News & EventsDepartment Events
Events
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Apr1
EVENT DETAILS
TBA
TIME Monday, April 1, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr3
EVENT DETAILS
TBA
TIME Wednesday, April 3, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr5
EVENT DETAILS
TBA
TIME Friday, April 5, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr8
EVENT DETAILS
TBA
TIME Monday, April 8, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr10
EVENT DETAILS
TBA
TIME Wednesday, April 10, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr12
EVENT DETAILS
TBA
TIME Friday, April 12, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr15
EVENT DETAILS
TBA
TIME Monday, April 15, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr17
EVENT DETAILS
TBA
TIME Wednesday, April 17, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr19
EVENT DETAILS
TBA
TIME Friday, April 19, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr22
EVENT DETAILS
TBA
TIME Monday, April 22, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr24
EVENT DETAILS
Abstract: Current understanding of using energy releases for both fields of experimental damage mechanics or induced seismicity primarily focuses on parametric analysis, e.g., individual traits of energy releases such as magnitude and rate of release. But the extensive information embedded in the organizational patterns of energy releases has hardly been explored. Here we study the specific organizational signatures that they possess. A key theme to this work is to show that energy release organizational signatures (topology) are physically connected to fundamental mechanisms of fracture and slip—but demands a perspective shift to an interdisciplinary approach that combines mechanics and data science. We move from understanding energy releases in time only, to connecting them in space-time-magnitude-mechanism and understanding the shape of these multi-dimensional networks as tree structures and their evolution. This presentation will demonstrate the analyses that extend single scale acoustic emission (AE) data into multi-scale connected networks that can inform our understanding of stress evolution.
Bio: Jesse Hampton is an Assistant Professor in Civil and Geological Engineering (Department of Civil and Environmental Engineering) at the University of Wisconsin-Madison. At the intersection of humanity, Earth systems, and the infrastructure needed for travel and power generation, there exists an interdisciplinary field where civil engineering, geological engineering, sustainability, geophysics, and data science are inextricably linked. At this intersection, Dr. Hampton's research focuses on a few cross-cutting themes including multiscale damage (e.g., from microcracks to earthquakes), nondestructive evaluation (NDE) techniques (e.g., from acoustic emissions (AEs) to distributed fiber optic sensing), and artificial intelligence (e.g., from optimization to deep learning). The goal of Dr. Hampton's research is to predict and mitigate damage in Earth and Civil Engineering systems from the micro- to field-scales to enhance infrastructure sustainability. Prior to joining the UW-Madison faculty, Dr. Hampton worked in geomechanics and geophysics research for both Halliburton and New England Research. He obtained his PhD in 2015 from Colorado School of Mines. Google Scholar: https://scholar.google.com/citations?user=mbTGfxsAAAAJ&hl=en. Research Group Website:https://geod.wisc.edu/
TIME Wednesday, April 24, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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Apr26
EVENT DETAILS
TBA
TIME Friday, April 26, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May1
EVENT DETAILS
TBA
TIME Wednesday, May 1, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May3
EVENT DETAILS
TBA
TIME Friday, May 3, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May6
EVENT DETAILS
TBA
TIME Monday, May 6, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May8
EVENT DETAILS
TBA
TIME Wednesday, May 8, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May10
EVENT DETAILS
TBA
TIME Friday, May 10, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May13
EVENT DETAILS
TBA
TIME Monday, May 13, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May15
EVENT DETAILS
Abstract: Grain boundaries have a central importance for functional properties of materials. They can critically control thermal and elactrical transport, determining the performance of energy and electronic materials. In thermoelectric materials – promising for refrigerant-free cooling and waste heat energy harvesting – grain boundaries can be leveraged to suppress the thermal conductivity, but can also detrimentally suppress the carrier mobility. Grain boundaries are not all equal: they are associated to several degrees of freedom, and can come in multiple orientations, symmetries, and chemistries. Recent evidence suggests that some types of grain boundaries could be more beneficial than others for the thermoelectric performance. Despite the importance, we lack a clear understanding of how grain boundaries modify the microscale transport owing to the scarcity of local investigations. Usually the role of grain boundaries is inferred from bulk, effective measurements. However, understanding how grain boundaries impact transport locally is a crucial perspective to enable grain-boundary engineering for the next generation of high-performance thermoelectrics.
In this seminar, I will introduce our recent work on thermal conductivity imaging of grain boundaries via spatially-resolved frequency-domain thermoreflectance. Measurements with microscale resolution reveal a suppression in thermal conductivity at grain boundaries both in thermoelectric SnTe and photovoltaic multicrystalline silicon. In contrast to conventional thermal modeling, which assumes that all boundaries are perfect scatterers and lead to uniformly suppressed thermal conductivity, we observe a non-uniform suppression localized within a few microns of a boundary. Furthermore, not all grain boundaries behave the same: misorientation angle, symmetry, as well as interface roughness and morphology are found to strongly correlate with the effective thermal boundary resistance. Extracting transport properties from microscale imaging can provide comprehensive understanding of how individual microstructural components work. In particular, it can advance the study of grain boundary phases - i.e. two-dimensional phases stabilized at the boundary and that can be controlled via thermodynamics - by correlating how thier local chemistry and structure impact functional properties. This development can improve our understanding of carrier-defect interactions, enabling the rational engineering of interfaces and materials microstructures for superior performance in energy and electronics.
Bio: Eleonora Isotta is currently a Postdoctoral scholar in the Department of Materials Science and Engineering at Northwestern University. She joined in fall 2022 and has been working on thermal transport in semiconductors, developing methods to perform thermal imaging of defects, with a focus on grain boundaries, together with Prof. G. J. Snyder and Prof. O. Balogun. She received her B.S. in Environmental Engineering in 2015 and M.S. in Energy Engineering in 2017 from University of Trento. In 2021, she received a Ph.D. in Materials Science from University of Trento, with a dissertation on the interplay between crystal structure and transport properties in thermoelectric materials. She then pursued a Postdoc at Michigan State University working on thermal transport and elasticity in thermoelectric materials. Her current research interests involve thermal transport, microstructure engineering, and materials for thermoelectrics and electronics.
TIME Wednesday, May 15, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May17
EVENT DETAILS
TBA
TIME Friday, May 17, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May20
EVENT DETAILS
TBA
TIME Monday, May 20, 2024 at 11:00 AM - 12:00 PM
LOCATION 1101, Pancoe-NSUHS Life Sciences Pavilion map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May22
EVENT DETAILS
TBA
TIME Wednesday, May 22, 2024 at 11:00 AM - 12:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)
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May24
EVENT DETAILS
TBA
TIME Friday, May 24, 2024 at 2:00 PM - 3:00 PM
LOCATION A236, Technological Institute map it
CONTACT Andrew Liguori andrew.liguori@northwestern.edu EMAIL
CALENDAR McCormick - Civil and Environmental Engineering (CEE)