Physical properties of self-assembled monolayers of Mercapto Oligo (ethylene oxide) methyl ether on gold.
Physical properties (chemical adsorption rate, viscoelasticity, thickness, and conformation) for self-assembled monolayers (SAMs) of mercapto oligo (ethylene oxide) methyl ethers on gold were determined by quartz crystal microbalance (QCM). The values of thickness, shear viscosity and elastic shear modulus of SAMs increase with unit number of oligo (ethylene oxide) segment. However, the chemical adsorption rate determined by a Langmuir isotherm does not show such a unit number regularity. Those results suggest that difference in unit number of oligo (ethylene oxide) segment can significantly affects physical properties of SAMs.
Department of Information Science and Biomedical Engineering, Graduate School of Science and Engineering, Kagoshima University, Japan. myoshi@be.kagoshima-u.ac.jp
Minoru
M
Yoshimoto
Keita
K
Honda
Hidenobu
H
Aizawa
Shigeru
S
Kurosawa
Mutsuo
M
Tanaka
D000327:Adsorption; D055598:Chemical Phenomena; D005027:Ethylene Oxide / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D008738:Methyl Ethers / Q000737:chemistry*; D058525:Quartz Crystal Microbalance Techniques
D008738:Methyl Ethers; D006046:Gold; D005027:Ethylene Oxide