Investigation of laser wavelength effect on optical properties of graphene oxide colloidal nanostructures prepared by pulsed laser ablation

Autor:	J. S. Duque Buitrago, A. M. Mesa Yandy, H. Riascos Landázuri
Rok vydání:	2019
Předmět:	History Materials science Nanostructure Graphene business.industry Oxide Laser Computer Science Applications Education law.invention Pulsed laser ablation chemistry.chemical_compound Colloid Wavelength chemistry law Optoelectronics business
Zdroj:	Journal of Physics: Conference Series. 1247:012025
ISSN:	1742-6596 1742-6588
DOI:	10.1088/1742-6596/1247/1/012025
Popis:	In this work we prepared graphene oxide nanostructures (GONE) in a liquid environment using pulsed laser ablation technique. We used for the synthesis Nd: YAG pulsed laser operatating at 1064 nm and 532 nm of wavelength, we study the effect of wavelength of the laser on the optical properties of Nanostructures (NE) synthesized. The aim was determining the optical bandgap and the characteristic peak related by bond transitions using the absorbance UV-Vis spectra. Both samples show high absorption in the ultraviolet region in the UV-Vis spectra. Using Tauc’s plot method we compute the bandgap energy for GONEs assuming indirect bandgap. In addition, we observe characteristic peak formation 1 hour after synthesized NPs at 256 nm for NPs prepared at 1064 nm and for NPs prepared at 532 nm the peak with less intensity is observed at a wavelength of 218 nm. The characteristic peak for both samples increase of intensity 24 hours after preparation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::aa34202da1a204e09be3746a140a3183 https://doi.org/10.1088/1742-6596/1247/1/012025 Zobrazit plný text záznamu