CARBON NANOPARTICLES PREPARED BY LASER ABLATION IN LIQUID ENVIRONMENT

Khawla Khashan (), Majid S. Jabir and Farah A. Abdulameer
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Majid S. Jabir: #x2020;Division of Biotechnology, Department of Applied Science, University of Technology, Baghdad, Iraq
Farah A. Abdulameer: Division of Laser Physics, Department of Applied Science, University of Technology, Baghdad, Iraq

Surface Review and Letters (SRL), 2019, vol. 26, issue 10, 1-8

Abstract: In the present study, carbon nanostructures were synthesized by laser ablation of graphite in de-ionized water. Q-switched Nd:YAG laser of 1064nm wavelength, 9ns pulse width, and different laser fluences (3.6, 5.4, 10.6, and 14.6J/cm2) were utilized to irradiate the target. XRD measurements demonstrated the presence of the two carbon phases (002, 111) except for the sample prepared at 3.6J/cm2 laser fluence; it showed disappearance of (002) phase. This result can be an indication of changing the phase of carbon nanomaterials when prepared at this fluence. TEM revealed that carbon nanoparticles had a spherical shape and were 10–90nm in size, while nanostructure carbon prepared at 3.6J/cm2 has nanosheets 45mm in width and 275mm in length. The absorption of CNPs indicated the appearance of the absorption peak at about 305nm, which is attributed to the π–π* transition of the C = O band. PL emission was decreased at the higher laser fluence (14.6J/cm2) due to the quenching of the carbon nanoparticles luminescence.

Keywords: Pulsed laser ablation in liquid; carbon nanoparticles; transmission electron microscopy (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0218625X19500781

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