Raman Micro-Spectroscopic Investigation of Corrosion Products.

Conference, ICPSEATS

doi:10.21608/ejchem.2022.155709.6728

Cited by 5 publications

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Reactive oxygen species creation by laser-irradiated indocyanine green as photodynamic therapy modality: an in vitro study

Atta,

Elarif,

Al Bahrawy

2023

Lasers Med Sci

View full text Add to dashboard Cite

Applications of lasers in phototherapy have been the trend for the last few decades. The photodynamic therapy process normally depends on photosensitizers and laser beams. Through this study, indocyanine green has been used as a photosensitizer, which is normally activated using laser lines between 750 and 805 nm. The activity of the indocyanine green to do fluorescence by other pulsed laser sources has been tested by fluorescence technique, and it has been proven that the laser lines at 810, 940, and 980nm are able to excite the indocyanine green with different extents. The indocyanine green activation has been tested by several laser lines (810, 940, and 980 nm) commonly used as surgical lasers. The generated oxygen has been measured after irradiating the indocyanine green with the different laser lines. A comparison has been made between laser irradiation as a pinpoint and a broad beam. It is found that the wide beam is more effective in activating oxygen production. In the end, it is concluded that lines 810 and 940nm were effective in activating the used dye, while the 980nm activity did not show enough efficiency.

show abstract

Reactive oxygen species creation by laser-irradiated indocyanine green as photodynamic therapy modality: an in vitro study

Atta,

Elarif,

Al Bahrawy

2023

Lasers Med Sci

View full text Add to dashboard Cite

show abstract

RETRACTED ARTICLE: Effect of micro-viscosity on the rotational diffusion: pulsed laser-based time-resolved single-molecule study

Atta,

Gweily

2023

Opt Quant Electron

View full text Add to dashboard Cite

The effect of the changes in buffer concentrations or any additives like surfactants in the protein samples during the analysis on the single-biomolecule diffusion is one of the hidden points in the single-molecule time-resolved measurements. In the current work, phosphoglycerate kinase (PGK) labeled with Atto-647 has been investigated on the single molecule level while it diffuses in Na2CO3 buffer at concentrations that vary from 10 mg/l up to 50 mg/l. The fluorescence lifetime of PGK labeled with Atto-647 in 50 mg/ml Na2CO3 has been measured, and it was found to be 2.7 ns. The fluorescence cross correlation of the diffused protein has also been measured, which confirms that the used samples are at a single molecule level. Time decay fluorescence anisotropy has been performed for PGK labeled with Atto-647 in different concentrations of Na2CO3, and the results confirmed that there is a clear impact on the molecular translational and rotational diffusion even with slight changes in the buffer concentration.

show abstract

Photocatalytic degradation of methylene blue dye by ZnO nanoparticle thin films, using Sol–gel technique and UV laser irradiation

Atta,

Wahab,

Ibrahim

et al. 2024

Sci Rep

View full text Add to dashboard Cite

The focus of the current work is the study of the effect of the photo-catalytic activity of ZnO nanoparticles. The photocatalytic destruction of methylene blue dye, a common water contaminant, was used to assess the photocatalytic efficiency of the ZnO nanoparticles from its aqueous solution by using ZnO nanoparticles thin film under UV light and laser irradiation. Sol–gel methods prepared ZnO nanoparticle thin films. X-ray diffraction and a field-emitted scanning electron microscope were utilized to examine the structure of the produced ZnO nanoparticles. An extended characterization by laser-based fluorescence and UV–visible spectroscopic techniques. The effects of operational parameters such as photo-catalyst load and contact time on photocatalytic degradation of methylene blue were investigated. The recent study’s findings showed that irradiation with a UV laser increases with power density 25 µW/cm2, the photo-catalytic rate. The UV spectra show decay for the band at 664nm decreased and the concentration of M.B. in monomer form decayed to 26% of the original concentration in 24 h, while the band at 612 which is related to the dimer M.B. molecules was not affected. The laser irradiation did the same for monomer M.B. molecules in only 3 h, while the dimer decreased to 28% of its original concentration. The reaction mechanism has been discussed by molecular modelling. Quantum mechanical calculations at B3LYP/6-311g(d,p) level indicated that methylene blue changed from dimers to monomers in the existence of ZnO. The current results present a method for degrading M.B. not only in wastewater but also in the industrial waste scale.

show abstract

Raman Micro-Spectroscopic Investigation of Corrosion Products.

Cited by 5 publications

References 26 publications

Reactive oxygen species creation by laser-irradiated indocyanine green as photodynamic therapy modality: an in vitro study

Reactive oxygen species creation by laser-irradiated indocyanine green as photodynamic therapy modality: an in vitro study

RETRACTED ARTICLE: Effect of micro-viscosity on the rotational diffusion: pulsed laser-based time-resolved single-molecule study

Photocatalytic degradation of methylene blue dye by ZnO nanoparticle thin films, using Sol–gel technique and UV laser irradiation

Contact Info

Product

Resources

About