1
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Zhang Z, Yang Y, Guo Y, Sha P, Xu Z, Yu Z, Si J, Zhang Z, Guo J, Chen Y. Adhesion and corrosion resistance of polycaprolactone coating on NiTi alloy surface after alkali heat pretreatment. BIOSURFACE AND BIOTRIBOLOGY 2022. [DOI: 10.1049/bsb2.12051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Zhihui Zhang
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- Weihai Institute for Bionic Jilin University Weihai China
| | - Yanan Yang
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- Weihai Institute for Bionic Jilin University Weihai China
| | - Yunting Guo
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- Weihai Institute for Bionic Jilin University Weihai China
| | - Pengwei Sha
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- Weihai Institute for Bionic Jilin University Weihai China
| | - Zezhou Xu
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- Weihai Institute for Bionic Jilin University Weihai China
| | - Zhenglei Yu
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China
| | - Jiashun Si
- Beijing Reserarch Institute of Automation for Machinery Industry Co., Ltd Beijing China
| | - Zhengao Zhang
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
| | - Jia Guo
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- Key Laboratory of Automobile Materials Ministry of Education College of Materials Science and Engineering Jilin University Changchun China
| | - Yifan Chen
- Key Laboratory of Bionic Engineering Ministry of Education Jilin University Changchun China
- State Key Laboratory of Automotive Simulation and Control Jilin University Changchun China
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2
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A Two-Step Approach to Tune the Micro and Nanoscale Morphology of Porous Niobium Oxide to Promote Osteointegration. MATERIALS 2022; 15:ma15020473. [PMID: 35057189 PMCID: PMC8778385 DOI: 10.3390/ma15020473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 01/04/2022] [Accepted: 01/05/2022] [Indexed: 11/17/2022]
Abstract
We present a two-step surface modification process to tailor the micro and nano morphology of niobium oxide layers. Niobium was firstly anodized in spark regime in a Ca- and P-containing solution and subsequently treated by acid etching. The effects of anodizing time and applied potential on the surface morphology is investigated with SEM and AFM, complemented by XPS compositional analysis. Anodizing with a limiting potential of 250 V results in the fast growth of oxide layers with a homogeneous distribution of micro-sized pores. Cracks are, however, observed on 250 V grown layers. Limiting the anodizing potential to 200 V slows down the oxide growth, increasing the anodizing time needed to achieve a uniform pore coverage but produces fracture-free oxide layers. The surface nano morphology is further tuned by a subsequent acid etching process that leads to the formation of nano-sized pits on the anodically grown oxide surface. In vitro tests show that the etching-induced nanostructure effectively promotes cell adhesion and spreading onto the niobium oxide surface.
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3
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Khorashadizade E, Mohajernia S, Hejazi S, Mehdipour H, Naseri N, Moradlou O, Liu N, Moshfegh AZ, Schmuki P. Alkali Metal Cation Incorporation in Conductive TiO
2
Nanoflakes with Improved Photoelectrochemical H
2
Generation. ChemElectroChem 2020. [DOI: 10.1002/celc.202000238] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Elham Khorashadizade
- Department of Physics Sharif University of Technology Azadi Avenue Tehran Iran
- Department of Materials Science Engineering University of Erlangen-Nuremberg Martensstrasse 7 D-91058 Erlangen Germany
| | - Shiva Mohajernia
- Department of Materials Science Engineering University of Erlangen-Nuremberg Martensstrasse 7 D-91058 Erlangen Germany
| | - Seyedsina Hejazi
- Department of Materials Science Engineering University of Erlangen-Nuremberg Martensstrasse 7 D-91058 Erlangen Germany
| | - Hamid Mehdipour
- Department of Physics Sharif University of Technology Azadi Avenue Tehran Iran
| | - Naimeh Naseri
- Department of Physics Sharif University of Technology Azadi Avenue Tehran Iran
| | - Omran Moradlou
- Department of Chemistry Alzahra University Vanak Village Street Tehran Iran
| | - Ning Liu
- Department of Materials Science Engineering University of Erlangen-Nuremberg Martensstrasse 7 D-91058 Erlangen Germany
| | - Alireza Z. Moshfegh
- Department of Physics Sharif University of Technology Azadi Avenue Tehran Iran
- Institute for Nanoscience and Nanotechnology Sharif University of Technology Azadi Avenue Tehran Iran
| | - Patrik Schmuki
- Department of Materials Science Engineering University of Erlangen-Nuremberg Martensstrasse 7 D-91058 Erlangen Germany
- Department of Chemistry King Abdulaziz University Jeddah Saudi Arabia
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4
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Fu J, Liu X, Tan L, Cui Z, Liang Y, Li Z, Zhu S, Zheng Y, Kwok Yeung KW, Chu PK, Wu S. Modulation of the mechanosensing of mesenchymal stem cells by laser-induced patterning for the acceleration of tissue reconstruction through the Wnt/β-catenin signaling pathway activation. Acta Biomater 2020; 101:152-167. [PMID: 31678738 DOI: 10.1016/j.actbio.2019.10.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 10/22/2019] [Accepted: 10/29/2019] [Indexed: 11/29/2022]
Abstract
Growing evidence suggests that the physical microenvironment can guide cell fate. However, cells sense cues from the adjacent physical microenvironment over a limited distance. In the present study, murine mesenchymal stem cells (MSCs) and murine preosteoblastic cells (MC3T3-E1) behaviors are regulated by the cell-material interface using ordered-micro and disordered-nano patterned structures on Ti implants. The optimal bone formation structure is a stable wave (horizontal direction: ridge, 2.7 µm; grooves, 5.3 µm; and vertical direction: distance, 700 µm) with the appropriate density of nano-branches (6.0 per µm2). The repeated waves provide cells with directional guidance, and the disordered branches influence cell geometry by providing different spacing and density nanostructure. And micro-nano patterned structure can provide biophysical cues to direct cell phenotype development, including cell size, shape, and orientation, to influence cellular processes including survival, growth, and differentiation. Thus, the overlaid isotropic and anisotropic cues, ordered-micro and disordered-nano patterned structures, could transfer further and alter cell shape and induce nuclear orientation by activating Wnt/β-catenin signaling to promote integrin α5, integrin β1, cadherin 2, Runx2, Opn, and Ocn. That canonical Wnt signaling inhibitor dickkopf1 further demonstrates osteogenic differentiation induced by ordered-micro and disordered-nano patterned structures, which is related to Wnt/β-catenin signaling. Our findings show the role of ordered microstructures and disordered nanostructures in modulating stem cell differentiation with potential medical applications. STATEMENT OF SIGNIFICANCE: It remains a challenge to modify poor osteogenic and osteoconductive properties of titanium alloy bases on the inherent poverty of titanium. We demonstrate that ordered microtopography and disordered nano topography pattern structure could lead to osteogenic differentiation in vitro and bone regeneration in vivo. Furthermore, the pattern structure is created through selective laser melting and alkali heat. And the structure only takes advantage of titanium itself and does not bring in active film, such as hydroxyapatite. On the other hand, we find that cell shape and orientation show angle-orientation tendency due to the polarity, which involves with mechanical signal created via patterned structure. Meanwhile, the Wnt/Ca2+ signaling pathway is activated.
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Affiliation(s)
- Jieni Fu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Xiangmei Liu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China.
| | - Lei Tan
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Zhenduo Cui
- School of Materials Science & Engineering, the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Yanqin Liang
- School of Materials Science & Engineering, the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Zhaoyang Li
- School of Materials Science & Engineering, the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Shengli Zhu
- School of Materials Science & Engineering, the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China
| | - Yufeng Zheng
- State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Kelvin Wai Kwok Yeung
- Department of Orthopaedics & Traumatology, Li KaShing Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong 999077, China
| | - Paul K Chu
- Department of Physics and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| | - Shuilin Wu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, Hubei Key Laboratory of Polymer Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China; School of Materials Science & Engineering, the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of China, Tianjin University, Tianjin 300072, China.
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5
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Reggente M, Kriegel S, He W, Masson P, Pourroy G, Mura F, Faerber J, Passeri D, Rossi M, Palkowski H, Carradò A. How alkali-activated Ti surfaces affect the growth of tethered PMMA chains: a close-up study on the PMMA thickness and surface morphology. PURE APPL CHEM 2019. [DOI: 10.1515/pac-2019-0223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Abstract
The alkali-activation of titanium (Ti) surfaces performed in a heated sodium hydroxide (NaOH) aqueous solution, results in a porous layer rich in hydroxyl (OH) groups, the structure and porosity of which strongly depend on the reaction time and NaOH concentration used. In this study, a polymerization initiator is covalently grafted on the alkali-activated Ti substrates by using a phosphonic acid as coupling agent and the resulting surfaces are used as scaffolds to drive the growth of tethered poly(methyl methacrylate) (PMMA) chains via a surface initiated atom transfer radical polymerisation (SI-ATRP). A close-up investigation of how different treatment times (1 h, 3 h, 6 h, 12 h, and 24 h) and NaOH concentrations (0.1 M, 0.5 M, 1 M, 2 M, and 5 M) affect the final PMMA morphology and thickness are presented.
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Affiliation(s)
- Melania Reggente
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
| | - Sebastien Kriegel
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Wenjia He
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Patrick Masson
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Geneviève Pourroy
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Francesco Mura
- Center for Nanotechnology for Engineering (CNIS) , Sapienza University of Rome , P. le A. Moro 5 , 00185 Rome , Italy
| | - Jacques Faerber
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering (BASE) , Sapienza University of Rome , Via Antonio Scarpa 16 , 00161 Rome , Italy
- Center for Nanotechnology for Engineering (CNIS) , Sapienza University of Rome , P. le A. Moro 5 , 00185 Rome , Italy
| | - Heinz Palkowski
- Clausthal University of Technology (TUC), IMET Institute of Metallurgy , Robert-Koch-Strasse 42 , 38678 Clausthal-Zellerfeld , Germany
| | - Adele Carradò
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS , Université de Strasbourg , 23 rue du Loess BP 43 , 67034 Strasbourg , France
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6
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Wang L, Yu H, Wang S, Chen B, Wang Y, Fan W, Sun D. Quantitative analysis of local fine structure on diffusion of point defects in passive film on Ti. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.048] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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7
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Nanostructured titanium surfaces fabricated by hydrothermal method: Influence of alkali conditions on the osteogenic performance of implants. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 94:1-10. [DOI: 10.1016/j.msec.2018.08.069] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 08/17/2018] [Accepted: 08/31/2018] [Indexed: 12/30/2022]
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8
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Yeniyol S, Ricci JL. Alkaline phosphatase levels of murine pre-osteoblastic cells on anodized and annealed titanium surfaces. Eur Oral Res 2018; 52:12-19. [PMID: 30574594 PMCID: PMC6300123 DOI: 10.26650/eor.2018.78387] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 08/01/2017] [Accepted: 09/28/2017] [Indexed: 11/20/2022] Open
Abstract
Purpose This study aimed to evaluate the initial adhesion morphology and alkaline phosphatase (ALP) activity of murine pre-osteoblastic MC3T3-E1 cells cultured on anatase/rutile mixed-phase TiO2 thin films with photocatalytical activity with previously confirmed antibacterial properties. Materials and methods Anatase/rutile mixed-phase TiO2 thin films fabricated by anodization and annealing of cpTi were used to culture MC3T3-E1 cells to evaluate the initial cellular adhesion morphology and ALP activity in vitro. Results Compared with MC3T3-E1 cells cultured on cpTi substrates and the control group, cells cultured on anatase/rutile mixed-phase TiO2 thin films exhibited similar ALP levels after cell culture day 9. Conclusion Anodizing and annealing processes fabricate multifunctional surfaces on cpTi with improved osteogenic properties for implants.
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Affiliation(s)
- Sinem Yeniyol
- Department of Oral Implantology, İstanbul University, Faculty of Dentistry, İstanbul, Turkey
| | - John Lawrence Ricci
- Department of Biomaterials and Biomimetics, New York University College of Dentistry, New York, USA
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9
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Reggente M, Masson P, Dollinger C, Palkowski H, Zafeiratos S, Jacomine L, Passeri D, Rossi M, Vrana NE, Pourroy G, Carradò A. Novel Alkali Activation of Titanium Substrates To Grow Thick and Covalently Bound PMMA Layers. ACS APPLIED MATERIALS & INTERFACES 2018; 10:5967-5977. [PMID: 29338177 DOI: 10.1021/acsami.7b17008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Titanium (Ti) is the most widely used metal in biomedical applications because of its biocompatibility; however, the significant difference in the mechanical properties between Ti and the surrounding tissues results in stress shielding which is detrimental for load-bearing tissues. In the current study, to attenuate the stress shielding effect, a new processing route was developed. It aimed at growing thick poly(methyl methacrylate) (PMMA) layers grafted on Ti substrates to incorporate a polymer component on Ti implants. However, the currently available methods do not allow the development of thick polymeric layers, reducing significantly their potential uses. The proposed route consists of an alkali activation of Ti substrates followed by a surface-initiated atom transfer radical polymerization using a phosphonic acid derivative as a coupling agent and a polymerization initiator and malononitrile as a polymerization activator. The average thickness of the grown PMMA layers is approximately 1.9 μm. The Ti activation-performed in a NaOH solution-leads to a porous sodium titanate interlayer with a hierarchical structure and an open microporosity. It promotes the covalent grafting reaction because of high hydroxyl groups' content and enables establishing a further mechanical interlocking between the growing PMMA layer and the Ti substrate. As a result, the produced graduated structure possesses high Ti/PMMA adhesion strength (∼260 MPa). Moreover, the PMMA layer is (i) thicker compared to those obtained with the previously reported techniques (∼1.9 μm), (ii) stable in a simulated body fluid solution, and (iii) biocompatible. This strategy opens new opportunities toward hybrid prosthesis with adjustable mechanical properties with respect to host bone properties for personalized medicines.
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Affiliation(s)
- Melania Reggente
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
- Department of Basic and Applied Sciences for Engineering (BASE), Sapienza University of Rome , Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Patrick Masson
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
| | | | - Heinz Palkowski
- Clausthal University of Technology (TUC), IMET Institute of Metallurgy , Robert-Koch-Strasse 42, 38678 Clausthal-Zellerfeld, Germany
| | - Spyridon Zafeiratos
- Institut de Chimie et Procédés pour l'Énergie, l'Environnement et la Santé (ICPEES), CNRS, Université de Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
| | - Leandro Jacomine
- Institut Charles Sadron, CNRS, UPR 22 , 23 rue du Loess BP 84047, 67034 Strasbourg, France
| | - Daniele Passeri
- Department of Basic and Applied Sciences for Engineering (BASE), Sapienza University of Rome , Via Antonio Scarpa 16, 00161 Rome, Italy
| | - Marco Rossi
- Department of Basic and Applied Sciences for Engineering (BASE), Sapienza University of Rome , Via Antonio Scarpa 16, 00161 Rome, Italy
- Center for Nanotechnology for Engineering (CNIS), Sapienza University of Rome , P. le A. Moro 5, 00185 Rome, Italy
| | - Nihal Engin Vrana
- Protip Medical , 8 Place de l'Hôpital, 67000 Strasbourg, France
- Institut National de la Santé et de la Recherche Médicale, INSERM Unité , 1121, 11 rue Humann, 67085 Strasbourg Cedex, France
- Université de Strasbourg, Faculté de Chirurgie Dentaire, Fédération de Médecine Translationnelle de Strasbourg, Fédération de Recherche Matériaux et Nanosciences Grand Est (FRMNGE) , P. le A. Moro 5, 67000 Strasbourg, France
| | - Geneviève Pourroy
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
| | - Adele Carradò
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), UMR 7504 CNRS, Université de Strasbourg , 23 rue du Loess BP 43, 67034 Strasbourg, France
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10
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Amin MA, Fadlallah SA, Alosaimi GS, Ahmed EM, Mostafa NY, Roussel P, Szunerits S, Boukherroub R. Room-Temperature Wet Chemical Synthesis of Au NPs/TiH 2/Nanocarved Ti Self-Supported Electrocatalysts for Highly Efficient H 2 Generation. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30115-30126. [PMID: 28771327 DOI: 10.1021/acsami.7b07611] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Self-supported electrocatalysts are a new class of materials exhibiting high catalytic performance for various electrochemical processes and can be directly equipped in energy conversion devices. We present here, for the first time, sparse Au NPs self-supported on etched Ti (nanocarved Ti substrate self-supported with TiH2) as promising catalysts for the electrochemical generation of hydrogen (H2) in KOH solutions. Cleaned, as-polished Ti substrates were etched in highly concentrated sulfuric acid solutions without and with 0.1 M NH4F at room temperature for 15 min. These two etching processes yielded a thin layer of TiH2 (the corrosion product of the etching process) self-supported on nanocarved Ti substrates with different morphologies. While F--free etching process led to formation of parallel channels (average width: 200 nm), where each channel consists of an array of rounded cavities (average width: 150 nm), etching in the presence of F- yielded Ti surface carved with nanogrooves (average width: 100 nm) in parallel orientation. Au NPs were then grown in situ (self-supported) on such etched surfaces via immersion in a standard gold solution at room temperature without using stabilizers or reducing agents, producing Au NPs/TiH2/nanostructured Ti catalysts. These materials were characterized by scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), grazing incidence X-ray diffraction (GIXRD), and X-ray photoelectron spectroscopy (XPS). GIXRD confirmed the formation of Au2Ti phase, thus referring to strong chemical interaction between the supported Au NPs and the substrate surface (also evidenced from XPS) as well as a titanium hydride phase of chemical composition TiH2. Electrochemical measurements in 0.1 M KOH solution revealed outstanding hydrogen evolution reaction (HER) electrocatalytic activity for our synthesized catalysts, with Au NPs/TiH2/nanogrooved Ti catalyst being the best one among them. It exhibited fast kinetics for the HER with onset potentials as low as -22 mV vs. RHE, high exchange current density of 0.7 mA cm-2, and a Tafel slope of 113 mV dec-1. These HER electrochemical kinetic parameters are very close to those measured here for a commercial Pt/C catalyst (onset potential: -20 mV, Tafel slope: 110 mV dec-1, and exchange current density: 0.75 mA cm-2). The high catalytic activity of these materials was attributed to the catalytic impacts of both TiH2 phase and self-supported Au NPs (active sites for the catalytic reduction of water to H2), in addition to their nanostructured features which provide a large-surface area for the HER.
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Affiliation(s)
- Mohammed A Amin
- Department of Chemistry, Faculty of Science, Ain Shams University , Abbassia, Cairo 11566, Egypt
| | - Sahar A Fadlallah
- Chemistry Department, Faculty of Science, Cairo University , 12613 Giza, Egypt
| | | | - Emad M Ahmed
- Solid State Physics Department, National Research Center , Dokki, Giza 12311, Egypt
| | - Nasser Y Mostafa
- Chemistry Department, Faculty of Science, Suez Canal University , Ismailia 41522, Egypt
| | - Pascal Roussel
- Univ. Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, UMR 8181 - UCCS - Unité de Catalyse et Chimie du Solide , F-59000 Lille, France
| | - Sabine Szunerits
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520 - IEMN , F-59000 Lille, France
| | - Rabah Boukherroub
- Univ. Lille, CNRS, Centrale Lille, ISEN, Univ. Valenciennes, UMR 8520 - IEMN , F-59000 Lille, France
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11
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Wang L, Yu H, Wang K, Xu H, Wang S, Sun D. Local Fine Structural Insight into Mechanism of Electrochemical Passivation of Titanium. ACS APPLIED MATERIALS & INTERFACES 2016; 8:18608-18619. [PMID: 27355902 DOI: 10.1021/acsami.6b05080] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Electrochemically formed passive film on titanium in 1.0 M H2SO4 solution and its thickness, composition, chemical state, and local fine structure are examined by Auger electron spectroscopy (AES), X-ray photoelectron spectroscopy (XPS), and X-ray absorption fine structure. AES analysis reveals that the thickness and composition of oxide film are proportional to the reciprocal of current density in potentiodynamic polarization. XPS depth profiles of the chemical states of titanium exhibit the coexistence of various valences cations in the surface. Quantitative X-ray absorption near edge structure analysis of the local electronic structure of the topmost surface (∼5.0 nm) shows that the ratio of [TiO2]/[Ti2O3] is consistent with that of passivation/dissolution of electrochemical activity. Theoretical calculation and analysis of extended X-ray absorption fine structure spectra at Ti K-edge indicate that both the structures of passivation and dissolution are distorted caused by the appearance of two different sites of Ti-O and Ti-Ti. And the bound water in the topmost surface plays a vital role in structural disorder confirmed by XPS. Overall, the increase of average Ti-O coordination causes the electrochemical passivation, and the dissolution is due to the decrease of average Ti-Ti coordination. The structural variations of passivation in coordination number and interatomic distance are in good agreement with the prediction of point defect model.
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Affiliation(s)
- Lu Wang
- National Center for Materials Service Safety (NCMS), ‡Institute of Advanced Materials and Technology, and §School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
| | - Hongying Yu
- National Center for Materials Service Safety (NCMS), ‡Institute of Advanced Materials and Technology, and §School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
| | - Ke Wang
- National Center for Materials Service Safety (NCMS), ‡Institute of Advanced Materials and Technology, and §School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
| | - Haisong Xu
- National Center for Materials Service Safety (NCMS), ‡Institute of Advanced Materials and Technology, and §School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
| | - Shaoyang Wang
- National Center for Materials Service Safety (NCMS), ‡Institute of Advanced Materials and Technology, and §School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
| | - Dongbai Sun
- National Center for Materials Service Safety (NCMS), ‡Institute of Advanced Materials and Technology, and §School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
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12
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Liu B, Xiao GY, Jiang CC, Zheng YZ, Wang LL, Lu YP. Formation initiation and structural changes of phosphate conversion coating on titanium induced by galvanic coupling and Fe2+ ions. RSC Adv 2016. [DOI: 10.1039/c6ra16847g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A scholzite coating was precipitated on Ti by a galvanically coupled approach and addition of iron ions in the bath.
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Affiliation(s)
- Bing Liu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Ji'nan 250061
- China
| | - Gui-yong Xiao
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Ji'nan 250061
- China
| | - Cong-cong Jiang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Ji'nan 250061
- China
| | - Yong-zhen Zheng
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Ji'nan 250061
- China
| | - Ling-ling Wang
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Ji'nan 250061
- China
| | - Yu-peng Lu
- Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials
- Ministry of Education
- Shandong University
- Ji'nan 250061
- China
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13
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Ou KL, Hsu HJ, Yang TS, Lin YH, Chen CS, Peng PW. Osseointegration of titanium implants with SLAffinity treatment: a histological and biomechanical study in miniature pigs. Clin Oral Investig 2015; 20:1515-24. [PMID: 26507647 DOI: 10.1007/s00784-015-1629-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 10/09/2015] [Indexed: 01/18/2023]
Abstract
PURPOSE Electrochemical oxidation following sandblasting and acid-etching (SLA) treatment has received interest as a surface modification procedure for titanium (Ti) implants (denoted as an SLAffinity surface); however, little information is available on its impacts on the in vivo performance of SLAffinity-Ti implants. The present study evaluated the osseointegration and biomechanical bone-tissue response to SLAffinity-Ti implants with micro- and nanoporous oxide layers. MATERIALS AND METHODS The interaction between blood and the tested implants was examined. In total, 144 implants with the following surfaces were used: a standard machined (M-Ti), an SLA-Ti, and an SLAffinity-Ti surface. For each animal, four implants (one M-Ti, one SLA-Ti, and two SLAffinity-Ti) were inserted into the mandibular canine-premolar area for histomorphometric observations and another four implants were inserted into the flat surface on the anteromedial aspect of the rear tibia for removal torque (RT) tests. After 2, 4, and 8 weeks of implantation, histomorphometric and RT tests were conducted. RESULTS Interactions between blood and implants were better for implants with the SLAffinity-Ti surface. RT tests showed a significant improvement in fixation strength for SLAffinity-Ti implants (84.5 ± 8.7 N-cm) after 8 weeks compared to M-Ti (62.95 ± 11.5 N-cm) and SLAffinity-Ti (76.1 ± 6.6 N-cm) implants. A histological evaluation showed that osseous integration had occurred with all implants after 8 weeks. SLAffinity-Ti implants exhibited 28.5 ± 6.2 % bone-to-implant contact (BIC) at 2 weeks and 84.3 ± 8.1 % at 8 weeks. M-Ti implants exhibited BIC levels of 17.0 ± 5.4 and 76.5 ± 6.3 %, whereas SLA-Ti implants exhibited BIC levels of 28.5 ± 6.2 and 81.1 ± 8.4 % at corresponding time intervals. In terms of the peri-implant bone area (BA), values for SLAffinity-Ti implants ranged from 29.5 ± 4.1 to 88.3 ± 3.0 %. For M-Ti implants, values ranged from 20.3 ± 5.5 to 81.7 ± 4.2 %. For SLA-Ti implants, values ranged from 23.0 ± 3.5 to 84.0 ± 3.6 %. CONCLUSIONS Electrochemical oxidation increased the oxide layers and improved the blood interaction with SLAffinity-Ti implants, resulting in significantly higher bone apposition with the SLAffinity-Ti implants after 2 and 8 weeks of healing. An increase in resistance for the RT of SLAffinity-Ti implants over the 8-week healing period was also observed. CLINICAL RELEVANCE The use of SLAffinity-Ti implants has potential for improvement of early osseointegration.
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Affiliation(s)
- Keng-Liang Ou
- School of Dentistry, Taipei Medical University, Taipei, 110, Taiwan.,Research Center for Biomedical Devices and Prototyping Production, Taipei Medical University, Taipei, 110, Taiwan.,Research Center for Biomedical Implants and Microsurgery Devices, Taipei Medical University, Taipei, 110, Taiwan
| | - Heng-Jui Hsu
- School of Dentistry, Taipei Medical University, Taipei, 110, Taiwan
| | - Tzu-Sen Yang
- School of Dental Technology, Taipei Medical University, Taipei, 110, Taiwan
| | - Yun-Ho Lin
- School of Dentistry, Taipei Medical University, Taipei, 110, Taiwan.,Department of Dentistry, Taipei Medical University Hospital, Taipei, 110, Taiwan
| | - Chin-Sung Chen
- School of Dentistry, Taipei Medical University, Taipei, 110, Taiwan. .,Department of Dentistry, Sijhih Cathay General Hospital, New Taipei, 221, Taiwan.
| | - Pei-Wen Peng
- School of Dental Technology, Taipei Medical University, Taipei, 110, Taiwan.
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14
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Kim C, Kendall MR, Miller MA, Long CL, Larson PR, Humphrey MB, Madden AS, Tas AC. Comparison of titanium soaked in 5 M NaOH or 5 M KOH solutions. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 33:327-39. [PMID: 23565038 DOI: 10.1016/j.msec.2012.08.047] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Commercially pure titanium plates/coupons and pure titanium powders were soaked for 24 h in 5 M NaOH and 5 M KOH solutions, under identical conditions, over the temperature range of 37° to 90 °C. Wettability of the surfaces of alkali-treated cpTi coupons was studied by using contact angle goniometry. cpTi coupons soaked in 5 M NaOH or 5 M KOH solutions were found to have hydrophilic surfaces. Hydrous alkali titanate nanofibers and nanotubes were identified with SEM/EDXS and grazing incidence XRD. Surface areas of Ti powders increased > 50–220 times, depending on the treatment, when soaked in the above solutions. A solution was developed to coat amorphous calcium phosphate, instead of hydroxyapatite, on Ti coupon surfaces. In vitro cell culture tests were performed with osteoblast-like cells on the alkali-treated samples.
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Affiliation(s)
- Christina Kim
- Oklahoma School of Science and Mathematics, Oklahoma City, OK 73104, USA
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15
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Biomimetic self-assembly of apatite hybrid materials: From a single molecular template to bi-/multi-molecular templates. Biotechnol Adv 2014; 32:744-60. [DOI: 10.1016/j.biotechadv.2013.10.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 10/17/2013] [Accepted: 10/29/2013] [Indexed: 12/25/2022]
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16
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Tanaka SI, Fukushima Y, Nakamura I, Tanaki T, Jerkiewicz G. Preparation and characterization of microporous layers on titanium by anodization in sulfuric acid with and without hydrogen charging. ACS APPLIED MATERIALS & INTERFACES 2013; 5:3340-3347. [PMID: 23488951 DOI: 10.1021/am400398d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The formation of microporous oxide layers on titanium (Ti) by anodization in sulfuric acid (H2SO4) solution and the influence of prior hydrogen charging on their properties are examined using electrochemical techniques, scanning electron microscopy, grazing incident X-ray diffraction, and X-ray photoelectron spectroscopy. When Ti is anodized in 1 M aqueous H2SO4 solution at a high direct current (DC) potential (>150 V) for 1 min, a porous surface layer develops, and the process takes place with spark-discharge. Under these conditions, oxygen evolution at the Ti electrode proceeds vigorously and concurrently with the formation of anodic oxide. The oxygen gas layer adjacent to the Ti surface acts as an insulator and triggers spark-discharge; the latter stimulates the development of pores. In the absence of spark-discharge, the oxide layer has extended surface roughness but low porosity. A porous oxide layer can be prepared by applying a lower DC voltage (130 V) and without spark-discharge, but Ti requires prior hydrogen charging by cathodic polarization in 1 M aqueous H2SO4 solution. Mott-Schottky measurements indicate that the oxide layers are n-type semiconductors and that the charge carrier density in the anodic oxide layer on the hydrogen-charged Ti is lower than in the case of untreated Ti. The hydrogen charging also affects the flat band potential of the anodic oxide layers on Ti by increasing its value. The reduced charge carrier density brought about by hydrogen charging decreases the oxide layer conductivity and creates favorable conditions for its electrical breakdown that stimulates the development of pores. The porous layer on the hydrogen-charged Ti consists of anatase and rutile phases of TiO2; it has the same chemical composition as the porous layer obtained on untreated Ti. X-ray photoelectron spectroscopy measurements show that prior hydrogen charging does not affect the thickness of anodic oxides on Ti. The porous oxide layer on Ti enables the growth of hydroxyapatite, thus revealing good bioactivity in simulated body fluids.
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Affiliation(s)
- Shin-ichi Tanaka
- Department of Material Science and Engineering, Kurume National College of Technology, 1-1-1, Komorino, Kurume, Fukuoka 830-8555, Japan.
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Kim C, Kendall MR, Miller MA, Long CL, Larson PR, Humphrey MB, Madden AS, Tas AC. Comparison of titanium soaked in 5 M NaOH or 5 M KOH solutions. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013. [PMID: 23565038 DOI: 10.1016/j.msec.2012.08.047.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Commercially pure titanium plates/coupons and pure titanium powders were soaked for 24 h in 5 M NaOH and 5 M KOH solutions, under identical conditions, over the temperature range of 37° to 90 °C. Wettability of the surfaces of alkali-treated cpTi coupons was studied by using contact angle goniometry. cpTi coupons soaked in 5 M NaOH or 5 M KOH solutions were found to have hydrophilic surfaces. Hydrous alkali titanate nanofibers and nanotubes were identified with SEM/EDXS and grazing incidence XRD. Surface areas of Ti powders increased > 50–220 times, depending on the treatment, when soaked in the above solutions. A solution was developed to coat amorphous calcium phosphate, instead of hydroxyapatite, on Ti coupon surfaces. In vitro cell culture tests were performed with osteoblast-like cells on the alkali-treated samples.
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Affiliation(s)
- Christina Kim
- Oklahoma School of Science and Mathematics, Oklahoma City, OK 73104, USA
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