Microstructural, Mechanical and Antibacterial Characterization of Nanocrystalline Diamond Thin Films PDF Download

Author: Jamal Sana Lewis
Publisher:
ISBN:
Category :
Languages : en
Pages : 69

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Keywords: biomedical coatings, antibacterial, nanocrystalline diamond, mechanical properties.

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

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Book Description
Nanocrystalline diamond thin films exhibit unusual hardness, wear resistance, and corrosion resistance properties, and are currently being considered for use in orthopaedic, ophthalmic, and other medical implants. The purpose of this study was to evaluate the hardness, Young's modulus, microscratch adhesion, and antimicrobial properties of nanocrystalline diamond thin films. Microwave plasma enhanced chemical vapor deposition (MPCVD) was used to deposit nanocrystalline diamond thin films on p-type silicon wafers. Raman spectroscopy, scanning electron microscopy (SEM), and high resolution transmission electron microscopy (HRTEM) were used to determine quality and phase purity of the nanocrystalline diamond thin films. The thin films consisted of diamond nodules that varied in morphology (size=60-600 nm). HRTEM showed that the films contained rectangular crystallites with dimensions between 2 -- 4 nm. Raman spectroscopy confirmed that the thin film sample contained both tetrahedrally-bonded and amorphous carbon phases. The hardness and Young's modulus values for the nanocrystalline diamond thin films were 29.4 " 11.9 GPa to 72.0 " 10.7 GPa and 346.4 " 98 GPa to 551.8 " 71.5 GPa, respectively. Microscratch adhesion testing was performed on the nanocrystalline diamond films to examine the functional adhesion strength between the diamond films and the silicon substrates. The nanocrystalline diamond/silicon wafer systems demonstrated very good film adhesion (LCN H"3.1 -- 3.4 N). A CDC biofilm reactor was utilized to incubate and grow Pseudomonas fluorescens on the surfaces of the nanocrystalline diamond thin films and stainless steel coupons. Quantitative data showed that bacterial attachment on the nanocrystalline diamond thin films was quite significant and comparable to that on stainless steel surfaces. This work suggests that nanocrystalline diamond thin films are good candidate materials for biomedical implants but are susceptible.

Author: Sam Zhang
Publisher: Imperial College Press
ISBN: 1860949975
Category : Science
Languages : en
Pages : 628

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Materials development has reached a point where it is difficult for a single material to satisfy the needs of sophisticated applications in the modern world. Nanocomposite films and coatings achieve much more than the simple addition of the constitutents OCo the law of summation fails to work in the nano-world. This book encompasses three major parts of the development of nanocomposite films and coatings: the first focuses on processing and properties, the second concentrates on mechanical performance, and the third deals with functional performance, including wide application areas ranging from mechanical cutting to solar energy and from electronics to medicine. Sample Chapter(s). Chapter 1: Magnetron Sputtered Hard and Yet Tough Nanocomposite Coatings With Case Studies: Nanocrystalline Tin Embedded in Amorphous SiNx (187 KB). Contents: Magnetron Sputtered Hard and Yet Tough Nanocomposite Coatings with Case Studies: Nanocrystalline TiN Embedded in Amorphous SiN x (S Zhang et al.); Magnetron Sputtered Hard and Yet Tough Nanocomposite Coatings with Case Studies: Nanocrystalline TiC Embedded in Amorphous Carbon (S Zhang et al.); Properties of Chemical Vapor Deposited Nanocrystalline Diamond and Nanodiamond/Amorphous Carbon Composite Films (S C Tjong); Synthesis, Characterization and Applications of Nanocrystalline Diamond Films (Z-Q Xu & A Kumar); Properties of Hard Nanocomposite Thin Films (J Musil); Nanostructured, Multifunctional Tribological Coatings (J J Moore et al.); Nanocomposite Thin Films for Solar Energy Conversion (Y-B Yin); Application of Silicon Nanocrystal in Non-Volatile Memory Devices (T P Chen); Nanocrystalline Silicon Films for Thin Film Transistor and Optoelectronic Applications (Y-J Choi et al.); Amorphous and Nanocomposite Diamond-Like Carbon Coatings for Biomedical Applications (T I T Okpalugo et al.); Nanocoatings for Orthopaedic and Dental Application (W-Q Yan). Readership: Undergraduates, postgraduates, researchers, scientists, college and university professors, research professionals, technology investors and developers, research enterprises, R&D research laboratories, academic and research libraries."

Author: Matthias Wiora
Publisher:
ISBN:
Category :
Languages : en
Pages : 123

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Author: Nicolas Wöhrl
Publisher:
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Category :
Languages : en
Pages : 175

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Author: Mathias Wiora
Publisher:
ISBN:
Category : Coatings
Languages : de
Pages : 123

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Author: Omar Alshekhli
Publisher:
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Category :
Languages : en
Pages :

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Author: Bradley Earl Williams
Publisher:
ISBN:
Category :
Languages : en
Pages : 444

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Author: Swaminathan Jayaraman
Publisher:
ISBN:
Category :
Languages : en
Pages : 170

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Author: Olga A. Shenderova
Publisher: William Andrew
ISBN: 1437734669
Category : Science
Languages : en
Pages : 581

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Book Description
Ultrananocrystalline Diamond: Synthesis, Properties, and Applications is a unique practical reference handbook. Written by the leading experts worldwide it introduces the science of UNCD for both the R&D community and applications developers using UNCD in a diverse range of applications from macro to nanodevices, such as energy-saving ultra-low friction and wear coatings for mechanical pump seals and tools, high-performance MEMS/NEMS-based systems (e.g. in telecommunications), the next generation of high-definition flat panel displays, in-vivo biomedical implants, and biosensors. This work brings together the basic science of nanoscale diamond structures, with detailed information on ultra-nanodiamond synthesis, properties, and applications. The book offers discussion on UNCD in its two forms, as a powder and as a chemical vapor deposited film. Also discussed are the superior mechanical, tribological, transport, electrochemical, and electron emission properties of UNCD for a wide range of applications including MEMS/ NEMS, surface acoustic wave (SAW) devices, electrochemical sensors, coatings for field emission arrays, photonic and RF switching, biosensors, and neural prostheses, etc. Ultrananocrystalline Diamond summarises the most recent developments in the nanodiamond field, and presents them in a way that will be useful to the R&D community in both academic and corporate sectors Coverage of both nanodiamond particles and films make this a valuable resource for both the nanotechnology community and the field of thin films / vacuum deposition Written by the world’s leading experts in nanodiamond, this second edition builds on its predecessor’s reputation as the most up-to-date resource in the field