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???????????????????????????????档??????????????????????? http://cnc.126disk.com ???????tmxkll ????shares ????????????飺 1. NANOSTRUCTURED MATERIALS: BASIC CONCEPTS AND MICROSTRUCTURE, H. GLEITER, Acta mater. 48 (2000) 1??29 AbstractÐNanostructured Materials (NsM) are materials with a microstructure the characteristic length scale of which is on the order of a few (typically 1??10) nanometers. NsM may be in or far away from ther-modynamic equilibrium. NsM synthesized by supramolecular chemistry are examples of NsM in thermo-dynamic equilibrium. NsM consisting of nanometer-sized crystallites (e.g. of Au or NaCl) with di?erent crystallographic orientations and/or chemical compositions are far away from thermodynamic equilibrium. The properties of NsM deviate from those of single crystals (or coarse-grained polycrystals) and/or glasses with the same average chemical composition. This deviation results from the reduced size and/or dimensionality of the nanometer-sized crystallites as well as from the numerous interfaces between adjacent crystallites. An attempt is made to summarize the basic physical concepts and the microstructural features of equilibrium and non-equilibrium NsM. 2. Advanced Structural Dynamics and Active Control of Structures, Wodek K. Gawronski, 3. characterization of nanophase materials,WANG Zhonglin 4. Introduction to Nanoscience and Nanotechnology: A Workbook, M. Kuno 5. Chemistry and Properties of Nanocrystals of Different Shapes, Clemens Burda,*,†,‡ Xiaobo Chen,† Radha Narayanan,?? and Mostafa A. El-Sayed*, Chem. Rev. 2005, 105, 1025-1102 6. The Chemistry of Nanostructured Materials, Peidong Yang 7. Dielectric, magnetic and optical properties of nanocomposites, K. Kempa, Int. J. Nanotechnol., Vol. 4, No. 3, 2007, Abstract: Nanocomposites are media made of nanoparticles embedded in a matrix. Depending on the nanoparticle types and shapes, nanocomposites can have different properties. I discuss here dielectric and magnetic composites at low, as well as, high frequencies. At low frequencies, dielectric and magnetic properties can be enhanced by using elongated nanoparticles. At high frequencies various photonic, plasmonic and polaritonic effects can occur in nanocomposites, in particular in those with periodic arrangement of nanoparticles. The negative refraction can be achieved in nanocomposites with simultaneously negative dielectric function and magnetic permeability. 8. NanoScience and Technology, Series Editors: P. Avouris B. Bhushan D. Bimberg K. von Klitzing H. Sakaki R.Wiesendanger 9. Hollow colloidal particles by emulsion templating from synthesis to self-assembly, 10. Monodisperse nanocrystals: general synthesis, assembly, and their applications, Xun Wang and Yadong Li*, Chem. Commun., 2007, 2901?C2910. This article summarizes the recent advances in the synthesis, assembly and applications of monodisperse nanocrystals, which may be suggestive for the designed synthesis and assemblies of target nanocrystals according to practical requirements. 11. Nano-Organometallics: Heterogenizing Homogeneous Catalysts via Thin Film Methodology, Ashok K. Kakkar*, Chem. Rev. 2002, 102, 35793588, Contents I. Introduction 3579 II. Molecular Organization 3579 A. LangmuirBlodgett and Molecular Self-Assembly 3579 B. Surface Structure Characterization 3580 III. Nano-Organometallic LangmuirBlodgett Thin Films 3581 IV. Molecularly Self-Assembled Nano-Organometallic Thin Films 3582 V. Concluding Remarks 3585 VI. Acknowledgments 3586 VII. References 3586 12. A general strategy for nanocrystal synthesis, Xun Wang1,2, Jing Zhuang1,2, Qing Peng1,2 & Yadong Li, NATURE, Vol 437 1, 121-124. New strategies for materials fabrication are of fundamental importance in the advancement of science and technology1?C12. Organometallic13,14 and other organic solution phase15?C17 synthetic routes have enabled the synthesis of functional inorganic quantum dots or nanocrystals. These nanomaterials form the building blocks for new bottom-up approaches to materials assembly for a range of uses; such materials also receive attention because of their intrinsic size-dependent properties and resulting applications18?C21. Here we report a unified approach to the synthesis of a large variety of nanocrystals with different chemistries and properties and with low dispersity; these include noble metal, magnetic/ dielectric, semiconducting, rare-earth fluorescent, biomedical, organic optoelectronic semiconducting and conducting polymer nanoparticles. This strategy is based on a general phase transfer and separation mechanism occurring at the interfaces of the liquid, solid and solution phases present during the synthesis. We believe our methodology provides a simple and convenient route to a variety of building blocks for assembling materials with mnovel structure and function in nanotechnology13?C29. 13. One dimensional self assembly of nanoparticle: preparation, properties, and promise, Zhiyong Tang, Adv Materials, 17(8), 951-962. 14. One-Dimensional Nanostructures-Synthesis,Characterization,and Applications, Younan Xia, Peidong Yang, Adv Materials, 15(5), 353-389. 15. Optical Nanotechnologies-The Manipulation of Surface and Local Plasmons, 16. Size dependence of nanostructures: Impact of bond order deficiency, Chang Q. Sun, Progress in Solid State Chemistry 35 (2007) 1-159, 17. Second Harmonic Spectroscopy of Aqueous Nano- and Microparticle Interfaces, Kenneth B. Eisenthal, Chem. Rev. 2006, 106, 1462-1477 18. Self-assembly of nanoparticles into structured spherical and network aggregates, Andrew K. Boal*, Faysal Ilhan*, Jason E. DeRouchey², Thomas Thurn-Albrecht², Thomas P. Russell² & Vincent M. Rotello*, NATURE |VOL 404 | 13 APRIL 2000 19. Synthesis of Monodisperse Spherical Nanocrystals, Jongnam Park, Jin Joo, Soon Gu Kwon, Youngjin Jang, and Taeghwan Hyeon*. Angew. Chem. Int. Ed. 2007, 46, 4630 ?C 4660 Much progress has been made over the past ten years on the synthesis of monodisperse spherical nanocrystals. Mechanistic studies have shown that monodisperse nanocrystals are produced when the burst of nucleation that enables separation ofthe nucleation and growth processes is combined with the subsequent diffusion-controlled growth process through which the crystal size is determined. Several chemical methods have been used to synthesize uniform nanocrystals of metals, metal oxides, and metal chalcogenides. Monodisperse nanocrystals of CdSe, Co, and other materials have been generated in surfactant solution by nucleation induced at high temperature, and subsequent aging and size selection. Monodisperse nanocrystals ofmany metals and metal oxides, including magnetic ferrites, have been synthesized directly by thermal decomposition ofmetal?Csurf actant complexes prepared from the metal precursors and surfactants. Nonhydrolytic sol?Cgel reactions have been used to synthesize various transitionmetal- oxide nanocrystals. Monodisperse gold nanocrystals have been obtained from polydisperse samples by digestive-ripening processes. Uniform-sized nanocrystals of gold, silver, platinum, and palladium have been synthesized by polyol processes in which metal salts are reduced by alcohols in the presence ofappropriate surfactants. 20. Electro-Oxidation Activity Nanocrystals with High-Index Facets and High, Na Tian, et al. Science 316, 732 (2007); The shapes of noble metal nanocrystals (NCs) are usually defined by polyhedra that are enclosed by {111} and {100} facets, such as cubes, tetrahedra, and octahedra. Platinum NCs of unusual tetrahexahedral (THH) shape were prepared at high yield by an electrochemical treatment of Pt nanospheres supported on glassy carbon by a square-wave potential. The single-crystal THH NC is enclosed by 24 high-index facets such as {730}, {210}, and/or {520} surfaces that have a large density of atomic steps and dangling bonds. These high-energy surfaces are stable thermally (to 800??C) and chemically and exhibit much enhanced (up to 400%) catalytic activity for equivalent Pt surface areas for electro-oxidation of small organic fuels such as formic acid and ethanol. 21. When Small Is Different Some Recent Advances in Concepts and Applications of Nanoscale Phenomena, Gary Hodes, Adv Materials, 19, 639-655. Reduction in size often does more than simply make things smaller. There are many properties of materials that undergo qualitative, often sudden, changes below a certain size scale. This Report first describes some of these size-dependent properties. Following this general description, recent developments in a number of selected topics in nanoscience are covered. These topics are: luminescence from Au nanoparticles; Si (and related) nanoparticle luminescence; modification of optical absorption by surface adsorption on nanoparticles; and transistors (and some other devices) based on nanotubes and nanowires. 22. Mechanical and thermal stability of mechanically induced near-surface nanostructures, I. Nikitin a, I. Altenberger a,∗, H.J. Maier b, B. Scholtes, Materials Science and Engineering A 403 (2005) 318?C327 Abstract Mechanical surface treatments, such as deep rolling, shot peening, hammering, etc., can significantly improve the fatigue behaviour of metallic materials owing to near-surface nanocrystallisation, strain hardening and compressive residual stresses. In this paper, we investigate the stability of near-surface microstructures of deep rolled austenitic stainless steel AISI 304 and turbine blade alloy Ti?C6Al?C4V during high temperature fatigue (up to 600 ◦C) by transmission electron microscopy and X-ray diffraction. The investigated nanocrystalline regions are stable during short time annealing and unstable during long time annealing at 600 ◦C. Isothermal fatigue in the low cycle fatigue regime at high stress amplitudes does not alter the nanocrystalline region up to 600 ◦C. 23. ?????????????, ?????鼮 24. ???????????K. J. ??????±????????? 25. ???????????????鼮 26. ?????????????????????????????? 27. ?????????????????????????? 28. ???????????????X ????С????????????????????????????????????? 29. Nature??????????2500??ε????? 30. Nnao-Top 25 31. ????????????????????? 32. ??????????????С?????? 33. ??????????????????????? 33. ??????鼮??????????????????????????-????????????????????????????? 34. ??壺????????壬???????????????????????????????????????? 35. ???????????????_????_?????? 36. ACS??????Щ?????????? [ Last edited by tmxkl on 2008-4-2 at 11:57 ] |
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