Enhance Preparation and Characterization of Nickel-Oxide as Self-Cleaning Surfaces

Haider, Adawiya J.; Anbari, Riyad Al; Sami, Hiba M.; Haider, Mohammed J.

doi:10.1016/j.egypro.2018.11.298

Cited by 39 publications

(14 citation statements)

References 28 publications

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“…( 2). Through the results that were reached and according to the graph in Figure 3, it was observed that the thickness of the PSi layer increases with the increase in the intensity of the laser beam and this is consistent with the research of S. Polisski et al [19]. This indicates that the laser intensity parameter has a significant impact in determining the thickness of the PSi layer.…”

Section: Morphology Of Psi Layer (Porosityand Layer Thickness)supporting

confidence: 88%

“…Si wafer is placed in the cell after the cleaning process and linked as shown in Figure 1. In this process, a 650-nm red color diode laser is used to achieve the greatest penetration depth of silicon to produce a thick layer of PSi if a short wavelength laser was used [18][19] where the maximum power of the diode laser is 100mw. The current density was fixed at 8 mA/cm 2 and during 20 min, different laser intensities (10, 15, 20, 25 mw/cm 2 ) is changed and after the completion of the etching process, the amount of porosity (p) is calculated for each sample according to the following weight equation [20] :…”

Section: Methodsmentioning

confidence: 99%

“…The PSi layer appears with a pore diameter ranging from 200 to 700 nm and a maximum percentage number of this pore size reaching 500 nm. It can be observed a formation of the second gradation in a formation of the porous layer leads to an increase in the surface area of the PSi layer, and thus increases the area exposed to the gas [19]. Another thing that contributes to the effectiveness of the area exposed to the gas and the increase in the efficiency of the silicon sensor is the apparent roughness in the surface and the smallness of the silicon nanostructures (pores walls).…”

Section: Morphology Of Psi Layer (Porosityand Layer Thickness)mentioning

confidence: 98%

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Fabrication of Porous Silicon as a Gas Sensor: The Role of Porous Silicon Surface Morphology

Abdullah¹,

Haider²,

Jabbaar³

2022

JASN

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Manufacture of an environmental polluting gas sensor with improved properties by controlling the preparation conditions of the photoelectrochemical etching technique (PECE). The amount of porosity, the diameter of the pores, and the thickness of the prepared layer of porous silicon (Psi) can be controlled by changing one or all of these conditions. In this paper, n-type Si with a crystalline orientation (100) was used, whereby PSi was prepared with the use of a red diode laser with a wavelength of 650 nm, using different radiation intensity, and with the constancy of etching time and current density. Through the results obtained, it was noted that: the porosity increases significantly up to 75% as well as the thickness of the PSi layer up to 1.45 µm with the increase in the intensity of the laser beam. Also, examining the morphology of the surface samples by field emission scanning electron microscope (FE-SEM) besides, the average pore diameters of the prepared samples were calculated. It is clear that the intensity of the laser beam used in the irradiation process is one of the important factors in determining the properties of the prepared PSi. PSi samples have been tested by FTIR to investigate chemical bonds on surfaces such as, (Si-Si, Si-H, Si-H2, Si-O-Si, Si-O-Si, Si-H, Si-O-Si). Samples tested as gas sensors and noticed that an increase in the sensing current to 5.3 µA has appeared with the increase of porosity value where methanol gas is used as background.

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Section: Morphology Of Psi Layer (Porosityand Layer Thickness)supporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Section: Morphology Of Psi Layer (Porosityand Layer Thickness)mentioning

confidence: 98%

See 1 more Smart Citation

Fabrication of Porous Silicon as a Gas Sensor: The Role of Porous Silicon Surface Morphology

Abdullah¹,

Haider²,

Jabbaar³

2022

JASN

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“…4c show the formation of Fe 3 O 4 in solution, producing crystal structure inverse spinel magnetite NPs < 30 nm in diameter that exhibited superparamagnetic behavior 70,71 . This behavior indicated that in the absence of an external magnetic field, the particles had zero magnetization and less tendency to agglomerate [72][73][74][75] . Moreover, compared to metallic NPs, they had better chemical stability and compatibility with living things 8 .…”

Section: Resultsmentioning

confidence: 92%

Targeted delivery of paclitaxel drug using polymer-coated magnetic nanoparticles for fibrosarcoma therapy: in vitro and in vivo studies

Al-Obaidy

Haider

Al-Musawi

et al. 2023

Sci Rep

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Fibrosarcoma is a rare type of cancer that affects cells known as fibroblasts that are malignant, locally recurring, and spreading tumor in fibrous tissue. In this work, an iron plate immersed in an aqueous solution of double added deionized water, supplemented with potassium permanganate solution (KMnO4) was carried out by the pulsed laser ablation in liquid method (PLAIL). Superparamagnetic iron oxide nanoparticles (SPIONs) were synthesized using different laser wavelengths (1064, 532, and 266 nm) at a fluence of 28 J/cm2 with 100 shots of the iron plate to control the concentration, shape and size of the prepared high-stability SPIONs. The drug nanocarrier was synthesized by coating SPION with paclitaxel (PTX)-loaded chitosan (Cs) and polyethylene glycol (PEG). This nanosystem was functionalized by receptors that target folate (FA). The physiochemical characteristics of SPION@Cs-PTX-PEG-FA nanoparticles were evaluated and confirmed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-Ray diffraction (XRD), atomic force microscopy (AFM), and dynamic light scattering (DLS) methods. Cell internalization, cytotoxicity assay (MTT), apoptosis induction, and gene expression of SPION@Cs-PTX-PEG-FA were estimated in fibrosarcoma cell lines, respectively. In vivo studies used BALB/c tumor-bearing mice. The results showed that SPION@Cs-PTX-PEG-FA exhibited suitable physical stability, spherical shape, desirable size, and charge. SPION@Cs-PTX-PEG-FA inhibited proliferation and induced apoptosis of cancer cells (P < 0.01). The results of the in vivo study showed that SPION@Cs-PTX-PEG-FA significantly decreased tumor size compared to free PTX and control samples (P < 0.05), leading to longer survival, significantly increased splenocyte proliferation and IFN-γ level, and significantly decreased the level of IL-4. All of these findings indicated the potential of SPION@Cs-PTX-PEG-FA as an antitumor therapeutic agent.

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“…Several studies indicate that when solved or encapsulated in drug carriers, the solubility of ET has increased [31,32]. Multiple studies suggest that nanoparticles less than 10 nm are rapidly excreted from the clearance and/ or extravasation system, whereas larger nanoparticles are more likely to be identified and excreted by the mononuclear phagocyte system [23,33]. In most studies, the best and appropriate size for drug delivery is 10 to 250 nm in order to have a remarkable enhanced permeation and retention (EPR) effect and effective escape from physiological barriers [34,35].…”

Section: Discussionmentioning

confidence: 99%

Folate decorated dextran-coated magnetic nanoparticles for targeted delivery of ellipticine in cervical cancer cells

Abdulwahid¹,

Haider²,

Al-Musawi³

2023

Adv. Nat. Sci: Nanosci. Nanotechnol.

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The dextran-coated superparamagnetic iron oxide nanoparticles (SPIONs) grafted with foliate (FA) were prepared and used as a nanocarrier for ellipticine (ET) delivery in cervical cancer. In this work we prepared superparamagnetic iron oxide nanoparticles by pulsed laser ablation in liquid method. The formation of the SPION@DEX-ET-FA nanosystem was performed by a reverse microemulsion process. Dynamic light scattering (DLS), atomic force microscopy (AFM), and field emission scanning electron microscope (FESEM) were used to characteristic the morphological properties of the NPs. The appropriate impact of a therapeutic dose of SPION@DEX-ET-FA on both cancer and healthy cell lines was estimated using a 3- (4,5-dimethylthiazol-2-yl) -2,5-diphenyltetrazolium bromide (MTT) assay. The flow cytometry assays was used to evaluate the induction of apoptosis in Hela cervical cancer cells. The findings of the SPION@DEX-ET-FA formulated were spherical particles with an average size, polydispersity and a zeta potential of 101 ± 15.02 nm, 0.075 and −33.8 mV, respectively. The nanosystem displayed dose-dependent cytotoxic effects on Hela cells. The results showed that SPION@DEX-ET-FA retained antitumor activity and no adverse effects on healthy cells were found.

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Enhance Preparation and Characterization of Nickel-Oxide as Self-Cleaning Surfaces

Cited by 39 publications

References 28 publications

Fabrication of Porous Silicon as a Gas Sensor: The Role of Porous Silicon Surface Morphology

Fabrication of Porous Silicon as a Gas Sensor: The Role of Porous Silicon Surface Morphology

Targeted delivery of paclitaxel drug using polymer-coated magnetic nanoparticles for fibrosarcoma therapy: in vitro and in vivo studies

Folate decorated dextran-coated magnetic nanoparticles for targeted delivery of ellipticine in cervical cancer cells

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