Ray Grazing-Incidence Diffraction Studies

All characterisation and sample preparation steps were executed in an inert N2 atmosphere. The reported t values were measured by X-ray reflectivity and were found to vary from 10 nm to about 200 nm [24]. 

The scattering vector Q can be written as a function of the scattering angles and the X-ray wavelength in the following form  

The data were collected by a point detector or a ID position-sensitive detector (PSD) oriented parallel to the surface normal. It could be scanned both ho- 

Both molecular weight fractions display a well-pronounced periodicity normal to the surface due to alkyl chain stacking. The different interplanar dis-tanees for sueh staeked sheets were found to be -15.5 A and -16.5 A for low and high molecular weight fractions, respectively. This reflects the fact that 

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