Label-free determination of diffusion coefficients at the nanoscale through modelling of the Surface Plasmon Resonance signal.

Surface plasmon resonance (SPR) is normally used to measure the kinetic parameters of biomolecular interactions between a molecule immobilized on a gold surface and another one flowing in a microfluidic channel above the surface. During the SPR measurements, convection-diffusion phenomena occur inside the microfluidic channels, but they are generally minimized by appropriate experimental setup in order to obtain diffusion free kinetic parameters of the molecular interactions. In this work, for the first time, a commercial SPR apparatus has been used to obtain non canonical scientific parameters.

Correction: Fast detection of penicillium rot and the conservation status of packaged citrus fruit using an optical array sensor.

Correction for 'Fast detection of penicillium rot and the conservation status of packaged citrus fruit using an optical array sensor' by Alessia Cavallaro , , 2024, , 13702-13705, https://doi.org/10.1039/D4CC04700A.

Fast detection of penicillium rot and the conservation status of packaged citrus fruit using an optical array sensor.

A novel optical array sensor designed to detect the conservation status of citrus fruit as well as contamination of ripened fruits by green mold incited by the fungus is reported here. The device demonstrates high sensitivity, specificity, and cost-effectiveness, making it suitable for integration into the citrus fruit supply chain, including production and packaging systems.

Role of Density and Conformational Composition in the Surface-to-Bulk Molecular Dosing of Photosensitive Surfactant Monolayers.

Poorly water-soluble photosensitive monolayers might enable very precise control of the rate and number of desorbing molecules by controlling both the monolayer density and conformational composition. In this perspective, we systematically characterized the interfacial behavior of Langmuir monolayers consisting of a poorly water-soluble azobenzene-containing surfactant as a function of its trans/cis ratio. Precise control of the conformational ratio was achieved by controlling the UV irradiation time, allowing researchers to investigate compositions spanning from 100% trans to 90% cis.