One-dimensional confinement of organic molecules via selective adsorption on CaF₁ versus CaF₂

Müllen, K.

doi:10.1016/s0009-2614(99)00236-5

One-dimensional confinement of organic molecules via selective adsorption on CaF₁ versus CaF₂

Date Issued

1999-01-01

Author(s)

Rauscher, H.

Jung, T. A.

Lin, J. -L.

Kirakosian, A.

Himpsel, F. J.

Rohr, U.

Müllen, K.

DOI

10.1016/s0009-2614(99)00236-5

Abstract

We have integrated one-dimensional organic structures into semiconductor/insulator nanostructures by controlled self-assembly. Stepped Si(111) surfaces with self-organized CaF1/CaF2 stripe patterns serve as mask for selective adsorption of 3,10-di(propyl)perylene. These molecules adsorb preferentially on CaF1 nanostripes, rather than on CaF2, This property is used to fabricate large assemblies of parallel, equidistant stripes 1-15 nm wide. We discuss the selectivity in terms of a mechanism where the HOMO and LUMO of the molecule interact with the valence band and conduction band of CaF1 and CaF2. (C) 1999 Elsevier Science B,V. All rights reserved.