H2Pc and pentacene on Cu(110)-(2 x 1)O: A combined STM and nc-AFM study

SURFACE SCIENCE

卷:696

Article

Garlant, Angel¹  Maughan, Bret²  Zahl, Percy³  Monti, Oliver L. A.^1,2 

[1] Univ Arizona, Dept Phys, 1118 East Fourth St, Tucson, AZ 85721 USA

[2] Univ Arizona, Dept Chem & Biochem, 1306 East Univ Blvd, Tucson, AZ 85721 USA

[3] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 USA

关键词: Scanning tunneling microscopy;    Noncontact atomic force microscopy;    Tip functionalization;    Nanostructured surface;   

DOI  :  10.1016/j.susc.2020.121590

来源: Elsevier

【 摘 要 】

Scanning tunneling microscopy (STM) and non-contact atomic force microscopy (nc-AFM) with a CuO tip is used to investigate adsorption of metal-free phthalocyanine (H2Pc) and pentacene on the Cu(110)-(2 x 1)O striped-phase reconstructed surface. We show that the combination of STM and nc-AFM is necessary to reveal the detailed adsorption geometry, necessary for interpreting the observed STM contrast. Comparison of the nc-AFM images with simulations shows that some of the H2Pc molecules are deformed out-of-plane on this surface, while pentacene retains its molecular geometry regardless of adsorption site. Our work highlights how the stiffness of CuO tips makes it possible to probe the structure of organic semiconductor / metal interfaces.

【 授权许可】

Free