Improved fluorescence quantum yield of nanosecond pulse laser ablation wavelength controlled cinnamon nanostructures grown in ethylene glycol medium

Abstract

Nanosecond pulse laser ablation in liquid (PLAL) method was used to prepare some crystalline cinnamon nanostructures (Cin-NSs) in ethylene glycol (EG) medium. Effect of various laser wavelengths (532, 1064, and 1139 nm) on the structures, morphologies, and optical characteristics of these Cin-NSs were determined. The average diameter and lattice spacing of these crystalline Cin-NSs was ranged from 4.9 ± 0.1 to 6.8 ± 0.1 nm and 0.112 to 0.149 nm, respectively. The fluorescence quantum yields of these NSs were increased from 0.024 to 0.043 due to the change of laser wavelengths. The presence of cinnamaldehyde and flavonoids compounds in the Cin-NSs was mainly responsible for the observed improvement of the optical and structural properties. The obtained Cin-NSs may be useful for the new drug formulation.