02161nas a2200253   4500008004100000022001400041245012300055210006900178260007300247300001400320490000700334520120100341653002901542653002001571653003501591653003701626653001601663100002101679700001801700700002001718700001801738700002601756856012501782       2005                        eng d  a0167-577X00aGrowth kinetics and thermodynamic stability of octadecyltrichlorosilane self-assembled monolayer on Si (100) substrate0 aGrowth kinetics and thermodynamic stability of octadecyltrichlor  aPO BOX 211, 1000 AE AMSTERDAM, NETHERLANDSbELSEVIER SCIENCE BVcDEC  a3890-38950 v593 a<p>We have studied the growth kinetics and thermodynamic stability of octadecyltrichlorosilane (OTS) self-assembled monolayers on Si (100) substrate in order to understand its role in controlling the adhesion and surface hydrophobicity. Time-dependent contact angle measurements, using water as a function of OTS concentration, show rapid monolayer formation in the initial stage followed by a slow attainment of full coverage and the overall kinetics approximately follows the Langmuir adsorption isotherm. The adsorption rate constant (k(a) = 150 M-1 s(-1)) is found to be significantly greater than the desorption rate constant (k(d) = 0.156 s(-1)) while the Gibbs free energy (Delta G(ads)) change amounts to -4.2 kcal/mol suggesting thermodynamic stability of OTS monolayer on a silicon surface. Partial monolayer formation by a `uniform' growth mechanism, even at low coverage, is revealed by atomic force microscopy (AFM) in conjunction with grazing angle FTIR spectroscopy. Analysis of the interfacial adhesion properties using Zisman plot suggests a critical surface tension (gamma(c)) of 20.7 dyn/cm for OTS monolayer on Si (100) surface. (C) 2005 Elsevier B.V. All rights reserved.</p>10aGibbs's free energy (AG)10agrowth kinetics10aoctadecyltrichlorosilane (OTS)10aself-assembled monolayers (SAMs)10aZisman plot1 aKulkarni, S., A.1 aMirji, S., A.1 aMandale, A., B.1 aGupta, R., P.1 aVijayamohanan, K., P.  uhttps://library.ncl.res.in/content/growth-kinetics-and-thermodynamic-stability-octadecyltrichlorosilane-self-assembled-0