Stable π-radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) adsorbed at the elbows of 22 x √3 reconstructed Au(111)

SURFACE SCIENCE

卷:700

Article

Vranik, Radovan¹  Stetsovych, Vitalii¹  Feigl, Simon¹  Muellegger, Stefan^1,2 

[1] Johannes Kepler Univ Linz, Inst Semicond & Solid State Phys, Altenberger Str 69, A-4040 Linz, Austria

[2] Johannes Kepler Univ Linz, Linz Inst Technol, Altenberger Str 69, A-4040 Linz, Austria

关键词: Picrylhydrazyl;    DPPH;    Radical;    STM;    Au(111);    Kondo;   

DOI  :  10.1016/j.susc.2020.121676

来源: Elsevier

【 摘 要 】

Stable organic radicals serve as model systems for investigating metal-free magnetic phenomena at (sub)nanometer length scales. We have investigated at the single-molecule level the stable pi-radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) adsorbed at the elbow sites of the 22 x root 3 reconstructed Au(111) surface. Low -temperature scanning tunneling microscopy (STM) and-spectroscopy under ultrahigh vacuum conditions at 8 K reveal structural as well as frontier-orbital related electronic details of DPPH/Au(111). A Kondo-like spectroscopic signature indicates preservation of the unpaired electron spin state.

【 授权许可】

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