Research Highlights

Fractional Quantum Hall Effect in Weyl Semimetals

Strong electron-electron interactions can give rise to an energy gap without breaking crystal translational symmetry. This leads to a unique state, a 3D version of nonabelian 2D fractional quantum Hall liquids. The properties of this exotic state may be useful in quantum computing applications.

Nematicity’s impact on spin fluctuations and superconductivity

The role of nematicity on the relationship between AFM fluctuations and superconductivity was discovered in
iron-based superconductor Fe(Se1-xSx) systems.

Graphical depiction of the role of nematicity

3D Assembly of Gold Nanorods

Interplay of temperature, salt concentration, pH, and interpolymer complexation (IPC) provides an unparalleled diverse set of control parameters to assemble nanoparticles and nanostructures

Full-Scale Ab Initio Theory for Dynamic Nuclear Polarization

This advanced theory enables the in silico design of better polarizing agents and DNP matrices. The structure of core-shell materials can now be determined by predicting the spatial distribution of DNP enhancements.

Selective hydrogenation of nitrate to ammonia in the absence of precious metal catalysts

Nitrate removal from water supplies is a thermodynamically difficult and expensive task. Removal by hydrogenation has relied on catalysts that include scarce precious metals, e.g., Pd. Thus, discovery of an effective alternative is essential.

Maximizing Hydrogen Efficiency in the Conversion of Biorenewables to Polymer Precursors

An advanced catalyst enables conversion of biomass derivatives into nylon precursors at low temperature and ambient hydrogen pressure. This advancement can lead to large energy savings, decreased environmental impact, and lower cost reactors for processing biorenewables with improved safety.

Illustration of catalytic hydrodemethoxylation

Reshaping of Truncated Pd Nanocubes

Realistic Atomistic-Level and Coarse-Grained Modeling of Energy Landscapes and Kinetics

Development of permanent magnets using low cost mischmetal

CMI research at Ames Laboratory used high-throughput (HiTp) synthesis and rapid characterization to identify permanent magnet alloy compositions with decreased critical material content, and was accepted for publication in ACS Combinatorial Science.

High-throughput (HiTp) synthesis and rapid characterization was used to identify permanent magnet alloy compositions with decreased critical material content.

Functionalizing magnet additive manufacturing systems with in-situ magnetic field source

CMI technical publication on functionalizing permanent magnet additive manufacturing systems with a magnetic field source. The field source was modeled, designed, prototyped and tested on an existing table-top commercial 3D printer.

Depiction of the magnetic-field aligning permanent magnet-producing apparatus, side view.

Complex oscillatory decrease with size in the diffusivity of epitaxially-supported 3D metal nanoclusters

Theoretical analysis reveals a complex oscillatory decay in the diffusivity of {100}-epitaxially supported fcc metal nanoclusters (NCs) with increasing size. NCs have a 3D structure for weak adhesion to oxide or other supports. Results contrast traditional assumptions of monotonic decay with increasing size.