Pulsed Laser Deposition of Thin Calcium Phosphate Coatings

León, B.

doi:10.1007/978-0-387-77718-4_5

Cited by 29 publications

(56 citation statements)

References 126 publications

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“…Hydroxyapatite (HAP) is a mineral compound from the apatite group, the basic salt of calcium and phosphoric acid (calcium phosphate) with the formula Ca 5 (OH) (PO 4 ) 3 , a widely employed multifunctional material in biomedicine, health care, biology, ecology, catalysis, and for environmental remediation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. First of all, HAP is the main mineral component of mammalian hard tissues (bone and teeth).…”

Section: Introductionmentioning

confidence: 99%

Simulation and Computer Study of Structures and Physical Properties of Hydroxyapatite with Various Defects

et al. 2021

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Simulation and computer studies of the structural and physical properties of hydroxyapatite (HAP) with different defects are presented in this review. HAP is a well-known material that is actively used in various fields of medicine, nanotechnology, and photocatalytic processes. However, all HAP samples have various defects and are still insufficiently studied. First of all, oxygen and OH group vacancies are important defects in HAP, which significantly affect its properties. The properties of HAP are also influenced by various substitutions of atoms in the HAP crystal lattice. The results of calculations by modern density functional theory methods of HAP structures with these different defects, primarily with oxygen and hydroxyl vacancies are analyzed in this review. The results obtained show that during the structural optimization of HAP with various defects, both the parameters of the crystallographic cells of the HAP change and the entire band structure of the HAP changes (changes in the band gap). This affects the electronic, optical, and elastic properties of HAP. The review considers the results of modeling and calculation of HAP containing various defects, the applied calculation methods, and the features of the effect of these defects on the properties of HAP, which is important for many practical applications.

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Section: Introductionmentioning

confidence: 99%

Simulation and Computer Study of Structures and Physical Properties of Hydroxyapatite with Various Defects

et al. 2021

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“…This biomaterial is also applied as a coating for orthopedic and dental implants enhancing their surface properties and the bone‐implant interface and, thus, leading to the improvement in its osseointegration 1. Different methods frequently used to modify metallic surfaces, as plasma‐spraying, magnetron sputtering, ion beam coating, electrophoretic deposition or pulsed laser deposition (PLD), are being intensively investigated especially focused in the obtaining of HA bioactive coatings 2. Among them, PLD has proven to be a very versatile technique that allows a finer control in the composition and morphology of the deposited material with improved adherence 2–6…”

Section: Introductionmentioning

confidence: 99%

Effects of acid hydrolysis on microstructure of cured urea‐formaldehyde resins using atomic force microscopy

Park

Jeong

2011

J of Applied Polymer Sci

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This study investigated the effect of acid hydrolysis on the microstructure of cured urea-formaldehyde (UF) resins using atomic force microscopy (AFM) to better understand its hydrolytic degradation process which has been known to be responsible for the formaldehyde emission of wood-based composite panels. The AFM was scanned on both outer surface and facture surfaces of the thin films of cured UF resins that had been exposed to the etching of dilute hydrochloric acid to simulate their hydrolysis process. The AFM images showed two distinctive parts, which were classified as the hard and soft phases in cured UF resins. For the first time, this study reports the presence of thin filament-like crystalline structures on the fracture surface of cured UF resin. The soft phase of cured UF resins by ammonium chloride was much more easily hydrolyzed than those cured by ammonium sulfate, indicating that hardener types had a great impact on the hydrolytic degradation behavior of cured UF resins. The surface roughness measurement results also supported this result. The results of this study suggested that the soft phase was much more susceptible to the hydrolysis of cured UF resin than the hard phase.

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“…Sputtering is a process whereby atoms or molecules of some materials are ejected in a vacuum chamber, becoming precursors for coating, due to bombardment with high-energy ions [31,185]. Pulsed laser deposition (PLD) is a physical vapor deposition technique that was first described by Cotell [186] to deposit thin films of CaP [55,132,138,[187][188][189][190][191]. The PLD system (Figure 3) is typically composed of a KrF laser source, an ultrahigh vacuum deposition chamber equipped with a rotating target and a fixed substrate holder plus pumping systems.…”

Section: Dry Deposition Techniquesmentioning

confidence: 99%

Surface Engineering for Bone Implants: A Trend from Passive to Active Surfaces

et al. 2012

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Abstract:The mechanical and biological properties of bone implants need to be optimal to form a quick and firm connection with the surrounding environment in load bearing applications. Bone is a connective tissue composed of an organic collagenous matrix, a fine dispersion of reinforcing inorganic (calcium phosphate) nanocrystals, and bone-forming and -degrading cells. These different components have a synergistic and hierarchical structure that renders bone tissue properties unique in terms of hardness, flexibility and regenerative capacity. Metallic and polymeric materials offer mechanical strength and/or resilience that are required to simulate bone tissue in load-bearing applications in terms of maximum load, bending and fatigue strength. Nevertheless, the interaction between devices and the surrounding tissue at the implant interface is essential for success or failure of implants. In that respect, coatings can be applied to facilitate the process of bone healing and obtain a continuous transition from living tissue to the synthetic implant. Compounds that are inspired by inorganic (e.g., hydroxyapatite crystals) or organic (e.g., collagen, extracellular matrix components, enzymes) components of bone tissue, are the most obvious candidates for application as implant coating to improve the performance of bone implants. This review provides an overview of recent trends and strategies in surface engineering that are currently investigated to improve the biological performance of bone implants in terms of functionality and biological efficacy. OPEN ACCESSCoatings 2012, 2 96

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Pulsed Laser Deposition of Thin Calcium Phosphate Coatings

Cited by 29 publications

References 126 publications

Simulation and Computer Study of Structures and Physical Properties of Hydroxyapatite with Various Defects

Simulation and Computer Study of Structures and Physical Properties of Hydroxyapatite with Various Defects

Effects of acid hydrolysis on microstructure of cured urea‐formaldehyde resins using atomic force microscopy

Surface Engineering for Bone Implants: A Trend from Passive to Active Surfaces

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