Structural and optical properties of graphene/chlorophyll pigment nanocomposite

Document Type : Research Paper


1 Department of physics, College of Science for Women, University of Babylon ,Hilla, Iraq

2 University of Babylon/Iraq

3 Department of Laser Physics/College of Science for Women/University of Babylon


Compared with their bulky or nanosized counterparts, nanostructured carbon materials attract many researchers due to their diverse practical applications. Graphene has been successfully fabricated using a pulsed laser ablation process. It relies on the exfoliation of a graphite disc to induce polycarbonate sheets suspended in an aqueous medium (deionized water). Chlorophyll was extracted from spinach and then mixed with graphene. The properties were studied using a scanning electron microscope (SEM) and X-ray diffraction (XRD). Various graphene nanostructures have been observed, such as disks, dots, and fibers. The optical properties were studied by UV-vis spectroscopy and photoluminescence (PL) measurements. PL of graphene typically shows strong photoemission in the visible region (400.7 nm, 675.3 nm). The pulsed laser, with a wavelength of 1064 nm, an energy of 80 mJ, a frequency of 6 Hz, and a number of pulses of 400 pulses, has the ability to generate nanoparticles have a spherical shape and different sizes and have an almost homogeneous distribution with absorption peak at 285.4nm . The pulsed laser has the ability to exfoliation graphite layers through the appearance of a single peak of low intensity compared to graphite.