scholarly journals Morphological, Chemical, and Biological Investigation of Ionic Substituted, Pulse Current Deposited Calcium Phosphate Coatings

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4690
Author(s):  
Monika Furko ◽  
Csaba Balázsi
Keyword(s):  
Electron Microscopy ◽  
Calcium Phosphate ◽  
Pulse Current ◽  
Physiological Solution ◽  
Elemental Distribution ◽  
Biological Investigation ◽  
X Ray ◽  
Phosphate Coatings ◽  
Potentiodynamic Curves ◽  
Calcium Phosphate Coatings

Ionic substituted calcium phosphate coatings (iCP) have been prepared by the electrochemical pulse current deposition technique with an alternate pulse on and off time of 5 ms onto a titanium alloy substrate. The elemental distribution and morphology of the deposited layers have been extensively studied by scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), and transmission electron microscopy (TEM). The crystallinity and phase structure of iCPs have been investigated by X-ray diffraction (XRD). The corrosion characteristics and biodegradability of coatings have been determined by electrochemical measurements, recording potentiodynamic curves in a physiological solution over a long-term immersion period. The cell viability tests confirmed that the iCP coating was biocompatible, while the corrosion tests proved its biodegradable characteristic. In our paper, we compare the morphological, chemical, and biological characteristics of silver and zinc substituted calcium phosphate layers deposited by the electrochemical method.

Effect of Substrate Temperature on Properties of Nano-Scale Functionally Graded Calcium Phosphate Coatings

2006 ◽  
Author(s):  
Travis Blalock ◽  
Xiao Bai ◽  
Afsaneh Rabiei
Keyword(s):  
Electron Microscopy ◽  
Calcium Phosphate ◽  
Substrate Temperature ◽  
Ion Beam ◽  
Processing Parameters ◽  
Functionally Graded ◽  
Cross Sectional ◽  
X Ray ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

The effect of substrate temperature and processing parameters on microstructure and crystallinity of calcium phosphate coatings deposited on heated substrates in an Ion Beam Assisted Deposition (IBAD) system are being studied. The experimental procedures include mechanical testing and film thickness measurements using bonding strength and profilometery. Cross-sectional scanning transmission electron microscopy (STEM) with energy dispersive X-ray spectroscopy (EDX) through the thickness of the film as well as scanning electron microscopy (SEM) with EDX at the top surface of the film was performed to evaluate the microstructure of the film. The coating crystallinity was studied through X-ray diffraction (XRD). The information gained from current analysis on the set temperature coatings will be used to refine the processing techniques of the Functionally Graded Hydroxyapatite (FGHA) coating.

Osseointegration of Calcium Phosphate Nanofilms on Titanium Alloy Implants

2007 ◽  
Vol 361-363 ◽  
pp. 645-648
Author(s):  
M.D. Paz ◽  
Stefano Chiussi ◽  
Pio González ◽  
Julia Serra ◽  
Betty León ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Titanium Alloy ◽  
Calcium Phosphate ◽  
Bone Regeneration ◽  
Bone Growth ◽  
Pulsed Laser ◽  
Titanium Implants ◽  
Optical Methods ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

In the present work two different hydroxyapatite nanofilms (50 and 100 nm thick) have been successfully deposited on titanium implants that were previously laser macrostructured in order to assess the influence of the thickness of nanometric calcium phosphate coatings on the osseointegration. Cylindrical implants were tested in a sheep tibia model together with titanium alloy controls achieving very good osseointegration results. Laser macrostructured titanium alloy implants have shown improved bone regeneration when coated with nanometric films of carbonated HA. The pulsed laser deposited nanofilm has promoted bone in-growth deep into the laser ablated craters. There were no significant differences between the two coating thicknesses, neither when assessed with electron microscopy or classical optical methods. This result suggests that the 50 nm coating is as effective as the 100 nm one, therefore implying that the thickness limit for such a bioactive layer to stimulate bone growth may be even further below.

X-ray Photoelectron Spectroscopy Characterization of Ion-Beam Sputter-Deposited Calcium Phosphate Coatings

1991 ◽  
Vol 74 (9) ◽  
pp. 2301-2304 ◽  
Author(s):  
Joo L. Ong ◽  
Larry A. Harris ◽  
Linda C. Lucas ◽  
William R. Lacefield ◽  
Douglas Rigney
Keyword(s):  
Calcium Phosphate ◽  
Photoelectron Spectroscopy ◽  
Ion Beam ◽  
X Ray ◽  
Phosphate Coatings ◽  
Sputter Deposited ◽  
Calcium Phosphate Coatings

Properties of Calcium-Phosphate Coatings Formed by Pulsed Laser Deposition

2015 ◽  
Vol 1085 ◽  
pp. 50-53 ◽  
Author(s):  
Yulia D. Lenivtseva ◽  
Ivan N. Lapin ◽  
Evgeny N. Bolbasov ◽  
Sergey I. Tverdokhlebov ◽  
V.A. Svetlichniy
Keyword(s):  
Electron Microscopy ◽  
Calcium Phosphate ◽  
Pulsed Laser Deposition ◽  
Vinylidene Fluoride ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Energy Dispersive Analysis ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings ◽  
Scanning Electron

The paper is dedicated to the research of calcium-phosphate coatings formed on the surface of the polymer layers (copolymer tetrafluoroethylene with vinylidene fluoride) by pulsed laser deposition. The calcium-phosphate coatings were formed using two different by composition targets. The morphology of the obtained coatings was analyzed by Scanning Electron Microscopy, the elemental composition was analyzed by Energy Dispersive Analysis, and the chemical composition was analyzed by Fourier Transform Infrared Spectroscopy.

Effect of Surface Topography and Chemical Composition on Wettability of Calcium Phosphate Coatings Formed on Ti-40Nb Alloy

2016 ◽  
Vol 683 ◽  
pp. 370-376 ◽  
Author(s):  
Ekaterina G. Komarova ◽  
Valentina Chebodaeva ◽  
Yuri P. Sharkeev ◽  
Maria Sedelnikova
Keyword(s):  
Free Surface ◽  
Chemical Composition ◽  
Calcium Phosphate ◽  
Surface Energy ◽  
Free Surface Energy ◽  
Process Duration ◽  
X Ray ◽  
Electrical Voltage ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

The influence of the microarc oxidation parameters as electrical voltage and process duration on the surface morphology and topography, wettability and chemical composition of calcium phosphate coatings on the low elastic module Ti-40mas.%Nb (Ti-40Nb) alloy surface has been investigated. The linear growth of thickness and roughness and the linear decrease of the free surface energy with increasing process electrical voltage have been obtained. It was shown that calcium phosphate coatings have low contact angle with liquids and high free surface energy, as a consequence. It indicates a high hydrophilicity. X-ray diffraction analyses showed that the coatings after deposition have X-ray amorphous state that indicates high rate of coating dissolution. The coatings have maximum Ca/P ratio is 0.6. The optimal range of the oxidation voltage from 200 to 250 V and process duration from 5 to 10 min has been found. Such parameters allow to form the coating with the specific morphology, roughness and thickness and high hydrophylicity.

scholarly journals Effect of the Porosity, Roughness, Wettability, and Charge of Micro-Arc Coatings on the Efficiency of Doxorubicin Delivery and Suppression of Cancer Cells

Coatings ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 664
Author(s):  
Mariya Borisovna Sedelnikova ◽  
Ekaterina G. Komarova ◽  
Yurii P. Sharkeev ◽  
Valentina V. Chebodaeva ◽  
Tatiana V. Tolkacheva ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
X Ray Diffraction ◽  
Oxidation Method ◽  
X Ray ◽  
Phosphate Coatings ◽  
Micro Arc Oxidation ◽  
Calcium Phosphate Coatings ◽  
Adsorption Desorption ◽  
Kinetics Of ◽  
Scanning Electron

Porous calcium phosphate coatings were formed by the micro-arc oxidation method on the surface of titanium for the loading and controlled release of the anticancer drug doxorubicin. The coatings’ morphology and microstructure were examined by scanning electron microscopy. The phase composition was determined with the help of X-ray diffraction analysis. Studies of the hydrophilic properties of the coatings and their zeta potential were carried out. Data on the kinetics of doxorubicin adsorption-desorption were obtained. In addition, the effect of calcium phosphate coatings impregnated with doxorubicin on the viability of the Neuro-2a cell line was revealed. The coating formed at low voltages of 200–250 V contained a greater number of branched communicating pores, and therefore they were able to adsorb a greater amount of doxorubicin. The surface charge also contributes to the process of the adsorption-desorption of doxorubicin, but this effect is not fully understood and further studies are required to identify it.

Principal Physics of Oblique Sputtering of Calcium Phosphate Coatings Using RF-Magnetron Discharge Plasma

2021 ◽  
Vol 63 (11) ◽  
pp. 1891-1897
Author(s):  
K. A. Prosolov ◽  
O. A. Belyavskaya ◽  
V. V. Lastovka ◽  
M. V. Chaikina ◽  
Yu. P. Sharkeev
Keyword(s):  
Calcium Phosphate ◽  
Discharge Plasma ◽  
Magnetron Discharge ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings

scholarly journals Mechanical and biological properties of electrodeposited calcium phosphate coatings

2019 ◽  
Vol 100 ◽  
pp. 475-484 ◽  
Author(s):  
T. Mokabber ◽  
Q. Zhou ◽  
A.I. Vakis ◽  
P. van Rijn ◽  
Y.T. Pei
Keyword(s):  
Calcium Phosphate ◽  
Biological Properties ◽  
Phosphate Coatings ◽  
Calcium Phosphate Coatings
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