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最新的Advanced Materials和Small上关于纳米管的综述
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1. Boron Nitride Nanotubes By Dmitri Golberg,* Yoshio Bando,* Chengchun Tang, and Chunyi Zhi Adv. Mater. 2007, 19, 2413–2432 The current status of research on boron nitride nanotubes (BNNTs)—carbonnanotube structural analogues—is discussed. Latest achievements inBNNT synthesis, morphology, and atomic structure analysis as well asphysical, chemical, and functional property evaluations are reviewed.Similarities and differences between structural parameters and properties of BNNTs in comparison with conventional carbon nanotubes are particularly highlighted. Recent breakthroughs in BNNT filling, doping and functionalization, morphology, and electronic structure engineering are examined. Finally, prospective BNNT applications for fabricating field-effect transistors, gas accumulators, and reinforcing polymer films are presented. 2. Formation of Nanotubes and Hollow Nanoparticles Based on Kirkendall and Diffusion Processes: A Review Hong Jin Fan,* Ulrich Gçsele, and Margit Zacharias small 2007, 3, No. 10, 1660 – 1671 The Kirkendall effect is a consequence of the different diffusivities of atoms in a diffusion couple causing a supersaturation of lattice vacancies.This supersaturation may lead to a condensation of extra vacancies in the form of so-called “Kirkendall voids” close to the interface.On the macroscopic and micrometer scale these Kirkendall voids are generally considered as a nuisance because they deteriorate the properties of the interface.In contrast, in the nanoworld the Kirkendall effect has been positively used as a new fabrication route to designed hollow nano-objects.In this Review we summarize and discuss the demonstrated examples of hollow nanoparticles and nanotubes induced by the Kirkendall effect.Merits of this route are compared with other general methods for nanotube fabrication.Theories of the kinetics and thermodynamics are also reviewed and evaluated in terms of their relevance to experiments.Moreove r, nanotube fabrication by solid-state reactions and non-Kirkendall type diffusion processes are covered. http://www.box.net/shared/56jt9sgd83 |
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