Our group uses tools from engineering mechanics, statistical physics, and computational chemistry to investigate the molecular mechanisms governing the remarkable and complex behavior of nanostructured materials.
We are interested in understanding the roles of disorder, heterogeneity, and hierarchical organization on the mechanical and transport properties, as well as aging behavior, of nanoporous materials for energy and infrastructure applications.
Our ultimate aim is to address persistent engineering challenges ranging from access to clean water to sustainable infrastructure through the design of new material architectures that harness nanoscale phenomena.
Google Scholar Profile:
V.V. Welborn, L. Ruiz Pestana, T. Head-Gordon
Nature Catalysis, 1, 649-655
L. Ruiz Pestana, O. Marsalek, T.E. Markland, T. Head-Gordon
The journal of physical chemistry letters, 9 (17), 5009-5016
K. Schaettle, L. Ruiz Pestana, T. Head-Gordon, L.N. Lammers
The Journal of chemical physics, 148 (22), 222809
L. Ruiz Pestana, L.E. Felberg, T. Head-Gordon
ACS Nano, 12 (1), 448-454
L. Ruiz Pestana, N. Minnetian, L.N. Lammers, T. Head-Gordon
Chemical science, 9 (6), 1640-1646
Z. Meng, R.A. Soler-Crespo, W. Xia, W. Gao, L. Ruiz Pestana, H.D. Espinosa, S. Keten
Carbon, 117, 476-487
L. Ruiz Pestana, N. Mardirossian, M. Head-Gordon, T. Head-Gordon
Chemical Science, 8 (5), 3554-3565
L. Ruiz Pestana, K. Kolluri, T. Head-Gordon, L.N. Lammers
Environmental Science & Technology, 51 (1), 393-400
N. Mardirossian, L. Ruiz Pestana, J.C. Womack, C.K. Skylaris, T. Head-Gordon, M. Head-Gordon
The journal of physical chemistry letters, 8 (1), 35-40
X. Wei, Z. Meng, L. Ruiz Pestana, W. Xia, C.Lee, J.W. Kysar, J.C. Hone, S. Keten, H.D. Espinosa
ACS Nano, 10 (2), 1820-1828
W. Xia, L. Ruiz Pestana, N.M. Pugno, S Keten
Nanoscale, 8 (12), 6456-6462
L. Ruiz Pestana, A. Benjamin, M. Sullivan, S. Keten
The journal of physical chemistry letters, 6 (9), 1514-1520
L. Ruiz Pestana, W. Xia, Z. Meng, S. Keten
Carbon, 82, 103-115
L. Ruiz Pestana, Y. Wu, S. Keten
Nanoscale, 7 (1), 121-132
L. Ruiz Pestana, S. Keten
The journal of physical chemistry letters, 5 (11), 2021-2026
L. Ruiz Pestana, S. Keten
Soft Matter, 10 (6), 851-861
R. Sinko, S. Mishra, L. Ruiz Pestana, N. Brandis, S. Keten
ACS Macro Letters, 3 (1), 64-69
L. Ruiz Pestana, P. VonAchen, T.D. Lazzara, T. Xu, S. Keten
Nanotechnology, 24 (19), 195103
R. Hourani, C. Zhang, R. Van Der Weegen, L. Ruiz Pestana, C. Li, S. Keten, B.A. Helms, T. Xu
Journal of the American Chemical Society, 133 (39), 15296-15299
Mechano-chemical coupling in nanoporous networks
Nanoporous engineering materials ranging from battery electrodes to concrete are subjected during service to a variety of stress-inducing reactions. The mechanical forces generated by these chemical reactions occurring at nanointerfaces change the structure and interconnectivity of the nanoporous network, which in turn affect the pathways, kinetics, and rates of the reactions taking place. This feedback between chemistry and mechanics leads to complex non-linear evolution whose understanding is critical to improving the performance of these materials.
Our research focuses on elucidating how the network architecture and the properties of the constituent materials can be tailored to control mechano-chemical coupling, and therefore the emerging response of the nanoporous material. Our ultimate aim is to enable transformative breakthroughs in the development of zero-expansion electrodes for ultra-long-lived batteries, or concrete resistant to deleterious expansive reactions.
Aging of disordered nanoporous structural materials
Understanding the multiscale mechanisms of aging in concrete is critical for developing sustainable and resilient infrastructure with improved life expectancy. The degradation of its mechanical properties and loss of performance over time results, at a fundamental level, from aqueous chemical reactions that lead to variations in nanointerfacial hydration and changes in the surface chemistry and morphology of the nanopores. These nanoscale aging mechanisms are in turn regulated by the flow characteristics and mechanical behavior of mesoscale regions of the evolving nanoporous network.
Our research focuses on characterizing the main pathways and kinetics of deleterious nanointerfacial reactions under realistic non-equilibrium service conditions. Then, incorporating that microscopic information in reduced-order models that allow studying the microstructural evolution and chemical kinetics of realistic morphologies at length and time scales relevant to infrastructure systems.
LUIS ALBERTO RUIZ PESTANA
Assistant Professor (starting 2019)
Civil, Architectural, and Environmental Engineering
University of Miami
Postdoctoral Fellow (2015-present)
Chemical Sciences Division, Lawrence Berkeley National Laboratory
Pitzer Center for Theoretical Chemistry, University of California Berkeley
Adv: Teresa Head-Gordon
Theoretical and Applied Mechanics, Northwestern University
Adv: Sinan Keten
Ingeniero de Caminos, Canales, y Puertos (2009)
Universidad de Cantabria, Santander, Spain
WE ARE HIRING!
Several fully funded Ph.D. positions are available at the CompNano Lab. We are looking for highly motivated students passionate about understanding the fundamental molecular mechanisms that govern the performance of advanced infrastructure and energy materials. Enthusiastic, hard-working students with any academic background are encouraged to apply. Experience in scientific computing, molecular simulation, or computational mechanics is a plus but not required. Full financial support for tuition and stipend will be provided.
For more information about admissions requirements for the College of Engineering at the University of Miami: