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Effect: We have demonstrated that the shape of the Hanle curve (non-local resistance versus applied magnetic field) can be manipulated using an ac drive.

The 2024 Holiday Science Lecture “Science by Candlelight” was held at Princeton University on December 7, 2024 with over 530 people attending two lectures at McDonnell Hall. Howard Stone led the lecture, and was joined by Julia Mikhailova, Angie Miller (chemistry department demonstrator) and other PCCM researchers (including graduate students and postdocs).

Researchers from North Carolina State University have developed a novel and versatile modeling strategy to simulate polyelectrolyte systems. The model has applications for creating new materials as well as for studying polyelectrolytes, including DNA and RNA.

Discovery: Magnetic properties of cobalt films can be optimized through nanoscale structuring and thermal annealing.

New property of electrons may lead to novel electronic devices How electrons conduct electricity depends on their valley  

Researchers at the University of Pennsylvania have made a microfabricated laser using semiconductor fabrication methods that can control two features of the light particles: their orbit and their spin. This allows them to make light particles with four states simultaneously. These higher-dimensional quantum bits (qudits) can store more information and better avoid noise. They can also make quantum communication more secure and faster and allow more secure communications.

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.

The thermal properties of oxides are of interest for a number of important applications, including thermoelectrics, thermal barrier coatings, memristors, and fuel cells. MIT MRSEC researchers demonstrated, for the first time, the controllable impact of oxygen defects on the thermal conductivity of a reducible oxide. The thermal conductivity was modulated by varying the concentration of oxygen vacancies and reduced cations in oxide thin films treated under different annealing conditions.

Aligned liquid crystal elastomers (LCEs) are soft materials that exhibit reversible actuation akin to human muscles when thermally cycled above their nematic-to-isotropic transition temperature. Lewis and collaborators studied the effects of LCE ink composition, nozzle geometry, and printing parameters on director alignment.