Structural Investigation of Monolayers Prepared by Deposition of (CH3S)2 on the (111) Face of Single-Crystal Gold
Citations Over TimeTop 10% of 2002 papers
Abstract
Although self-assembled monolayers made of long chains of n-alkanethiols [CH3(CH2)n-1SH] on Au(111) have been extensively studied in the past, the driving forces behind the appearance of the (3 × 2√3) superlattice observed at full coverage are still not completely understood. To focus on the role played by the sulfur headgroup minimizing the interactions between chains and to prevent a possible X-ray-induced damage, we have carried out a He atom diffraction study of the adsorption of the shortest (n = 1) thiol radical, obtained by dissociative adsorption of (CH3S)2, on the Au(111) surface. Contrary to current literature reports, domains of the hexagonal (√3 × √3)R30° structure are observed to convert into the well-ordered (3 × 2√3) superstructure after annealing times of a few hours. The observation of peaks forbidden by the (3 × 2√3) model proposed by Fenter et al. (Fenter, P.; Eberhardt, A.; Eisenberger, P. Science 1994, 266, 1216) suggests a distortion of the symmetry of the unit cell. The observed chemisorption and physisorption energies were in good agreement with the literature.
Related Papers
- → Corrosion inhibitors: physisorbed or chemisorbed?(2021)314 cited
- → Chemisorption, physisorption and hysteresis during hydrogen storage in carbon nanotubes(2013)122 cited
- → Electronic structure calculations of physisorption and chemisorption on oxide glass surfaces(2005)53 cited
- → Theoretical investigation on coadsorption effect of O2 and H2O on Pt(111) surface(2015)10 cited
- Hydrogen Chemisorption and Physisorption on the Two-Dimensional TiC Sheet Surface(2014)