Europhys. Lett.
Volume 61, Number 5, March 2003
Page(s) 639 - 645
Section Condensed matter: structure, mechanical and thermal properties
Published online 01 February 2003
DOI: 10.1209/epl/i2003-00119-4
Europhys. Lett., 61 (5) , pp. 639-645 (2003)

Multiple-scaled polymer surfaces investigated with micro-focus grazing-incidence small-angle X-ray scattering

P. Müller-Buschbaum1, S. V. Roth2, M. Burghammer2, A. Diethert1, P. Panagiotou1 and C. Riekel2

1  TU München, Physik-Department, LS E13 James-Franck-Str. 1, 85747 Garching, Germany
2  ESRF - BP 220, 38043 Grenoble Cedex 09, France

(Received 29 July 2002; accepted in final form 20 December 2002)

We show that a position-sensitive sample surface information of multiple-scaled polymer films is successfully addressed with micro-focus grazing-incidence small-angle X-ray scattering ( $\mu$-GISAXS). From the analysis of the diffuse scattering without further model assumptions the length scale of the heterogeneous structures is determinable. The method is illustrated by an example of two-step dewetted polystyrene (PS) films exhibiting droplets on a nano scale in coexistence with mesoscopic drops. The results are compared to scanning force microscopy measurements. As compared to the conventional transmission geometry using the same micro-focus optics the resolvable length scale is increased by one order of magnitude.

61.10.Eq - X-ray scattering (including small-angle scattering).
61.41.+e - Polymers, elastomers, and plastics.
68.55.Jk - Structure and morphology; thickness; crystalline orientation and texture.

© EDP Sciences 2003