Search results for ""Author Zacharie Bartul""

This edited compilation presents some of the latest advancements in the field of nanotechnology. Chapter One details the use of self-emulsifying drug delivery systems as a technique for improving drug solubility. Chapter Two describes a proposal for improving the efficiency of solar panels by harvesting heat energy as well as light energy. Chapter Three investigates the efficacy of a sensor composed of carbon nanotubes and other nanomaterials for detecting toxic phenolic compounds in the environment. Chapter Four studies the characteristics of a sensor prepared with low-dimensional metal oxide nanoparticles with a fast response towards Xanthine. Chapter Five compares different approaches to modelling of the kinetics of metal nanoparticles formation and analyses how these methods could be improved. Chapter Six deals with the use of heavy metal oxide nanoparticles for unsafe bio-chemical detection. Chapter Seven summarises the importance, properties and applications of carbon nanotubes as a potential superior adsorbent group. Lastly, Chapter Eight obtains the structural model of an electroelastic actuator for nanotechnology.

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This compilation opens with a discussion on the state of the art of the most representative mesostructured materials based on silicon dioxide used in diverse applications, and focusing on the synthesis, functionalization, and characterization of such materials. Following this, the authors present examples of success in using polymeric nanoparticles, as well as methods for their formation and physicochemical analysis required prior to perform safety and efficacy biological tests. Various mechanisms of silver nanoparticles contribute to their cytotoxicity, including generation of reactive oxygen species, DNA damage, and activation of signaling events leading to inflammation, apoptosis, and necrosis. As such, the authors propose that future efforts be focused on the development of less toxic silver nanoparticles. Continuing, graphene and its by-products are defined and the mechanism of electromagnetic waves absorption via graphene-based substrates and nanocomposites is presented. Various kinds of graphene-based electromagnetic shields are examined and their performances compared. Physicochemical characterizations of the nanoemulsions are performed, including analysis over a period time to monitor the maintenance of these characteristics during storage. Next, a series of topics regarding electromagnetic wave shielding theory, sample fabrication methods, and characterization of the shielding materials are presented and experimental programs reported in the literature are reviewed. In conclusion, the authors present results of investigations concerned with the impact of rhodamine-B deposition on the surface of porous silicon on the chemical composition and optical properties of this system.

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This volume includes five chapters that describe recent advances in nanotechnology research. Chapter One summarizes the progress that has been made in the past five years in the field of electrochemical sensing using nanomaterial-based electrodes and modified electrochemical platforms for the determination of drugs, enzymes, cancer markers, hormones, nucleic acids, vitamins, and different environmental pollutants such as pesticides, chemical warfare reagents, phenolic compounds, heavy metal ions and other inorganic anions. Chapter Two reviews the modification of a semiconductor's surface by metal nanostructures by galvanic replacement method. Chapter Three explores the influence of stoichiometry over the electronic structure of vanadium oxides in terms of V-V and V-O orbitals hybridisation and highlights the spectroscopic trends. Chapter Four employs electrochemical impedance spectroscopy, potentiodynamic polarization and salt spray tests to investigate the anticorrosive properties of nanocomposite coatings. Lastly, Chapter Five investigates the potential of electrospun nanofibers capable of chromium (VI) removal in wastewater treatment.

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The first chapter discusses the three major types of nanocomposites: metal, polymer, and ceramic matrix. Characteristics of different types of nanocomposites and their potential applications are presented briefly as well. Following this, the authors examine the increasing use of engineered nanomaterials in consumer and industrial products that has aroused global concern regarding their fate in biological systems, resulting in a demand for parallel risk assessment. This compilation also contains numerous approaches for targeted drug delivery systems using various options, particularly those involving the incorporation of nanocomposite materials. The basics on the Hubbard model in 1D and 2D and its applications in work on nanomaterials is presented. These applications concern electrical transport properties and optical properties of nanomaterials. The authors provide a review of recent research on the effect of various polymers incorporation in thin films on optical, structural, electrochemical and other properties of thin films. An overview of biocompatible and biodegradable polymer based bone scaffold materials is provided, along with their synthesis, characterisation, applications, advantages and short comings in the field of biomedical engineering application. Besides the effect of porosity, pore size, interconnectivity, microstructure of the scaffold on bone tissue engineering are evaluated in this section. Later, the generalized structural-parametric model, the solution of the matrix equations of the multilayer electroelastic actuator for the mechatronics and the nanotechnology and the calculation their transfer functions are presented by the authors. The concluding chapter assesses some common multiscale methods developed while stating some of the computational merits in multiscale simulations compared to large-scale atomistic simulations.

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