scholarly journals Structural, mechanical and in vitro studies on pulsed laser deposition of hydroxyapatite on additive manufactured polyamide substrate

2016 ◽  
Vol 2 (2) ◽  
Author(s):  
Hariharan Kuppuswamy ◽  
Arumaikkannu Ganesan
Keyword(s):  
Pulsed Laser Deposition ◽  
Calcium Phosphates ◽  
Pulsed Laser ◽  
Building Blocks ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
Laser Deposition ◽  
Biological Fixation ◽  
Pull Out

Additive manufacturing (AM) is an emerging field that merges engineering and life sciences to produce components that can effectively act as a replacement in the human body. This AM encompasses biofabrication using cells, biological or biomaterials as building blocks to fabricate biological and bio-application oriented substance, device and therapeutic products through a broad range of engineering and biological processes. Furthermore, bioactive coating on BAM surface facilitates biological fixation between the prosthesis and the hard tissue which increases the long term stability and integrity of the implant. In this paper, hydroxyapatite (HA) powder was coated over AM polyamide sub-strate using pulsed laser deposition. Coating morphology was characterised using scanning electron microscope (SEM) analysis and observed that the coating was dominated by the presence of particle droplet with different sizes. Com-pounds like tricalcium phosphate and a few amorphous calcium phosphates were found along with HA which was con-firmed by X-ray diffraction (XRD) analysis. Fourier transform infrared spectroscopy (FTIR) techniques shows the presence of phosphate and carbonate groups in the HA structure. Nano-indentation and pull-out test reveals that the layer was strong enough and withstands higher load before it peels off. In vitro analysis was evaluated with human os-teosarcoma MG-63 cells with respect to the cell viability and results shows that the good viability was observed on coated surface due to combinational effect of Ca2+ and PO43? ions. The multitude of characterisation conducted on the coating has established that coating polyamide with HA results in a positive combination for an implant.

A study on in vitro and in vivo bioactivity of HA/45S5 composite films by pulsed laser deposition

2013 ◽  
Vol 270 ◽  
pp. 667-674 ◽  
Author(s):  
D.G. Wang ◽  
C.Z. Chen ◽  
Q.S. Ma ◽  
Q.P. Jin ◽  
H.C. Li
Keyword(s):  
Pulsed Laser Deposition ◽  
Composite Films ◽  
Pulsed Laser ◽  
Laser Deposition

scholarly journals Nonequilibrium Synthesis of TiO2 Nanoparticle “Building Blocks” for Crystal Growth by Sequential Attachment in Pulsed Laser Deposition

Nano Letters ◽  
2017 ◽  
Vol 17 (8) ◽  
pp. 4624-4633 ◽  
Author(s):  
Masoud Mahjouri-Samani ◽  
Mengkun Tian ◽  
Alexander A. Puretzky ◽  
Miaofang Chi ◽  
Kai Wang ◽  
...  
Keyword(s):  
Crystal Growth ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Building Blocks ◽  
Tio2 Nanoparticle ◽  
Laser Deposition

Effect of energy, temperature, and Cu-doped coatings on crystallinity of Hydroxyapatite thin films obtained by pulsed laser deposition

2021 ◽  
Author(s):  
Nooshin Kashi ◽  
Mahdi Momeni ◽  
Habib Hamidinezhad
Keyword(s):  
Pulsed Laser Deposition ◽  
Laser Energy ◽  
High Surface ◽  
Pulsed Laser ◽  
Xrd Analysis ◽  
Laser Deposition ◽  
Laser Source ◽  
X Ray Diffraction ◽  
Crystalline Films ◽  
Steel Substrates

In this work, a pulsed laser deposition (PLD) technique with an Nd:YAG laser source was used to produce pure Hydroxyapatite (HA) and Cu-substituted HA (Cu-HA) coatings on stainless steel substrates in vacuum at room temperature. It is observed that the combined effects of percentages of Cu dopants and laser energy as well as annealing temperature significantly modify the crystallinity of the films. The morphology and structural properties of the deposited HA films were analyzed by field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and Raman spectroscopy. FESEM images displayed various shapes of nanoparticles with high-surface density throughout the area of the substrate and with typical sizes around 26–208 nm. XRD analysis confirmed that post-deposition annealing is essential to achieve the desired crystallinity and uniformity of coatings. The Raman spectrum of HA has peaks at 958.22, 437.48, and 587.05 cm[Formula: see text] attributed to the [Formula: see text] PO[Formula: see text], [Formula: see text] PO[Formula: see text], and [Formula: see text] PO[Formula: see text], respectively. The synthesized HA and Cu-HA crystalline films are nanostructures with dense and compact microstructures. Finally, irregular surface and crystalline structure of fabricated films lead to the extension of the surface and enhance the cell’s proliferation in medical uses and biomedical applications.

Low Temperature Synthesis of Carbide Thin Films by Pulsed Laser Deposition (PLD)

1991 ◽  
Vol 235 ◽  
Author(s):  
M. S. Donley ◽  
J. S. Zabinski ◽  
W. J. Sessler ◽  
V. J. Dyhouse ◽  
S. D. Walck ◽  
...  
Keyword(s):  
Thin Films ◽  
Boron Carbide ◽  
Pulsed Laser Deposition ◽  
Room Temperature ◽  
Pulsed Laser ◽  
Sem Analysis ◽  
Laser Deposition ◽  
Binder Phase ◽  
Fine Grained ◽  
Boron Carbide B4c

ABSTRACTThin films of titanium carbide (TiC) and boron carbide (B4C) were grown by excimer pulsed laser deposition (PLD) at room temperature (RT) and 300°C. Films were deposited using the output of an excimer laser operating with KrF gas (γ = 248 nm, 15 ns pulse duration) to ablate hot-pressed targets. Film chemistry, morphology, and crystallinity were investigated. Stoichiometric, crystalline TiC films were grown on 440C stainless steel and NaCl substrates at room temperature and at 300°C. The films grown on NaCl were nanocrystalline, cubic TiC, with a grain size ranging between 2 and 10 nm in diameter. Boron carbide films were grown on silicon {100} substrates at room temperature and at 300°C. Film chemistry and stoichiometry duplicated that of the B4C target, which contained B4C and a mixed C-B-O-N binder phase. SEM analysis indicated that the morphology of the films was uniform, non-porous, and fine-grained. The films exhibited good adhesion and wear resistance, based on friction and wear data collected with a ball-on-disc tribometer.

Pulsed laser deposition and in vitro characteristics of triphasic – HASi composition on titanium

2013 ◽  
Vol 28 (6) ◽  
pp. 849-858 ◽  
Author(s):  
Rajesh Palangadan ◽  
Anil Sukumaran ◽  
Francis B Fernandez ◽  
Annie John ◽  
Harikrishna Varma
Keyword(s):  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition

Biocompatible and bioactive nanostructured glass coatings synthesized by pulsed laser deposition: In vitro biological tests

2009 ◽  
Vol 255 (10) ◽  
pp. 5486-5490 ◽  
Author(s):  
A.C. Popescu ◽  
F. Sima ◽  
L. Duta ◽  
C. Popescu ◽  
I.N. Mihailescu ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Biological Tests

CdS Nanostructured Thin Films Synthesized by Pulsed Laser Deposition for Solar Cell Technology

2021 ◽  
Vol 882 ◽  
pp. 155-164
Author(s):  
Jinan A. Abd ◽  
Wasan M. Mohammed ◽  
Amer Al-Nafiey
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Solar Cell ◽  
Pulsed Laser Deposition ◽  
Crystalline Structure ◽  
Pulsed Laser ◽  
Laser Pulses ◽  
Xrd Analysis ◽  
Laser Deposition ◽  
Cds Thin Films

CdS thin films have been grown on glass substrate at 250o C employing pulsed laser deposition method. The effect of laser pulses number on the crystalline structure, surface morphology, optical properties, and films thickness have been studied. XRD analysis shows that the CdS films have polycrystalline and hexagonal nanostructure with three notable peaks along (100), (002), and (101) planes and preferentially orientated along (101). The crystallite size of the preferred orientation was in the range of (21.4 - 27.3 nm). With small pulses number, XRD pattern confirms the formation of CdO with three peaks (111), (200), and (220). Theses peaks gradually reduce with the increasing of the pulses. The absorbance of the films is in the visible part of the spectrum. The band gap of the synthesized films reduces by rising the number of laser pulses. AFM studies indicate that the grain size and surface roughness increase with the film thickness. Due to the good crystalline structure and optical properties of the film of the highest thickness, it has been grown on a wafer silicon substrate for solar cell applications measurements. Hall measurements indicate low resistivity of 0.3×10-2 (Ω.m) and high conductivity of 3.3×10+2 (Ω.m)-1. The efficiency of the n-CdS/ p-Si junction has been calculated to be 3.4 % using I-V characteristic measurement. Keywords: pulsed laser, thin films, structural, optical, morphology, solar cell measurements

Influence of Sr-Doping on the Structure of LaCoO3 Thin Films Prepared by Pulsed Laser Deposition

2015 ◽  
Vol 231 ◽  
pp. 19-24 ◽  
Author(s):  
Agnieszka Kopia ◽  
Łukasz Cieniek ◽  
Kazimierz Kowalski ◽  
Jan Kusiński
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Pulsed Laser Deposition ◽  
Pulsed Laser ◽  
Sem Analysis ◽  
Laser Deposition ◽  
Layer Surface ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure And Morphology

The aim of the research was to investigate the influence of strontium on the structure thin films La1-x SrxCoO3 (x=0; 0.1, 0.2). The LaCoO3 and LaCoO3 doped by Sr films were grown by pulsed laser deposition (PLD) on Si [100] substrate using an Excimer KrF (= 248 nm). To characterize the structure and morphology of the thin films were used the SEM, AFM and XRD methods. X-Ray Diffraction analysis showed only LaCoO3 phase in the thin film not doped andLa0.1Sr0.9CoO3 and La0.2Sr0.8CoO3 phases in thin films doped by Sr. The crystallites size, calculated by Williamson-Hall plots, was smaller for films doped by Sr. The surface of the thin films was free from the drops. SEM analysis showed change of the shape of thin films as a result of doping by Sr. Highly developed layer surface was observed using the AFM microscope for thin films doped by Sr.

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