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【材料版系列跨年活动】分享08年行业内的牛文献，3-5金币奖励
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分享08年行业内的牛文献 格式大致为： 【题目】 【作者】 【摘要】 【刊名及期卷】 【下载链接】 每个分享的链接给予3-5金币的奖励， 每篇牛文献的介绍分占不同楼层， 奖励可累加，欢迎提供更多资料。 [ Last edited by hslining on 2009-1-3 at 10:16 ] |
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★ ★ ★
hslining(金币+3,VIP+0):支持!
hslining(金币+3,VIP+0):支持!
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【题目】A Quantitative Single-Molecule Study of Thioether Molecular Rotors 【作者】Ashleigh E. Baber, Heather L. Tierney, and E. Charles H. Sykes 【摘要】This paper describes a fundamental, single-molecule study of the motion of a set of thioethers supported on Au surfaces. Thioethers constitute a simple, robust system with which molecular rotation can be actuated both thermally and mechanically. Low-temperature scanning tunneling microscopy allowed the measurement of the rotation of individual molecules as a function of temperature and the quantification of both the energetic barrier and pre-exponential factor of the motion. The results suggest that movement of the second CH2 group from the S atom over the surface is responsible for the barrier. Through a series of single-molecule manipulation experiments, we have switched the rotation on and off reversibly by moving the molecules toward or away from one another. Arrhenius plots for individual dibutyl sulfide molecules reveal that the torsional barrier to rotation is1.2 kJ/mol, in good agreement with the temperature at which the molecule’s appearance changes from a linear to a hexagonal shape in the STM images. The thioether backbone constitutes an excellent test bed for studying the details of molecular rotation at the single-molecule level. 【刊名及期卷】ACS Nano, 2008, 2 (11), 2385-2391 【下载链接】http://www.namipan.com/d/32dd948 ... 29d227f2543431a0700 |
5楼2009-01-05 09:11:01
★ ★ ★
纳米镍粉(金币+3,VIP+0):有下载的链接吗?先谢谢了
纳米镍粉(金币+3,VIP+0):有下载的链接吗?先谢谢了
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【题目】Matching Glass-Forming Ability with the Density of the Amorphous Phase 【作者】Y. Li,1,2* Q. Guo,1,2 J. A. Kalb,1,3 C. V. Thompson1,3* 【刊名及期卷】Science 19 December 2008: Vol. 322. no. 5909, pp. 1816 - 1819 【摘要】 The density of the amorphous phase of metals is generally thought to be related to glass formation, but this correlation has not been demonstrated experimentally to date. In this work, systematic deflection measurements using microcantilevers and a combinatorial deposition method show a correlation between glass-forming ability and the density change upon crystallization over a broad compositional range in the copper-zirconium binary system. Distinct peaks in the density of the amorphous phase were found to correlate with specific maxima in the critical thickness for glass formation. Our findings provide quantitative data for the development of structural models of liquids that are readily quenched to the amorphous state. The experimental method developed in this work can facilitate the search for new glass-forming alloys. |
2楼2009-01-02 20:37:20
3楼2009-01-03 10:04:33
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hslining(金币+3,VIP+0):原创，鼓励！
hslining(金币+3,VIP+0):原创，鼓励！
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【题目】Crystal chemistry and Calphad modeling of the r phase 【作者】J.-M. Joubert 【摘要】A systematic review of the crystal chemical properties of the r phase is presented, with special emphasis on the atomic order, i.e. the distribution of the atoms on the different sites of the crystal structure. The data available in the literature have been systematically assessed, and are complemented by an experimental investigation in the following systems: Al–Nb, Al–Ta, Cr–Mn, Cr–Os, Cr–Re, Cr–Ru, Co–Mo, Fe–Mo, Fe–Re, Mn–Mo, Mn–Re, Mn–V, Mo–Re, Nb–Pt, Nb–Re, Ni– V, Pd–Ta, Re–V, Rh–Ta and Ru–W. The properties are analyzed as a function of composition and the nature and atomic size of the elements involved. The possibility of an order–disorder transition has also been reviewed and completed by diffraction experiments in two systems (Cr–Mn and Ni–V). First-principles calculations on the r phase are reviewed in line with the Calphad approach. An analysis of the literature data concerning the Calphad modeling of systems involving the r phase has been made. The different models used are presented and discussed. The conclusions of crystal structure data analysis are used to make some recommendations about the choice of a model in the frame of a Calphad assessment. 【刊名及期卷】Progress in Materials Science 53 (2008) 528–583 【下载链接】http://www.namipan.com/d/Hartsch ... 8500605f3a5e1716a00 |
4楼2009-01-04 11:03:12
