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electrophoretic Deposition of Titanium Oxide Nanoparticle Films for Dye-Sensitized Solar Cell Applications

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Materials Sciences and Applications 2011年第10期2卷 1427-1431页

作者： Jason Bandy Qifeng Zhang Guozhong Cao 不详

Films of titanium oxide nanocrystalline particles (P25) were deposited using an electrophoretic deposition. The film’s characteristics were tuned for applications in dye-sensitized solar cells. electrophoretic deposition allows control of film characteristics such as porosity and thickness by changing deposition parameters, such as the electric field and deposition time. To increase the efficiency of the dye-sensitized solar cells with films created using electrophoretic deposition, the problem of an electrolyte contamination in the film, which occurred during deposition, was addressed. With the proper chemical post treatment, efficiency of 2.93% with fill factor of 0.55 was obtained when the films were annealed at 450℃. A low annealing temperature of 150℃ resulted in efficiencys of 1.99% with fill factor of 0.68. When the P25 was replaced by hydrothermally fabricated titanium oxide nanocrystalline particles, efficiency of 4.91% with fill factor of 0.55 was obtained.

关键词： Dye-Sensitized Solar Cells electrophoretic Deposition TiO2 Nanoparticles

Effect of Hydroxide Ion Concentration on the Morphology of the Hydroxyapatite Nanorods Synthesized Using electrophoretic Deposition

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Materials Sciences and Applications 2011年第2期2卷 105-110页

作者： Khalil Abdelrazek Khalil Abdulhakim A. Almajid Mahmoud S. Soliman 不详

The effect of OH- concentration on the morphology of the hydroxyapatite (HA) nanorod synthesized using electrophoretic deposition (EPD) method has been investigated. The growth of HA nanorods was achieved on polished titanium substrates. The electrolyte used in this study was prepared by dissolving calcium acetate (Ca (CH3COO)2H)2O), and Ammonium dihydrogen phosphate (NH4H2PO4) in distilled water without any surfactant, and was maintained at 80-130°C. Two electrolytes with OH- concentration of 10-4 and 10-10 were prepared. A highly homogeneous HA nanorods deposited on the titanium substrates were obtained after 1 h in the electrolytes with higher OH- concentration of 10-4. On the other hand, a flower-shaped HA nanostructures composed of needle-like HA crystals were obtained in the electrolyte of lower OH- concentration of 10-10. The deposits were identified as HA crystal rods grown along the c axis and perpendicular to the substrate. The HA deposits were characterized by scanning electron microscopy (SEM) while detailed structural characterization was done using a transmission electron microscope (TEM) equipped with selected area electron diffraction (SAED) patterns.

关键词： Hydroxyapatite Nanorods Flower-Shaped electrophoretic Deposition Synthesi

Study of preparation of BG/HA gradient coating on titanium alloy by electrophoretic deposition method

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Chinese Journal of Biomedical Engineering(English Edition) 2001年第1期10卷 13-19页

作者： CHEN Xiao-ming, HAN Qing-rong, LI Shi-pu, XU Chuan-bo Biomedical Materials and Engineering Center of Wuhan University of Technology, Wuhan 430070,China Biomedical Materials and Engineering Center of Wuhan University of Technology Wuhan 430070China

In this paper, a gradient bioactive coating made from modified bioglass(BG) and hydroxyapatite(HA) was prepared by electrophoretic deposition method(EPD)on the surface of titanium alloy. Strong bonding between the matrix and BG/HA gradient coating was got by sintering. Crystal composition of the coating was analyzed by XRD. The characteristics of surface and cross section of the coating were observed by SEM. Adhesive strength of the coating was tested by pull method. The optimizing technological parameters were determined.

关键词： BG/HA gradient coating, electrophoretic deposition (EPD), titanium alloy

Inducing Macrophages M2 Polarization by Dexamethasone Laden Mesoporous Silica Nanoparticles from Titanium Implant Surface for Enhanced Osteogenesis

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Acta Metallurgica Sinica(English Letters) 2019年第10期32卷 1253-1260页

作者： Jing Luo Xin Ding Wen Song Jian-Ying Bai Jing Liu Zhe Li Fan-Hui Meng Fang-Hao Chen Yu-Mei Zhang State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of Oral Diseases Department of Prosthodontics School of Stomatology The Fourth Military Medical University Xi'an 710032 China Department of Stomatology General Hospital of Southern Theater Command of the Chinese People's Liberation Army Guangzhou 510010 China Huaian Stomatological Hospital Huaian 223001 China State Key Laboratory of Military Stomatology and National Clinical Research Center for Oral Diseases and Shaanxi Key Laboratory of Oral Diseases Department of Dental Materials School of Stomatology The Fourth Military Medical University Xi'an 710032 China

The study conveys an idea to enhance the osseointegration of titanium implant (Ti) through modulating macrophages M2 polarization. The ?100 nm spherical mesoporous silica nanoparticles (MSN) that compromised of ~4-nm-diameter nano? tunnels were synthesized by the conventional "sol-gel" method, into which the dexamethasone (DEX) was loaded (DEX@ MSN). The DEX@MSN could consistently release DEX and showed favorable cytocompatibility in RAW264.7 cells. The arginase-1 expression, a specific marker for macrophages M2 polarization, was also enhanced by DEX @ MSN treatment. Then, the Ti was pre-treated with anodization under 5 V to generate the titania nanotubes with ?30 nm diameter (NT-30) and the DEX @ MSN was introduced onto NT-30 surface via electrophoretic deposition, with the aid of chitosan. After optimizing the deposition parameters, the supernatants of RAW264.7 from the decorated implant surface could significantly promote the osteogenic differentiation of murine primary bone marrow mesenchymal stem cells. These findings demonstrate that delivery of DEX from implant surface can modulate the macrophages M2 polarization and result in favorable osteogenesis.

关键词： Macrophages polarization Titanium implant Osteogenesis Dexamethasone Mesoporous silica nanoparticles electrophoretic deposition

A THEORETICAL INVESTIGATION OF BUBBLE ELECTROPHORESIS

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中国有色金属学会会刊：英文版 1996年第3期6卷 10-15页

作者： Xu Jirun Kelsall G H (P.O.Box 139, Northeastern University, Shenyang 110006 Imperial College of Science and Technology, London, England) Northeastern University P.O. Box 139 Shenyang 110006 China Imperial College of Science and Technology London United Kingdom

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关键词： bubble fluid recirculation interface potential electrophoretic mobility

Effect of Hydroxyapatite Coating Surface Morphology on Adsorption Behavior of Differently Charged Proteins

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Journal of Bionic Engineering 2020年第2期17卷 345-356页

作者： Zhihuan He Shili Sun Chunlin Deng School of Materials Science and Engineering South China University of TechnologyGuangzhou 510641China National Engineering Research Center for Tissue Restoration and Reconstruction South China University of TechnologyGuangzhou 510006China Tea Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640China Key Laboratory of Biomedical Engineering of Guangdong Province South China University of TechnologyGuangzhou 510006China

The morphology of bone repair materials,such as particle size and roughness of the materials surface,can affect the adsorption of protein *** effects of surface morphology on the absorption of proteins with different charges were *** and nano hydroxyapatite(HA)powders prepared by the chemical precipitation method were coated on the surface of a gold sheet by electrophoretic *** hydroxyapatite coating morphologies were obtained by controlling the powder particle size and the deposition *** coating surface morphology was analyzed by Atomic Force Microscopy(AFM),and the adsorption behavior of differently charged proteins on the surface was dynamically monitored by Quartz Crystal Microbalance with Dissipation(QCM-D).The adsorption dependence of two proteins with different charges upon hydroxyapatite coating surface morphology was *** show that coating surfaces with smaller deposited particle sizes are favorable for the adsorption of negatively-charged bovine albumin,while with larger deposited particles facilitate the adsorption of positively-charged *** may be because that the negatively-charged hydroxyapatite coating exhibits stronger electrostatic effect as the increase in the coating particle size,which facilitates the adsorption of positively-charged proteins and hinders the adsorption of negatively-charged *** coating surface roughness facilitates protein adsorption,though the particle size exhibits a dominant *** results are significant for selective adsorption of proteins on material surfaces.

关键词： HA coating biomedical material electrophoretic deposition surface morphology protein adsorption behavior QCM-D

Approaches to improving critical current density of YBCO superconducting thick films deposited by electrophoresis

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Science China(Physics,Mechanics & Astronomy) 2004年第2期47卷 165-172页

作者： ZHU Yabin1,2, ZHOU Yueliang2, LIU Zhen2, WANG Shufang2, CHEN Zhenghao2, L?Huibin2, YANG Guozhen2, XIAO Ling3, REN Hongtao3, JIAO Yulei3 & ZHENG Minghui3 1. Department of Physics, College of Science, Beijing Jiaotong University, Beijing 100044, China 2. Laboratory of Optical Physics, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China 3. General Research Institute for Nonferrous Metals, Beijing 100088, China Correspondence should be addressed to Zhu Yabin (email: ybzhu@***) Department of Physics College of Science Beijing Jiaotong University Beijing China Laboratory of Optical Physics Institute of Physics and Center for Condensed Matter Physics Chinese Academy of Sciences Beijing China General Research Institute for Nonferrous Metals Beijing China

Fabrication of YBCO superconducting thick films by electrophoresis has been widely reported. However, the value of critical current density (Jc) is far from what the practical application requires. The superconducting thick films are obtained using top-seeded melt growth method with different proportional Y2BaCuO5 (Y211) addition. High-pressure oxygen has been used in the annealing process to improve the uniformity of the oxygen content in the superconducting thick films. When 40mol% Y211 powder is added to the YBa2Cu3O7-d (Y123) powder, Jc for the superconducting thick film by approaches described above reaches 7.008?03 A/cm2 (77 K, 0 T), which is greater than the value ever reported.

关键词： YBCO thick films, electrophoretic deposition, melt-textured.

Preparation and characterization of polymer-clay nanocomposite films

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Science China Chemistry 2009年第12期52卷 2323-2328页

作者： CHEN KeYu WANG ChangAn HUANG Yong LIN Wei State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China School of Materials Science and Engineering Georgia Institute of Technology 771 Ferst Drive NW AtlantaGA 30332USA

Polymer/clay nanocomposite films were prepared by means of electrodeposition of aqueous suspension including cathodic electrophoretic acrylic resin (CEAR) and Na+-montmorillonite (NMMT). Studies of XRD,SEM and TEM indicated well-dispersed NMMT platelets in the films prepared. The ideal dispersity achieved was thought to be the result of aqueous compatibility between CEAR molecules and NMMT platelets and the result of the water-involved process as well. The modulus and strength of the polymer/clay nanocomposite coatings tested by tensile testing and nano-indentation were effectively improved compared to those of the virgin CEAR film. In addition,the adhesion strength,flexibility and water-resistance represented by Chinese national standard (GB) kept the best grades.

关键词： polymer-matrix composites (PMCs) layered structures nanocomposites electrophoretic montmorillonite intercalation

COMPARISON　BETWEEN　THEORETICAL　FORMULA　AND　EXPERIMENTAL　RESULTS　ON　BUBBLE　ELECTROPHORESIS

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中国有色金属学会会刊：英文版 1996年第4期6卷 6-10,129页

作者： Xu, Jirun Kelsall, G.H. Northeast Univ Shenyang China

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关键词： bubble electrophoresis electrophoretic mobility bubble size electrical field