x********8 发帖数: 167 | 1 板栗外面一层皮衣带刺是我来到筑波才知道的事,这个完全可以写一篇文章批判一下吃
板栗觉得香的人居然不知道采板栗是多么一件不容易的事情。我不是纨绔子弟,出了这
样的事情完全要怪自然课本上没有提到这个事实,所以现在知道了可以释然,然后以后
可以教训别人:你就知道板栗好吃。。。
带刺是自然选择的结果,果皮内的板栗可以幸免于乌鸦的骚扰,从而生根发芽。但是根
据我的观察,大多数板栗的底部都会有一个虫洞,所以很多掉在草丛中的成熟果实都已
经没有发芽可能。现在正是板栗毛球炸开时刻,所以周末可以去所里几棵板栗树下溜达
一下。
转到正题,纳米板栗现在也上市了,请看最新ACS Nano上一篇文章,摘要如下。
nanowires同志在博客上通知了这篇文章,有人评论说好像没有什么很让人惊讶的结果
,我也赶快去看看。读过之后有三点收获:
1,作者们推翻了早先一个理论工作预言,即锐钛矿相(anatase)的氧化钛不可能长成
大晶粒,金红石相(rutile)一般才是热力学稳定态。当前工作结果发现控制成核生长
速度石可以得到较大单晶的锐钛矿相氧化钛。读者注意了,rutile这个单词虽然发音像
锐钛矿,但是确实金红石相的 |
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g***2 发帖数: 403 | 2 http://www.sciencemag.org/cgi/content/abstract/328/5980/882
Hydrogen Bonding Controls the Dynamics of Catechol Adsorbed on a TiO2(110)
Surface
Shao-Chun Li,1,* Li-Na Chu,2 Xue-Qing Gong,2 Ulrike Diebold1,3,*
Direct studies of how organic molecules diffuse on metal oxide surfaces can
provide insights into catalysis and molecular assembly processes. We studied
individual catechol molecules, C6H4(OH)2, on a rutile TiO2(110) surface
with scanning tunneling microscopy. Surface hydroxyls enhanced the |
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s********n 发帖数: 235 | 3 Title: Solid solutions with rutile structure: Electronic behaviour and
ultraviolet photoelectron spectrometry study
Author(s): Belloch JM, Isasi J, Lopez ML, et al.
Source: JOURNAL OF MATERIALS SCIENCE Volume: 31 Issue: 24 Pages: 6609-
6614 Published: DEC 15 1996
Many thanks!
x********[email protected] |
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j*******j 发帖数: 65 | 4 rutile 钛白粉在近红外波段的吸收情况是怎么样 的?查了半天文献还是 没查着。有
比较了解这方面
的同学吗? 谢谢指教 |
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s********n 发帖数: 235 | 5 应该没有,有也是很少的,rutile带宽3.2eV,处于紫外了。 |
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s*********a 发帖数: 113 | 11 d110:d101 = 3.248:2.488 in Rutile unit cell so it is quite distinguishable.
Better to have a diffraction pattern when you take high resolution TEM image
, actually it is just a 5 second job because you just need to put SAD
aperture in and push a button. FFT is not exactly the same as diffraction
pattern since it shows forbidden points or don't show double diffraction
points sometimes. |
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A******u 发帖数: 1279 | 12 TiO2 - rutile is tetragonal, not orthorhombic. for the definitions of high-
symm points for all 14 lattice types, see
Bradley, C. J. & Cracknell, A. P. (1972). The mathematical theory of
symmetry in solids: representation theory for point groups and space groups. |
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