01016nam--2200349---450099000055075020331620050719152242.088-521-24245-20055075USA010055075(ALEPH)000055075USA01005507520010709d1988----km-y0ENGy0103----baengGBScience and religionBanden Powell and the Anglican debate, 1800-1860Pietro CorsiCambridgeCambridge university press1988IX, 346 p.24 cm2001261.55CORSI,Pietro346004ITsalbcISBD990000550750203316II.2. 3494 (IV E 195)133950 LMIV EBKUMAPATTY9020010709USA01092820020403USA011704PATRY9020040406USA011638COPAT49020050719USA011522Science and religion885225UNISA03216nam 2200373z- 450 991034687420332120210212(CKB)4920000000101778(oapen)https://directory.doabooks.org/handle/20.500.12854/59831(oapen)doab59831(EXLCZ)99492000000010177820202102d2004 |y 0engurmn|---annantxtrdacontentcrdamediacrrdacarrierSpectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix [online]KIT Scientific Publishing20041 online resource3-937300-08-2 The investigation of the interfacial phase transitions in fluid systems with short-range intermetallic interactions are of great interest. The phenomena were studied in two systems exhibiting a liquid-liquid miscibility gap: at the fluid/wall interface in fluid KxKCl1-x and at the fluid/vacuum interface of the Ga1 xBix alloys. To characterize the interfacial changes of the ultra thin films (composition, thickness and their evolution with time) the spectroscopic ellipsometry was performed over a wide spectral range. Whereas in the experiments on KxKCl1-x an existing ellipsometer could be used, a completely new UHV-apparatus including the in-situ phase modulation ellipsometer had to be developed for Ga1 xBix alloys. For the KxKCl1-x system new results on complete wetting at solid-liquid coexistence as well as in the homogenous liquid phase (prewetting) are presented. The spectra show the typical F center absorption which indicates that the film is a salt-rich phase. The thickness strongly increases approaching the monotectic from 30 to 440 nm, which is in agreement with the tetra point wetting scenario. For this interpretation a quantitative description of the excess Gibbs energy has been developed. For the Ga1 xBix system the results on complete wetting, surface freezing and oscillatory interfacial instabilities are presented. The high-precision spectra have been recorded approaching the liquid-liquid miscibility. These spectra have been modeled using a Ga-Bi effective medium approximation for the substrate covered by a film of liquid Bi. The measurements give evidence of tetra point wetting in the Ga-Bi system. First ellipsometric study of the surface freezing in Ga-Bi has been performed. Within the miscibility gap a very interesting effect of surface and bulk oscillatory instability was observed. The details of this process at present are not well understood, but a qualitative description is given.Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systemsChemistrybicsscGa-Bi alloysmolten saltspectroscopic ellipsometrysurface phase transitionChemistryDogel Stanislavauth1305981BOOK9910346874203321Spectroscopic ellipsometry of interfacial phase transitions in fluid metallic systems: KxKCl1-x and Ga1-xBix3028098UNINA