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Screening the Optimal Patterned Surfaces Consisting of Cell Morphology Mimicking Micro-pillars and nanotube arrays for the Design of Titanium Implants#br#

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Journal of Bionic Engineering 2021年第2期18卷 361-374页

作者： Ping Zhou Hongjiao Li Feifei Mao Hongxin Huang Siqi Long Fei He Jing Chen Shicheng Wei School and Hospital of Stomatology Lanzhou UniversityLanzhou 730000China Central Laboratory Peking University School and Hospital of StomatologyBeijing 100081China Institute of Microelectronics Peking UniversityBeijing 100871China

Micron/nano scale topographic modification has been a significant focus of interest in current titanium(Ti)surface ***,the influence of micron/nano structured surface on cell or bacterium behavior on the Ti implant has rarely been systematically ***,except for popular microgrooves,little work has been carried out on the reaction of cells to the bionic *** this study,several micro-pillars mimicking cell morphology were prepared on Ti surfaces by lithography and contact printing(ICP)method,and they were further decorated with nanotube arrays by anodization *** surface modifications remarkablly increased the surface roughness of pristine Ti surface from 91.17 nm±5.57 nm to be more than 1000 nm,and reduced their water contact angles from 68.3°±0.7°to be 16.9°±2.4°.Then,the effects of these hierarchical micron/nano scale patterns on the behaviors of MG63 osteoblasts,L929 fibroblasts,SCC epithelial cells and *** were studied,aiming to evaluate their performance in osseointegration,gingival epithelial sealing and antibacterial *** an innovative scoring strategy,our findings showed that square micro-pillars with 6μm width and 2μm height combined with 85 nm diameter nanotubes was suitable for implant neck design,while square micro-pillars with 3μm width and 3.6μm height combined with 55 nm diameter nanotubes was the best for implant body *** study reveals the synergistic effect of the hierarchical micron/nano scale patterns on MG63 osteoblasts,L929 fibroblasts,SCC epithelial cells and *** *** provides insight into the design of biomedical implant surfaces.

关键词： hierarchical micron/nano design cell-like patterns nanotube arrays titanium implants implant osseointegration

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Robust S-doped TiO_(2)@N,S-codoped carbon nanotube arrays as free-binder anodes for efficient sodium storage

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Journal of Energy Chemistry 2021年第2期30卷 175-184,I0007页

作者： Guangzeng Liu Man Huang Zhengchunyu Zhang Baojuan Xi Haibo Li Shenglin Xiong School of Chemistry and Chemistry Engineering Qilu Normal UniversityJinan 250200ShandongChina Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical Engineeringand State Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100ShandongChina School of Chemistry and Chemical Engineering Liaocheng UniversityLiaocheng 252059ShandongChina

Titanium dioxide(TiO_2) has been investigated broadly as a stable,safe,and cheap anode material for sodium-ion batteries in recent ***,the poor electronic conductivity and inherent sluggish sodium ion diffusion hinder its practical ***,a self-template and in situ vulcanization strategy is developed to synthesize self-supported hybrid nanotube arrays composed of nitrogen/sulfur-codoped carbon coated sulfur-doped TiO_2 nanotubes(S-TiO_2@NS-C) starting from H_2 Ti_2 O_5-H_2 O *** S-TiO_2@NS-C composite with one-dimensional nano-sized subunits integrates several ***,sulfur doping strongly improves the Na~+ storage ability of TiO_2@C-N nanotubes by narrowing the bandgap of original TiO_*** from the nanoarrays structures built from hollow nanotubes,carbon layer and sulfur doping,the sluggish Na~+ insertion/extraction kinetics is effectively improved and the volume variation of the electrode material is significantly *** a result,the S-TiO_2@NS-C nanoarrays present efficient sodium storage *** greatly improved sodium storage performances of S-TiO_2@NS-C nanoarrays confirm the importance of rational engineering and synthesis of hollow array architectures with higher complexity.

关键词： Hollow structures nanotube arrays S-doped TiO_(2) N S-codoped carbon Sodium-ion batteries

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Effects of pretreatment of substrates on the preparation of large scale ZnO nanotube arrays

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Rare Metals 2010年第1期29卷 21-25页

作者： GUO Xiao GUO Min ZHANG Mei WANG Xidong CHOU Kuo-Chih Department of Physical Chemistry. University qfScience and Technology Beijing Beijing 100083 China College of Engineering Peking University Beijing 100871 China

Well-aligned hexagonal ZnO nanotubes （NTs） arrays were synthesized on pretreated indium tin oxide （ITO） substrates by a simple hydro- thermal method. The morphology and structure of the products were characterized by scanning electron microscopy （SEM） and X-ray diffraction analysis （XRD）. A new method of substrate pretreatment was introduced to prepare ZnO coated films. The size of ZnO seeds and the formation rate of ZnO NTs were investigated. Further, the mechanism of the preparation of ZnO NTs was discussed. The photoluminescence （PL） spectrum measurement shows fairly internal defects existing in ZnO nanotubes.

关键词： nanotube arrays zinc oxide substrate pretreatment hydrothermal method annealing time

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Synthesis and Magnetic Properties of CuFe_2O_4 nanotube arrays

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Journal of Wuhan University of Technology(Materials Science) 2012年第3期27卷 550-554页

作者：高华高大强 Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University

CuFe2O4 nanotube arrays with different outer diameters were synthesized in anodic aluminum oxide templates through sol-gel techniques followed by heating treatment processes. The morphology of the nanotube arrays was investigated by field emission scanning electron microscope and transmission electron microscopy, suggesting that the nanotube arrays are ordered and uniform. The X-ray diffraction results indicate that the crystal structure of the nanotube arrays is polycrystalline with a spinel-type structure. The measurements of magnetic properties indicate that CuFe2O4 nanotube arrays with outer diameter of 200 nm exhibit magnetic anisotropy with easy magnetization direction along the axis of nanotubes.

关键词： nanotube arrays CuFe2O4 sol-gel magnetic properties

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Morphology dependence of TiO_2 nanotube arrays on anodization variables and buffer medium

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Journal of Semiconductors 2010年第6期31卷 22-26页

作者：文鑫曹萌吴杰陶俊超孙艳戴宁 National Laboratory for Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences

Vertically oriented TiO_2 nanotube arrays were prepared by potentiostatic anodization of Ti foils in HF/acetic acid（HAC） aqueous *** variables including anodization electrolyte concentration,anodization voltage, anodization time and buffer medium can be chosen and adjusted to manipulate the nanotube arrays to give the required length and morphology.

关键词： TiO_2 nanotube arrays anodization

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Preparation and Optical Properties of V_2O_5 nanotube arrays

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Journal of Wuhan University of Technology(Materials Science) 2006年第1期21卷 38-41页

作者：余华陈文 School of Materials Science and Engineering Wuhan University of TechnologyWuhan 430070 China

V2 O5 nanotube arrays in porous atomic alumina （ PAA ） template were obtained from V2O5 sols prepared by melt quenching method. X-ray powder diffraction and selected area electron diffraction investigations demonstrate that V2O5 nanotubes are orthorhombic. Results by scanning electron mieroscopy and transmission electron microscopy results shove that V2O5 nanotubes with a uniform diameter form highly ordered arrays. The diameter and length of the nanotubes depend on the pore diameter and the thickness of the PAA template used. It is proved that the sol-gel template process is a cost-saving , simple and readily-controlled method to prepare metal oxides nanomaterials .Owing to the quantum size effect. the optical absorption edge of V2O5 nanotubes in PAA ehibits a significant blue shift with respect to that of bulk V2O5.

关键词： V2O5 nanotube arrays porous anodic alumina template sol-gel optical properties

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TiO2形貌调控及其对光催化CO2还原活性的研究

TiO2形貌调控及其对光催化CO2还原活性的研究

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作者： Low Jingxiang 武汉理工大学

学位级别：硕士

With the rapid increasing of enormous challenges in energy demands and environmental pollution ignited by fossil fuels consumption, developing of renewable and green technologies for energy production has aroused widespread concern in the past few decades. Among various proposed technologies, semiconductor-based photocatalysis for CO2 reduction have been known as one of the most perspective strategies because of its potential in renewable energy creation and environmental remedies. In details, photocatalysis CO2 reduction can transform the green-house gas(CO2) into the valuable solar fuels such as CH4, HCO2 H, CH2 O and CH3 OH. This outstanding ability of the photocatalysis CO2 reduction is the main motivation for the searching of efficient and visible-light active photocatalyst. After years of research and development, many semiconductors have been assayed and explored to be used as an effective photocatalyst for photocatalysis CO2 reduction, such as Ti O2, Cd S, g-C3N4, Zn O and Bi2WO6. However, the practical application of photocatalysis CO2 reduction is still limited by its low CO2 conversion efficiency due to the fast charge carriers recombination and low light utilization. Among these semiconductors, Ti O2 has regarded as the most promising photocatalyst because of its low cost, environmentally friendliness and excellent photostability. However, Ti O2 owns low photoconversion efficiency even in the UV-region due to its large bandgap, less photocatalytic reaction site, low electron mobility and short minority carrier diffusion length. Several strategies have been carried out to improve the photoconversion efficiency of the Ti O2, such as extending the Ti O2 absorption to visible light, boosting electron and hole lifetimes through doping and loading metals, and increasing the surface area by building a porous *** tuning is an effective way to enhance the photocatalytic activity of the photocatalyst. Nowadays, there is an enormous interest in con

关键词： TiO2 CO2 reduction facets nanotube arrays photonic crystal

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