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Nanosecond Nanothermometry in an Electron Microscope.
Nano Lett
January 2025
University Paris-Saclay, CNRS, Laboratoire de Physique des Solides, Orsay 91405, France.
Thermal transport in nanostructures plays a critical role in modern technologies. As devices shrink, techniques that can measure thermal properties at nanometer and nanosecond scales are increasingly needed to capture transient, out-of-equilibrium phenomena. We present a novel pump-probe photon-electron method within a scanning transmission electron microscope (STEM) to map temperature dynamics with unprecedented spatial and temporal resolutions.
View Article and Find Full Text PDFBarriers to Research for Academic Otologists/Neurotologists in the United States.
Otol Neurotol
February 2025
Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins Hospital, Baltimore, MD.
Objective: The physician-scientist workforce is shrinking in the United States. Academic otologists/neurotologists face a diverse set of barriers to successful careers. We aimed to characterize the factors affecting contemporary otology/neurotology surgeon-scientists.
View Article and Find Full Text PDFOn causal inferences from retrospective and observational studies and their implications for neuraxial labor analgesia: the CHRISTMAS* study.
Int J Obstet Anesth
December 2024
Department of Opthalmology, Hadassah University Medical Center, and Faculty of Medicine, Hebrew University of Jerusalem, Israel; Department of Optometry and Vision Sciences, Hadassah Academic College, Jerusalem, Israel.
Background: Observational studies should not be used to infer causation as they are prone to confounding factors, selection bias, and reverse causality. Many observational studies of labor analgesia treated epidurals as an independent exposure and concluded that "epidurals" cause dystocia, despite multiple randomized controlled trials showing no effect. We highlight this problem using reductio ad absurdum.
View Article and Find Full Text PDFThe Shrinking Fermi Liquid Scenario for Cuprates Under the Scrutiny of Optical Conductivity Measurements.
Materials (Basel)
November 2024
Istituto dei Sistemi Complessi-Consiglio Nazionale delle Ricerche and Dipartimento di Fisica, Università di Roma Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy.
In a recent paper [B. Michon et al., Nat.
View Article and Find Full Text PDFCritical Casimir levitation of colloids above a bull's-eye pattern.
J Chem Phys
December 2024
Max Planck Institute for Intelligent Systems, Heisenbergstraße 3, D-70569 Stuttgart, Germany.
Article Synopsis
- - Critical Casimir forces act on particles in a near-critical fluid, allowing researchers to manipulate particle behavior based on surface properties and small temperature changes.
- - The study explores how these forces can trap colloidal particles by using specially designed substrates with contrasting surface properties, enabling different levitation effects like sedimentation and point levitation.
- - By analyzing various parameters, the research indicates that while the conditions for point levitation become limited when moved away from critical points, the trapping force increases, highlighting potential applications in sorting colloids by size and measuring thermodynamic properties.
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