RSC Advances
·
2024
·Vol. 14
·期 6
·3698-3711
·
IF 3.9
Jing Zhan,Li Li,Lili Yao,Zheng Cao,Weiwei Lou,Jianying Zhang,Jinsong Liu,Litao Yao
Modifying the drug-release capacity of titanium implants is essential for maintaining their long-term functioning. Titanium dioxide nanotube (TNT) arrays, owing to their drug release capacity, are commonly used in the biomaterial sphere. Their unique half open structure and arrangement in rows increase the drug release capacity. However, their rapid drug release ability not only reduces drug efficiency but also produces excessive local and systemic deposition of antibiotics. In this study, we designed a tantalum-coated TNT system for drug-release optimization. A decreased nanotube size caused by the tantalum nanocoating was observed through SEM and analyzed (TNT: 110 nm, TNT-Ta1: 80 nm, TNT-Ta3: 40 nm, TNT-Ta5: 20 nm, TNT-Ta7: <5 nm). XPS analysis revealed the distribution of the chemical components, especially that of the tantalum element. In vitro experiments showed that the tantalum nanocoating enhanced cell proliferation; in particular, TNT-Ta5 possessed the best cell viability (about 1.18 of TNT groups at 7d). It also showed that the tantalum nanocoating had a positive effect on osteogenesis (especially TNT-Ta5 and TNT-Ta7). Additionally, hydrophilic/hydrophobic drug (vancomycin/raloxifene) release results indicated that the TNT-Ta5 group possessed the most desirable sustained release capacity. Moreover, in this drug release system, the hydrophobic drug showed more sustained release capacity than the hydrophilic drug (vancomycin: sustained release for more than 48 h, raloxifene: sustained release for more than 168 h). More importantly, TNT-Ta5 is proved to be an appropriate drug release system, which possesses cytocompatibility, osteogenic capacity, and sustained drug release capacity.
研究领域:
生物材料学
·
医学工程
·
组织工程
✓ 已验证
DOI
PubMed
高影响因子
TRIBOLOGY INTERNATIONAL
·
2023
·
IF 6.2
Xiaojing Fu,Shuming Guo,Yong Wan,Changsheng Zheng,Qiang Li,Bingchang Liu
Superlubricity was achieved by the addition of copper nanoparticles (CuNPs) as an additive to glycerol, a sustainable lubricant, which was applied to TiN-coated steel that underwent ball-on-flat reciprocating testing at an average contact pressure of 54.6 MPa. A coefficient of friction of ∼ 0.007 and a wear rate of 2.0 × 10 –8 mm 3 /N m were achieved on the TiN coating when lubricated with glycerol + 0.1 wt% CuNPs at a sliding speed of 120 mm/s. XPS and Raman analysis suggested that a surface tribofilm containing CuNPs and a carbon-based film derived from the degradation of glycerol were deposited onto the contact area of the tribopairs, which effectively prevented the direct asperity contact between the steel ball and TiN-coated steel, enabling ultra-low friction.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2014
·
IF 3.511
Juan Bian,Yun Xue,Kai Yao,Xue Gu,Chao Yan,Yan Wang
A novel strategy for selectively adsorbing phospholipids (PLs) on titania-coated silica core–shell microspheres (TiO 2 /SiO 2 ) was developed. The TiO 2 /SiO 2 microspheres were prepared through water-vapor-induced internal hydrolysis and then characterized by SEM, UV–vis spectroscopy, X-ray diffraction, and measurements of Brunauer–Emmett–Teller surface area. Analyses showed that the titania layer was uniformly distributed onto the surface of silica particles. The TiO 2 /SiO 2 microspheres were employed as sorbent in solid-phase extraction (SPE), and their absorptive ability was investigated by reversed-phase liquid chromatography–evaporative light scattering detection (RPLC–ELSD). Important factors that affect the extraction, such as loading buffer, eluting buffer, and elution volume, were investigated in detail and optimized by using standard samples. Results reveal that the developed SPE approach had higher recoveries for PLs than that based on pure TiO 2 particles. The proposed SPE method was used for extraction of PLs from serum and showed great potential for identifying more kinds of endogenous PL metabolites by ultra performance liquid chromatography with quadrupole time-of-flight mass spectrometry (UPLC–QTOF MS). The proposed SPE method with the composite sorbent was used to screen PLs from a biological matrix with high selectivity and efficiency. This approach is a promising method for selective extraction of PLs in lipidomics or phospholipidomics.
研究领域:
分析化学
·
代谢组学
·
生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Bin Li,Jing Xue,Xin Lv,Ruochen Zhang,Kaixuan Ma,Xianwen Wu,Lei Dai,Ling Wang,Zhangxing He
Rechargeable aqueous zinc ion batteries have attracted significant attention because of their non-toxicity, high theoretical capacity, and low cost. However, many challenges regarding zinc anodes have hindered the development of zinc ion batteries , such as the growth of zinc dendrites, passivation and hydrogen evolution . In this study, a simple strategy based on porous rutile nano-TiO 2 coating was used to guide uniform deposition of zinc ions to inhibit the formation of zinc dendrite. The TiO 2 coated zinc anode shows excellent electrochemical performance . Therefore, for Zn Zn symmetric cell, the zinc anode protected by TiO 2 coating shows reduced voltage hysteresis (50 mV at 0.4 mA cm −2 ). Moreover, for Zn-MnO 2 full cell, the cell with TiO 2 coating also shows excellent cycling performance. The discharge capacity of Zn-MnO 2 full cell is only 27.69 mAh g −1 after 500 cycles, while discharge capacity of Zn@TiO 2 -MnO 2 full cell is up to 89.14 mAh g −1 . This excellent electrochemical performance may be attributed to improved wettability of TiO 2 coated zinc anode, the uniform deposition of Zn 2+ and reduction of Zn dendrites. Overall, this study provides a simple and beneficial strategy for future development of rechargeable aqueous zinc ion batteries .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Express
·
2021
·Vol. 11
·期 12
·2015-2023
·
IF 0
Han Zhaohui,Xu Yang,Xu Lei,Guo Shenghui
In this research, the diamond particles were coated with titanium by microwave heating method, then the Ti-coated diamond particles were used as raw material to fabricate the diamond/Al composites by microwave sintering. The result shows that the diamond particles could be covered with
a uniform and continuous Ti coating under microwave irradiation, and the best Ti coating was obtained at 810 °C for 1 h. The metallic bond between diamond and Ti was formed to generate the intermediate transition layer of TiC. The diamond/Al composites which used Ti-coated diamond particles
as raw material and were fabricated by microwave sintering show high relative density and hardness. The relative density and hardness of the diamond/Al composites increased with the temperature. While the composites were sintered at 710 °C for 1 h, the density could reach 2.855 g·cm−3,
and relative density was 92.09%, which shows better microstructures and properties. There is Al3Ti alloy phase in Ti-coated diamond/Al composites, so the Ti-coated diamond can be well combined with the Al matrix, which can further improve the properties of the composites.
研究领域:
材料科学
·
复合材料制备
✓ 已验证
产品关联
DOI
JOURNAL OF THERMAL SPRAY TECHNOLOGY
·
2021
·Vol. 30
·期 4
·918-925
·
IF 2.757
Liu Jin,Liu Yi,Suo Xinkun,Latka Leszek,Małachowski Aleksandra,Lu Deping,Li Hua
Nano-titania (TiO 2 ) has drawn considerable attention for decades for its excellent photocatalytic activity. The use of photocatalyst TiO 2 in the form of surface coating is usually desired for long-term recyclable photocatalytic performances. Yet deposition of the coatings with appropriate nanostructures persists challenging. Thermal spray processing usually triggered loss of photocatalytic anatase in the coatings. To retain anatase structure from starting TiO 2 powder, in this study, cold spray was employed to deposit TiO 2 nanostructured coatings using TiO 2 nanoparticles as the starting feedstock. The mechanically blended Al-7.5 wt.% TiO 2 powder was used as the feedstock for the coating fabrication, and Al was used as the binder for the nano-TiO 2 particles. The coatings containing anatase phase were successfully fabricated and showed good long-term recyclable performance and service life. After methylene blue degradation testing for three times, the photocatalytic efficiency of the coatings still remained over 90% of the initial photocatalytic efficiency. After high-pressure gas purge and flame sweep processing, the coatings retained the initial nanostructures at their surfaces. The cold spray technical route might open a new window for making the coatings of temperature-sensitive nanosized particles for functional applications.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2015
·
IF 2.711
Jinjin Gao,Chengjian Zhao,Jingfang Zhou,Chunxia Li,Yiran Shao,Chao Shi,Yingchun Zhu
Rutile titania (TiO 2 ) coatings have superior mechanical properties and excellent stability that make them preferential candidates for various applications. In order to prevent infection arising from bacteria, significant efforts have been focused on antibacterial TiO 2 coatings. In the study, titania-nanosilver (TiO 2 /Ag) coatings with five different kinds of weight percentages of silver nanoparticles (AgNPs) were prepared by plasma spray. The feedstock powders, which had a composition of rutile TiO 2 powders containing 1–10,000 ppm AgNPs, were double sintered and deposited on stainless steel substrates with optimized spraying parameters. X-Ray diffraction and scanning electron microscopy were used to analysize the phase composition and surface morphology of TiO 2 /Ag powders and coatings. Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) were employed to examine the antibacterial activity of the as-prepared coatings by bacterial counting method. The results showed that silver existed homogeneously in the TiO 2 /Ag coatings and no crystalline changed happened in the TiO 2 structure. The reduction ratios on the TiO 2 /Ag coatings with 10 ppm AgNPs were as high as 94.8% and 95.6% for E. coli and S. aureus , respectively, and the TiO 2 /Ag coatings with 100–1000 ppm AgNPs exhibited 100% bactericidal activity against E. coli and S. aureus , which indicated the TiO 2 /Ag coatings with more than 10 ppm AgNPs had strong antibacterial activity. Moreover, the main factors influencing the antibacterial properties of TiO 2 /Ag coatings were discussed with grain size and the content of silver as well as the microstructure of the coatings.
研究领域:
材料科学
·
微生物学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Fengxiang Chen,Huiyu Yang,Xin Liu,Dongzhi Chen,Xingfang Xiao,Keshuai Liu,Jing Li,Fan Cheng,Binhai Dong,Yingshan Zhou,Zhiguang Guo,Yong Qin,Shimin Wang,Weilin Xu
To obtain a hydrophobic surface, TiO2 coatings are deposited on the surface of silk fabric using atomic layer deposition (ALD) to realize a hierarchical roughness structure. The surface morphology and topography, structure, and wettability properties of bare silk fabric and TiO2-coated silk fabrics thus prepared are evaluated using scanning electron microscopy (SEM), field-emission scanning electron microscopy (FESEM), scanning probe microscope (SPM), X-ray diffraction (XRD), static water contact angles (WCAs), and roll-off angles, respectively. The surfaces of the silk fabrics with the TiO2 coatings exhibit higher surface roughnesses compared with those of the bare silk fabric. Importantly, the hydrophobic and laundering durability properties of the TiO2-coated silk fabrics are largely improved by increasing the thickness of the ALD TiO2 coating. Meanwhile, the ALD process has a litter effect on the service performance of silk fabric. Overall, TiO2 coating using an ALD process is recognized as a promising approach to produce hydrophobic surfaces for elastic materials.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Bioengineering and Biotechnology
·
2025
·
IF 4.8
Xutao Wen,Qin Zhou,Sihan Lin,Huaming Mai,Ling Zhang
Introduction Head and neck squamous cell carcinoma (HNSCC) frequently invades the jaw, and surgical treatment often leads to bone defects requiring reconstruction with titanium plates. To enhance the anti-tumor and bone regeneration properties of titanium, a selenium-modified hydroxyapatite coating was developed on titanium surfaces. Methods Selenium-modified hydroxyapatite coatings was fabricated using micro-arc oxidation (MAO). The coating properties were characterized by SEM, XPS, AFM, Contacting angle test and ICP-OES. Cell proliferation assays were performed using rBMSCs and Cal27 cells. The osteogenic potential of the materials was assessed via ALP and OCN immunofluorescence staining and quantitative polymerase chain reaction (qPCR). Apoptosis in Cal27 cells was analyzed through flow cytometry, and ROS levels in rBMSCs and Cal27 cells were measured using ROS fluorescent probes. Results A coating was successfully formed on the surface of titanium with a porous structure via MAO. The atomic percentages of calcium, phosphorus and selenium on the coating surface were 42.47%, 45.43% and 12.3%, respectively, and the ion components could be released steadily and slowly. In vitro , 0.2 µg/mL selenium had toxic effects on Cal27 and promoted osteogenic differentiation of rBMSCs. PCR showed that selenium increased the expression of genes related to osteogenic differentiation of rBMSCs by 3–5 times. ROS detection found differences in intracellular ROS content between Cal27 and rBMSCs. Discussion By incorporating selenium-modified coatings, titanium implant materials can simultaneously promote osteogenesis and inhibit tumor growth, offering a promising strategy for postoperative functional recovery in HNSCC patients.
研究领域:
生物材料学
·
肿瘤学
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Science Bulletin
·
2016
·
IF 0
Hui-Zhen Cui,Ying-Qiu Gu,Xin-Xin He,Shuai Wei,Zhao Jin,Chun-Jiang Jia,Qi-Sheng Song
Iron-based composite nanostructures with ceria or titania as shell coating on naked iron spheres were successfully synthesized and used to catalyze ammonia decomposition . The structure and texture of fresh and used catalysts were characterized by transmission electron microscopy , X-ray diffraction, in situ X-ray diffraction, temperature-programmed reduction by hydrogen, and N 2 adsorption–desorption. For ammonia decomposition , the iron-based composite catalyst coated with cerium and titanium showed excellent catalytic activity compared with naked iron sphere catalyst, with the former yielding nearly 100% ammonia conversions at 650 °C and showing high stability in the catalysis test (for 60 h) at 600 °C with a space velocity of 24 , 000 cm 3 g cat − 1 h − 1 . These results showed that adding cerium and titanium played a key role in improving catalytic activity for ammonia decomposition and enabling high thermal stability .
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
APPLIED SURFACE SCIENCE
·
2012
·
IF 2.103
Jianhui Yuan,Qing Zhan,Qiang Lei,Siyue Ding,Hua Li
Nanostructured titania coatings have been a research focus for many years owing to their excellent photocatalytic activity. The major persistent challenge yet is development of competitive deposition techniques for fabricating the nanostructured coatings. Here we report a novel deposition approach by flame spraying the mixtures of nano titania-contained suspension and micron-sized titania powders feedstock. Promising hybrid micro/nano-structured TiO 2 coatings comprising micron-sized splats (50–80 μm) and nano particles (10–40 nm) were successfully produced. Anatase-rutile ratio and proportion of the nanostructures in the coatings can be tailored in a wide range depending on the concentration of nano TiO 2 particles (10–30 nm in size) in the starting suspension. Up to 30 wt.% of anatase in the coatings was achieved. The hybrid micro-/nano-structured TiO 2 coatings exhibit super-hydrophilic performances (∼0° contact angle). Effect of the suspension concentration (concentration of the nano titania particles in the suspension) on the microstructure and mechanical properties of the coatings was also investigated. Compared to the coating deposited using the suspension alone, the hybrid micro/nano-structured TiO 2 coatings exhibited markedly enhanced adhesive strength (by up to 1.8 times) and microhardness (by 9 times). The behavior between the TiO 2 particles with micro- and nano-sizes was also elucidated.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
TEXTILE RESEARCH JOURNAL
·
2018
·
IF 1.54
Huiyu Yang,Yaling Wang,Keshuai Liu,Xin Liu,Fengxiang Chen,Weilin Xu
To develop ultraviolet (UV) light-protective silk fabrics (SFs), a conformal nanoscale TiO2 coating was deposited using an atomic layer deposition (ALD) method, and polyvinylsilsesquioxanes (PVSs) were further coated onto the SFs to enhance their hydrophobicity and UV light-resistance. Scanning electron microscopy and atomic force microscopy revealed hierarchical microstructures and nanostructures of the TiO2 coatings, which were primarily responsible for the increase of the water contact angle from approximately 0 to 120° after the ALD process. A high mean square surface roughness of 76.325 nm also accounted for this improved water contact angle. Furthermore, TiO2-coated SFs modified with low surface energy PVSs exhibited enhanced hydrophobic properties. More importantly, both the UV-blocking and yellowing-resistance of the SFs were improved without any significant change to the luster of the SFs. The ease and simplicity of this fabrication method makes it applicable to the preparation of multifunctional textiles with both good water repellency and UV-resistance.
研究领域:
材料科学
·
纺织工程
·
表面化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）