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Zhang J, Wang M, An J, Shi H, Dai L, Jiao S. Ultra-Stable Ti Vacancies-Pt Atomic Clusters Structure on Titanium Oxycarbide Supports for High Current Density Hydrogen Evolution Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309823. [PMID: 38109127 DOI: 10.1002/smll.202309823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/30/2023] [Indexed: 12/19/2023]
Abstract
Electrocatalysts with low Pt loading mass to achieve high current density (≥1 A cm-2) for hydrogen evolution reaction (HER) are still extremely challenging due to the limited intrinsic activity and weak stability of catalytic sites. The modulation of the electronic microenvironment of the support-Pt structure is crucial to enhance the intrinsic activity and stability of catalytic sites. Herein, an innovative titanium oxycarbide (TiVCO) solid solution with Ti vacancies (TiV) is proposed as support to anchor sub-nanoscale Pt atomic clusters (Pt ACs) and a stable "TiV-Pt ACs" structure is carefully designed. The electronic microenvironment of "TiV-Pt ACs" is indirectly optimized by an unsaturated C/O site near TiV. Thanks to this, novel "TiV-Pt ACs" structure (Pt@TiVCO) with low Pt loading mass (2.44 wt.%) exhibits excellent HER activity in acidic solution and the mass activity is more than ten times that of commercial 20% Pt/C at the overpotentials of 50 and 100 mV. Particularly, Pt@TiVCO shows amazing stability at high and fluctuating current density of 1-2 A cm-2 for 120 h. This work provides a novel and promising method to develop stable and low-loading Pt-based catalysts adapting to high current density.
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Affiliation(s)
- Jintao Zhang
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Mingyong Wang
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, P. R. China
- Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing, 100083, P. R. China
- College of Material Science and Engineering, North China University of Science and Technology, Hebei Province Laboratory of Inorganic Nonmetallic Materials, Tangshan, 063210, P. R. China
| | - Jialiang An
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Haotian Shi
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, P. R. China
| | - Lei Dai
- College of Material Science and Engineering, North China University of Science and Technology, Hebei Province Laboratory of Inorganic Nonmetallic Materials, Tangshan, 063210, P. R. China
| | - Shuqiang Jiao
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing, 100083, P. R. China
- Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals, University of Science and Technology Beijing, Beijing, 100083, P. R. China
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Borges GA, Costa RC, Nagay BE, Sacramento CM, Ruiz KGS, Solano de Almeida L, Rossino LS, Fortulan CA, Rangel EC, Barão VAR, Mesquita MF. Targeting Biomechanical Endurance of Dental-Implant Abutments Using a Diamond-Like Carbon Coating. ACS APPLIED BIO MATERIALS 2023; 6:5630-5643. [PMID: 38052058 DOI: 10.1021/acsabm.3c00802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Abutment components (i.e., fixtures associated with oral implants) are essentially made of titanium (Ti), which is continuously exposed to the hash oral environment, resulting in scratching. Thus, such components need to be protected, and surface treatments are viable methods for overcoming long-term damage. Diamond-like carbon (DLC), an excellent protective material, is an alternative surface-treatment material for Ti abutments. Here, we demonstrate that a silicon interlayer for DLC film growth and the pulsed-direct current plasma-enhanced chemical vapor deposition (DC-PECVD) method enables the deposition of an enhanced protective DLC film. As a result, the DLC film demonstrated a smooth topography with a compact surface. Furthermore, the DLC film enhanced the mechanical (load-displacement, hardness, and elastic modulus) and tribological properties of Ti as well as increased its corrosion resistance (16-fold), which surpassed that of a bare Ti substrate. The biofilm formed (Streptococcus sanguinis) after 24 h exhibited an equal bacterial load (∼7 Log colony-forming units) for both the groups (Ti and DLC). In addition, the DLC film exhibited good cytocompatibility, owing to its noncytotoxicity toward human gingival fibroblast cells. Therefore, DLC deposition via DC-PECVD can be considered to be a promising protective and cytocompatible alternative for developing implant abutments with enhanced mechanical, tribological, and electrochemical properties.
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Affiliation(s)
- Guilherme Almeida Borges
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Raphael Cavalcante Costa
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Bruna Egumi Nagay
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Catharina Marques Sacramento
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Karina Gonzales Silverio Ruiz
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Larissa Solano de Almeida
- Federal University of São Carlos (UFSCar) - Campus Sorocaba, Postgraduate Program in Materials Science, Rodovia João Leme dos Santos, Km 110, Sorocaba, São Paulo 18052-780, Brazil
| | - Luciana Sgarbi Rossino
- Federal University of São Carlos (UFSCar) - Campus Sorocaba, Postgraduate Program in Materials Science, Rodovia João Leme dos Santos, Km 110, Sorocaba, São Paulo 18052-780, Brazil
- State Center of Technological Education "Paula Souza" (CEETEPS), Sorocaba Technology College - Campus Sorocaba (Fatec Sorocaba), Avenida Engenheiro Carlos Reinaldo Mendes, 2015, Sorocaba, São Paulo 18013-280, Brazil
| | - Carlos Alberto Fortulan
- University of São Paulo (USP), Department of Mechanical Engineering, Trabalhador São Carlense 400, São Carlos, São Paulo 13566-590, Brazil
| | - Elidiane Cipriano Rangel
- São Paulo State University (UNESP), Institute of Science and Technology, Laboratory of Technological Plasmas, Avenida Três de Março, 51, Sorocaba, São Paulo 18087-180, Brazil
| | - Valentim A R Barão
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
| | - Marcelo Ferraz Mesquita
- University of Campinas (UNICAMP), Piracicaba Dental School, Department of Prosthodontics and Periodontics, Avenida Limeira, 901, Piracicaba, São Paulo 13414-903, Brazil
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Wu H, Ueno T, Nozaki K, Xu H, Nakano Y, Chen P, Wakabayashi N. Lithium-Modified TiO 2 Surface by Anodization for Enhanced Protein Adsorption and Cell Adhesion. ACS APPLIED MATERIALS & INTERFACES 2023; 15:55232-55243. [PMID: 38014813 DOI: 10.1021/acsami.3c06749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Promoting osseointegration is an essential step in improving implant success rates. Lithium has gradually gained popularity for promoting alkaline phosphatase activity and osteogenic gene expression in osteoblasts. The incorporation of lithium into a titanium surface has been reported to change its surface charge, thereby enhancing its biocompatibility. In this study, we applied anodization as a novel approach to immobilizing Li on a titanium surface and evaluated the changes in its surface characteristics. The objective of this study was to determine the effect of Li treatment of titanium on typical proteins, such as albumin, laminin, and fibronectin, in terms of their adsorption level as well as on the attachment of osteoblast cells. Titanium disks were acid-etched by 66 wt % H2SO4 at 120 °C for 90 s and set as the control group. The etched samples were placed in contact with an anode, while a platinum bar served as the counter electrode. Both electrodes were mounted on a custom electrochemical cell filled with 1 M LiCl. The samples were anodized at constant voltages of 1, 3, and 9 V. Scanning electron microscopy (SEM) and confocal laser scanning microscopy (CLSM) results showed no significant differences in the topography. However, the ζ potentials of the 3 V group were higher than those of the control group at a physiological pH of 7.4. Interestingly, the adsorption level of the extracellular matrix protein was mostly enhanced on the 3 V-anodized surface. The number of attached cells on the Li-anodized surfaces increased. The localization of vinculin at the tips of the stretching cytoplasmic projections was observed more frequently in the osteoblasts on the 3 V-anodized surface. Although the optimal concentration or voltage for Li application should be investigated further, this study suggests that anodization could be an effective method to immobilize lithium ions on a titanium surface and that modifying the surface charge characteristics enables a direct protein-to-material interaction with enhanced biological adhesion.
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Affiliation(s)
- Huaze Wu
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku Tokyo, 113-8549, Japan
| | - Takeshi Ueno
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku Tokyo, 113-8549, Japan
| | - Kosuke Nozaki
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku Tokyo, 113-8549, Japan
| | - Huichuan Xu
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku Tokyo, 113-8549, Japan
| | - Yuki Nakano
- Anton Paar Japan K.K, Riverside Sumida Central Tower Palace, 1-19-9 Tsutsumidori, Sumida City 131-0034, Tokyo, Japan
| | - Peng Chen
- Division of Interdisciplinary Co-Creation (ICC-Division), Liaison Center for Innovative Dentistry, Graduate School of Dentistry, Tohoku University, 4-1 Seiryo-machi, Aoba-ku 980-8575, Sendai, Japan
| | - Noriyuki Wakabayashi
- Department of Advanced Prosthodontics, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku Tokyo, 113-8549, Japan
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Meng XZ, Li XR, Li F, Yan HJ, Zhang QH, Wu LK, Di Tommaso D, Cao FH. Molecular Insights into the Stability of Titanium in Electrolytes Containing Chlorine and Fluorine Ions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38031448 DOI: 10.1021/acs.langmuir.3c02484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Titanium and its alloys are protected by a compact and stable passive film, which confers resistance to corrosion by the primary halogen chloride (Cl-) while being less effective against fluoride (F-). Although researchers have recognized different macroscopic corrosion effects of these halide ions on titanium, the underlying mechanisms remain largely unexplored. In this work, the bonding of Cl-/F- with stable passive films was studied in neutral and acidic (pH = 2.3) conditions. The synergistic effect between the interfacial hydrogen bond (HB) structure and halogens on titanium corrosion was first revealed using first-principles calculation and Raman spectroscopy. F- forms more stable halogen-Ti bonds than Cl-, resulting in titanium degradation. The proton combined with F- exhibits a specific synergistic effect, causing corrosion of the passive film. The water hydrogen bond transformation index (HBTI) at the titanium/aqueous interface was 1.88 in an acidic solution containing F-, significantly higher than that in neutral/acid solutions containing Cl- (1.80/1.81) and a neutral solution containing F- (1.81). This work clarifies the structure-activity relationship between HBTI and the destruction of titanium passive films. We propose that the microstructure of the interfacial HB is an undeniable factor in the corrosion of titanium.
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Affiliation(s)
- Xian-Ze Meng
- School of Materials, Sun Yat-sen University, Shenzhen 518107, China
| | - Xin-Ran Li
- School of Materials, Sun Yat-sen University, Shenzhen 518107, China
| | - Fei Li
- Engineering Research Center of Seawater Utilization of Ministry of Education, School of Chemical Engineering and Technology, Hebei University of Technology, Tianjin 300130, China
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, , Mile End Road, London E1 4NS, U.K
| | - Hao-Jie Yan
- School of Materials, Sun Yat-sen University, Shenzhen 518107, China
| | - Qin-Hao Zhang
- School of Materials, Sun Yat-sen University, Shenzhen 518107, China
| | - Lian-Kui Wu
- School of Materials, Sun Yat-sen University, Shenzhen 518107, China
| | - Devis Di Tommaso
- Department of Chemistry, School of Physical and Chemical Sciences, Queen Mary University of London, , Mile End Road, London E1 4NS, U.K
- Digital Environment Research Institute (DERI), Empire House, 67-75 New Road, London E1 1HH, U.K
| | - Fa-He Cao
- School of Materials, Sun Yat-sen University, Shenzhen 518107, China
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Brocklebank M, Feltham H, Noël J, Goncharova L. Mechanism of titanium electrochemical oxidation via isotopic labeling, high resolution ion depth profiling, and impedance spectroscopy. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu Q, Liu H, Xie J, Zhang WF, Zhang YM, Feng C, Li GS, Yu Y, Song SY, Yin CX. Influence of Ru on structure and corrosion behavior of passive film on Ti-6Al-4V alloy in oil and gas exploration conditions. Sci Rep 2022; 12:16586. [PMID: 36198740 PMCID: PMC9535010 DOI: 10.1038/s41598-022-21047-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Accepted: 09/22/2022] [Indexed: 11/18/2022] Open
Abstract
In order to investigate the influence of minor Ru on the electrochemical behaviour and structural characteristics of passive films on the surface of Ti-6Al-4V alloys under various oil and gas exploration conditions, electrochemical techniques, X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and corrosion simulation tests were carried out. The results revealed that the oil and gas exploration conditions had a serious impact on the electrochemical behaviour and corrosion resistance of the tested alloys. The passivation film resistance and corrosion potential of the tested titanium alloys were significantly reduced with increasing acidity and temperature. With the addition of minor ruthenium, the potential of the passive film on the Ti-6Al-4V-0.11Ru alloy surface increased because of the high surface potential of the ruthenium element. The contents of metallic ruthenium and tetravalent titanium oxide TiO2 in the surface film of the Ti-6Al-4V-0.11Ru alloy both increased with increasing temperature, which led to increase the thickness, stability, corrosion resistance and repairability of the passive film on the surface of the Ti-6Al-4V-0.11Ru alloy being better than those qualities of Ti-6Al-4V. These results were also confirmed by corrosion simulation tests.
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Affiliation(s)
- Qiang Liu
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China
| | - Hongtao Liu
- Petroleum Engineering Institute, Tarim Oil Field Company of CNPC, Kuerle, 841000, Xinjiang, China
| | - Junfeng Xie
- Petroleum Engineering Institute, Tarim Oil Field Company of CNPC, Kuerle, 841000, Xinjiang, China
| | - Wei-Fu Zhang
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China
| | - Yi-Ming Zhang
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China.,School of Materials Science and Engineering, Xi'an University of Technology, No.5 Jinhua South Road, Xi'an, 710048, China
| | - Chun Feng
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China
| | - Guang-Shan Li
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China
| | - Yang Yu
- State Key Lab of Nonferrous Metals and Processes, GRINMAT Engineering Institute Co, Ltd., No. 11, Xingke East Street, Beijing, 101400, China.
| | - Sheng-Yin Song
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China
| | - Cheng-Xian Yin
- State Key Laboratory for Performance and Structural Safety of Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, No. 89, Jinye 2Nd Road, Xi'an, 710077, Shaanxi, China
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Hanawa T. Biocompatibility of titanium from the viewpoint of its surface. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2022; 23:457-472. [PMID: 35990790 PMCID: PMC9389932 DOI: 10.1080/14686996.2022.2106156] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Accepted: 07/19/2022] [Indexed: 06/15/2023]
Abstract
Among metals, Ti and majority of its alloys exhibit excellent biocompatibility or tissue compatibility. Although their high corrosion resistance is a factor in the biocompatibility of Ti and Ti alloys, it is clear that other factors exist. In this review, the corrosion resistance and passive film of Ti are compared to those of other metallic biomaterials, and their band gap energies, Egs, are compared to discuss the role of Eg in the reactivity with living tissues. From the perspective of the material's surface, it is possible to explain the excellent biocompatibility of Ti by considering the following factors: Ti ions are immediately stabilized not to show toxicity if it is released to body fluids; good balance of positive and negative charges by the dissociation of surface hydroxyl groups on the passive film; low electrostatic force of the passive film inducing a natural adsorption of proteins maintaining their natural conformation; strong property as n-type semiconductor; lower band gap energy of the passive film on Ti generating optimal reactivity; and calcium phosphate formation is caused by this reactivity. The results suggest that due to the passive oxide film, the optimal balance between high corrosion resistance and appropriate reactivity of Ti is the predominate solution for the excellent biocompatibility of Ti.
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Affiliation(s)
- Takao Hanawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
- Center for Advanced Medical Engineering Research and Development, Kobe University, Kobe, Japan
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Osaka, Japan
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Kim SC, Hanawa T, Manaka T, Tsuchiya H, Fujimoto S. Band structures of passive films on titanium in simulated bioliquids determined by photoelectrochemical response: principle governing the biocompatibility. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2022; 23:322-331. [PMID: 35557510 PMCID: PMC9090409 DOI: 10.1080/14686996.2022.2066960] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/01/2022] [Accepted: 04/11/2022] [Indexed: 06/15/2023]
Abstract
The band structures and band gap energies, E g, of passive films formed on titanium (Ti) in simulated bioliquids, Hanks' solution (Hanks) and saline, were evaluated. Ti was polarized at 0, -0.1, and -0.2 VAg/AgCl, E f, for 1 h. After polarization, the surfaces were characterized using X-ray photoelectron spectroscopy, and the photoelectrochemical responses were evaluated. The current change during photoirradiation was recorded as a photocurrent transient at each measuring potential, E m, and by changing the wavelength of the incident light. Passive films consisted of a very thin TiO2 layer containing small amounts of Ti2O3 and TiO, hydroxyl groups, and water. During polarization in Hanks, calcium and phosphate ions were incorporated or formed calcium phosphate but not in saline. Calcium phosphate and hydroxyl groups influenced the band structure. E g was graded in Hanks but constant in saline, independent of E f and E m. The passive film on Ti behaved as an n-type semiconductor containing two layers: an inner oxide layer with a large E g and an outer hydroxide layer with a small E g. In Hanks, E g was 3.3-3.4 eV in the inner oxide layer and 2.9 eV in the outer hydroxide layer. In saline, E g was 3.3 eV in the inner layer and 2.7 eV in the outer layer. Calcium phosphate and hydroxyl groups influenced the band structure of the passive film. The E g of the outermost surface was smaller than that of TiO2 ceramics, which is probably one of the principles of the excellent biocompatibility of Ti among metals.
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Affiliation(s)
- Seong-Cheol Kim
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
| | - Takao Hanawa
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
- Center for Advanced Medical Engineering Research and Development, Kobe University, Kobe, Japan
| | - Tomoyo Manaka
- Graduate school of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU), Tokyo, Japan
| | - Hiroaki Tsuchiya
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
| | - Shinji Fujimoto
- Division of Materials and Manufacturing Science, Graduate School of Engineering, Osaka University, Suita, Osaka, Japan
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Eda Y, Manaka T, Hanawa T, Chen P, Ashida M, Noda K. X‐ray photoelectron spectroscopy‐based valence band spectra of passive films on titanium. SURF INTERFACE ANAL 2022. [DOI: 10.1002/sia.7102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yuzuki Eda
- Department of Materials Science and Engineering Shibaura Institute of Technology Tokyo Japan
| | - Tomoyo Manaka
- Department of Metallic Biomaterials Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo Japan
| | - Takao Hanawa
- Institute of Bomaterials and Bioengineering, Tokyo Medical and Dental University Tokyo Japan
- Center for Advanced Medical Engineering Research & Development Kobe University Kobe Japan
| | - Peng Chen
- Department of Metallic Biomaterials Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo Japan
| | - Maki Ashida
- Department of Metallic Biomaterials Graduate School of Medical and Dental Science, Tokyo Medical and Dental University Tokyo Japan
| | - Kazuhiko Noda
- Department of Materials Science and Engineering Shibaura Institute of Technology Tokyo Japan
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10
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Yuan X, Zhu Y, Li S, Wu Y, Wang Z, Gao R, Luo S, Shen J, Wu J, Ge L. Titanium nanosheet as robust and biosafe drug carrier for combined photochemo cancer therapy. J Nanobiotechnology 2022; 20:154. [PMID: 35331256 PMCID: PMC8944145 DOI: 10.1186/s12951-022-01374-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/12/2022] [Indexed: 11/18/2022] Open
Abstract
Two-dimensional (2D) Titanium nanosheets (Ti NSs) have shown many excellent properties, such as nontoxicity, satisfactory photothermal conversion efficacy, etc. However, the biomedical applications of Ti NSs have not been intensively investigated. Herein, we synthesized a multifunctional Ti NS drug delivery system modified with polydopamine/polyethylene glycol (Ti@PDA-PEG) and applied simultaneously for photothermal therapy and chemotherapy. Doxorubicin (DOX) was utilized as a model drug. Ti@PDA-PEG NS shows an ultrahigh antitumor drug DOX loading (Ti@PDA-PEG-DOX). The prepared Ti@PDA-PEG-DOX NS as robust drug delivery system demonstrates great stability and excellent multi-response drug-release capabilities, including pH-responsive and near-infrared -responsive behavior and obviously high photothermal efficiency. Both in vitro and in vivo experimental results have shown high biosafety and outstanding antitumor effects. Therefore, this work exhibits the enormous potential of a multifunctional platform in the treatment of tumors and may stimulate interest in the exploration of other new 2D nanomaterials for biomedical applications.
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Affiliation(s)
- Xiaoli Yuan
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Ying Zhu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Shasha Li
- School of Pharmacy, Xinjiang Medical University, Xinjiang, 830000, China
| | - Yiqun Wu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Zhongshi Wang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Rui Gao
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Shiyao Luo
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Juan Shen
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China
| | - Jun Wu
- School of Biomedical Engineering, Sun Yat-Sen University, Guangzhou, 510006, China.
| | - Liang Ge
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, No. 24 Tongjia Xiang, Nanjing, 210009, China.
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11
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Kadakia RJ, Wixted CM, Kelly CN, Hanselman AE, Adams SB. From Patient to Procedure: The Process of Creating a Custom 3D-Printed Medical Device for Foot and Ankle Pathology. Foot Ankle Spec 2021; 14:271-280. [PMID: 33269644 DOI: 10.1177/1938640020971415] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three-dimensional (3D) printing technology has advanced greatly over the past decade and is being used extensively throughout the field of medicine. Several orthopaedic surgery specialties have demonstrated that 3D printing technology can improve patient care and physician education. Foot and ankle pathology can be complex as the 3D anatomy can be challenging to appreciate. Deformity can occur in several planes simultaneously and bone defects either from previous surgery or trauma can further complicate surgical correction. Three-dimensional printing technology provides an avenue to tackle the challenges associated with complex foot and ankle pathology. A basic understanding of how these implants are designed and made is important for surgeons as this technology is becoming more widespread and the clinical applications continue to grow within foot and ankle surgery.Levels of Evidence: Level V.
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Affiliation(s)
- Rishin J Kadakia
- Department of Orthopaedic Surgery, Duke University Durham, North Carolina
| | - Colleen M Wixted
- Department of Orthopaedic Surgery, Duke University Durham, North Carolina
| | - Cambre N Kelly
- Department of Orthopaedic Surgery, Duke University Durham, North Carolina
| | - Andrew E Hanselman
- Department of Orthopaedic Surgery, Duke University Durham, North Carolina
| | - Samuel B Adams
- Department of Orthopaedic Surgery, Duke University Durham, North Carolina
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Hu N, Xie L, Liao Q, Gao A, Zheng Y, Pan H, Tong L, Yang D, Gao N, Starink MJ, Chu PK, Wang H. A more defective substrate leads to a less defective passive layer: Enhancing the mechanical strength, corrosion resistance and anti-inflammatory response of the low-modulus Ti-45Nb alloy by grain refinement. Acta Biomater 2021; 126:524-536. [PMID: 33684537 DOI: 10.1016/j.actbio.2021.02.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 02/24/2021] [Accepted: 02/28/2021] [Indexed: 01/04/2023]
Abstract
Orthopedic and dental implants made of β-type Ti alloys have low elastic modulus which can better relieve the stress shielding effects after surgical implantation. Nevertheless, clinical application of β-type Ti alloys is hampered by the insufficient mechanical strength and gradual release of pro-inflammatory metallic ions under physiological conditions. In this study, the β-type Ti-45Nb alloy is subjected to high-pressure torsion (HPT) processing to refine the grain size. After HPT processing, the tensile strength increases from 370 MPa to 658 MPa due to grain boundary strengthening and at the same time, the favorable elastic modulus is maintained at a low level of 61-72 GPa because the single β-phase is preserved during grain refinement. More grain boundaries decrease the work function and facilitate the formation of thicker and less defective passive films leading to better corrosion resistance. In addition, more rapid repair of the passive layer mitigates release of metallic ions from the alloy and consequently, the inflammatory response is suppressed. The results reveal a strategy to simultaneously improve the mechanical and biological properties of metallic implant materials for orthopedics and dentistry. STATEMENT OF SIGNIFICANCE: The low modulus Ti-45Nb alloy is promising in addressing the complication of stress shielding induced by biomedical Ti-based materials with too-high elastic modulus. However, its insufficient strength hampers its clinical application, and traditional strengthening via heat treatments will compromise the low elastic modulus. In the current study, we enhanced the ultimate tensile strength of Ti-45Nb from 370 MPa to 658 MPa through grain-refinement strengthening, while the elastic modulus was maintained at a low value (61-72 GPa). Moreover, substrate grain-refinement has been proved to improve the corrosion resistance of Ti-45Nb with reduced inflammatory response both in vitro and in vivo. A relationship between the substrate microstructure and the surface passive layer has been established to explain the beneficial effects of substrate grain-refinement.
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Affiliation(s)
- Nan Hu
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; National Innovation Center for Advanced Medical Devices, Shenzhen, China
| | - Lingxia Xie
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Qing Liao
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Ang Gao
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yanyan Zheng
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Haobo Pan
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Liping Tong
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
| | - Dazhi Yang
- Department of Spinal Surgery, The 6th Affiliated Hospital of Shenzhen University Health Science Center, Shenzhen, China.
| | - Nong Gao
- Engineering Materials group, University of Southampton, Southampton SO17 1BJ, UK
| | - Marco J Starink
- Engineering Materials group, University of Southampton, Southampton SO17 1BJ, UK
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China
| | - Huaiyu Wang
- Center for Human Tissues and Organs Degeneration, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China.
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Engelkamp B, Schierbaum K. Oxygen Sensing of Pt/PEO-TiO 2 in Humid Atmospheres at Moderate Temperatures. SENSORS (BASEL, SWITZERLAND) 2021; 21:2558. [PMID: 33917432 PMCID: PMC8038718 DOI: 10.3390/s21072558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/29/2021] [Accepted: 04/03/2021] [Indexed: 11/29/2022]
Abstract
Here, we show that the presence of adsorbed water improves the oxygen-sensing properties of Pt/TiO2 at moderate temperatures. The studied interface is based on porous plasma electrolytic oxidized titanium (PEO-TiO2) covered with platinum clusters. The electrical resistance across Pt/PEO-TiO2 is explained by an electronic depletion layer. Oxygen adsorbates further increase the depletion by inducing extrinsic interface states, which are occupied by TiO2 conduction band electrons. The high oxygen partial pressure in ambient air substantially limits the electron transport across the interface. Our DC measurements at defined levels of humidity at 30 ∘C show that adsorbed water counteracts this shortcoming, allowing oxygen sensing at room conditions. In addition, response and recovery times from temporal oxygen exposure decrease with humidity. We attribute the effects to competing adsorption processes and reactions of water with adsorbed oxygen species and/or lattice oxygen, which involve electron re-injection to the TiO2 conduction band. Elevated temperatures up to 170 ∘C attenuate the effects, presumably due to the lower binding strength to the surface of molecular water compared with oxygen adsorbates.
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Affiliation(s)
- Bernd Engelkamp
- Abteilung für Materialwissenschaft, Institut für Experimentelle Physik der Kondensierten Materie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, 40225 Düsseldorf, Germany;
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14
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Hiji A, Hanawa T, Yokoi T, Chen P, Ashida M, Kawashita M. Time Transient of Calcium and Phosphate Ion Adsorption by Rutile Crystal Facets in Hanks' Solution Characterized by XPS. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3597-3604. [PMID: 33749278 DOI: 10.1021/acs.langmuir.0c03540] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
For the elucidation of the mechanism of calcium phosphate formation on commercially pure titanium (CP Ti) in the human body, rutile TiO2 single crystal plates with (001), (110), and (111) facets, namely, TiO2(001), TiO2(110), and TiO2(111), and polycrystalline plates (TiO2(poly)) were immersed in a simulated body fluid, Hanks' solution (Hanks), for 100-105 s, and the adsorption of calcium and phosphate ions was precisely characterized employing X-ray photoelectron spectroscopy (XPS). Previously published CP Ti data were used for comparison. Prior to immersion in Hanks, oxygen content was more than twice as high as that of titanium due to the existence of hydroxyl groups and water on the oxides. After immersion in Hanks, the composition and chemical state of the TiO2 substrates remained unchanged. Among the electrolytes contained in Hanks, only calcium and phosphate ions were adsorbed by and incorporated onto TiO2 surfaces. Adsorption of calcium ions onto rutile did not exhibit any systematic increase of calcium with immersion time except TiO2(poly). Adsorption of phosphate ions was initially constant, followed by an increase with the logarithm of immersion time. The adsorption rate of phosphate ions decreased in the following order: TiO2(001), TiO2(poly), TiO2(111), CP Ti, and TiO2(110). The coordination number and band gap of each crystal facet of rutile is important for the adsorption and incorporation of phosphate ions. Regular calcium phosphate formation on CP Ti is possibly enabled by the surface oxide film, which consists chiefly of amorphous TiO2. However, calcium phosphate formation kinetics on CP Ti differed from those on the TiO2 crystalline phase. These findings may further the understanding of CP Ti hard tissue compatibility.
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Affiliation(s)
- Akari Hiji
- Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
| | - Takao Hanawa
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
- Center for Advanced Medical Engineering Research & Development, Kobe University, 1-5-1 minatojima-minamimachi, Chuo-ku, Kobe 650-0047, Japan
| | - Taishi Yokoi
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
| | - Peng Chen
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
| | - Maki Ashida
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
| | - Masakazu Kawashita
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo 101-0062, Japan
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15
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Hiji A, Hanawa T, Shimabukuro M, Chen P, Ashida M, Ishikawa K. Initial formation kinetics of calcium phosphate on titanium in Hanks' solution characterized using XPS. SURF INTERFACE ANAL 2020. [DOI: 10.1002/sia.6900] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Akari Hiji
- Graduate School of Medical and Dental Sciences Tokyo Medical and Dental University Tokyo Japan
| | - Takao Hanawa
- Institute of Biomaterials and Bioengineering Tokyo Medical and Dental University Tokyo Japan
- Center for Advanced Medical Engineering Research and Development Kobe University Kobe Japan
| | - Masaya Shimabukuro
- Department of Biomaterials, Faculty of Dental Science Kyushu University Fukuoka Japan
| | - Peng Chen
- Institute of Biomaterials and Bioengineering Tokyo Medical and Dental University Tokyo Japan
| | - Maki Ashida
- Institute of Biomaterials and Bioengineering Tokyo Medical and Dental University Tokyo Japan
| | - Kunio Ishikawa
- Department of Biomaterials, Faculty of Dental Science Kyushu University Fukuoka Japan
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Asserghine A, Medvidović-Kosanović M, Nagy L, Nagy G. In situ monitoring of the transpassivation and repassivation of the passive film on nitinol biomaterial by scanning electrochemical microscopy. Electrochem commun 2019. [DOI: 10.1016/j.elecom.2019.106539] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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17
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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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18
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Zhou X, Fu X, Chen H, Xiao Z, Min L, Zhou Y, Zhu X, Zhang K, Tu C, Zhang X. Evaluation and regulation of the corrosion resistance of macroporous titanium scaffolds with bioactive surface films for biomedical applications. J Mater Chem B 2019. [DOI: 10.1039/c8tb03359e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A three-layer bioactive film on porous titanium was constructed and evaluated for its corrosion resistance via electrochemical analysis.
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Affiliation(s)
- Xingyu Zhou
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Xi Fu
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Hongjie Chen
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Zhanwen Xiao
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Li Min
- Department of Orthopaedics
- West China Hospital of Sichuan University
- Chengdu 610041
- China
| | - Yong Zhou
- Department of Orthopaedics
- West China Hospital of Sichuan University
- Chengdu 610041
- China
| | - Xiangdong Zhu
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Kai Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
| | - Chongqi Tu
- Department of Orthopaedics
- West China Hospital of Sichuan University
- Chengdu 610041
- China
| | - Xingdong Zhang
- National Engineering Research Center for Biomaterials
- Sichuan University
- Chengdu 610064
- China
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