| Abstract
| - The structural and interfacial properties of self-assembled monolayers (SAMs) on gold derived from theadsorption of a series of 1,1,1-tris(mercaptomethyl)alkanes (i.e., CH3(CH2)mC[CH2SH]3, where m = 9, 11,13, 15) were investigated. The new SAMs, which possess uniformly low densities of alkyl chains, werecharacterized by ellipsometry, contact angle goniometry, and polarization modulation infrared reflectionabsorption spectroscopy. Additional analysis of the SAMs by X-ray photoelectron spectroscopy permitteda direct calculation of the packing densities of the SAMs on gold. The results as a whole, when comparedto those obtained on SAMs generated from normal alkanethiols (CH3(CH2)m+2SH), 2-alkylpropane-1,3-dithiols (CH3(CH2)mCH[CH2SH]2), and 2-alkyl-2-methylpropane-1,3-dithiols (CH3(CH2)mC(CH3)[CH2SH]2)having analogous chain lengths, demonstrate that the 1,1,1-tris(mercaptomethyl)alkanes afford SAMswith alkyl chains having the lowest packing density and least conformational order.
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