Regensburg 2013 – scientific programme

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DS: Fachverband Dünne Schichten

DS 11: Poster Session I: Application of thin films; Ion beam induced surface patterns; Ion and electron beam induced processes; Micro- and nanopatterning (jointly with O)

DS 11.17: Poster

Monday, March 11, 2013, 17:00–20:00, Poster B1

Molecule aggregate position control on patterned surface — •Wenchong Wang, Hong Wang, Harald Fuchs, and Lifeng chi — Physikalisches Insitut, Westfälische-Universität Münster, Wilhelm-klemm-Str. 10, 48149 Münster, Germany

Small molecular weight organic molecules are of great interest owing to their intensive applications. However, techniques for producing organic patterns, like photolithography in inorganic semiconductors, is still urgently sought for in device processing.

Considering a molecule deposited on a substrate surface at elevated temperature, the molecule could nucleate either at defect locations, step edges or aggregate together to form a stale nuclei. Previously, we have demonstrated to grow molecules on the pre-defined *defects* and *step edges* by using template induced growth strategies. However, molecule aggregate position control is extremely difficult owing to the statistic diffusion process of molecule on surface. Here we present a way to create molecule density distribution over a limited surface. The molecules nucleate initially at locations with highest density, leading to an aggregate position control.

Reference:

1. W. C. Wang, and L. F. Chi, Acc. Chem. Res., 2012, 45, 1646.

2. W. C. Wang, L. F. Chi, et al, Small, 2011, 7, 1403.

3. W. C. Wang, L. F. Chi, et al, Adv. Mat. 2010, 22, 2764.

4. W. C. Wang, L. F. Chi, et al, Adv. Mat. 2009, 21, 4721.

5. W. C. Wang, L. F. Chi, et al, Phys. Rev. Lett., 2007, 98, 225504.