Mohammed Ali Dheyab

University of Science Malaysia | USM · School of Physics

The green and eco-friendly synthesis of gold nanoparticles (AuNPs) from renewable resources such as plants, algae, fungi, and bacteria has recently gained interest due to its use of sustainable feedstocks. This review presents an in-depth exploration of AuNP synthesis methods and their applications in cancer imaging and therapy. We examine the mech...

Recent advancements in medical dosimetry have significantly improved the precision and effectiveness of radiation therapy by accurately quantifying absorbed doses from ionizing radiation. In the past, conventional one-dimensional and two-dimensional dosimeters were commonly used, but recent years have seen a surge in interest in 3D dosimeters for c...

The green synthesis of metal nanoparticles (NPs) using plant derivatives and microbial organisms has emerged as a significant avenue for sustainable materials science. This review provides an overview of eco-friendly methods for synthesizing metal NPs, particularly emphasizing their synthesis from plant biomass using rapid and environmentally frien...

Recently there has been a continuous rise in research work on biopolymer-based nanocomposite films in active food packaging regimes. Moreover, it has been well established that bio-based polymers are more favorable than conventional ones. To improve the physical properties and exert functional properties in bio-based packaging systems, nanofillers...

Silver nanoparticles (AgNPs) are widely utilized in biomedical and antibacterial fields. However, their use poses a risk and danger of Ag⁺ absorption into human tissue via skin penetration. This study focuses on the facile and eco-friendly approach to synthesizing uniformly distributed and spherically shaped phenol capped AgNPs using Agaricus bispo...

The use of fresh plant species for biosynthesis of inorganic gold nanoparticles (AuNPs) can be an alternative to substituting the extensive use of many hazardous chemicals commonly used during NPs synthesis, thereby reducing biological impacts caused by the release of these products into the natural environment. The present study addresses the rapi...

Introduction: The depth of laser light penetration into tissue is a critical factor in determining the effectiveness of photodynamic therapy (PDT). However, the optimal laser light penetration depth necessary for achieving maximum therapeutic outcomes in PDT remains unclear. This study aimed to assess the effectiveness of laser light penetration de...

INTRODUCTION: Industrial applications of lentil (LP) and quinoa (QP) proteins are limited due to their relatively poor water solubility. In this study, a combination of protein-protein interaction (PPI) and fermentation was used to improve the functionality and nutritional value of LP by conjugating them with QP. The reaction conditions between LP...

The increasing bacterial resistance and negative impacts of the present antibacterial agents have led to the search for novel antibacterial agents. This study focuses on the influence of synthetic methods on the aggregation stability and antibacterial activity of gold nanoparticles (NPs) prepared by using sodium citrate as a reducing and capping ag...

The incorporation of additional functional groups such as bismuth nanoparticles (Bi NPs) into magnetite nanoparticles (Fe3O4 NPs) is critical for their properties modification, stabilization, and multi-functionalization in biomedical applications. In this work, ultrasound has rapidly modified iron oxide (Fe3O4) NPs via incorporating their surface t...

Highly nutritious lentil proteins (LP) have recently attracted interest in the food industry. However, due to their low solubility, extensive application of LP is severely limited. This study describes a new and successful method for overcoming this challenge by improving the nutritional–functional properties of LP, particularly their solubility an...

Background Gold nanoparticles (Au NPs) are regarded as potential agents that enhance the radiosensitivity of tumor cells for theranostic applications. To elucidate the biological mechanisms of radiation dose enhancement effects of Au NPs as well as DNA damage attributable to the inclusion of Au NPs, Monte Carlo (MC) simulations have been deployed i...

AuNPs-mediated photothermal therapy (PTT) is gaining popularity in both laboratory research and medical applications. It has proven clear advantages in breast cancer therapy over conventional thermal ablation because of its easily-tuned features of irradiation light with inside hyperthermia ability. Notwithstanding this significant progress, the th...

The varied radiological applications of tissue equivalent (TE) materials encompass quality checks, diagnostic imaging and dose evaluations. Nevertheless, the availability of compounds representative of paediatric patient tissues for scientific use in lower diagnostic photon energy spectra is limited. In this study, several TE substitutes were devel...

Modifying the surface properties of superparamagnetic magnetite nanoparticles (SPMNPs) is essential for their stabilization and functionalization in biomedical applications. This study explored the use of Sumac (Rhus coriaria) plant extract as a green stabilizer for SPMNPs. Herein, we fabricated the aqueous colloidal suspension of SPMNPs via a faci...

Chest radiographic (CXR) and chest computed tomography (CT) scans have been used to diagnose coronavirus (COVID-19) disease as an important counterpart to the reverse transcription polymerase chain reaction (RT-PCR) diagnostic protocol. This work explores the application of CXR and CT scans as diagnostic instruments for COVID-19. Numerous databases...

Abstract: Gold nanoparticles (AuNPs) are becoming increasingly popular as drug carriers due to their unique properties such as size tenability, multivalency, low toxicity and biocompatibility. AuNPs have physical features that distinguish them from bulk materials, small molecules and other nanoscale particles. Their unique combination of characteri...

Current environmental concerns fostered a strong interest in extracting polymers from renewable feedstocks. Chitosan, a second most abundant polysaccharide after cellulose, may prove to be a promising green material owing to its renewability, inherent biodegradablity, natural availability, non-toxicity, and ease of modification. This review is inte...

The present study focuses on a facile and environmentally friendly process to synthesize uniformly cubic-shaped silver nanoparticles (AgNPs) with ultrasonic assist in a short time. The phenolic compounds isolated from edible mushroom (Agaricus bisporus) were employed in the mycosynthesis of cubic AgNPs for antibacterial properties. Here, for the fi...

Nanotechnology has become the most promising research area with its critical application in all science fields. Tin oxide nanoparticles (SnO2NPs) have gained much interest in recent years because of its intriguing characteristics, which have been enhanced by producing this material in the nanoscale range. SnO2NPs showed their effectiveness in vario...

Upconversion (UC) of lanthanide-doped nanostructure has the unique ability to convert low energy infrared (IR) light to high energy photons, which has significant potential for energy conversion applications. This review concisely discusses the basic concepts and fundamental theories of lanthanide nanostructures, synthesis techniques, and enhanceme...

Vertically aligned Al-doped ZnO nanorods (AZO-NRs) were grown on glass substrate using a chemical bath depo-sition (CBD) method at various temperatures between 80 • C and 130 • C. The results showed the Al content in the AZO-NRs strongly depends on the growth temperature. The optimum doping level was attained at 110 • C. The morphology was maintain...

In this work, silver nanoparticles have been mycofabricated from Picoa sp. (a desert truffle) for the first time. Also, the antifungal activity of Picoa-AgNPs has been investigated against three pathogenic fungi, including Pythium sp., Aspergillus flavus, and Aspergillus niger, which can cause severe damage to health and agriculture. Morphology and...

This study is a new attempt to synthesize gold nanoparticles (AuNPs) using the extract of fresh mature fruits of the Iraqi Prosopis farcta plant (Fabaceae). The synthesis has been performed under infrared (IR) irradiation treatment and compared with the heating procedure at 90 °C. P. farcta-AuNPs has been investigated as a nanocatalyst to remove Me...

Combining iron oxide nanoparticles (Fe3O4 NPs) and gold nanoparticles (Au NPs) in one nanostructure is a promising technique for various applications. Fe3O4 NPs have special supermagnetic attributes that allow them to be applied in different areas, and Au NPs stand out in biomaterials due to their oxidation resistance, chemical stability, and uniqu...

Vertically aligned Al-doped ZnO nanorods (AZO-NRs) were grown on glass substrate using a chemical bath deposition (CBD) method at various temperatures between 80°C and 130°C. The results showed the Al content in the AZO-NRs strongly depends on the growth temperature. The optimum doping level was attained at 110°C. The morphology was maintained in e...

Background: Diagnostic ultrasound or sonography is an image which can provide valuable information for diagnosing and treating a variety of diseases and conditions. This experiment was done to check the performance and evaluate the ultrasonic imaging system. There were three tests performed in this experiment: dead zone (transducer ring-down), ver...

Computed tomography (CT) imaging can be enhanced with the use of contrast agents. However, the conventionally used clinical small-molecule agents (Omnipaque) are encumbered by an array of constraints that include potentially toxic and unwanted side effects. Therefore, this study presents a facile plant-assisted synthesis of platinum nanoparticles (...

Sonochemistry uses ultrasound to improve or modify chemical reactions. Sonochemistry occurs when the ultrasound causes chemical effects on the reaction system, such as the formation of free radicals, that intensify the reaction. Many studies have investigated the synthesis of nanomaterials by the sonochemical method, but there is still very limited...

This paper reports the effects of low energy X-ray irradiation doses on the structures, morphologies and absorbance of some colloidal gold nanoparticles (AuNPs) produced in distilled water via the one-step pulse laser ablation in liquid (PLAL) method. An Nd:YAG pulse laser (wavelength of 1064 nm and fluence ranges of 0.076–7.692 J/cm2) was used to...

COVID-19 is a major health threat across the globe, which causes severe acute respiratory syndrome (SARS), and it is highly contagious with significant mortality. In this study, we conduct a scenario analysis for COVID-19 in Malaysia using a simple universality class of the SIR system and extensions thereof (i.e., the inclusion of temporary immunit...

The 2019 novel coronavirus (2019-nCoV; severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)) has witnessed a rapid and global proliferation since its early identification in patients with severe pneumonia in Wuhan, China. As of 27th May 2020, 2019-nCoV cases have risen to >5 million, with confirmed deaths of 350,000. However, Coronavirus di...

Gold nanoparticles (AuNPs) can be easily synthesised using several methods for various applications in the industrial and medical sectors. However, their performance as a catalyst has not yet to be appropriately studied and optimised due to large size distribution and high agglomeration property. In this work, AuNP were synthesized by a sonochemica...

Platinum nanoparticles (Pt NPs) with excellent physicochemical properties have been produced using various techniques, including sonochemistry method. However, the effect of solvent type on the irradiation power and structure, morphology and colloidal stability of Pt NPs synthesized via sonication has received less attention. In this work, Pt NPs w...

The production of nanomaterials integrating diagnostic and therapeutic roles within a one nanoplatform is incredibly important for medical applications. Such theranostics nanoplatforms can provide additional information on each imaging modality with accurate diagnosis and, at the same time, can eradicate cancer cells. Fe3O4@Au [email protected] nan...

Gold nanoparticles (AuNPs) have numerous usage in various applications, primarily in chemical and biological sensing. There are also various methods of producing AuNPs. However, in some of those methods, removing excess reagents, including ions or residual surfactants, can be difficult and timeconsuming, while the functionalization of AuNPs with ot...

This study presents a new, facile and fast strategy to synthesize platinum nanoparticles (Pt NPs) in methanol under ultrasonic irradiation. Here, for the first time, methanol was used to reduce Pt 2+ to Pt 0 in the absence of a reductive and surfactant. The hydroxyl free radical (OH•) liberated from methanol under the sonication effect facilitates...

Featured Application: One of the applications of AuNPs in nanomedicine is treating cancer cells by Hyperthermia. Therefore, we suggest a future in vivo and in vitro studies to confirm the potential of AuNPs as a promising candidate for medical applications. Abstract: One of the most widely used modalities of clinical imaging is computed tomography...

Pt nanoparticles (NPs) are successfully synthesized via sonochemically assisted green synthesis by using Prosopis farcta fruit extract (P. farcta) as a reducing agent and stabilizer. The synthesized Pt NPs are fully characterized to confirm the morphology, structure, colloidal stability, and biocompatibility. These Pt NPs exhibit excellent physicoc...

Platinum nanoparticles (Pt NPs) have attracted interest in catalysis and biomedical applications due to their unique structural, optical, and catalytic properties. However, the conventional synthesis of Pt NPs using the chemical and physical methods is constrained by the use of harmful and costly chemicals, intricate preparation requirement, and hi...

A highly stable and magnetized citric acid (CA)-functionalized iron oxide aqueous colloidal solution (Fe3O4@CA) was synthesized by using a simple and rapid method of one-step co-participation via a chemical reaction between Fe³⁺ and Fe²⁺ in a NaOH solution at 65 °C, followed by CA addition to functionalize the Fe3O4 surface in 25 min. The NPs were...

This study is the first report on the usage of fresh fruiting bodies of Enoki mushroom (Flammulina velutipes) as a new green reducer agent incorporated in the mycosynthesis of gold nanoparticles. The mycosynthesized AuNP was characterized for its physical and chemical properties using optical observation, UV-Vis spectrometer, FESEM, AFM, DLS, XRD,...

This research is the first attempt on using fruitbodies of Portabello mushroom (Agaricus bisporus) as a newly mycoreducer agent used in the myco-synthesis of gold nanoparticles (AuNPs). The biosynthesized AuNPs were described for their chemical and physical characteristics by UV-Vis spectra, the change in color, AFM, FESEM, XRD, Zeta Potential, DLS...

Platinum nanoparticles (Pt NPs) were synthesized, through sonochemical and conventional methods, using the extract from Prosopis farcta fruits (PFFs) as a reducing agent and stabilizer. The structure, morphology and colloidal stability of Pt NPs synthesized by both methods were characterized and compared. A Vibra-Cell ultrasonic solid horn with tip...

Iron oxide nanoparticles (Fe3O4 NPs) possess unique physicochemical properties which make them great for biomedical applications. This study reports the development of gold (Au) coated Fe3O4 (Au-Fe3O4 NPs) for photothermal therapy to eradicate breast cancer cells (MCF-7). The spherical shape of monodisperse Au-Fe3O4 NPs with an average size of 20.8...

Colloidal nanoparticles (NPs) interact with biological fluids such as human plasma to form a protein coating (corona) on the surface of NPs (NP-protein complex). However, the impact of size and type of NPs on binding of the hard corona to the surface of NPs as well as damping of their optical spectra has not been systematically explored. To elucida...

This work aims to find a new green reducer agent for synthesis gold nanoparticles (AuNPs). Fresh fruiting bodies of shiitake mushroom (Lentinula edodes) were used to mycosynthesize AuNPs, which were characterized using change in color, UV-Visible, FE-SEM, AFM, Zetasizer, Zeta Potential, XRD, EDX, and FTIR analyses. The purple color is a sign of bio...

Sonochemical synthesis (sonochemistry) is one of the most effective techniques of breaking down large clusters of nanoparticles (NPs) into smaller clusters or even individual NPs, which ensures their dispersibility (stability) in a solution over a long duration. This paper demonstrates the potential of sonochemistry becoming a valuable tool for the...

This detailed review presents an overview of current research on the synthesis, surface modification, and applications of Iron oxide (Fe3O4) nanoparticles and iron oxide/gold (Fe3O4/Au) nanocomposites. The different synthesis techniques of Fe3O4 with various basic organic and inorganic modifications are presented. The applicability and role of inor...

The main objective in this discussion is to investigate the role of metal additives in In2O3 to detect the toxic gases. Ag-In2O3 nano composite thin films were grown by electron beam evaporation. In2O3:Ag nano composite thin films were deposited on quartz substrate by electron beam evaporation technique at a substrate temperature of 350°C, with dep...