, P. S. and Axe, J. 0., J. Am. Chem. Soc., 1989, 111, 5852- 5861. 252. "Comparison of Self-Assembled Monolayers on Gold: Coadsorption of Thiols and Disulfides", Bain, C. D., Biebuyck, H. A. and Whitesides, G. M., Langmuir, 1989, 5, 723-727. 251. "Attenuation Lengths of Photoelectrons in Hydrocarbon Films