Fig. 2: Photophysical properties of assembled CNC and co-assembled Lig⊂CNC.
From: Biobased and biodegradable films exhibiting circularly polarized room temperature phosphorescence
a Photos showing time-dependent photoluminescence of CNC and co-assembled Lig⊂CNC films. Scale bar = 1 cm. b Evolution of 2D luminescent spectra of Lig⊂CNC in air. Changes in luminescence (c) and phosphorescence (d) spectra of a CNC thin film loaded with lignosulfonate (Lig) at given mass fractions, fLig = 0 wt % (black profile), fLig = 0.25 wt % (red line), fLig = 0.50 wt % (blue line), fLig = 1.00 wt % (green line), fLig = 2.00 wt % (purple profile) (λex = 365 nm, 25 °C). Insets in (c) correspond to the changes in photoluminescence at 480 nm and (d) phosphorescence at 535 nm. In the experiment, the concentration of CNC was kept constant and the concentration of lignosulfonate was varied (between 0 and 2%, as noted). e Luminescence decay curves of Lig⊂CNC at different fLig.
