Determination of Thickness of a Self-Assembled Monolayer of Dodecanethiol on Au(111) by Angle-Resolved X-ray Photoelectron Spectroscopy

Study of the solvent effect on the quality of dodecanethiol self-assembled monolayers on polycrystalline gold

“…The u values of these monolayers were calculated to be 23.8 ± 3.5°and 22.7 ± 3.7°, respectively. These values are better than those of other SAMs and similar to previous reports (17 ± 1 Å and 25-30°) [32,37]. This again indicates that a highly dense and organized C 12 SH-SAMs can be formed from EtOH-H 2 O and neat C 12 SH liquid.…”

“…The average cant angle u value of this monolayer was roughly calculated using u = arccos(d/l), assuming a trans-extended hydrocarbon chain with no gauche defects, where l is the length from gold surface to the chain end of C 12 SH (20.3 Å) [31][32]; difference value of the current density at À0.2 V and 0.5 V (Di p = i p,À0.2 V À i p,0.5 V ) was obtained from cyclic voltammogram performed in 0.1 M Na 2 SO 4 containing 2 mM K 3 Fe(CN) 6 …”

Rapid formation of high-quality self-assembled monolayers of dodecanethiol on polycrystalline gold under ultrasonic irradiation

“…The d value of the C 12 SH-SAM formed under ultrasonic irradiation at 100 W (0.1 W cm −2 ) for 15 min was calculated to be 17.5Å. The tilt angle ϕ value of the molecules in this monolayer was calculated to be 30 • using ϕ = 57.3 arccos(d/l), where l is the length from gold surface to the chain end of C 12 SH (20.3Å) [17,18]. These values are better than those of other SAMs and similar to previous reports (17 ± 1Å and 25 • -30 • ) [18,19].…”

“…The tilt angle ϕ value of the molecules in this monolayer was calculated to be 30 • using ϕ = 57.3 arccos(d/l), where l is the length from gold surface to the chain end of C 12 SH (20.3Å) [17,18]. These values are better than those of other SAMs and similar to previous reports (17 ± 1Å and 25 • -30 • ) [18,19]. This again indicates that a highly dense and organized C 12 SH-SAM can be formed under ultrasonic irradiation at 100 W (0.1 W cm −2 ) for 15 min.…”

Single molecular switch based on thiol tethered iron(II)clathrochelate on gold

“…When n = 1, the CPE can be considered as an ideal capacitor (Q = C d ) [29][30][31][32][33][34]. The "n" value of DDT SAM and IC-DDT SAM were 0.96 and 0.76, respectively.…”