The role of surface electronic structure in thin film molecular ordering.

Journal Article · Sun May 01 00:00:00 EDT 2005 · Proposed for publication in Physical Review Letters.

OSTI ID:970724

Sakurai, T ^[1]; Tromp, R M ^[2]; Meyer zu Heringdorf, F ^[3]; Sadowski, J ^[1]; Thayer, Gayle Echo

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1. Tohoku University, Sendai, Japan
2. T. J. Watson Research Center, Yorktown Heights, NY
3. University of Duisburg-Essen, Germany

We show that the orientation of pentacene molecules is controlled by the electronic structure of the surface on which they are deposited. We suggest that the near-Fermi level density of states above the surface controls the interaction of the substrate with the pentacene {pi} orbitals. A reduction of this density as compared to noble metals, realized in semimetallic Bi(001) and Si(111)(5 x 2)Au surfaces, results in pentacene standing up. Interestingly, pentacene grown on Bi(001) is highly ordered, yielding the first vertically oriented epitaxial pentacene thin films observed to date.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 970724
• Report Number(s): SAND2005-2960J
• Journal Information: Proposed for publication in Physical Review Letters., Journal Name: Proposed for publication in Physical Review Letters.
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRONIC STRUCTURE
ENERGY-LEVEL DENSITY
ORIENTATION
PENTACENE
SUBSTRATES
THIN FILMS