24小时热门版块排行榜    

查看: 1471  |  回复: 10
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

mixiao777

新虫 (著名写手)

[求助] 碳纳米管的光激发光发射强度 photoluminescence emission intensities

在看一篇碳纳米管的文献,里面有这样的一副图,图标是“Contour plots of normalized
photoluminescence emission intensities under various excitations for the Fe–Ru SWCNTs grown at various temperatures”,实在是看不懂什么意思,这个图有什么意义?并且文中还说“The FeRu catalyst system facilitated the growth of small-diameter SWCNTs with predominantly of (6, 5)SWCNTs. ”其中(6,5)是啥意思呀,坐标?指的是图中的那个点嘛?求高手解答一下~~

未命名.jpg
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

alexanderp

金虫 (著名写手)

引用回帖:
4楼: Originally posted by mixiao777 at 2012-11-13 10:17:59
这个n,m怎么测得呢?比如说我合成一个样品,怎样得到他的(n,m),是用什么仪器嘛?...

就是光致荧光谱(photoluminescence excitation-emission spectroscopy).谱线分析,参考以下文献,类似特征峰位表。
1)S. M. Bachilo, M. S. Strano, C. Kittrell, R. H. Hauge, R. E. Smalley, and R. B. Weisman, Science 298, 2361 2002.
2) R. B. Weisman and S. M. Bachilo, Nano Lett. 3, 1235 2003.
3) J. Lefebvre, J. M. Fraser, Y. Homma, and P. Finnie, Appl. Phys.A 78, 1107 2004

» 本帖已获得的红花(最新10朵)

6楼2012-11-13 16:21:55
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 11 个回答

sally208

专家顾问 (著名写手)

【答案】应助回帖

★ ★ ★
感谢参与,应助指数 +1
mixiao777: 金币+3, ★★★很有帮助, 受益~ 2012-11-13 16:40:48
http://en.wikipedia.org/wiki/Carbon_nanotube

... The structure of a SWNT can be conceptualized by wrapping a one-atom-thick layer of graphite called graphene into a seamless cylinder. The way the graphene sheet is wrapped is represented by a pair of indices (n,m). The integers n and m denote the number of unit vectors along two directions in the honeycomb crystal lattice of graphene. If m = 0, the nanotubes are called zigzag nanotubes, and if n = m, the nanotubes are called armchair nanotubes. Otherwise, they are called chiral. The diameter of an ideal nanotube can be calculated from its (n,m) indices as follows
......
2楼2012-11-12 18:36:29
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

alexanderp

金虫 (著名写手)

【答案】应助回帖

★ ★
感谢参与,应助指数 +1
mixiao777: 金币+2, ★★★很有帮助, 受益~ 2012-11-13 16:41:08
三幅图是不同CVD温度下生长的碳管,在测试PL时,得到的信号强度,也就是激励-发射谱,激励从550nm扫描到850nm, 谱仪检测从900nm-1450
nm的发射光子。
Fe-Ru二元催化剂,有利于(6,5)手性碳纳米管的生长,对应的PL 谱位置坐标为(983,567)。

» 本帖已获得的红花(最新10朵)

3楼2012-11-12 22:55:05
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

mixiao777

新虫 (著名写手)

引用回帖:
2楼: Originally posted by sally208 at 2012-11-12 18:36:29
http://en.wikipedia.org/wiki/Carbon_nanotube

... The structure of a SWNT can be conceptualized by wrapping a one-atom-thick layer of graphite called graphene into a seamless cylinder. The way the  ...

这个n,m怎么测得呢?比如说我合成一个样品,怎样得到他的(n,m),是用什么仪器嘛?
4楼2012-11-13 10:17:59
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
信息提示
请填处理意见