Molecular Electrostatics of Conjugated Self-Assembled Monolayers on Au(111) Using Electrostatic Force Microscopy

Langmuir ◽  
2002 ◽  
Vol 18 (13) ◽  
pp. 5120-5125 ◽  
Author(s):  
S. Howell ◽  
D. Kuila ◽  
B. Kasibhatla ◽  
C. P. Kubiak ◽  
D. Janes ◽  
...  
Keyword(s):  
Electrostatic Force ◽  
Self Assembled Monolayers ◽  
Electrostatic Force Microscopy ◽  
Force Microscopy ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Molecular Electrostatics

Surface Potentials of Conjugated Molecules on Metal Surfaces: Measurements Using Electrostatic Force Microscopy and Calculations using a Preliminary Physically-Based Model.

2000 ◽  
Vol 636 ◽  
Author(s):  
S. Howell ◽  
D. Kuila ◽  
A. W. Ghosh ◽  
T. Rakshit ◽  
H. McNally ◽  
...  
Keyword(s):  
Surface Potential ◽  
Electrostatic Force ◽  
Self Assembled Monolayers ◽  
Electrostatic Force Microscopy ◽  
Conjugated Molecules ◽  
Physically Based Model ◽  
Force Microscopy ◽  
Physically Based ◽  
Aromatic Thiols ◽  
Assembled Monolayers

AbstractThe electrostatic surface potential of self-assembled monolayers (SAMs) of aliphatic and aromatic thiols has been measured using electrostatic force microscopy. The variation of the surface potential of chemisorbed alkanethiols, with respect to bare Au(111), is observed to increase with increasing chain length. The trend is similar to that observed in the literature. A preliminary theoretical model, based on treating the monolayer as a sheet of dipoles, has been used to calculate the surface potential of alkanethiols. Similar measurements on several aromatic thiols, with a symmetric and non-symmetric molecular structure, reveal that non-symmetric systems have significantly higher potential (≥ 170mV) than the symmetric molecules.

Preparation and Characterization of γ-Aminopropyltrimethoxysilane and Octadecyltrichlorosilane Self-Assembled Monolayers on Titanium Films

2008 ◽  
Vol 373-374 ◽  
pp. 472-475 ◽  
Author(s):  
C.G. Sun ◽  
Hui Chen Zhang
Keyword(s):  
Ultraviolet Radiation ◽  
Friction Force ◽  
Self Assembled Monolayers ◽  
Sliding Velocity ◽  
Friction Property ◽  
Titanium Film ◽  
Photochemical Process ◽  
Force Microscopy ◽  
Assembled Monolayers ◽  
Self Assembled

In this work, the self-assembled monolayers of γ-aminopropyltrimethoxysilane and octadecyltrichlorosilane were prepared on titanium films, radiated and solidified by ultraviolet radiation/ozone photochemical process. The characterization and friction properties of titanium film, APS SAMs, OTS SAMs and the radiated APS SAMs, OTS SAMs were explored by atomic force microscopy and friction force microscopy. The effects of functional groups, sliding velocity, load and ultraviolet radiation/ozone photochemical process on friction properties of SAMs were analyzed. The experimental results show that the titanium film coated with SAMs, especially under ultraviolet radiation/ozone, is exhibited with a good friction property. The friction property of APS SAMs is better than OTS SAMs under or no ultraviolet radiation/ozone. The friction force increases with the increasing of sliding velocity and decreases with the increasing of load.

Self-assembled monolayers of sulfonate-terminated alkanethiols investigated by frequency modulation atomic force microscopy in liquid

2017 ◽  
Vol 28 (45) ◽  
pp. 455603 ◽  
Author(s):  
Hitoshi Asakawa ◽  
Natsumi Inada ◽  
Kaito Hirata ◽  
Sayaka Matsui ◽  
Takumi Igarashi ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Frequency Modulation ◽  
Self Assembled Monolayers ◽  
Force Microscopy ◽  
Atomic Force ◽  
Assembled Monolayers ◽  
Self Assembled
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