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Effects of Liquid Medium and Ablation Wavelength on the Properties of Cadmium Sulfide Nanoparticles Formed by Pulsed‐Laser Ablation
Author(s) -
García Guillén Grisel,
Zuñiga Ibarra Veronica Anahi,
Mendivil Palma Maria Isabel,
Krishnan Bindu,
Avellaneda Avellaneda David,
Shaji Sadasivan
Publication year - 2017
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201601056
Subject(s) - x ray photoelectron spectroscopy , cadmium sulfide , laser ablation synthesis in solution , materials science , nanoparticle , laser ablation , nanomaterials , fluence , transmission electron microscopy , analytical chemistry (journal) , crystallinity , spectroscopy , laser , nanotechnology , chemical engineering , optics , chemistry , organic chemistry , x ray laser , laser power scaling , physics , quantum mechanics , engineering , metallurgy , composite material
Pulsed‐laser ablation in liquid (PLAL) is a green synthesis technique to obtain semiconductor nanomaterials in colloidal form. Herein, cadmium sulfide (CdS) nanoparticles were synthesized by the pulsed‐laser ablation of a CdS target in different liquid media by using λ =532 and 1064 nm outputs from a pulsed (10 ns, 10 Hz) Nd:YAG laser at different ablation fluence values. The morphology, structure, crystalline phase, elemental composition, optical, and luminescent properties of CdS nanomaterials were analyzed by using transmission electron microscopy (TEM), X‐ray diffraction (XRD), X‐ray photoelectron spectroscopy (XPS), UV/Vis absorption spectroscopy, and fluorescence spectroscopy. By changing the liquid medium and ablation wavelength, CdS nanoparticles with different morphology and size were formed, as demonstrated by using TEM analysis. The crystallinity and chemical states of the ablation products were confirmed by using XRD and XPS analyses. The optical bandgap of the CdS nanoparticles was dependent on the ablation wavelength and the fluence. These nanocolloids presented different green emissions, which implied the presence of several emission centers. CdS nanocolloids in distilled water catalyzed the photocatalytic decay of methylene blue dye under light irradiation from a solar simulator.