TY - JOUR A1 - Geue, Thomas A1 - Schultz, Michael A1 - Grenzer, Jörg A1 - Natansohn, Almeria A1 - Rochon, Paul T1 - X-ray investigations of the molecular mobility with polymer surface gratings Y1 - 2000 ER - TY - JOUR A1 - Pietsch, Ullrich A1 - Rochon, Paul A1 - Natansohn, Almeria T1 - Formation of a buried lateral density grating in azopenzene polymer films Y1 - 2000 ER -