大家好,又到了每周一题的时间了.需要说明的是,由于目前稿源严重不足,在接下来的日子里,我能做的可能只是列个题目和相关问题,内容的填充需要靠我们大家.
在这里任何一项活动,仅仅依靠某个人或某几个人都很难坚持下去,毕竟我们大家都有自己的相关课题要跟进.因此,只要您是chem8的一员,无论您是否担任斑竹,都希望您能就您所熟悉的话题总结一下,然后发至chem8org@gmail.com,一人分享,万人受益,期待您的来稿.
今天我们谈论的话题是石墨烯,石墨烯一度被认为是学术分子(academic molecule),
1 物理学家曾认为任何二维晶体在有限温度下不允许存在.2004年Science上的一篇文章立即震撼了整个凝聚态物理界.
2 激发了来自化学,物理,材料,工程等各个学科科学家的兴趣.有人曾预测,第一个基于石墨烯的芯片或许10年就后出现.果真如此?让我们拭目以待.
下面我先贴下通过搜索引擎找到的一些信息.更多关于石墨烯的相关信息,欢迎大家回帖给出自己的理解,回帖前请确定下帖已阅:
http://chem8.org/bbs/thread-19976-1-2.html
注意:若回帖内容出自其他地方,请注意给出出处,谢.下期预告:C-F键的活化.
1.什么是石墨烯?3
让我们先看看维基百科:"Graphene is a one-atom-thick planar sheet of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. It is the strongest known material. It can be viewed as an atomic-scale chicken wire made of carbon atoms and their bonds. The name comes from GRAPHITE + -ENE; graphite itself consists of many graphene sheets stacked together."简而言之:单层sp2杂化的碳原子构成二维蜂窝状物质.
2.有何特性?
a.薄
4
定义里提到了,单层原子厚度. (How many graphene sheets are in a 2mm thick slab of graphite? ~6 million)
b.硬
5
钻石还坚硬,强度比世界上最好的钢铁还要高上100倍.
c.快
6
常温下具有极快的电子传输速率. (比曾经最快的半导体材料砷化镓快30倍,比硅快100倍,因此可以说是目前最快的半导体)
3.制备4
加热SiC的方法
轻微摩擦法或撕胶带法
化学分散法
参考文献:
1. Geim, A. K. and Novoselov, K. S. The rise of graphene. Nature Mater. 6, 183-191 (2007)
[Fulltext]
2. Novoselov, K.S. et al. Electric Field Effect in Atomically Thin Carbon Films. Science 306, 666 (2004)
[Fulltext]
3.
http://en.wikipedia.org/wiki/Graphene
4.
http://zh.wikipedia.org/wiki/石墨烯
[Fulltext]
5.
http://baike.baidu.com/view/1744041.htm
6.
http://www.electronicsweekly.com ... t-semiconductor.htm
以上资料来源于互联网,描述不当之处欢迎跟帖指正,补充,谢.
吧内目前有以下贴涉及这一专题：
Scaling up graphene production:
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene racks up the charge
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene shows promise of storing large quantities of renewable electrical energy
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Closest Look Ever At Graphene: Stunning Images Of Individual Carbon Atoms From TEAM 0.5 Microscope
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene pioneers follow in Nobel footsteps
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
World's thinnest balloon made of graphene
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
First successful fabrication of a graphene-on-silicon structure
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene has record-breaking strength
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Physicists reveal new secrets about graphene
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Surprising graphene - honing in on graphene electronics with infrared synchrotron radiation
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
By adding graphene, researchers create superior polymer
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
IBM researchers see quantized conductance in graphene
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene-based gadgets may be just years away
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Flexible Graphene Films via the Filtration of Water-Soluble Noncovalent Functionalized Graphene Sheets
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene makes for better optical displays
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Physicists show electrons can travel over 100 times faster in graphene than in silicon
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Half-Metallicity in Edge-Modified Zigzag Graphene Nanoribbons
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
The rise of graphene
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene: From strength to strength
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene sheets with less flap
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
Graphene p-n junction is unveiled
http://chem8.org/bbs/viewthread. ... ;highlight=graphene
科学家发现可大量生产石墨烯的新方法
http://chem8.org/bbs/viewthread.php?tid=20573
石墨烯p-n结的电导平台研究
http://chem8.org/bbs/viewthread.php?tid=20169
人工合成13C石墨和石墨烯
http://chem8.org/bbs/viewthread.php?tid=19785
高质量石墨烯制备成功
http://chem8.org/bbs/viewthread.php?tid=19584
石墨烯中电子局域化问题研究
http://chem8.org/bbs/viewthread.php?tid=19370
石墨纳米带有望成半导体新材料
http://chem8.org/bbs/viewthread.php?tid=16425
双层石墨烯可降低元器件电噪声
http://chem8.org/bbs/viewthread.php?tid=14774
透过石墨烯一瞥精细结构常数
http://chem8.org/bbs/viewthread.php?tid=14390
双螺旋结构导电性堪比石墨圈
http://chem8.org/bbs/viewthread.php?tid=14334
石墨烯可在水中稳定分层
http://chem8.org/bbs/viewthread.php?tid=13119
丙酮 对环氧石墨复材电性能影响大
http://chem8.org/bbs/viewthread.php?tid=6866
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