Effect of laser pulses on ion release behavior of Ti-base alloys

2019 ◽  
Author(s):  
Emad S. Al-Hassani
Keyword(s):  
Laser Pulses ◽  
Release Behavior ◽  
Ion Release

scholarly journals 3D Titania Nanofiber-Like Webs Induced by Plasma Ionization: A New Direction for Bioreactivity and Osteoinductivity Enhancement of Biomaterials

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Mohammad-Hossein Beigi ◽  
Naghmeh Safaie ◽  
Mohammad-Hossein Nasr-Esfahani ◽  
Amirkianoosh Kiani
Keyword(s):  
Colorimetric Method ◽  
Three Dimensional ◽  
Picosecond Laser ◽  
Laser Pulses ◽  
Ambient Air ◽  
Analytical Form ◽  
Ion Release ◽  
Characterization Methods ◽  
Wide Range

AbstractIn this study, we describe the formation method of web-like three-dimensional (3-D) titania nanofibrous structures coated on transparent substrate via a high intensity laser induced reverse transfer (HILIRT) process. First, we demonstrate the mechanism of ablation and deposition of Ti on the glass substrates using multiple picosecond laser pulses at ambient air in an explicit analytical form and compare the theoretical results with the experimental results of generated nanofibers. We then examine the performance of the developed glass samples coated by titania nanofibrous structures at varied laser pulse durations by electron microscopy and characterization methods. We follow this by exploring the response of human bone-derived mesenchymal stem cells (BMSCs) with the specimens, using a wide range of in-vitro analyses including MTS assay (colorimetric method for assessing cell metabolic activity), immunocytochemistry, mineralization, ion release examination, gene expression analysis, and protein adsorption and absorption analysis. Our results from the quantitative and qualitative analyses show a significant biocompatibility improvement in the laser treated samples compared to untreated substrates. By decreasing the pulse duration, more titania nanofibers with denser structures can be generated during the HILIRT technique. The findings also suggest that the density of nanostructures and concentration of coated nanofibers play critical roles in the bioreactivity properties of the treated samples, which results in early osteogenic differentiation of BMSCs.

Study on Preparation and Anodic Oxidation of Gradient Porous NiTi Alloy

2012 ◽  
Vol 430-432 ◽  
pp. 1373-1377
Author(s):  
Qiang Li ◽  
Jing Yuan Yu ◽  
Xu Dong Sun
Keyword(s):  
Anodic Oxidation ◽  
Niti Alloy ◽  
Surface Film ◽  
Powder Metallurgy Method ◽  
Release Behavior ◽  
Ion Release ◽  
Gradient Distribution ◽  
Niti Alloys ◽  
Porous Niti ◽  
Oxidation Technology

Gradient porous NiTi alloys were prepared by powder metallurgy method using NH4HCO3 as space-holder and modified by direct current-pulse anodic oxidation technology in low temperature. Pore characteristic and phase composition of gradient porous NiTi alloys were studied. Microstructure, composition, anti-corrosion and Ni ion release behavior of surface film were observed. The results show the porosity of porous NiTi alloys decreases from 53.2% to 42.8%, when the content of NH4HCO3 varying from uniformity to gradient distribution. The sintered gradient porous NiTi alloys composes with TiNi, Ti2Ni and TiNi3 phases. After anodic oxidation, Ti oxidation film with the thick of 240nm was formed on the gradient porous NiTi alloy. The corrosion resistance of gradient porous NiTi alloy was obviously improved and the rate of Ni release was significantly reduced.

Laser Ablation Synthesis in Solution of Nanoantimicrobials for Food Packaging Applications

2015 ◽  
Vol 1804 ◽  
pp. 37-42 ◽  
Author(s):  
Maria C. Sportelli ◽  
Antonio Ancona ◽  
Rosaria A. Picca ◽  
Adriana Trapani ◽  
Annalisa Volpe ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Metal Ion ◽  
Food Packaging ◽  
Antimicrobial Properties ◽  
Laser Pulses ◽  
Femtosecond Laser Pulses ◽  
Ion Release ◽  
Bioactive Materials ◽  
Molar Ratios ◽  
Metal Ion Release

ABSTRACTDesigning bioactive materials, with controlled metal ion release, exerting significant bioactivity and associated low toxicity for humans, is nowadays one of the most important challenges for the scientific community. In this work, we propose a new material combining the well-known antimicrobial properties of copper nanoparticles (CuNPs) with those of bioactive chitosan (CS), a cheap natural polymer widely exploited for its biodegradability and nontoxicity. Here, we used ultrafast femtosecond laser pulses to finely fragment, via laser ablation, a Cu solid target immersed into aqueous CS solutions. Homogeneously dispersed copper-chitosan (Cu-CS) colloids were obtained by tuning the Cu/CS molar ratios, according to the initial chitosan concentration, as well as other experimental parameters. Cu-CS colloids were characterized by several techniques, like UV-Vis and X-ray Photoelectron spectroscopies (XPS). Transmission Electron Microscopy (TEM) was used to morphologically characterize the novel nanocomposites.

Preparation and cupric ion release behavior of Cu/LDPE porous composites with tunable pore morphology for intrauterine devices

2013 ◽  
Vol 33 (5) ◽  
pp. 2800-2807 ◽  
Author(s):  
Lian Xiao ◽  
Xianping Xia ◽  
Changsheng Xie ◽  
Man Ge ◽  
Cheng Xiao ◽  
...  
Keyword(s):  
Pore Morphology ◽  
Release Behavior ◽  
Intrauterine Devices ◽  
Ion Release ◽  
Cupric Ion ◽  
Porous Composites

scholarly journals Different zeolite systems for colon cancer therapy: monitoring of ion release, cytotoxicity and drug release behavior

2019 ◽  
Vol 8 (2) ◽  
pp. 101-113 ◽  
Author(s):  
A. G. Abd-Elsatar ◽  
M. M. Farag ◽  
H. F. Youssef ◽  
S. A. Salih ◽  
M. M. Mounier ◽  
...  
Keyword(s):  
Colon Cancer ◽  
Cancer Therapy ◽  
Drug Release ◽  
Therapy Monitoring ◽  
Release Behavior ◽  
Ion Release ◽  
Drug Release Behavior

Controlled Ion Release Property of Glass Ionomer Cement Containing Nanoporous Silica Particles

2016 ◽  
Vol 720 ◽  
pp. 17-20
Author(s):  
Ko Nakanishi ◽  
Yosuke Bando ◽  
Tomohiko Katsurayama ◽  
Shino Morimoto ◽  
Shigeaki Abe ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Silica Particles ◽  
Nanoporous Silica ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Release Behavior ◽  
Ion Release ◽  
Dye Release ◽  
Release Property ◽  
Ionomer Cement

Controlled ion release property of nanoporous silica particles (NPS) were investigated using cationic fluorescent dye, rhodamine B. The dye was charged into a glass ionomer cements (GIC) pellet containing the particles and then the pellet were immersed into distilled water. The dye-release behavior was observed using a UV-vis. spectrophotometer. GIC containing NPS can release the dye for a couple of weeks, where as other samples released it only a few days. This result suggests that NPS has excellent sustained dye-release property.

Corrosion and ion release behavior of ultra-fine grained bulk pure copper fabricated by ECAP in Hanks solution as potential biomaterial for contraception

2010 ◽  
Vol 64 (4) ◽  
pp. 524-527 ◽  
Author(s):  
X.X. Xu ◽  
F.L. Nie ◽  
J.X. Zhang ◽  
W. Zheng ◽  
Y.F. Zheng ◽  
...  
Keyword(s):  
Pure Copper ◽  
Release Behavior ◽  
Ion Release ◽  
Fine Grained

Structural Evolution and Copper-Ion Release Behavior of Cu-pHEMA Hybrids Synthesized In Situ

2009 ◽  
Vol 11 (11) ◽  
pp. B219-B226 ◽  
Author(s):  
Yen-Yu Liu ◽  
Tsan-Hua Tung ◽  
Kun-Ho Liu ◽  
San-Yuan Chen ◽  
Dean-Mo Liu
Keyword(s):  
Copper Ion ◽  
Structural Evolution ◽  
Release Behavior ◽  
Ion Release
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