Nano materials

Xem 1-20 trên 66 kết quả Nano materials
  • In this paper, we report the ammonia (NH3) sensing behavior of rGO based sensors functionalized with nano-structured metal: silver (Ag) or platinum (Pt) or gold (Au) in air at room temperature and atmospheric pressure. The gas response is detected by the monitoring changes in electrical resistance of the rGO/metal hybrids due to NH3 gas adsorption. Compared to bare rGO, significantly improved NH3 sensitivity is observed with the addition of nanostructured metals.

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  • Tìm hiểu về vật liệu nano I. Vật liệu nano là gì? Vật liệu nano (nano materials) là một trong những lĩnh vực nghiên cứu đỉnh cao sôi động nhất trong thời gian gần đây. Điều đó được thể hiện bằng số các công trình khoa học, số các bằng phát minh sáng chế , số các công ty có liên quan đến khoa học, công nghệ nano gia tăng theo cấp số mũ. Con số ước tính về số tiền đầu tư vào lĩnh vực này lên đến 8,6 tỷ đô la vào năm 2004 . Vậy thì tại sao vật...

    pdf4p hanguyenthuyquynh 15-02-2011 703 258   Download

  • Giới thiệu vật liệu cấu trúc nano Giới thiệu Vật liệu nano ( nano materials ) = một trong những lĩnh vực nghiên cứu đỉnh cao sôi động nhất trong thời gian gần đây. Công nghệ nano: trở thành một vấn đề hết sức thời sự và được sự quan tâm nhiều hơn của các nhà khoa học. Các nước trên thế giới hiện nay đang bước vào một cuộc chạy đua mới về phát triển và ứng dụng công nghệ nano. ...

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  • Society is approaching and advancing nano- and microtechnology from various angles of science and engineering. The need for further fundamental, applied, and experimental research is matched by the demand for quality references that capture the multidisciplinary and multifaceted nature of the science.

    pdf241p nhatro75 16-07-2012 80 37   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: High-precision, large-domain three-dimensional manipulation of nano-materials for fabrication nanodevices

    pdf11p sting04 07-02-2012 21 3   Download

  • Phần 2 cuốn sách "Polyme chức năng và vật liệu lai cấu trúc nano" tiếp tục giới thiệu đến bạn đọc nội dung tương ứng với phần II và phần III trong cuốn sách. Nội dung phần II gồm 5 chương, về các vấn đề như: Vật liệu lai hỗn tính cấu trúc nano, vật liệu lai gốm và kim loại khối, nano bạc và vật liệu lai, titan ioxit cấu trúc nano và vật liệu lai.

    pdf300p talata_8 27-01-2015 125 81   Download

  • Within the past decade, the emphasis of scientific research worldwide has shifted to the study of the behavior of materials at the atomic scale of matter.

    doc16p vaquhu 07-03-2010 124 78   Download

  • Synthesis has a central role in the development of Science especially in Chemistry. The strategies adopted in synthesis of molecules and materials have undergone considerable changes in recent times and it was felt that it may be necessary to assess and assimilate information on this topic in a single place. Though, no originality is claimed to the contents on this topic, the very fact that the available information on this topic is available in one place itself is considered to be a major step forward.

    pdf361p dontetvui 21-01-2013 46 24   Download

  • As we all know, ceramic materials are inorganic, non-metallic, solid, and inert materials. Things are made from them by the action of heat and subsequent cooling, which may be crystalline or partly crystalline. The definition of ceramic is often restricted to inorganic crystalline materials, as opposed to the noncrystalline glasses, which involve several steps of the ceramic process, and their mechanical properties behave similarly to ceramic materials.

    pdf240p greengrass304 18-09-2012 45 19   Download

  • Marti, O. Ò"AFM Instrumentation and Tips"Ó Handbook of Micro/Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, 1999 © 1999 by CRC Press LLC AFM Instrumentation and Tips Othmar Marti 2.1 2.2 Force Detection The Mechanics of Cantilevers Compliance and Resonances of Lumped Mass Systems • Cantilevers • Tips and Cantilevers • Materials and Geometry • Outline of Fabrication 2 2.3 2.4 2.5 2.6 2.7 2.

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  • Harrison, J.A. et al. “Atomic-Scale Simulation of Tribological and Related...” Handbook of Micro/Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, 1999 Atomic-Scale Simulation of Tribological and Related Phenomena Judith A. Harrison, Steven J. Stuart, and Donald W. Brenner 11.1 Introduction 11.2 Molecular Dynamics Simulations Interatomic Potentials • Thermodynamic Ensemble • Temperature Regulation 11 11.

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  • Ericson, E.; et. al “Mechanical Properties of Materials in Microstructure...” Handbook of Micro/Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, 1999 © 1999 by CRC Press LLC Mechanical Properties of Materials in Microstructure Technology Fredric Ericson and Jan-Åke Schweitz 15.1 Introduction 15.2 Cohesion and Crystal Structures System Energy and Interatomic Binding • Lattice Structures and Structural Defects 15 15.3 Elasticity Properties Isotropic Elasticity • Anisotropic Elasticity 15.

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  • Bhushan, B. “Micro/Nanotribology and Micro/Nanomechanics of Magnetic...” Handbook of Micro/Nanotribology. Ed. Bharat Bhushan Boca Raton: CRC Press LLC, 1999 © 1999 by CRC Press LLC Micro/Nanotribology and Micro/Nanomechanics of Magnetic Storage Devices Bharat Bhushan 14.1 Introduction 14.2 Experimental Experimental Apparatus and Measurement Techniques • Test Specimens 14 14.3 Surface Roughness 14.4 Friction and Adhesion Nanoscale Friction • Microscale Friction and Adhesion 14.5 Scratching and Wear Nanoscale Wear • Microscale Scratching • Microscale Wear 14.

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  • Nano-dimensional MnO2 were prepared in ethanol – water media from their inorganic salts by parallel redox reactions. The pH of solution, concentration of the salts and ethanol as well as reaction temperature were the key parameters for forming of nano-particles and anticoagulation. The MnO2 particles in colloidal solution then were coated on calcinated laterite grains to create new adsorption materials.

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  • Mechanical properties are of critical importance to any material that is used for transmission of forces or moments, or just for sustaining loads. The gradual introduction of microcomponents in practical © 1999 by CRC Press LLC applications within microstructure technology (MST) has instigated an increasing demand for insight into the fundamental factors that determine the mechanical integrity of such elements, for instance, their long-term reliability or how to choose proper safety limits in design and use....

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  • HPDE-clay composites materials prepared by melting compounding have discrete change in mechanical physical properties in comparison to the initial HPDE even when a small amount of clays is introduced. It is presented the results of the studying of the structure, the properties and morphology of HPDE- clay composites. The E modulus is increased from 702 MPa in the initial to 993.34 MPa, the tensile strength is raised from 12.37 to 35.33 MPa (most 3 times) and solvent permeability is decreased with 1% clay.

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  • Today, nano composite material is being studied and widely used for defence security and economic development. Keeping researching on the mechanic of three-phases nano composite in which two-phases is grains of pad and the structure of one-phase in reinforced two-phases is a nano structure, basing on consideration for interaction of the polyme matrix and grains of padding, we have defined engineering constants of the three-phases polyme composite nano material.

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  • Mechanochemical method was used to synthesize nano Al2O3 dispersion - strengthened Cu matrix composite materials. Nanocomposite powders of Cu - Al2O3 were produced by milling at room temperature in attritor mill using mixtures of CuO, Al and Cu powder ingredients.

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  • The study results showed that the effect of pressed - sintered parameters on microstructure and properties of composite Cu - nano Al2O3 dispersed such as microstructure and density, hardness. Also, the results demonstrated that nano Al2O3 can be able to synthesize by a mechanochemical process in attritor balls milling. Keywords: mechanochemical, Cu-Al2O3, dispersion, X-ray diffraction, SEM, microstructure.

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  • Nanocrystals have been attracting much attention for future science and technology. Chapters are sought that address innovative solutions to the design, synthesis, crystallization, morphology control, self-assembly, nano/micro-structure formation, patterning, novel property and device application of Nanocrystals. The book involves Nanocrystals of metal oxides, semiconductors, compounds, noble metals, metals, inorganic materials, carbon materials, organic molecules, polymers, bio materials, hybrid materials, composites, etc....

    pdf272p samsungwifi 10-04-2012 132 27   Download


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