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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Interface science 5 (1997), S. 103-117 
    ISSN: 1573-2746
    Keywords: silica ; organosilanization ; hydrosilation ; DRIFT ; CP-MAS NMR ; ESCA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract This paper presents a general overview of the chemical modificationof oxide surfaces with particular emphasis on the silanization/hydrosilationmethod. A number of materials have been synthesized that have hydrophobic,hydrophilic, chiral and liquid crystal surfaces. The most frequently usedoxide in these materials is silica with chromatography as the primaryapplication for the chemically modified oxide surfaces. Also presented is anoverview of a number of methods used to characterize modified oxide surfacessuch as elemental analysis, diffuse reflectance infrared Fourier transformspectroscopy, solid-state NMR, electron spectroscopy for chemical analysis,scanning electron microscopy and atomic force microscopy. The particularadvantages of each method for the characterization of modified oxidematerials are discussed.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1040-7685
    Keywords: fullerenes ; liquid crystal bonded phases ; microcolumn liquid chromatography ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The liquid chromatographic separation of C60 and C70 fullerenes with liquid crystal bonded silica phases was carried out and the separation performance was evaluated with various mobile phase compositions and column temperatures. The results clearly indicate that one liquid crystal bonded phase possesses better retention capability and separation power for these fullerene molecules than commercially available octadecylsilica (ODS) phases. The capacity factors of C60 and C70 were 2.82 and 8.46, respectively, with n-hexane as the mobile phase.In contrast to the normal temperature dependency of the retention of some polycyclic aromatic hydrocarbons (PAHs) versus column temperature, unusual behaviors for C60 and C70 have been observed with the liquid crystal phase.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Electrophoresis 18 (1997), S. 2228-2238 
    ISSN: 0173-0835
    Keywords: Surface modifications ; Microchips ; Column packings ; Etching ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: A review of column technology in capillary electrophoresis (CE) including wall modification processes and open tubular as well as packed column formats in capillary electrochromatography (CEC) are presented. There are many approaches which can be used to solve separation problems which provide higher efficiency and/or shorter analysis times in comparison to other chromatographic techniques. However, both CE and CEC are still relatively undeveloped in comparison to a more mature method such as high performance liquid chromatography (HPLC) and improvement in column technology is changing rapidly.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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