Madison Singleton

All Publications

• Two-component dynamics in supercritical [Formula: see text] from inelastic X-ray scattering. Scientific reports Majumdar, A., Sun, P., Singleton, M., Paolasini, L., Bosak, A., Baron, A. Q., Hastings, J., Ihme, M. 2026

  Abstract

  Supercritical fluids are characterized by unique thermodynamic properties. One of these properties is the existence of two-component dynamics that is associated with distinct low-frequency and high-frequency vibrational responses of the fluid. However, the origin of this behavior remains unknown. By combining inelastic X-ray scattering and molecular dynamics simulations, we show that this behavior can be connected to density heterogeneities arising from molecular clusters. Analyses of measurements and molecular trajectories suggest that the two-component dynamics emerges due to distinct momentum fluctuations of clustered and unbound molecules. This connection between clusters and two-component dynamics highlights the importance of molecular-structural heterogeneities in supercritical fluids, colloids, and condensed-matter systems.

  View details for DOI 10.1038/s41598-026-38697-z

  View details for PubMedID 41673444

• An Ultra-Compact X-ray Regenerative Amplifier Free-Electron Laser INSTRUMENTS Singleton, M., Rosenzweig, J., Tang, J., Huang, Z. 2024; 8 (1)

  View details for DOI 10.3390/instruments8010002

  View details for Web of Science ID 001543921300001