Fig. 2From: Plant-based nano-fertilizer prepared from Paulownia Tomentosa: fabrication, characterization, and application on Ocimum basilicumOptical properties of NFP. A UV–Vis absorption spectrum, B excitation (black line), and fluorescence emission (blue line) spectra. For collecting fluorescence emission spectra, the solution excited at 350 nm, for the collecting excitation spectra, the emission wavelength was 450 nmBack to article page