TY - JOUR
T1 - Dewetting of thin polymer-blend films examined with GISAS
AU - Müller-Buschbaum, P.
AU - Gutmann, J. S.
AU - Stamm, M.
AU - Cubitt, R.
AU - Cunis, S.
AU - Von Krosigk, G.
AU - Gehrke, R.
AU - Petry, W.
N1 - Funding Information:
We want to thank M. Wolkenhauer for his help at the D22 beamline. Additionally, we owe many thanks to M. Casagrande and H. Walter for the assistance at the BW4 beamline. This work was supported by the DFG Schwerpunktprogramm “Benetzung und Strukturbildung an Grenzflächen” (Sta 324/8-1) and J.S.G. acknowledges support by the GKSS project V6.1.01.G.01-HS3.
PY - 2000/6
Y1 - 2000/6
N2 - The morphology of dewetted thin polymer-blend films of deuterated polystyrene (dPS) and polyparamethylstyrene (PpMS) on top of silicon surfaces is investigated. The film thickness of the originally homogeneous films is varied between 19 and 104 angstroms. Compared to the radius of gyration of the unperturbed molecule, Rg = 106 angstroms, the as-prepared films are confined in the direction perpendicular to the sample surface. The dewetting results from the storage of the samples under toluene vapor atmosphere. Atomic force microscopy (AFM) and grazing incidence small-angle scattering (GISAS) are used. From the differences in the GISAS data measured with X-rays compared to data measured with neutrons a random distribution of the molecules inside the individual droplets is determined. Thus from dewetting under toluene atmosphere no periodicity in the internal structure exists. The, within all methods derived, most prominent in-plane length corresponds to the mean droplet distance. Its function of film thickness is explainable by the spinodal dewetting model.
AB - The morphology of dewetted thin polymer-blend films of deuterated polystyrene (dPS) and polyparamethylstyrene (PpMS) on top of silicon surfaces is investigated. The film thickness of the originally homogeneous films is varied between 19 and 104 angstroms. Compared to the radius of gyration of the unperturbed molecule, Rg = 106 angstroms, the as-prepared films are confined in the direction perpendicular to the sample surface. The dewetting results from the storage of the samples under toluene vapor atmosphere. Atomic force microscopy (AFM) and grazing incidence small-angle scattering (GISAS) are used. From the differences in the GISAS data measured with X-rays compared to data measured with neutrons a random distribution of the molecules inside the individual droplets is determined. Thus from dewetting under toluene atmosphere no periodicity in the internal structure exists. The, within all methods derived, most prominent in-plane length corresponds to the mean droplet distance. Its function of film thickness is explainable by the spinodal dewetting model.
UR - http://www.scopus.com/inward/record.url?scp=0342520917&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(99)01891-8
DO - 10.1016/S0921-4526(99)01891-8
M3 - Conference article
AN - SCOPUS:0342520917
SN - 0921-4526
VL - 283
SP - 53
EP - 59
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - 1-3
T2 - 6th International Conference on Surface X-ray and Neutron Scattering (SXNS-6)
Y2 - 12 September 1999 through 17 September 1999
ER -