Heat-Induced Phase Separation of Self-Assembled Monolayers of a Fluorocarbon-Hydrocarbon Asymmetric Disulfide on a Au(111) Surface

Abstract

Estimates of the mean value of the random strain are made for three ruby samples containing CrJ-ions from an examination of the thermally detected EPR lineaidths. Mean strains of the order of are deduced,

High-Resolution X-ray Photoelectron Spectra of Organosulfur Monolayers on Au(111): S(2p) Spectral Dependence on Molecular Species

“…The structures of alkanethiol or dialkyl disulfide organosulfur self-assembled monolayers (SAMs) on a Au(111) surface have been extensively studied using many analytical tools such as X-ray photoelectron spectroscopy (XPS), [1][2][3][4][5][6][7][8][9][10][11][12] scanning probe microscopy (SPM), [13][14][15][16][17][18][19][20][21][22][23][24] X-ray or helium diffraction techniques, [25][26][27] electrochemical measurements, [28][29][30][31] and thermal desorption spectroscopy (TDS) 32,33 from a viewpoint of basic surface science. * To whom correspondence should be addressed.…”

“…Here we review XPS sulfur peak of alkanethiol or dialkyl disulfide monolayers. [10][11][12]18,[28][29][30] It is believed that SAM films made from alkanethiols and disulfides were structurally the same, and that both species formed alkanethiolate on Au surfaces. 5 Formerly, only broad sulfur 2p (S(2p)) XPS spectra of SAMs were observed using a conventional X-ray source.…”

“…12,38 On the other hand, the 161 eV peak appearance in the alkanethiol and dialkyl disulfide is not generally accepted, although the 161 eV peak is often observed in the high-resolution XPS data. 18,29 Moreover, the sulfur adsorption states of monosulfide and thiophene onto the Au surface is poorly understood compared with alkanethiol and dialkyl disulfide SAMs. It is reported that monosulfide monolayers exhibited similar S(2p) spectra to that of alkanethiol SAMs at around 162 eV.…”

“…The structures of alkanethiol or dialkyl disulfide organosulfur self-assembled monolayers (SAMs) on a Au(111) surface have been extensively studied using many analytical tools such as X-ray photoelectron spectroscopy (XPS), − scanning probe microscopy (SPM), − X-ray or helium diffraction techniques, − electrochemical measurements, − and thermal desorption spectroscopy (TDS) 32,33 from a viewpoint of basic surface science. Although many reports have been published in the past decade, as reviewed by Ulman, there still remain many unsolved questions, especially concerning the chemical state of sulfur on the Au surface.…”

“…Here we review XPS sulfur peak of alkanethiol or dialkyl disulfide monolayers. − ,,− It is believed that SAM films made from alkanethiols and disulfides were structurally the same, and that both species formed alkanethiolate on Au surfaces . Formerly, only broad sulfur 2p (S(2p)) XPS spectra of SAMs were observed using a conventional X-ray source. − Generally, S(2p) spectra of alkanethiol or dialkyl disulfide SAMs exhibit two strong peaks at around 162 eV (S(2p 3/2 )) and 163.2 eV (S(2p 1/2 )).…”