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Pulsed Laser Deposition of Silver Films on Alkanethiol Monolayers. A diffusion-pumped high vacuum system was built for pulsed laser deposition studies. A variety of metal films deposited on self-assembled monolayers (SAMs) will be studied in order to elucidate the nature of the metal-organic interface. Using the second harmonic (532 nm) of a Nd:YAG laser, silver was laser deposited on a dodecanethiol monolayer chemisorbed to Au(111). Annealed gold balls provide the (111) surface. The surface is characterized using atomic force microscopy, which provides qualitative information about the nature of interaction between the organic functional group on the SAM and the metal overlayer. Current studies include observing the effect of varying laser power, duration of deposition, and distance of the sample from the metal source on thin film morphology. |
