24小时热门版块排行榜    

Znn3bq.jpeg
查看: 2503  |  回复: 9
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

yalefield

金虫 (文坛精英)

老汉一枚

[交流] 停停停,站站站,电荷分布不用算! 已有8人参与

IBM公司使用特殊的原子力显微镜——开尔文探针力显微镜,在低温环境和超高真空内,直接为单个萘酞菁有机分子内的电荷分布进行了成像。

http://www.nature.com/nnano/jour ... /nnano.2012.20.html

Imaging the charge distribution within a single molecule
Fabian Mohn, Leo Gross, Nikolaj Moll & Gerhard Meyer
Nature Nanotechnology (2012) doi:10.1038/nnano.2012.20

Scanning tunnelling microscopy and atomic force microscopy can be used to study the electronic and structural properties of surfaces, as well as molecules and nanostructures adsorbed on surfaces, with atomic precision, but they cannot directly probe the distribution of charge in these systems. However, another form of scanning probe microscopy, Kelvin probe force microscopy, can be used to measure the local contact potential difference between the scanning probe tip and the surface, a quantity that is closely related to the charge distribution on the surface. Here, we use a combination of scanning tunnelling microscopy, atomic force microscopy and Kelvin probe force microscopy to examine naphthalocyanine molecules (which have been used as molecular switches) on a thin insulating layer of NaCl on Cu(111). We show that Kelvin probe force microscopy can map the local contact potential difference of this system with submolecular resolution, and we use density functional theory calculations to verify that these maps reflect the intramolecular distribution of charge. This approach could help to provide fundamental insights into single-molecule switching and bond formation, processes that are usually accompanied by the redistribution of charge within or between molecules.

回复此楼

» 收录本帖的淘帖专辑推荐

热门前沿研究

» 猜你喜欢

» 本主题相关商家推荐: (我也要在这里推广)

» 本主题相关价值贴推荐,对您同样有帮助:

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

xiaowu759

铁杆木虫 (著名写手)


小木虫(金币+0.5):给个红包,谢谢回帖
此乃计算和实验方法完美结合的典范
7楼2012-03-02 16:46:52
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 10 个回答

三闲斋主

荣誉版主 (文坛精英)

优秀版主优秀版主

技术如此先进
2楼2012-03-01 10:08:46
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

beipiao616

金虫 (小有名气)


小木虫(金币+0.5):给个红包,谢谢回帖
不知道什么时候国内才能有,早着呢
荆棘鸟
3楼2012-03-01 10:10:39
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

天棚元帅

木虫 (著名写手)


小木虫(金币+0.5):给个红包,谢谢回帖
额。。。强大。。。
A man gets what he earns when he earns it.
4楼2012-03-01 11:03:54
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 284求调剂 +8 让我上岸吧阿西 2026-04-09 10/500 2026-04-09 18:34 by 段伟艳
[考研] 085500求调剂材料 +4 易11122 2026-04-09 4/200 2026-04-09 17:16 by 1753564080
[考研] 085404,285分求调剂 +10 薇薇考研 2026-04-07 11/550 2026-04-09 16:06 by may_新宇
[考研] 工科273调剂 +4 X1999 2026-04-09 5/250 2026-04-09 16:05 by wp06
[考研] 材料与化工专硕306分找合适调剂 +27 沧海轻舟e 2026-04-06 28/1400 2026-04-08 22:06 by wdyheheeh
[考研] 材料科学与工程320求调剂,080500 +12 黄瓜味薯片 2026-04-06 12/600 2026-04-08 16:26 by luoyongfeng
[考研] 338求调剂 +8 wxygxsaaaaa 2026-04-06 8/400 2026-04-08 06:58 by 无际的草原
[考研] 11408 325分 +3 jgtxuxgkx 2026-04-07 3/150 2026-04-07 23:10 by lbsjt
[考研] 293求调剂 +3 勇远库爱314 2026-04-06 3/150 2026-04-07 11:15 by hugr
[考研] 08600生物与医药-327 +9 18755400796 2026-04-05 9/450 2026-04-06 22:35 by 52305043001
[考研] 华南理工0703化学,总分336求调剂 +10 手机用户 2026-04-03 11/550 2026-04-06 22:20 by michael2011
[考研] 生物学调剂 可调剂到生物与医药 +3 李政莹 2026-04-06 3/150 2026-04-06 19:02 by macy2011
[考研] 生物与医药调剂 +4 十七sa 2026-04-05 4/200 2026-04-05 20:05 by lys0704
[考研] 材料调剂 +7 dxy调剂 2026-04-04 7/350 2026-04-05 09:15 by 陌秋26
[考研] 求调剂 +3 ffyyu 2026-04-02 3/150 2026-04-04 19:03 by 蓝云思雨
[考研] 11408 一志愿西电,277分求调剂 +4 zhouzhen654 2026-04-03 4/200 2026-04-04 18:10 by 猪会飞
[论文投稿] 求文献 5+3 ys879651$ 2026-04-02 3/150 2026-04-04 17:22 by bobvan
[考研] 272求调剂 +4 松柏常青5 2026-04-03 4/200 2026-04-04 17:03 by babysonlkd
[考研] 调剂 +5 asdasdassda 2026-04-03 6/300 2026-04-03 20:27 by 岸上的一条鱼
[考研] 专硕085601求调剂 +7 suyifei 2026-04-03 8/400 2026-04-03 14:00 by 欣喜777
信息提示
请填处理意见