SELF-ASSEMBLED MONOLAYERS OF ALKENES ON HYDROGEN-TERMINATED SILICON (100) SURFACES

Abstract

The preparation in the formation of self-assembled monolayers on silicon surfaces has allowed us the technological advancement of new organic semiconductor materials, obtaining devices that stand out for their electrical properties at the nanometric scale1. For this investigation, the reaction between alkenes and hydrogenated surface of Si (100) was considered to form self-assembled organic monolayers2. The organic molecules of alkenes used were 1-dodecene, 1-tetradecene, 1-hexadecene and 1-octadecene, which stand out for the functionalization process of these organic films. For the treatment of the silicon surface, a previous hydrogenation3,4 reaction was considered, obtaining Si-H functional groups on the surface. Regarding, the formation reaction of the organic monolayer, the silicon substrate of the hydrogenated surface reacted with each of the alkenes5 at 220°C for 2 hours. The experimental techniques used as the AFM (Atomic Force Microscopy) technique, the measurement of the contact angle between water droplets and the substrate, and the potential step verify the presence of the hydrogenated surface and the self-assembled organic monolayers on the surface.