Citation
Nixon, P. G.; Winter, R.; Castner, D. G.; Holcomb, N. R.; Grainger, D. W.; & Gard, G. L. (2000). Pentafluoro-lambda(6)-sulfanyl-terminated chlorosilanes: New SF5-containing films and polysiloxane materials. Chemistry of Materials, 12(10), 3108-3112.Abstract
Two new SF5-terminated perfluoroalkylsilanes-SF5(CF2CF2)(n)CH2CH2SiCl3 (n = 1 and 2)were synthesized by addition of trichlorosilane to the corresponding synthetic SF5-terminated perfluoroalkenes by hydrosilylation. Thin films of these SF5-silanes on clean silicon oxide substrates were characterized by ellipsometry, aqueous contact angle, and X-ray photoelectron spectroscopy (XPS) methods. The shorter SF5-silane film shows a hydrophobic interface with minimal angle dependence in depth-dependent XPS analysis, suggesting a poorly organized film. The longer SF5-silane exhibits a high aqueous static contact angle (106 degrees) and angular-dependent XPS compositional variance consistent with improved film assembly (fewer defects and more vertical chain orientation). Bulk SF5-bearing materials were fabricated by silane hydrolysis, producing SF5-polymers and cross-linked networks bearing the unique SF5 perfluoroalkyl chemistry.Keyword(s)
fluorocarbon chainmodifiersmonolayer filmssiliconsurfaceNotes
366YTTimes Cited:15
Cited References Count:36