Chemical Identification of Single Atoms in Heterogeneous III鈥揑V Chains on Si(100) Surface by Means of nc-AFM and DFT Calculations
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- 作者：Martin Setv铆n ; Pingo Mutombo ; Martin Ondr谩膷ek ; Zsolt Majzik ; Martin 艩vec ; Vladim铆r Ch谩b ; Ivan O拧t鈥櫭al ; Pavel Sobot铆k ; Pavel Jel铆nek
- 刊名：ACS Nano
- 出版年：2012
- 出版时间：August 28, 2012
- 年：2012
- 卷：6
- 期：8
- 页码：6969-6976
- 全文大小：520K
- 年卷期：v.6,no.8(August 28, 2012)
- ISSN：1936-086X
文摘
Chemical identification of individual atoms in mixed In鈥揝n chains grown on a Si(100)-(2 脳 1) surface was investigated by means of room temperature dynamic noncontact AFM measurements and DFT calculations. We demonstrate that the chemical nature of each atom in the chain can be identified by means of measurements of the short-range forces acting between an AFM tip and the atom. On the basis of this method, we revealed incorporation of silicon atoms from the substrate into the metal chains. Analysis of the measured and calculated short-range forces indicates that even different chemical states of a single atom can be distinguished.