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| 1 | Bio-replicated forming of the biomimetic drag-reducing surfaces in large area based on shark skin显示文摘On the investigation of biomimetic drag-reducing surface, direct replication of the firm scarfskins on low-resistance creatures to form biomimetic drag-reducing surfaces with relatively vivid morphology relative to the living prototype is a new attempt of the bio-replicated forming technology.Taking shark skin as the bio-replication template, the hot embossing method was applied to the microreplication of its outward morphology. Furthermore, the skins were jointed together to form the drag-reducing surface in large area. The results of the resistance measurements in a water tunnel according to the flat-plate sample pieces have shown that the biomimetic shark-skin coating fabricated by the bio-replicated forming method has significant drag reduction effect, and that the drag reduction efficiency reached 8.25% in the test conditions. | HAN Xin ZHANG DeYuan LI Xiang LI YuanYue | 2008 | Chinese Science Bulletin2008，53，10： | 16 |
| 2 | Study on the micro-replication of shark skin显示文摘Direct replication of creatural scarfskins to form biomimetic surfaces with relatively vivid morphology is a new attempt of the bio-replicated forming technology at animal body. Taking shark skins as the replication templates, and the micro-embossing and micro-molding as the material forming methods, the micro-replicating technology of the outward morphology on shark skins was demonstrated. The preliminary analysis on replication precision indicates that the bio-replicated forming technology can replicate the outward morphology of the shark scales with good precision, which validates the application of the bio-replicated forming technology in the direct morphology replication of the firm creatural scarfskins. | HAN Xin ZHANG DeYuan | 2008 | Science China(Technological Sciences)2008，51，7： | 12 |
| 3 | Magnetization of microorganism cells by sol-gel method显示文摘Microorganism cells could be used as templates during fabrication of magnetic or conductive microstructures in different standard shapes. In this paper, feasibility of magnetizing microorganism cells by sol-gel method, which is to coat cells of Spirulina (a type of natural micro-helical microorganism) with the ferrite (a kind of magnetic material), was discussed and investigated. Then the cell form, components and the phase structure were observed and analyzed using various tools including optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray detector (EDX), transmission electron microscopy (TEM), and X-ray diffraction analysis (XRD). Results showed that spirulina cells could be coated with ferrite after the sol-gel process, with the shape of natural helixes well kept, that the components of different sampling points on the surface layer were consistent and the thickness of layer was uniform, and that the type of the surface ferrite layer formed was cubic Fe3O4. It was also observed that there were nano-particles yielded in the cells and certain deposit on the walls between cells. The kinetics of the cell magnetization technology by sol-gel was also discussed. | CHEN Bo ZHAN TianZhuo LIAN ZhiYang ZHANG DeYuan | 2008 | Science China(Technological Sciences)2008，51，5： | 11 |
| 4 | Magnetization of microorganism cells by thermal decomposition method显示文摘The bio-limited forming technology, a new technology organically integrating microbiology, manufacturing science and materials science, is used in the manufacturing of magnetic or conductive microstructures of different standard shapes. This paper explores the feasibility of magnetizing microorganism with thermal decomposition method. The principle of thermal decomposition of iron pentacarbonyl has been adopted to investigate the cells of Spirulina (a type of nature micro-helical microorganism) coated with pure iron. Further analysis have been conducted on the observations results of hollow micro-helical magnetic particles form, components and the phase structure obtained by using various tools including optical microscopy, scanning electron microscopy (SEM), energy dispersive X-ray detector (EDX), transmission electron microscopy (TEM), and X-ray diffraction analysis (XRD). Results showed that Spirulina cells could be coated with iron particles after the completion of thermal decomposition process, with well-kept shape of natural helixes and consistent components of different sampling points on the surface layer and thickness of layer. After the heat treatment at 700°C, the type of the surface iron layer formed was α-Fe. The paper also investigates the kinetics of the cell magnetization technology by thermal decomposition. | ZHANG DeYuan ZHANG WenQiang CAI Jun | 2011 | Science China(Technological Sciences)2011，54，5： | 5 |
| 5 | 微生物细胞溶胶-凝胶法磁性化研究显示文摘以微生物细胞为模板可制备具有多样形状的磁性或导电微颗粒.本文探讨微生物细胞溶胶-凝胶法磁性化的可行性,以尺寸在微米级的具有天然螺旋形体的微生物材料螺旋藻的细胞为模板进行细胞溶胶-凝胶法包覆磁性材料铁氧体的工艺研究,并通过光学显微镜、扫描电镜、电子能谱、透射电镜、X射线衍射对其细胞形态、表层成分、相结构进行观察与分析.结果表明,螺旋藻细胞经溶胶-凝胶处理后表面能包覆上铁氧体材料;其天然螺旋形体可保持良好,得到的单体表面磁性层厚度、成分基本均匀,在文中试验条件下,细胞表层铁氧体为立方尖晶石结构的Fe3O4;还可观察到细胞内部有纳米颗粒产生,同时细胞间横壁也有沉积.还探讨了微生物细胞溶胶-凝胶法磁性化工艺过程的物理化学反应机理。 | 陈博 詹天卓 连志阳 张德远 | 2008 | 中国科学(E辑)2008，38，7： | 3 |
| 6 | Research on magnetic metallization of microorganism cells using electroplating technique显示文摘Spirulina platensis were chosen as templates to produce microscopic helical soft-core magnetic particles by way of depositing ferromagnetic alloy onto their surface using electroplating technique,and the process of electroplating ferromagnetic alloy onto microorganism cells was studied.The morphology and appearance of the coated Spirulina platensis were analyzed with optical microscopy and scanning electron microscopy,respectively,and the ingredients and phase structure of the alloy coating were analyzed with energy dispersive X-ray detector(EDX) and X-ray diffractive analysis(XRD),respectively.The result showed that the particles were successfully coated with uniform metal coating and their initial helical shape was perfectly replicated.The coating was NiFe alloy,and its phase structure was face-centered cubic structure.The magnetic properties of the coated particles were tested with vibrating sample magnetometer(VSM),and the result showed that the particles were ferro-magnetic,which means the magnetic electroplating of the microorganism cells was successfully achieved.The electrochemical reaction mechanism of the magnetic plating process was also analyzed;the result showed that the deposition of NiFe on the microorganism cells was anomalous codeposition,and that Fe2+ ion was preferential deposited when magnetic stirring was applied. | CAI Jun ZHANG DeYuan LAN MingMing LIAN ZhiYang | 2011 | Science China(Technological Sciences)2011，54，6： | 3 |
| 7 | 金属化微生物细胞镀层导电性研究显示文摘从5种不导电的材料中筛选出化学镀效果最佳的材料作为基体,通过SEM,EDX对比该基体与细胞的表面镀层,最终通过测量所选基体表面镀层的电阻率间接研究7种用于微生物细胞金属化的镀层的导电性。结果表明:所选基体和细胞的表面镀层组成和成分基本一致;7种镀层中含Cu量达100%的镀层导电能力最强,含Ni 76.08%,Fe 15.53%,P 8.38%(原子分数)的NiFeP镀层导电能力最差,4种含Cu的镀层中,随含Cu量增加导电能力增强,但并非线性相关。 | 陈博 蔡军 张德远 | 2005 | 材料工程2005，33，12： | 1 |
| 8 | Preparation of New Type Ni-P Micro/Nano Metal Material Based on Bacteria Shape显示文摘A new type of Ni-P alloy with rod-shape was prepared by electroless deposition method based on the shape of Nocadia, a kind of bacteria. The material was characterized by microbiological method, scanning elec-tron microscope, energy dispersion spectroscopy, transmission electron microscopy, fourier transform infrared spectroscopy, X-ray diffraction and vibrant sample magnetometer. It was found that Ni-P alloy deposited on Nocadia surface was amorphous when pH=8.0. The amount of Ni crystalline increased with pH of plating solution. Ni-P nano-particles deposited on active locations on the surface at the initial stage, and then ho-mogeneous Ni-P film formed with time. Nocadia remained their original rod shape after Ni-P nano-particles deposition. The new type metal material formed of Ni-P alloy with nano-particles was prepared. The mag-netization of the material prepared at pH=9.7 is greater than that prepared at pH=8.0. The magnetic loss of the material prepared at pH=9.7 is less than 0.1. The dielectric loss exceeds 0.3 when frequency is higher than 14 GHz, which is 1.5 at 18 GHz. The new type Ni-P metal material with Nocadia shape has dielectric loss property. | Xin Liang Jianhua Liut Songmei Li | 2009 | Journal of Materials Science & Technology2009，25，1： | 1 |
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