02128nas a2200253   4500008004100000022001400041245011800055210006900173260009500242300001200337490000800349520114900357653002301506653001401529653002301543653003501566653001801601653003501619100002101654700002801675700002201703700001901725856013001744       2006                        eng d  a0021-979700aSuppression of electron-transfer characteristics of ferrocene by OTS monolayer on a silicon/electrolyte interface0 aSuppression of electrontransfer characteristics of ferrocene by   a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcJUL  a777-7840 v2993 a<p>The passivating behavior of self-assembled monolayers (SAMs) of octadecyltrichlorosilane (OTS) on an n-type Si(100) electrode with and without a redox species like ferrocene in a polar non-aqueous medium has been investigated using techniques like contact angle measurements, Fourier transform infrared (FTIR) spectroscopy and X-ray photoelectron spectroscopy (XPS) to understand the role of the monolayer. The electron-transfer behavior of ferrocene is found to be drastically affected by the presence of monolayer and the reasons for these are analyzed as a function of the change in resistance, dielectric thickness and coverage of the monolayer. Electrochemical impedance analysis in the presence of ferrocene gives the monolayer coverage as 0.998 and the apparent rate constant calculated from this gives 4.85 x 10(-12) cm s(-1) in comparison with 4.4 x 10(-8) cm s(-1) for a similar electrode without any monolayer. A positive shift of 200 mV in the flat-band potential after monolayer formation also suggests the covalent coupling of the silane nionolayer offering a protective barrier. (c) 2006 Elsevier Inc. All rights reserved.</p>10acyclic voltammetry10aferrocene10aimpedance analysis10aoctadecyltrichlorosilane (OTS)10arate constant10aself-assembled monolayer (SAM)1 aKulkarni, S., A.1 aKakade, Bhalchandra, A.1 aMulla, Imtiaz, S.1 aPillai, V., K.  uhttps://library.ncl.res.in/content/suppression-electron-transfer-characteristics-ferrocene-ots-monolayer-siliconelectrolyte-0