Korean Journal of Chemical Engineering, Vol.26, No.6, 1778-1784, November, 2009
Characterization of octadecyltrichlorosilane self-assembled monolayers on the silicon (100) surfaces
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Both monolayers and multilayers were obtained from a dilute solution of
n-octadecyltrichlorosilane [OTS, CH3(CH2)17SiCl3] on a SiO2/Si surface after a low pressure O2 plasma treatment. A close-packed monolayer of good quality was formed on the SiO2/Si surface. The resulting self-assembled layers were characterized by goniometry, atomic force microscopy (AFM), ellipsometry and Fourier transformed infrared attenuated total reflection (FTIR-ATR) spectroscopy. An examination of the time-dependent water contact angle measurements as a function of the OTS concentration revealed rapid monolayer formation at the initial stage. The contact angle measurements showed that the surface structure of the OTS monolayer was quite resistant to environmental changes as a result of the polymerization of OTS molecules and the formation of covalent bonds between the monolayer and substrate surface. The surface was
covered with islands (observed by AFM) that were in-filled to produce in a smooth surface. The FRIR-ATR spectra showed symmetric (νs(CH2)) and asymmetric (νas(CH2)) components perpendicular to the surface.
- Bain CD, Troughton EB, Tao YT, Evall J, J. Am. Chem. Soc., 111, 321 (1989)
- Porter MD, Bright TB, Allara DL, Chidsey CED, J. Am. Chem. Soc., 109, 3559 (1987)
- Silberzan P, Leger L, Ausserre D, Benattar JJ, Langmuir, 7, 1647 (1991)
- Ge S, Takahara A, Kajiyama T, J. Vac. Sci. Technol. A, 12(4), 2530 (1994)
- Kulkarni SA, Mirji SA, Mandale AB, Gupta RP, Vijayamohanan KP, Materials Letters, 59, 3890 (2005)
- Balgar T, Bautista R, Hartmann N, Hasselbrink E, Surface Science, 532, 963 (2003)
- Brzoska JB, Benazouz I, Rondelez F, Langmuir, 10(11), 4367 (1994)
- Rye RR, Nelson GC, Dugger MT, Langmuir, 13(11), 2965 (1997)
- Bunker BC, Carpick RW, Assink RA, Thomas ML, Hankins MG, Voigt JA, Sipola D, de Boer MP, Gulley GL, Langmuir, 16(20), 7742 (2000)
- Zenkiewicz M, Adhesion Sci. Technol., 15, 1769 (2001)
- Rozlosnik N, Gerstenberg MC, Larsen NB, Langmuir, 19(4), 1182 (2003)
- Jiang P, Li SY, Sugimura H, Takai O, Appl. Surf. Sci., 252(12), 4230 (2006)
- Wasserman SR, Tao YT, Whitesides GM, Langmuir, 5, 1074 (1989)
- Parikh AN, Allara DL, Azouz IB, Rondelez F, J. Phys. Chem., 98(31), 7577 (1994)
- Schwartz DK, Steinberg S, Israelachvili J, Zasadzinski JAN, Phys. Rev. Lett., 69, 3354 (1992)
- Steiner G, Moller H, Savchuk O, Ferse D, Adler HJ, Salzer R, J. Mol. Struc., 563, 273 (2001)