Adsorption of fluorophores and N-isopropylacrylamide on Laponite

The adsorption of fluorophores on Laponite XLS particles was derived from the fluorescence spectra and UV absorbance after separating the particles from the dispersion by centrifugation. Addition of N-isopropylacrylamide (NIPAm) to the fluorophore/Laponite XLS dispersion enhanced the excimer emission with appearance of the static excimer, and increased the fluorescence resonance energy transfer (FRET) efficiency.

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► The adsorption of fluorophores on Laponite particles was confirmed.
► Addition of NIPAm to the dispersion enhanced the excimer emission.
► The fluorescence excimer and FRET indicated the adsorption of NIPAm on Laponite.