Using Femtosecond Laser Pulses to Explore the Nonlinear Optical Properties of Au NP Colloids That Were Synthesized by Laser Ablation

Ashour, Mohamed; Faris, Hameed G.; Ahmed, Hanan B.; Mamdouh, Samar; Thambiratnam, Kavintheran; Mohamed, Tarek

doi:10.3390/nano12172980

Cited by 12 publications

(2 citation statements)

References 56 publications

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“…Figure 5 b, which depicts this finding, demonstrates how the number of nanoparticles with small sizes increases while the number of nanoparticles with large sizes decreases after a 10-min ablation time. The bandgap of ZnONP colloids decreases from 5.28 to 5.1 eV with decreasing size from 19.5 to 16.2 eV, which disagrees with the theory of electron confinement at the nanoscopic scale [ 60 , 61 , 62 ]. This theory is only applicable to nanoparticles in the quantum range that are between 1 and 10 nm in size, and is not applicable to particles larger than 10 nm, as shown in Figure 4 and Figure 5 .…”

Section: Resultscontrasting

confidence: 67%

Nonlinear Optical Properties of Zinc Oxide Nanoparticle Colloids Prepared by Pulsed Laser Ablation in Distilled Water

et al. 2022

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The nonlinear optical properties of zinc oxide nanoparticles (ZnONPs) in distilled water were measured using a femtosecond laser and the Z-scan technique. The ZnONPs colloids were created by the ablation of zinc bulk in distilled water with a 532 nm Nd: YAG laser. Transmission electron microscopy, an ultraviolet-visible spectrophotometer, and atomic absorption spectrophotometry were used to determine the size, shape, absorption spectra, and concentration of the ZnONPs colloids. The nonlinear absorption coefficient and nonlinear refractive index were measured at different excitation wavelengths and intensities. The nonlinear absorption coefficient of the ZnONPs colloids was found to be positive, caused by reverse saturable absorption, whereas the nonlinear refractive index was found to be negative due to self-defocusing in the ZnONPs. Both laser parameters, such as excitation wavelength and input intensity, and nanoparticle features, such as concentration and size, were found to influence the nonlinear optical properties of the ZnONPs.

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Section: Resultscontrasting

confidence: 67%

Nonlinear Optical Properties of Zinc Oxide Nanoparticle Colloids Prepared by Pulsed Laser Ablation in Distilled Water

et al. 2022

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“…Various types of methods were used for manufacturing MNPs. For instance, gold nanoparticles (Au NPs) were prepared in pure distilled water using a nanosecond Nd: YAG laser with a constant laser energy of 100 mJ and an ablation time of 5 or 10 min [208]. Using a transmission electron microscope (TEM) and UV-visible spectrophotometer analysis, the researchers investigated the structure and linear optical properties of the Au NPs.…”

Section: Metal Nanoparticlesmentioning

confidence: 99%

Targeted Nanoparticle-Based Diagnostic and Treatment Options for Pancreatic Cancer

Gu,

Minko

2024

Cancers

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Pancreatic ductal adenocarcinoma (PDAC), one of the deadliest cancers, presents significant challenges in diagnosis and treatment due to its aggressive, metastatic nature and lack of early detection methods. A key obstacle in PDAC treatment is the highly complex tumor environment characterized by dense stroma surrounding the tumor, which hinders effective drug delivery. Nanotechnology can offer innovative solutions to these challenges, particularly in creating novel drug delivery systems for existing anticancer drugs for PDAC, such as gemcitabine and paclitaxel. By using customization methods such as incorporating conjugated targeting ligands, tumor-penetrating peptides, and therapeutic nucleic acids, these nanoparticle-based systems enhance drug solubility, extend circulation time, improve tumor targeting, and control drug release, thereby minimizing side effects and toxicity in healthy tissues. Moreover, nanoparticles have also shown potential in precise diagnostic methods for PDAC. This literature review will delve into targeted mechanisms, pathways, and approaches in treating pancreatic cancer. Additional emphasis is placed on the study of nanoparticle-based delivery systems, with a brief mention of those in clinical trials. Overall, the overview illustrates the significant advances in nanomedicine, underscoring its role in transcending the constraints of conventional PDAC therapies and diagnostics.

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Femtosecond nonlinear optical properties of push–pull chromopohores using Z-scan technique: experimental and computational studies

El-Khouly,

Kobaisy,

Ahmed

et al. 2023

Opt Quant Electron

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Using Femtosecond Laser Pulses to Explore the Nonlinear Optical Properties of Au NP Colloids That Were Synthesized by Laser Ablation

Cited by 12 publications

References 56 publications

Nonlinear Optical Properties of Zinc Oxide Nanoparticle Colloids Prepared by Pulsed Laser Ablation in Distilled Water

Nonlinear Optical Properties of Zinc Oxide Nanoparticle Colloids Prepared by Pulsed Laser Ablation in Distilled Water

Targeted Nanoparticle-Based Diagnostic and Treatment Options for Pancreatic Cancer

Femtosecond nonlinear optical properties of push–pull chromopohores using Z-scan technique: experimental and computational studies

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