Dissociation of Single 2-Chloroanthracene Molecules by STM-Tip Electron Injection
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- 作者：Denis V. Potapenko ; Zhisheng Li ; Richard M. Osgood
- 刊名：The Journal of Physical Chemistry C
- 出版年：2012
- 出版时间：February 23, 2012
- 年：2012
- 卷：116
- 期：7
- 页码：4679-4685
- 全文大小：330K
- 年卷期：v.116,no.7(February 23, 2012)
- ISSN：1932-7455
文摘
We have studied the adsorption and tip-induced chemistry of 2-chloroanthracene on TiO2(110). STM images show that at 135 K and low coverage, i.e., 0.1 ML, these molecules are physisorbed along the five-coordinated titanium rows on the rutile(110) surface as a result of electrostatic interaction. Applying electric pulses >2.5聽V from the STM tip to individual molecules causes either desorption or dissociation of the molecules, as indicated by the changes in the STM images. We have observed dissociative electron capture of a single 2-chloroanthracene molecule, which leaves behind a surface chlorine atom adsorbed in the on-top configuration on a surface Ti atom. The threshold energy required for the dissociation was found to be 2.7 eV.