In this study, fullerenes (C60) thin film was prepared via a novel combination of laser pulsed and electrospray methods using wasted batteries’ electrodes as precursor. The effect of the applied electric potential using electrospray process was investigated through the structural, morphological and optical analyses. These in turn were examined using x-ray diffraction, field emission scanning electron microscopy, energy dispersive spectroscopy, and photoluminescence techniques. In particular, using Williamson-Hall relation, the average crystallite size of the prepared nanoparticles was estimated in which it was found in the range of 41.46-111.84 nm. While sample treated with 5.6 kV of electric potential exhibited particle size of 6.35 nm using FESEM technique as compared to 7.4 nm for sample prepared under free potential. It is believed that the applied electric potential plays a vital role in reducing the particle size which in turn provides an alternative pathway for fabricating future optoelectronic design.
The size and the concentration of the gold nanoparticles (GNPs)synthesized in double distilled deionized water (DDDW) have beenfound to be affected by the laser energy and the number of pulses.The absorption spectra of the nanoparticles DDDW, and thesurface plasmon resonance (SPR) peaks were measured, and found tobe located between (509 and 524)nm using the UV- Visspectrophotometer. SPR calculations, images of transmissionelectron microscope, and dynamic light scattering (DLS) methodwere used to determine the size of GNPs, which found to be rangedbetween (3.5 and 27) nm. The concentrations of GNPs in colloidalsolutions found to be ranged between (37 and 142) ppm, andmeasured by atomic absorption spectroscopy (AAS).
Nanocellulose crystals (NCC) were isolated from the palm fronds by sonication and hydrolyzed processes and modification of them by the prepared ZnO nanoparticles (ZNPs) utilizes pulsed laser ablation in water. NCC:ZNPs layers were fabricated using the spin coating technique. The morphological properties of NCCs and NCC: ZNPs layers were investigated by atomic force microscopy (AFM), scanning electron microscopy and field-effect scanning electron microscope (FESEM) respectively. NCC fibers have been shown a long fibrous shape with layer fibrous sheets about 60 nm of thickness consist of nano tapes between 30 nm to 70 nm of width and thickness sequentially. ZNPs clusters appeared clearly in FE-SEM image as individual growths between 20 nm to 240 nm of size and around NCC fibers. The structural properties of prepared layers have been characterized by X-ray diffraction (XRD) technique, the domain peak of cellulose is found at 22.54° mostly. There is increasing in the crystallinity indices with the number of layers were increased in both NCC and NCC: ZNPs films. The sensing of N2, H2 and NH3 gases were measured, generally the sensitivity of gases increased with adding of ZNPs expect N2.
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