Decomposition of alkanethiols adsorbed on Au (1 1 1) at low temperature

Adsorption states and thermal desorption behaviors of thiophene derivative self-assembled monolayers on Au(111)

“…In the case of an alkanethiol SAM, the dimer fragments are firstly observed at about 380 K, and then, the monomer fragment was detected at the higher temperature [18,20,21]. On the other hand, the TD spectra of TP SAM showed the different desorption process [10].…”

“…Thermal desorption spectroscopy (TDS) is a powerful method for examining the adsorption energy, thermal stability, and desorption behaviors. These problems for alkanethiol SAMs on gold have been thoroughly characterized by TDS studies [18][19][20][21][22][23][24][25].…”

The coordination chemistry of gold surfaces: Formation and far-infrared spectra of alkanethiolate-capped gold nanoparticles

“…On the other hand, in HREELS studies of methanethiol on Au(1 1 1), the SH stretch was detected, indicating binding of thiol, not thiolate [13]. In temperatureprogrammed-desorption studies of alkanethiols on Au(1 1 1) H 2 was found to desorb below the desorption temperature of the parent thiol for octanethiol (at 280 K), but not for lower thiols [14]. In 2002 Hasan et al detected bound S-H by proton NMR on 2-5-nm particles and provided the first direct evidence for this bonding mode on nanoparticles [5].…”

Do Methanethiol Adsorbates on the Au(111) Surface Dissociate?

“…Based on the shape of the potential-energy diagram scaled with the heat of alkanethiol adsorption on Au(111), it was suggested that S-H bond dissociation may occur for alkanethiols [3]. Kodama et al reported thiolate radical desorption for alkanethiol from the Au(111) surface [4]. The TPD and X-ray photoelectron spectroscopy (XPS) studies by Liu and co-workers indicated the dissociative adsorption of the methanethiol on Au(111) [5].…”