Highlights
May 3, 2023
Big Idea: Future of Work at the Human-Technology Frontier
Inverse Design of Mechanical Metamaterials with Target Nonlinear Response via a Neural Accelerated Evolution Strategy
Katia Bertoldi (Mechanics) and Chris Rycroft (Applied Math)
A team at the Harvard MRSEC led by Bertoldi and Rycroft has developed a framework to design mechanical metamaterials with target nonlinear response. Neural networks were used to accurately learn the relationship between the geometry and nonlinear mechanical response of these metamaterials.
Jan 13, 2023
Big Idea: NSF 2026
Monitoring the Solution Persistence of Porous Coordination Cages with Diffusion NMR Spectroscopy and Cryogenic Transmission Electron Microscopy
G. Taggart, A. Guliyeva, K. Kim, G. Yap, D. Pochan, T. Epps, E. Bloch (University of Delaware), University of Delaware MRSEC DMR-2011824
Here, diffusion of NMR spectroscopy, transmission electron microscopy, and cryogenic transmission electron spectroscopy were used to characterize porous cages in solution. A combination of the methods can be used to discriminate between assembled cages as opposed to decomposed or isomerized materials while dissolved in polar organic solvents, regardless of the metal cations used in their assembly.
Jan 13, 2023
Big Idea: Quantum Leap
Bi2Se3 Growth on (001) GaAs Substrates for Terahertz Integrated Systems
Y. Lui, S.Law, J.O.Zide, A.Janotti (University of Delaware), A.V.Davydov and G. Bryant (NIST), University of Delaware MRSEC DMR-2011824
The research focus involves understanding how to integrate van der Waals materials like Bi2Se3 with industrially-relevant semiconductor materials like GaAs(001) using molecular beam epitaxy (MBE) for THz applications, as well as determining the chemical composition and bonding type of the Bi2Se3/GaAs(001) interface using density functional theory (DFT) calculations.
Jun 23, 2022
Big Idea: Growing Convergence Research, Understanding the Rules of Life
Ultrasensitive detection of various biomarkers including SARS-CoV-2 using deformed graphene channel field effect biosensors
R. Bashir, N. Aluru, A. M. van der Zande, University of Illinois at Urbana-Champaign
Field-effect transistor (FET)-based biosensors allow label-free detection of biomolecules by measuring their intrinsic charges. We previously reported the extremely low limit of detection on electrical field effect-based sensors using crumpled graphene. Here, we use FETs with a deformed monolayer graphene channel for the detection of various biomarkers.
May 20, 2022
Big Idea: Synthetic Materials Biology, Understanding the Rules of Life
Packaging and Release of mRNA and of other Macromolecules from Supramolecular Virus-Like Assemblies
Virgil Percec, University of Pennsylvania
We developed one-component, sequence-defined Ionizable Amphiphilic Janus Dendrimers (IAJDs) and their assemblies with mRNA. These Dendrimersome Nanoparticles (DNPs) were investigated for the delivery of mRNA for vaccines and nanotherapeutics.
May 20, 2022
Big Idea: Machine Learning / Artificial Intelligence
Relationships between structure, memory, and flow in sheared disordered materials
Arjun G. Yodh & Paulo E. Arratia, University of Pennsylvania
A disordered material’s structure and macroscopic mechanical response are related in a non-trivial way. By studying a 2D jammed colloidal system under oscillatory shear, our study elucidates this link in the transition from elasticity to plasticity based on microstructural signatures.
May 17, 2022
Big Idea: Harnessing the Data Revolution, Quantum Leap
First crystal growth and magnetic structure of the high-temperature antiferromagnet Cr2Al
Switching Néel vector orientations in antiferromagnets has been proposed as an ultrafast means of data storage, but the fundamental energy scales of switching cannot be evaluated without oriented measurements on single crystals. These single-crystal methods are vital for understanding if first-principles calculations can predict the energies and dynamics that govern these devices.
May 17, 2022
University of California, Irvine
Atomic-scale origin of the low grain-boundary resistance in perovskite solid electrolyte Li0.375Sr0.4375Ta0.75Zr0.25O3
T. Lee, C.A. Gadre, H. Huyan, C. Du, J. Li, T. Aoki, R. Wu, X. Pan (University of California, Irvine) J. Qi, S. Ko, Y. Zuo, J. Luo, S. P. Ong (University of California, San Diego)
The main goal of this research is to reveal the atomic-scale origin of the low grain-boundary (GB) resistance in Li0.375Sr0.4375Ta0.75Zr0.25O3 (LSTZ0.75) perovskite solid electrolyte and to provide insights on overcoming the ubiquitous bottleneck of high GB resistance in other oxide solid electrolytes.
May 17, 2022
University of California, Irvine
Electrically Fueled Active Materials
S. Selmani, E. Schwartz, J. T. Mulvey, A. Grosvirt-Dramen, W. Gibson, A. I. Hochbaum, J. P. Patterson, R. Ragan, Z. Guan (University of California, Irvine)
The UCI MRSEC team have developed the first electrically-fueled dissipative system that offers rapid kinetics, directionality, and unprecedented spatiotemporal control, closely mimicking systems found in nature.
May 17, 2022
Big Idea: NSF 2026
Student-Industry Seed Projects Teach Essential Skills for Future Success
Preparing students for careers inside and outside academia is a key mission for the Wisconsin MRSEC and its Advanced Materials Industrial Consortium (AMIC). AMIC sponsors student-led seed research projects to help students learn essential skills. AMIC companies suggest project areas, then company engineers work with MRSEC students to develop research proposals that leverage the student’s expertise.
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