Room Temperature Discrimination of Adsorbed Molecules and Attachment Sites on the Si(111)鈥? 脳 7 Surface Using a qPlus Sensor
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- 作者：Zsolt Majzik ; Benedict Drevniok ; Wojciech Kami艅ski ; Martin Ondr谩膷ek ; Alastair B. McLean ; Pavel Jel铆nek
- 刊名：ACS Nano
- 出版年：2013
- 出版时间：March 26, 2013
- 年：2013
- 卷：7
- 期：3
- 页码：2686-2692
- 全文大小：380K
- 年卷期：v.7,no.3(March 26, 2013)
- ISSN：1936-086X
文摘
In this paper, we show that simultaneous noncontact atomic force microscopy (nc-AFM) and scanning tunneling microscopy (STM) is a powerful tool for molecular discrimination on the Si(111)鈥? 脳 7 surface, even at room temperature. Using density functional theory modeling, we justify this approach and show that the force response allows us to distinguish straightforwardly between molecular adsorbates and common defects, such as vacancies. Finally, we prove that STM/nc-AFM method is able to determine attachment sites of molecules deposited on semiconductor surface at room temperature.