Issue 26, 2020

Initial growth of pentacene on a Si(111)- -In surface

Abstract

We have investigated the initial pentacene growth on the Si(111)-Image ID:d0cp01582b-t2.gif-In surface using scanning tunneling microscopy. At a low coverage, the molecules lie down flat and form locally ordered molecular layers that are nucleated at the Si step edges. At a higher coverage, two kinds of pentacene crystals with the so-called herring-bone arrangement are grown directly on the Image ID:d0cp01582b-t3.gif surface with the longer molecular axis (ā€˜cā€™ axis) being directed parallel to the surface. The pentacene growth on the Image ID:d0cp01582b-t4.gif surface is considered to be a 3D island growth mode. Two minor crystal structures that are poly-crystal and striped layer are also observed. All experimental results suggest that the Image ID:d0cp01582b-t5.gif surface is rather moderate compared with a reactive surface, which allows for molecular diffusion and rearrangement.

Graphical abstract: Initial growth of pentacene on a Si(111)--In surface

Article information

Article type
Paper
Submitted
24 Mar 2020
Accepted
13 Jun 2020
First published
24 Jun 2020

Phys. Chem. Chem. Phys., 2020,22, 14748-14755

Initial growth of pentacene on a Si(111)-Image ID:d0cp01582b-t1.gif-In surface

T. Suzuki, K. Yagyu and H. Tochihara, Phys. Chem. Chem. Phys., 2020, 22, 14748 DOI: 10.1039/D0CP01582B

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