Author: Afnan Qurban Shaikh
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: John Alexander
Publisher: Springer
ISBN: 3319342290
Category : Technology & Engineering
Languages : en
Pages : 366

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Book Description
This outstanding thesis provides a wide-ranging overview of the growth of titanium dioxide thin films and its use in photo-electrochemicals such as water splitting. The context for water splitting is introduced with the theory of semiconductor-liquid junctions, which are dealt with in detail. In particular plasmonic enhancement of TiO2 by the addition of gold nanoparticles is considered in depth, including a thorough and critical review of the literature, which discusses the possible mechanisms that may be at work. Plasmonic enhancement is demonstrated with gold nanoparticles on Nb-doped TiO2. Finally, the use of temperature and pressure to control the phase and morphology of thin films grown by pulsed laser deposition is presented.

Author: Rathnapala S. Vithanage
Publisher:
ISBN:
Category : Electrochemistry
Languages : en
Pages : 412

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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Andrzej Zieliński
Publisher:
ISBN: 9783036507378
Category :
Languages : en
Pages : 176

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Book Description
This e-book presents a selection of papers focused on some novel aspects of electrodeposited coatings, in particular for medical applications. The biocoatings applied for surface modification of load-bearing implants are still being developed, especially for titanium implants, for which hundreds and thousands of possible technical solutions have been proposed using different techniques and materials. This book is a collection of papers that demonstrate appropriate attempts using various electrodeposition methods. The specific objectives are different, with several looking for improved bioactivity, another for antibacterial properties, and another for increased adhesion on the helix lines on dental implants. The e-book starts with a paper on the methodic development of electrodes for electrowinning. This is followed by paper on the real performance of the surface of dental implants, a subject not often addressed. The next paper focuses on electro-oxidation: a novel two-stage oxidation method, characteristic of the oxide layer on helix line of a model dental implant, and micro-arc oxidation of 3D printed titanium. The last paper focuses on coatings, describing the carbon nanotubes- (hydroxyapatite, chitosan), Eudragit-, and Fe-containing coatings. The e-book concludes with a review of all electrodeposition methods. It is a collection of papers describing novel results in electrodeposition biocoatings, which will be of interest for many scholars and researchers.

Author: Michael J. Avaltroni
Publisher:
ISBN:
Category :
Languages : en
Pages : 268

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Author: Wisanu Boonrawd
Publisher:
ISBN:
Category : Biomedical engineering
Languages : en
Pages : 104

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Book Description
Electrolytic plasma processing (EPP) can be operated in two modes, namely plasma electrolytic saturation (PES) and plasma electrolytic oxidation (PEO). In this study, the PES was used to create hydrophilic surface profiles on titanium (Ti). The wettability, surface morphology characteristics and chemical composition of the treated samples were studi650ed as a function of PES processing parameters. The PES profiled surfaces comprised of a characteristic "hills and valleys" morphology because of continuous surface melting and freezing cycles. A bimodal surface profile was produced with 2-3 μm height hills and valleys with nano-roughness (≤ 200 nm). The produced profile resulted in a significant contact angle decrease (from 38.7° to 5.4°). Ratios of actual surface area to projection area (r) and fraction of solid surface remaining dry (j) were obtained from profilometry. The surface characteristics and large r values produced by PES were able to induce hemi-wicking. Hence, PES produced superhydrophilic surfaces on Ti. The bioactivity of PES treated Ti was evaluated using cell free and MC3T3 cells in-vitro studies. The treatedi surface significantly increased the bioactivity and formed stoichiometric hydroxyapatite after immersion in a bone cell culture medium for 21 days. Cells' attachment and proliferation studies indicated that PES treated surface significantly enhances the cells' adhesion and growth after 24 and 48 hr compared to the untreated surface. The results show that Ti surface profiling by PES constitutes a promising method to potentially improve bone implant bonding. PEO was used to produce titanium oxide (TiO2) coatings on Ti surface in potassium -phosphate electrolyte. The morphology, wettability, phase, and chemical compositions were studied as a function of processing parameters. The bioactivity of the coating was assessed by the ability to form biomimetic apatite in-vitro using cell culture medium. In-vitro studies using human mesenchymal stem cells were also conducted to evaluate cells' proliferation and viability of the treated Ti. The results revealed that the produced TiO2 coatings comprised pore features with the pore size increasing with applied current density and treatment duration due to high energy discharge channels at higher potential. The PEO treated Ti exhibited superhydrophilic characteristics with a contact angle

Author: Vineet Kumar
Publisher: CRC Press
ISBN: 1000367207
Category : Technology & Engineering
Languages : en
Pages : 603

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Book Description
Nanomaterials contain some unique properties due to their nanometric size and surface functionalization. Nanomaterial functionalization also affects their compatibility to biocompatibility and toxicity behaviors. environment and living organism. This makes functionalized nanomaterials a material with huge scope and few challenges. This book provides detailed information about the nanomaterial functionalization and their application. Recent advancements, challenges and opportunities in the preparation and applications of functionalized nanomaterials are also highlighted. This book can serve as a reference book for scientific investigators, doctoral and post-doctoral scholars; undergrad and grad. This book is very useful for multidisciplinary researchers, industry personnel’s, journalists, and policy makers. Features: Covers all aspects of Nanomaterial functionalization and its applications Describes and methods of functionalized nanomaterials synthesis for different applications Discusses the challenges, recent findings, and cutting-edge global research trends on functionalization of nanomaterials and its applications It discusses the regulatory frameworks for the safe use of functionalized nanomaterials. It contains contributions from international experts from multiple disciplines.

Author: Dieter M. Gruen
Publisher: Springer Science & Business Media
ISBN: 9781402033216
Category : Science
Languages : en
Pages : 420

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Book Description
Ultrananocrystalline diamond (UNCD) is one of the important members of the triad of nanostructured carbons, which includes fullerenes and nanotubes. UNCD with characteristic sizes of primary particles less than 10 nm occurs in two forms: as a dispersed powder made by detonation techniques and as a chemical vapor deposited film. This book for the first time combines results of research pursued by the two communities of scientists, which up to now, have been working rather independently and largely unaware of the vast synergistic relationships existing between them. It is particularly noteworthy that much of the Russian work on disperse UNCD is available here in English for the first time. The outstanding experts in the two fields are represented in this volume discussing the basic theoretical concepts underlying the synthesis and characterization of these nanomaterials and describing progress that has been made in several areas of applications such as nanocomposites, selective adsorbents, colloidal suspensions, microabrasives, lubricants, quantum dots, cold-cathodes for UNCD particles and MEMS, biosensors, electrochemical, and nerve prostheses, high temperature, highly rectifying diodes, FET’s, thermoelectrics for UNCD films. This Proceedings volume will be of interest to a wide audience of scientists and engineers and serve as an introduction to an important and rapidly evolving field of nanoscience and nanomaterials; as a text for a special topics graduate course; or as a starting point for those interested in the development of new approaches to problems that have hitherto defied solution for lack of suitable materials.

Author: Tatiana Da Ros
Publisher: Royal Society of Chemistry
ISBN: 1788015673
Category : Science
Languages : en
Pages : 375

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Book Description
Carbon nanostructures, namely fullerenes, single and multiwall carbon nanotubes, graphene as well as the most recent graphene quantum dots and carbon nanodots, have experienced a tremendous progress along the last two decades in terms of the knowledge acquired on their chemical and physical properties. These insights have enabled their increasing use in biomedical applications, from scaffolds to devices. Edited by renowned experts in the subject, this book collects and delineates the most notable advances within the growing field surrounding carbon nanostructures for biomedical purposes. Exploration ranges from fundamentals around classifications to toxicity, biocompatibility and the immune response. Modified nanocarbon-based materials and emergent classes, such as carbon dots and nanohorns are discussed, with chapters devoted from carriers for drug delivery and inhibitors of emergent viruses infection, to applications across imaging, biosensors, tissue scaffolding and biotechnology. The book will provide a valuable reference resource and will extensively benefit researchers and professionals working across the fields of chemistry, materials science, and biomedical and chemical engineering.