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In recent years, vanadium pentoxide (V2O5) nanoparticles (NPs) have attracted considerable interest due to their potential medicinal applications, including cancer therapy, antibiotic resistance and antibacterial activity. Manufacturing V2O5 NPs is a crucial step in developing these applications, and laser ablation in solution has proven to be a particularly successful technique. Following fabrication, colloidal solutions were analyzed using ultraviolet–visible (UV–Vis) absorption spectra, Fourier transform infrared (FTIR) spectrum, transmission electron microscopy (TEM) and X-ray diffraction (XRD). In this work, XRD study revealed that the produced NPs had an orthorhombic phase. Based on the laser energy, nanosized vanadium pentoxide particles were created by laser irradiating a vanadium bulk submerged in a double deionized water (DDW), resulting in spherical particles with average sizes ranging from 15.4 to 33.8 nm, as shown by TEM micrographs. Conforming to the quantum size concept, the bandgap energy of V2O5 NPs is higher than that of bulk V2O5 due to the decrease in particle size. This study examined the effectiveness of V2O5 NPs against pathogenic bacterial strains Staphylococcus aureus as Gram's positive bacteria and Escherichia coli as negative Gram's bacteria. Then, we evaluated anticancer activity of V2O5 NPs against a breast cancer cell line (MCF-7 cells) using MTT assay. The results reveal that the activity of prepared V2O5 NPs against S. aureus is greater than that of E. coli. The findings suggest that prepared NPs can act as an anti-proliferative agent against MCF-7 cells. Subsequently, the produced NPs might be exploited as a future strategy for other biomedical applications. [ABSTRACT FROM AUTHOR]

In this study, we used the pulsed laser ablation (PLA) method to make Au:MgO nanoparticles on porous silicon (PS) substrates. The optical characteristics, crystallinity and surface morphology of generated Au:MgO nanoparticles have been investigated with utilizing XRD, TEM, AFM, UV–Vis, PL and fabrication of gas sensors examined at various laser energies. Au:MgO nanoparticles have been manufactured by pulsed laser ablation method (Q-switched) fundamental 1064-nm Nd:YAG, at different laser energies 600, 800 and 1000 mJ and 100 shots, and then sedimentation on surface of PS (porous silicon) layer prepared by photoelectrochemical etching method. The properties of samples are analyzed by XRD (X-ray diffraction), AFM (atomic force microscope) and TEM (transmission electron microscope). The prepared samples were spherical nanoparticles with an average of roughness and diameter 13.4 and 36.76 nm. The production of approximately spherical core- shell of Au:MgO NPs is indicated by TEM with a mean particle size of 10–55 nm. Also the face cubic-centered shape of Au:MgO NPs is revealed by XRD. Eventually, the diversity of running temperature on the sensor sensitivity, recovery times and the time of response for NO2 and H2S gas sensors fabricated from prepared specimens was studied. The maximal sensitivity of Au:MgO NPs/PS excised by laser energy of 800 mJ of NO2 gas was evaluated as 41.1%, while the maximal sensitivity of Au:MgO NPs/PS excised with a pulsed laser of 1000 mJ of H2S gas is much greater compared to NO2 gas. [ABSTRACT FROM AUTHOR]

In this study, the properties of the porous silicon (PS) photodetector were improved by depositing Au@In2O3 (core-shell) nanoparticles on the surface of PS. The Au@In2O3 NPs were prepared using the pulsed laser ablation in liquid (PLAL) technique at different laser energies of 500, 700, and 900 mJ, using a Nd:YAG laser with a wavelength of 1064 nm. The PS was prepared using the electrochemical etching (ECE) method, with an etching current density of 20 mA/cm2, an etching time of 15 min, and a hydrofluoric acid concentration of 25%. Structural, morphological, optical, and electrical measurements of the PS, Au@In2O3 NPs, and Au@In2O3 NPs/PS were conducted using the X-ray diffraction (XRD) test, field-emission scanning electron microscopy (FE-SEM) analysis, photoluminescence (PL), and UV-vis spectroscopy showed the highest peak of absorbance at 327–385 nm, and the photoluminescence (PL) peak of Au@In2O3 NPs was in the visible range show broad band and splitting for 399.5 nm for In2O3 NPs and 469 nm for Au NPs, while the PS peak was at about 561.8 nm. As a result, the photodetectors device system exhibited high responsivity (Rλ) and quantum efficiency in the visible area, the higher responsivity of the Au@In2O3 NPs/PS photodetector was measured as 0.1450 A/W for specimens prepared at a laser energy of 500 mJ/pulse. [ABSTRACT FROM AUTHOR]

The purpose of this study is to explore if nanostructured Au–TiO2 particles can replace traditional, bulkier materials in gas sensing applications. Then use a Nd-YAG laser with a wavelength of 1064 nm, number of shot 500 pulse, and 500 mJ, 660 mJ, and 820 mJ laser ablated energy, the pulsed laser deposition technique has been widely used to prepare and characterize Au–TiO2 nanoparticles on Porous Silicon substrate produced on n-type Silicon wafer. By using of drop casting method, the Au–TiO2 NPs have deposited on porous silicon (PS) layer with 15 drops of each specimen. The morphology of PS layer, Au:TiO2 NPs and Au–TiO2 NPs/PS specimens were reviewed using scanning electron microscopy, XRD pattern analysis, and transmission electron microscopy. We found that the Au:TiO2 NPs play important role to develop electrical properties and sensitivity to H2S and NO2. [ABSTRACT FROM AUTHOR]

In this study, a novel, simple method has been used for fabricated of Au:TiO2 nanoparticles. The manufacture consisted of two steps: first, ablating a gold (Au) target immersed in CTAB solution to produce colloidal Au NPs and then inserting a titanium (Ti) target in the solution to prepare Au:TiO2 NPs via laser ablation in liquid (LAL) at various laser energies. Then, it was placed on porous-Si (PS). PS is made by etching n-type crystalline c-Si wafers by photo-electrochemical etching (PECE). The XRD, TEM, AFM, PL analyses were employed to characterize the samples. Lastly, the impact of varying operation temperature of hydrogen sulfide (H2S) and nitrogen dioxide (NO2) gas sensors fabricated from prepared specimens on the sensors sensitivity, response time, and time to recover was explored. We found the greatest sensitivity of Au:TiO2 NPs/PS when ablated at 1000 mJ. The synthesized Au/TiO2 NPs thin films show high sensitivity 94.12% and 42.69% with fast response and recovery of H2S and NO2 gas at for low concentration 12.6 and 64.5 ppm, respectively. [ABSTRACT FROM AUTHOR]

Nanomaterials can be employed in various medicinal industries because of their unique characteristics versus bulk materials. Nanosized particles of Titanium dioxide were fabricated using the laser irradiation technique in this work. After production, the physical properties of Titanium dioxide were identified by Ultraviolet–visible (UV–Vis) spectroscopy, Fourier transform infrared (FTIR) spectrum, X-ray diffraction, FTIR, and Transmission electron microscopy (TEM) techniques. Regarding TEM micrographs with various laser energies, the nanoparticles exhibit a spherical appearance, with average diameters ranging from 19 nm to 26 nm based on the laser energy. X-ray diffraction results from combined Anatase and Rutile crystal structures in the prepared nanoparticles to indicate the production of Titanium dioxide nanoparticles. The FTIR analysis showed that the O-Ti-O mode includes a peak at approximately 480–550 cm − 1 . In this study, the antibacterial efficacy of Titanium dioxide nanoparticles was investigated against Staphylococcus aureus and Escherichia coli, as well as anticancer assay against prostate cancer cell line (PC-3 cells). The result shows that the effectiveness of prepared nanoparticles against S. aureus is more significant than that in E. coli, and the findings indicate the ability of prepared nanoparticles as an antiproliferative agent against PC-3 cells. In conclusion, the prepared nanoparticles could be used as a future strategy for further biomedical applications. [ABSTRACT FROM AUTHOR]

In this work, palladium nanoparticles (Pd NPs) are synthesized by laser ablation in liquid (PLAL) with wavelength 532 nm (second harmonic Nd:YAG laser) at different laser energies 360, 660, and 800 mJ with 200 pulses and an electric coil is used to generate a magnetic field. The resulting nanosolution was deposited on the previously prepared PS. The morphological and structural properties of the prepared substrates (Pd NPs/PS) are calculated by X-ray diffraction (XRD) pattern, Atomic Force Microscope (AFM), and Transmission Electron Microscopy (TEM). Their results showed that with the increase in the energy of laser pulse, the average particle size was 30.73, 22.60, and 18.01 nm. Optical properties of Photoluminescence (PL) spectra show decrease of energy band gap at 2.38, 2.43, and 2.47 eV with an increase in the energy. The sensitivity of application samples Pd NPs/PS/Si gas sensors for NO2 and H2S gas was also investigated with respect to temperature variations. Pd NPs/PS/Si gas sensors have a maximum sensitivity of NO2 gas around 52.6% at 2 5 ∘ C for sample prepared at energy 360 mJ but the highest sensitivity of H2S gas was 31.2% at 2 5 ∘ C for energy of 660 mJ. The effects of the operating temperature on reaction and recovery durations for various laser ablation energies are also discussed. [ABSTRACT FROM AUTHOR]

In this work, palladium (Pd) nanoparticles (NPs) were synthesized using laser ablation in liquids (LAL) at laser energies of 360, 660, and 800 mJ and a laser wavelength of 1064 nm with 200 pulses per shot. The Pd nanoparticle suspension deposited on porous silicon (PS) was investigated. X-ray diffraction (XRD) was used to determine the crystal structure. Field emission-scanning electron microscopy (FE-SEM) revealed the sponge-like structure of the PS and spherical clusters of Pd NPs within it. The optical properties of the prepared solution samples were investigated by testing the absorbance between 250–850 nm, and energy gap values of ∼2.35, 2.56, and 2.75 eV were calculated for the laser energies 360, 660, and 800 mJ, respectively. The electrical properties, including I – V and I p h – V , of the Al/PS/Si/Al and Al/Pd NPs/PS/Si/Al heterojunctions were calculated from I – V measurements. The observed enhancement of the fabricated Pd NPs/PS is shown by the broad spectral response in the visible to near-infrared (vis-NIR) range. The increased spectral responsivity due to coating the PS surface with Pd NPs promotes using these nanostructures in photodetectors. [ABSTRACT FROM AUTHOR]

The aim of this research study is the effect external magnetic field on the structural, morphological, electrical and optical properties of Au@TiO2 films grown under various laser pulse energy 500, 660, and 820 mJ/pulse, as well as its potential for photodetector application. This process was carried by second harmonic 532 nm a Q-switching Nd:YAG laser. X-ray diffraction indicates the formation of a creation crystalline Au@TiO2 core shell through the existence of XRD peaks associated with Au and TiO2 NPs, with no structural changes after applying a magnetic field. In the case of applying a magnetic field, TEM demonstrates the creation of spherical Au@TiO2NPs, with reduced agglomeration and particle size from 27 to 17 nm. The optical properties revealed that the optical energy gap of Au@TiO2NPs was 3.6 eV at the B = 0 T eV, while the energy gap increased under the influence of effect of magnetic field through the process of ablation. The current–voltage characteristics of Au@TiO2/PS photodetectors were measured in the dark conditions. The maximum responsivity of the Au@TiO2/PS photodetector was 0.16 A/W at 450 nm while this responsive decreasing to 0.04 A/W after applying the magnetic field through the ablation process. Au@TiO2NPs appear to be a potential candidate for high-performance photo-detector applications. [ABSTRACT FROM AUTHOR]

Gold-titanium dioxide nanoparticles (Au-TiO2 NPs) were synthesized via pulsed Nd:YAG laser ablation in the CTAB under the influence of an external magnetic field produced. Scanning electron microscopy (SEM), X-ray diffraction (XRD), UV–Vis spectroscopy, and transmission electron microscopy (TEM) have been utilized in order to analyze Au-TiO2 NPs. The XRD pattern related to Au-TiO2 NPs indicated that they have been polycrystalline and the specimens Au-TiO2 were nanocrystalline. In the case when applying a magnetic field, spherical NPs are generated, particle agglomeration is reduced, and particle size declines from 31 to 25 nm, according to SEM. Following ablation with a magnetic field, the optical energy gap of Au-TiO2 NPs increased from 3.5 to 3.7 eV. With current density–voltage (J-V) measurements, the electrical parameters of Al/Au-TiO2/PS/Si/Al heterojunction, including the barrier height (ΦB) and ideal factor (n), were indicated. The efficiency regarding Au-TiO2/PS photodetectors has been enhanced over various wavelengths, quantum efficiency (QE) of Au-TiO2/PS photodetectors has been reduced after adding a magnetic field during the process of ablation. [ABSTRACT FROM AUTHOR]

This study presents a comprehensive look into the potential therapeutic, antibacterial, and anticancer properties of a nanocomposite (NC) of gold (Au) and zinc oxide (ZnO). In this study, we analyzed the adherence between Au nanoparticles (NPs) and ZnO NPs. X-ray diffraction analysis showed high crystallinity and small crystallite sizes of Au NPs and ZnO NPs, while transmission electron microscopy showed spherical NPs. Furthermore, histogram analysis showed that the average particle size of Au NPs is 27 nm, while that of ZnO NPs is 35 nm. The adherence of ZnO NPs on the surface of Au NPs increased their combined particle size to 51 nm and revealed a high-population core-shell structure. The activity of Au/ZnO NCs against Escherichia coli was more potent when compared to that of elemental Au and ZnO NPs alone. The cytotoxic effects of Au NPs, ZnO NPs, and Au/ZnO NCs against human breast cancer cells (AMG13) and human esophageal adenocarcinoma cancer cells (SK-GT4) were investigated in this study. We found that AMG13 is more sensitive than SK-GT4 to the activity of Au/ZnO NCs. The cytotoxicity of Au/ZnO NCs against AMG13 was 89%, while that against SK-GT4 was 85%. Less cytotoxic effects were recorded against normal cells (MCF7) when compared with those of cancer cells. Based on these findings, the synthesized Au/ZnO NCs could be used as a promising strategy for biomedical applications. [ABSTRACT FROM AUTHOR]

Colloidal nanoparticles (NPs) of Au:Cd were prepared via laser ablation in liquid with several energies of laser and then were deposited on porous-Si (PS). X-ray diffraction, scanning electron microscopy, UV - visible spectrophotometry and electrical attributes were used to characterise the obtained particles. From photodetector measurements, the spectral responsivity curves include three area; the first area represent absorption of UV light by Au:Cd NPs, the second area is due to the visible light absorption with the layer of PS and the third region to the absorption edge of the substrate Si. The higher responsivity of Au:Cd NPs/PS photodetector was found to be 2.66A/W for the sample prepared at a laser energy of 800 mJ/pulse that has the largest energy gap, and according to the quantum confinement effects, the size of NPs is smaller Thus, the surface area is greater and is also considered a major feature in improving the photodetector. [ABSTRACT FROM AUTHOR]

The pulsed laser ablation technique is a safe and eco-friendly method, this technique was used to prepare gold (Au) and zinc oxide (ZnO) in two forms, both as core:shell nanoparticles (CS NPs) and a nanocomposite (NC). The absorption behaviour for Au/ZnO NCs and Au:ZnO CS NPs was investigated the UV-visible of Au NPs peak at 525 nm whiles the peak of the ZnO NPs at 375 nm. Transmission electron microscope (TEM) images show the average size of Au NPs is 30–45 nm adhering to ZnO NPs with an average size of 55–60 nm. In Au/ZnO CSNPs, Au acts as a core while the ZnO nanoparticles produced a shell; in spherical gold nanoparticles, the average shell thickness of ZnO is 10–15 nm. As synthesised, the Au:ZnO CSNPs are endowed with high photocatalytic activity even after multiple cycles of photo-catalytic reactions when compared with Au/ZnO NCs. [ABSTRACT FROM AUTHOR]

• Synthesis of Au:CdO nanoparticles via laser ablated. • Prepared porous silicon (PS) by photo-electrochemical etching method as substrate. • Study of structural, morphological and optical for Au:CdO NPs/PS. • Fabrication of Au:CdO NPs/PS as gas sensors. Laser ablation technique in solution has been advanced to achieve single step synthesis of varied gold: oxide nanocomposites with uniform morphology and supreme dispersibility. The core:shell Au:CdO nanoparticles were manufactured by using fundamental Nd:YAG laser (1064 nm) at several energy of laser 600, 800 and 1000 mJ/100pulses, after that deposited on surface of porous-Si (PS). PS is prepared by using photo-electrochemical etching (PECE) method of n-type Si wafer in 16% hydrofluoric acid (HF).Current density 12 mA/cm2 and time of etching was 15 min. The characteristics of Au:CdO NPs that have been synthesized were studied. The structural properties were investigated using X-ray diffraction (XRD). Furthermore, the results of the AFM "atomic force microscope" test indicated a 26.34 nm surface roughness for Au:CdO NPs, TEM "transmission electron microscope) revealed that the fabricated particles of Au:CdO were spherical shape, and Photoluminescence (PL) test. Finally, the effects of different operation temperatures on the gas sensor sensitivity, recovery, and response times of NO 2 and H 2 S gas sensors which created from synthesized samples were investigated. The maximum sensitivity of Au:CdO NPS/PS ablated by energy laser 800 mJ is approximately 93.5% and 67.81% of gas H 2 S and NO 2 respectively. [ABSTRACT FROM AUTHOR]

In this study, prepared Au:ZnO core-shell nanoparticles (CSNPs) by pulse laser ablation in liquid (PLAL), and succeed to control of growth the ZnO NPs and play a role as a shell decorated on surface of Au NPs as a core. The structure, morphology and visual qualities were examined. The XRD result explained the phase of ZnO NPs was wurtzite structure, and for Au NPs as a cubic crystal. The morphology of structures illuminates the agglomerated and adherent ZnO NPs on Au NPs. TEM image is clearly show the spherical particles for Au NPs with mean size 12 ± 1 nm, and the mean size for ZnO NPs is 29 ± 2 nm, while, its clearly show increased for size of Au:ZnO CSNPs to 45 ± 2 nm. [ABSTRACT FROM AUTHOR]

In the present work, the characterization and preparation of the ZnO nano-particles (ZnO NPs) through the laser ablation in the methanol at a variety of the laser energies 400, 600 and 800 mJ, XRD analysis When the crystal size is inside a nanometer, shows a large diffraction peak, by Atomic Force Microscopic (AFM) study the surface roughness and layer homogeneity and Morphological structural, Photoluminescence (PL) test. Finally, the effect of changing the operating temperature of the gas sensors of NO 2 that have been produced from prepared samples on the sensitivity of the sensor, response time, and recovery time was investigated, with the highest sensitivity for ZnO NPs/PS, ablated with laser energy of 600 mJ on porous silicon. [ABSTRACT FROM AUTHOR]

In this study, synthesis and characterizing of Gold:Zinc Oxide (Au:ZnO) as a core:shell nanoparticles (CSNPs) has been prepared via Laser Ablation at various Laser Pulses Energy 400, 600, and 800 mJ with 200 strokes. Further confirmation of the production of Au:ZnO CSNPs by analyzing the structural and optical properties from aggregated Au:ZnO. CSNPs obtained via drop casting Au:ZnO CSNPs colloidal solutions into silicon wafers. Nanoparticles were identified via X-ray diffraction, transmission electron microscopy, Fourier transform infrared, and ultraviolet–visible absorption spectrum. It was found particle size increased with energy, and the shell of ZnO on the surface of gold nanoparticles is strongly affected on absorptions, while the absorption of Au:ZnO CSNPs decreased when the decorated surface of Au by ZnO corresponding to Au and ZnO as an individual. [ABSTRACT FROM AUTHOR]

In the present study, synthesis and characterization of Zinc Oxide (ZnO) nano-particles with the pulsed laser ablation (PLD), from a zinc metal target in methanol at a variety of the laser pulse energy values 400, 600 and 800 mJ with 200 shots and 1064 nm laser wavelength. Porous silicon (PS) layers were prepared from n-type silicon with orientation (100) by photo-electrochemical etching (PECE) method. The morphological properties of ZnO NPs deposited on PS presented a good adhesion between these nanostructures leading to improve the structural stability of the PS substrate. UV–vis–NIR spectrophotometer, X-ray diffraction (XRD), electrical characteristics and Photodetector are utilized for the characterization of the products. So the detector measurements of ZnO NPs/PS exhibited a higher responsivity (0.04 A/W). [ABSTRACT FROM AUTHOR]

In this work, synthesis and characterizing of carbon: selenium nanoparticles (C:Se NPs) are synthesized by laser ablation Q-switched Nd:YAG laser with wavelength of 1064 nm at different laser pulses energy 200, 600 and 800 mJ with 100 shots and porous silicon (PS) was presented. X-ray diffraction (XRD) was utilized for examining the structural properties. In addition, the results of the Atomic force microscope (AFM) analysis an 39.76 nm as average diameter which is coordinated in rod-like shape appearing for C:Se NPs, also the transmission electron microscope (TEM) indicated that the synthesized C:Se particles have been spherical with average particle size in range of (25 and 75) nm. Lastly, the variations of operation temperature related toNH 3 and NO 2 gas sensors that are fabricated from prepared samples on the sensor sensitivity, recover time and response time were examined, the maximum sensitivity is approximately 205% with regard to (C:Se NPs) ablated via laser energy 800 mJ on PS of gas NO 2 , also the maximum sensitivity is approximately 43% in terms of(C:Se NPs) ablated via laser energy 200 mJ on PS of gas NH 3. [ABSTRACT FROM AUTHOR]

In this work, Carbon:Selenium (C:Se) nanoparticles (NPs) are preparation by laser ablation at diverse laser energy 200, 400, 600,800 and 1000 mJ with 100 shots and laser wavelength 1064 nm then deposited on porous silicon (PS). PS are fabricated using electrochemical etching (ECE) method for p-type crystalline silicon (c-Si) wafers of (100) orientation.The pattern of X-ray diffraction (XRD) showed the sample's nanocrystaline.Results of the Atomic force microscope (AFM) analysis an average diameter of 39.76 nm coordinated in a rod-like shape appears for C:Se NPs. UV–vis result displayed that the optical energy gap of the nanoparticles increases. The electrical properties such as barrier height (Φ B) and ideality factor (n) of the Al/C:SeNPs/PS/Si/Al heterojunction were determined from the current density-voltage (J-V) measurements. [ABSTRACT FROM AUTHOR]

In this research, C:Se (core:shell) nanoparticles(NPs) are laser ablated at various laser energies of 200, 400, 600, 800 and 1000 mJ with 100shots and 1064 nm laser wavelength then deposited on porous silicon (PS). The XRD study showed that C:Se NPs are crystalline and belong to the monoclinic symmetry α-phase. Results of the AFM (i.e. atomic force microscope) analysis for PS has shown sponge-like structure, and a 39.76 nm average diameter coordinated in a rod-like shape appearing for C:Se NPs, are watched and electrical characteristics are studied to identify samples. From current-voltage (I-V) measures, the electrical characteristics, like height of the barrier (Φ B) and ideality factor (n) of Al/PS/Si/Al and Al/C:Se NPs/PS/Si/Al heterojunction have been determined. Finally, a wide variety of wavelengths has increased the efficacy of C:Se NPs/PS photodetectors. [ABSTRACT FROM AUTHOR]

Magnesium Oxide nanoparticles (MgO NPs) ablated on porous silicon (PS) substrate using Laser pulse ablation technique with different preparation conditions. The preparation samples offer sponge-like structure of PS and crystalline MgONPs structure with a bright spot inside PS. MgO NPs/PS perform improvement in the photoconversion efficiency properties, that are represented as decrease reflectivity, and enhancement in both of the responsivity and quantum efficiency. Therefore, MgONPs/PS can be used as a photodetector operated over broadband spectral of wavelength. [ABSTRACT FROM AUTHOR]

In this work, preparation and characterization of Bi 2 O 3 nanoparticles (Bi 2 O 3 NPs) by laser ablation in liquid at various laser energy 200, 400, 600 and 800 mJ. X-ray diffraction (XRD) investigation is appeared broad diffraction peak when the size of the crystal becomes inside nanometer. Scanning electron Microscopy (SEM) study results for porous silicon (PS) showed sponge like structure and Bi 2 O 3 NPs nanoparticles appear as bright spots. Observed the reflectivity of Bi 2 O 3 NPs on PS is less than Si bulk and PS, however. From Raman result show peaks at 81 cm−1 and 303 cm−1, are the specific bands of α -Bi 2 O 3. The band at 303 cm−1, are assumed to be because of Bi–O stretches. The electrical properties such as barrier height (Φ B) and ideality factor (n) of the Al/Bi 2 O 3 NPs/PS/Si/Al heterojunction were determined from the current–voltage (I-V) measurements. Finally, the variation of operation temperature of NO 2 gas sensors which fabricated from the prepared samples on sensor sensitivity, response time and recover time have been studied, and the maximum sensitivity was about 71 % for Bi 2 O 3 NPs ablated by laser energy 600 mJ on PS. [ABSTRACT FROM AUTHOR]

In this work, bismuth oxide nanoparticles (Bi 2 O 3 NPs) are preparation by laser ablation at diverse laser energy 200, 400, 600 and 800 mJ with 100 shots and laser wavelength 1064 nm then deposited on porous silicon (PS). X-ray diffraction (XRD) study revealed that Bi 2 O 3 NPs is crystalline and belong to α-phase with monoclinic symmetry. Atomic force microscope (AFM) study results for PS showed sponge like structure, and for Bi 2 O 3 NPs appears an average diameter of 31.09 nm coordinated in a rod-like shape, are watching and electrical properties are carried out to describe the samples. Fourier Transform Infrared (FTIR) spectra showed the oxidation of PS substrate resulting in the passivating of the surface states and for Bi 2 O 3 NPs/PS confirming the presence of Bi-O bond. The electrical properties such as barrier height (Φ B) and ideal factor (n) of the Al/PS/Si/Al and Al/Bi 2 O 3 NPs/PS/Si/Al heterojunction were calculated from the current–voltage (I-V) measurements. Finally, we appeared enhanced effectiveness of Bi 2 O 3 NPs/PS photodetectors through a wide domain of wavelengths. [ABSTRACT FROM AUTHOR]