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Nanoscale Solvent Exchange
In article number 2305779, Hongyu Chen and co‐workers achieve real‐time monitoring of nanoscale solvent exchange within silica micropores with millisecond resolution. This accomplishment involves embedding a rotor‐based fluorophore into colloidal silica nanoparticles, which enables precise fluorescence detection of diffusion‐related microenvironment changes and quantitative...
Measuring the diffusivity of molecules is the first step toward understanding their dependence and controlling diffusion, but the challenge increases with the decrease of molecular size, particularly for non‐fluorescent and non‐reactive molecules such as solvents. Here, the capability to monitor the solvent exchange process within the micropores of silica with millisecond time resolution is demonstrated,...