Electronic Decoupling of Aromatic Molecules from a Metal by an Atomically Thin Organic Spacer


  • We acknowledge financial support from the Deutsche For-schungsgemeinschaft via grants No. FR 875/6 and FR 875/9. R.Fo. was supported by the Studienstiftung des deutschen Volkes. We are grateful to Karl Leo for stimulating discussions and suggestions. Supporting Information is available online from Wiley InterScience or from the authors.


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Electronic coupling effects of organic adsorbates to metallic surfaces are examined optically. Covering a Au(111) substrate with an ultrathin (∼0.3 nm) nanographene-like layer of flat lying molecules leads to decoupling of further molecular layers to a large extent. Our work suggests that not only inorganic salts or oxides can be used as insulating spacers but also particular organic monolayers.