Showing papers by "Yasir Jamil published in 2020"

Functionalized cobalt ferrite cubes: toxicity, interactions and mineralization into ferritin proteins

Abstract: In the biological environment, the fate of nanomaterials characterizes as critical matter, which regulates environmental effects and associated hazards for humans. Understanding of the nanoparticle’s degradation, transformations and persistence may predict these risks. Safely designed inorganic nanomaterials are being focused for therapy; yet, fundamental processing in the biological environment and physical properties have not been assessed thoroughly. In this research work, bare, polyethylene glycol and citrate-coated cobalt ferrite nanoparticles (NPs) are prepared through modified chemical coprecipitation method. Structural, elemental, magnetic and morphological analysis of synthesized samples are performed through XRD, EDX, FTIR, VSM, SEM and TEM. XRD confirms the cubic structure of CoFe2O4 with crystallite size 25.75 nm. SEM and TEM confirm the formation of faceted cube-like morphology. For in vivo toxicity studies, a single dose of bare and coated cobalt ferrite NPs are intraperitoneally administrated in healthy albino rats. The degradation effects are studied through optical follow-up, by introducing bare and coated NPs in lysosomal-like media where changes in behavior are linked with transformations in vivo. Transfer of degraded ions of cobalt ferrite NPs into apoferritin are also evaluated. Apoferritin studies reveal partial filling of protein with cobalt ions from cobalt ferrite NPs.

Photovoltaic-Based Nanomaterials: Synthesis and Characterization

Abstract: Improving the conversion efficiency and reducing cost are the major tasks to make more energy competitive-based photovoltaics and able to replace the traditional fossil energies. In organic/inorganic-based solar cell development, nanotechnology seems to be the most promising branch. Nanostructure materials with large band gap synthesized from III–V and II–VI elements are gaining more attention because of their potential use in emerging energy applications. Nanostructures with different morphologies including nanowires, nanosprings, nanobelts and nanocombs can be prepared. Variations in atomic arrangements to minimize the effect of electrostatic energies produces from different ionic charges on the polar surfaces are the major reason of diversified range of nanostructures. In this book chapter, we will focus on the contribution of different nanomaterials in the advancement of solar cell technology.

In-situ approach for the synthesis of bromide-bridged mercury(II) N-heterocyclic carbene complexes

Abstract: The study was designed to synthesize bromide-bridged mercury(II) symmetric and non-symmetric N-heterocyclic carbene complexes. The preparation of benzimidazolium salts (4–6) was accomplished by sym...

Thermal Response of Iron Oxide and Metal-Based Iron Oxide Nanoparticles for Magnetic Hyperthermia

Abstract: Magnetic nanoparticles have been extensively in the biomedical field as drug delivery agent, diagnosis of different diseases and more recently in the treatment of different types of cancer. Majority of these studies reported the use of iron oxide nanoparticles or formulation contains at least iron in most of magnetic-based nanosystems. Focus on iron oxide nanoparticles is mainly due to their superparamagnetic nature at nanoscale and other features such as higher surface to volume ratio, biocompatibility and low toxicity. For further improvement in their properties, doping with different transition metal elements is also under investigations. This chapter covers most commonly used types of iron oxide NPs, behavior with few doping metals in iron oxide nanoparticles and their synthesis protocols through different physical and chemical methods. Finally, heat generation mechanisms responsible for localized heat in tissues have been discussed.