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    • REACT@Penn 2020: Global Pathways to enable Innovative Materials Solutions for Urban Challenges

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    Singh Center for Nanotechnology 3205 Walnut Street, Philadelphia, PA, United States

    How can science and technology help cities solve their problems?  Are there common urban air, water and energy challenges for science to tackle? 10:00 am Urban Challenges with (potential) Materials Solutions Model cities of Grenoble, France, Philadelphia, USA and Seoul, Korea 1:30 pm Adoption and Adaptation of New Technologies for Urban Challenges Joshua Sperling, National […]

    MEAM Seminar: “Confined Curved Shells and their Elaborate Conformations”

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    Glandt Forum, Singh Center for Nanotechnology 3205 Walnut Street, Philadelphia, PA, United States

    Curved shells, when confined, can deform to a broad assortment of large scale shapes and smaller scale wrinkling and folding patterns quite unlike what produced by their flat counterparts. The intrinsic, natural curvature of shells is the central element that allows for this rich and very interesting morphological landscape, but it is also the source […]

    MSE Materials in Practice Seminar: “So You’re an Engineer…Now What?”

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    LRSM Reading Room 3231 Walnut St., Philadelphia, PA, United States

    Materials in Practice is a seminar series where technologists who are using materials science to shape the world we live in share their secret to doing this. We hope that anyone who wants to apply the research they are doing to solve real world problems will be able to attend this Seminar Series.

    MSE Grace Hopper Lecture: “Artificial Intelligence for Generating Materials Science Knowledge”

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    Auditorium, LRSM Building 3231 Walnut Street, Philadelphia, PA, United States

    The process of scientific inquiry involves observing a signal (data) and interpreting it to generate information (knowledge). For example, in electron microscopy the signal may be a diffraction pattern from which information on crystal orientation may be deduced by applying diffraction theory. Science advances both through improvements in gathering data and in techniques for extracting […]

    MEAM Seminar: “Plate Mechanical Metamaterials and their Applications”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    Recently, we introduced the concept of plate mechanical metamaterials—cellular plates with carefully controlled periodic geometry and unique mechanical properties—as well as its initial realization in the form of freestanding corrugated plates made out of an ultrathin film. We used atomic layer deposition (ALD) and microfabrication techniques to make robust plates out of a single continuous […]

    CIS Seminar: “Networked Systems in the Era of Programmable Dataplanes”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    Abstract:  Emerging networking architectures are allowing for flexible and reconfigurable packet processing at line rate both on the switch and the NIC. Despite their promising new functionality, programmable switches and NICs are not all-powerful; they have limited state, support limited types of operations, and limit per-packet computation to operate at line rate. In this talk, I […]

    CBE Seminar: “Collaboration and Competition Between Active Sheets for Self-Propelled Particles”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    Abstract: Biological species routinely collaborate for their mutual benefit or compete for available resources, thereby displaying dynamic behavior that is challenging to replicate in synthetic systems. Here, we use computational modeling to design microscopic, chemically active sheets and self-propelled particles encompassing the appropriate synergistic interactions to exhibit bio-inspired “feeding”, “fleeing” and “fighting”. This design couples […]

    MSE Faculty Candidate Seminar: “Defect Structure Process Maps for Laser Powder Bed Fusion Additive Manufacturing”

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    Auditorium, LRSM Building 3231 Walnut Street, Philadelphia, PA, United States

    Additive manufacturing (AM) greatly expands the design freedom and near-net shape production of metallic components across multiple length scales. However, defects arising from starting materials, processing conditions, and post-processing may significantly affect the structural integrity and operational performance of metal AM parts. This paper seeks to elucidate common defects and defect formation mechanisms encountered in […]

    CBE Dissertation: “DNA Mediated Particle Adhesion”

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    Raisler Lounge (Room 225), Towne Building 220 South 33rd Street, Philadelphia, PA, United States

    Advisor: John Crocker, PhD; Committee Members: Talid Sinno, PhD; Scott Diamond, PhD; and Daniel Hammer, PhD

    MEAM Seminar: “Liquid Crystal Elastomers”

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    Wu and Chen Auditorium (Room 101), Levine Hall 3330 Walnut Street, Philadelphia, PA, United States

    Liquid crystal elastomers are rubbery solids with liquid crystal mesogens incorporated into their main chains. They display an isotropic to nematic phase transformation accompanied by a large spontaneous deformation. This in turn leads to rich variety of phenomena including ultra-soft behavior, stripe domains, shape-morphing etc. Further, when made as slender structures, the structural instability of […]

    MEAM Doctoral Dissertation Defense: “Applications of a Double-stranded Elastic Rod Model to DNA”

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    4E9, DRLB 209 S. 33rd Street, Philadelphia, PA, United States

    In the first part of the presentation, we discuss a double-stranded elastic rod (birod) model and apply it to study allosteric interactions between two ligands on DNA. Next, we combine the birod model with statistical mechanics and use it to study the temperature-induced strand separation in dsDNA. Allosteric interaction between two ligands on DNA is […]