Summer Research 2021 Poster Session
Summer 2021
The classic three-body problem, which is to understand the motions of three objects interacting under their own gravity, is notoriously complicated. The gravitational potential leads to chaotic trajectories, and requires sophisticated methods to simulate well. Even simplifying by restricting motion to a plane, and only considering scattering collisions still leaves a chaotic problem. While the … Read more
Abstract: We expand on existing work and study the angular dynamics of isotropic and anisotropic particles in turbulence, and demonstrate capabilities in measuring the various quantities involved in these dynamics. We examine the shape-dependence of particle dynamics in turbulence by looking at disc-like triads and spherical tetrads. We see that large particles behave differently than … Read more
Abstract: The Ellis lab investigates a variety of non-Hermitian systems where active manipulation of the equations of motion can be used to engineer novel behavior. The instrumentation behind such manipulation and study of high-frequency oscillators is the focus of this research; we assess the efficacy of using a Raspberry Pi with external audio card connected … Read more
Live Poster Session: https://wesleyan.zoom.us/j/99443973421?pwd=bGFaMXprMGJ2b0RrSyszVFMxbG05UT09 Abstract: Water is ubiquitous and people are familiarized with the fact that water manifests itself in its solid, liquid, and gas forms in nature. However, the dynamics and thermodynamics behind the phase diagram of water are not fully understood. In its supercooled region (below 0 °C/273 K), water undergoes a novel … Read more
The Link Between Star Polymer Structure and polymer/polymer-film dynamics Abstract: Modern nanotechnological innovations are ubiquitous parts of our lives. Nanotechnology can be found anywhere – from coronavirus vaccines to soaps and even foods. Ultra-thin films have widespread use in industry, including aeronautics, health, and plastics manufacturing. Star polymers are simple extensions of linear polymers consisting … Read more
Live Poster Session: Zoom Link Abstract: Coherent perfect absorption (CPA) is a steady-state process in which a lossy cavity completely absorbs the energy from an incident wavefront. This is done by engineering the interference pattern inside the cavity through manipulation of the relative amplitudes and phases of incoming waves at their respective input ports. The … Read more
Abstract: We use molecular simulations to examine the effects of small additive particles on dynamics in coarse-grained polymer systems. We model additives and monomers as spheres, and we use additives of diameters ranging from 60% of the monomer diameter to 200% of the monomer diameter. The effects of larger nanoparticles on polymer dynamics have been … Read more
Abstract: When designing and producing solar panels, it is essential to know the solar panel material’s efficiency in converting sunlight into electricity. This efficiency is largely determined by the lifetime of charge carriers (i.e. electrons) within the solar cell material. Using terahertz spectroscopy, Sher’s lab has been modeling the lifetime of electrons in solar cell … Read more
Abstract: Organic-inorganic perovskite semiconductors are a promising new material in the world of solar cell technology. Though these materials show promising photo conversion efficiencies (over 29% in perovskite-silicon tandem cells), they present numerous difficulties when facing real-world application. In mixed-halide perovskites, a phenomenon known as halide segregation occurs upon photoexcitation of the material, which can … Read more
Live Poster Session: Zoom Link Abstract: In many physics education research studies, students are given a conceptual evaluation prior to instruction, called a “pre-test” and then again after, which is called a “post-test”. It is common to use “normalized gain”, or “normalized change” to characterize student learning in these studies. Normalized gain is calculated by … Read more