Center for Physical Sciences and Technology

The role of photon statistics in fluorescence lifetime sensing with Hong–Ou–Mandel effect

Fluorescence lifetime with Hong–Ou–Mandel sensing (FL-HOM) is a novel technique for measuring sub-picosecond fluorescence lifetimes by interfering a fluorescence photon with a reference laser photon. Here, we show how the approach can be simplified to operate from a single femtos...

Multimodal Hyperspectral Imaging Unveils Pigment Rearrangement in the Diatom Cyclotella meneghiniana under Changing Physicochemical Conditions

Abstract Revealing the spatial organization and stress-induced rearrangements of the photosynthetic machinery in thylakoids of diatoms is crucial for understanding their metabolic responses and/or adaptation. Using a multimodal framework that combines coherent anti-Stokes Raman s...

Synthesis of Palladium Nanoclusters and Application in UV Surface-Enhanced Raman Spectroscopy

Abstract Palladium is an attractive but underdeveloped ultraviolet SERS material whose enhancement is strongly coupled to the surface chemistry. We introduce a lipid-confined, dry-state thermal reduction route that converts a drop-cast Na2PdCl4/DOPC precursor on Si into a tunable...

Past rapid spread of introduced livestock coincided with vegetation clearance on Madagascar

Debates persist around the past and present effects of introduced livestock on the native biodiversity of Madagascar. Indeed, the variable habitat and past rate of spread of livestock across the island's distinct ecoregions are poorly known. Sets of 14C and stable isotope data fr...

Formation of Tethered Bilayer Lipid Membranes (tBLMs) Using Plasma Membrane Blebs from Human Lung Cancer Cells

Abstract Plasma membrane blebs, or giant plasma membrane vesicles (GPMVs), serve as excellent biomimetics for studying the compositional complexity of native cell membranes. However, current supported membrane models often lack the stability or submembrane reservoir necessary for...

Comparative Adsorption of PET and PS Nanoplastics onto Graphene Oxide–Cellulose and Graphene Oxide–Chitosan Composites: Thermodynamic, Kinetic, and Isotherm Studies

Polyethylene terephthalate (PET) and polystyrene (PS) nanoplastics are major aquatic contaminants due to their high persistence, mobility, and potential ecological impacts. In this study, PET–NPs and PS–NPs were prepared by nanoprecipitation, and the adsorption of both types of n...

Low-Voltage AC Field Waveforms in Electrospinning: Waveform-Dependent Control of PVP Nanofiber Diameter and Mat Uniformity

A low-voltage alternating current (AC) field (20 V peak-to-peak, 1 kHz) was superimposed on a conventional direct current (DC) electrospinning configuration in order to test whether the shape of that perturbation measurably alters fiber formation. A function generator delivered s...

Stoichiometry-Dependent Charge Carrier Generation Mechanisms in PM6:Y6 Blends

Abstract Understanding how donor–acceptor stoichiometry governs charge carrier separation in non-fullerene bulk heterojunction active layers remains incomplete. By combining transient absorption and time-resolved photoluminescence spectroscopy with selective donor excitation, we...