We present the formation of new self-assembled monolayers (SAMs) on gold that feature nanoscale control of the SAM composition as well as the structure normal to the substrate. Our studies use dithiophosphinic acids (RR'P(S)SH), which spontaneously form SAMs by chelating to the gold surface. The use of different R and R' groups yield to unsymmetrical DTPAs, which form SAMs with a 50:50 mixture of the two groups. Characterization methods of the DTPA SAMs are made by using x-ray photoelectron spectroscopy (XPS) reflection-absorption infrared spectroscopy (RAIRS), contact angle measurements and electrochemical impedance spectroscopy (EIS). We will discuss potential uses for these new SAMs.

New class of self-assembled monolayers (SAMs) based on dithiophosphinic acids (DTPAs) with functionalized tail groups

243rd National Meeting (2012)

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