, 2018 – 2022
Lawrence Livermore National Laboratory
Post-doctoral Associate, 2016 – 2018
Guest Editor: Propellants Explos. Pyrotech.: Special Issue on Machine Learning and Data Science for Energetic Materials, 2022
Conference Technical Committee Member: American Physical Society (APS) Shock Compression of Condensed Matter Topical Group (SCCM) Biannual Meeting, 2022
Advisory board member: Institute of Computational Science & Engineering, 2022 – Present
Elected Member-at-Large: APS SCCM Topical Group, 2022 – Present
LLNL Materials Science Division AI, ML, and Data Science Committee (Surrogate modeling and Data Management co-lead), 2021 – 2022
Co-director: LLNL Computational Chemistry & Materials Science, Summer Institute (CCMS) 2021 – 2022
Committee Member: LLNL CCMS, 2019 – 2020
Liaison to the Director: American Institute of Chemical Engineers (AIChE) Computational Molecular Science & Engineering Forum, 2019 – 2021
UMN Chemistry Department Diversity Committee, 2015 – 2016
Officer: UMN Association of Multicultural Scientists, 2010 – 2016
LLNL Physical and Life Sciences Directorate Research Award, 2019
Springer Poster Prize; Foundations of Molecular Modeling and Simulations Mtg., 2018
Colloids Division Poster Prize; American Chemical Society (ACS) National Mtg., 2016
J. Mater. Chem. Poster Prize; Foundations of Molecular Modeling & Simulations Mtg., 2015
National Science Foundation Pan-American Advanced Studies Institute Award, 2012
Student Poster Prize; AIChE National Mtg., 2009
WSU Ernest B. Drake Leadership Scholarship, 2009
WSU Honors College Research Grant, 2009
WSU Honors College Research Grant, 2008
R.K. Lindsey*, C.H. Pham, N. Goldman, S. Bastea, L.E. Fried, “Machine-Learning a Solution for Reactive Atomistic Simulations of Energetic Materials”, Invite-only Special Issue: Molecular Dynamics in Energetic Materials Research, Propellants Explos. Pyrotech., e202200001 (2022).
C.H. Pham*, R.K. Lindsey, L.E. Fried, N. Goldman, “High-Accuracy Semiempirical Quantum Models Based on a Minimal Training Set”, J. Phys. Chem. Lett., 13, 2934 (2022).
R.K. Lindsey*, N. Goldman, L.E. Fried, S. Bastea, “Chemistry-Mediated Ostwald Ripening in Carbon-Rich C/O systems at Extreme Conditions”, Nat. Commun., 13, 1424 (2022).
R.K. Lindsey*, S. Bastea, N. Goldman, L.E. Fried, “Investigating 3,4-bis(3-nitrofurazan-4-yl)furoxan Detonation with a Rapidly Tuned Density Functional Tight Binding Model”, J. Chem. Phys. 154, 164115 (2021).
R.K. Lindsey*, L.E. Fried, N. Goldman, S. Bastea, “Active Learning for Robust, High-Complexity Reactive Atomistic Simulations”, Special issue: Machine Learning Meets Chemical Physics, J. Chem. Phys. 153, 134117 (2020).
M.R. Armstrong*, R.K. Lindsey*, N. Goldman, M.H. Nielsen, E. Stavrou, L.E. Fried, J.M. Zaug, S. Bastea*, “Ultrafast Shock Synthesis of Nanocarbon from a Liquid Precursor”, Nat. Commun. 11, 353 (2020).
R.K. Lindsey*, H. Pham, L.E. Fried, N. Goldman, S. Bastea, “ChIMES: A Machine-Learned Interatomic Model Targeting Improved Description of Condensed Phase Chemistry in Energetic Materials”, Milestone report for project entitled: Machine Learning for High Explosive Reactions, LLNL-TR-814690, (2020).
M.P. Kroonblawd*, R.K. Lindsey, N. Goldman, “Synthesis of Nitrogen-containing Polycyclic Aromatic Hydrocarbons and other Prebiotic Compounds in Impacting Glycine Solutions”, Chem. Sci., 10, 6091-6098 (2019).
R.K. Lindsey, M.P. Kroonblawd, L.E. Fried, N. Goldman*, “Force Matching Approaches to Extend Density Functional Theory to Large Time and Length Scales”, In Computational Approaches for Chemistry Under Extreme Conditions, 71-93, Springer, Cham, (2019).
N. Goldman*, B. Aradi, R.K. Lindsey, and L.E. Fried, “Development of a Multi-center Density Functional Tight Binding Model for Plutonium Surface Hydriding”, J. Chem. Theory Comput., 14, 2652-2660 (2018).
R.K. Lindsey*, L.E. Fried, N. Goldman, “ChIMES: A Force Matched Potential with Explicit Three-Body Interactions for Molten Carbon”, J. Chem. Theory Comput., 13, 6222-6229 (2017).