Oxidizing octadecylphosphonic acid molecules without disrupting their self-assembled monolayers

2013 ◽  
Vol 5 (18) ◽  
pp. 4911 ◽  
Author(s):  
Heng-Yong Nie
Keyword(s):  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Octadecylphosphonic Acid

Octadecylphosphonic Acid Self-Assembled Monolayers as Lubricant Coatings Stable in Alkaline Media

2004 ◽  
Vol 847 ◽  
Author(s):  
J. Soullier ◽  
P. Tordjeman ◽  
P. H. Mutin
Keyword(s):  
Alkaline Media ◽  
Self Assembled Monolayers ◽  
Water Contact ◽  
Force Microscopy ◽  
Assembled Monolayers ◽  
Naoh Solution ◽  
Self Assembled ◽  
The Stability ◽  
Planar Substrates ◽  
Octadecylphosphonic Acid

ABSTRACTThe formation of octadecylphosphonic acid self-assembled monolayers (SAMs) on titanium deposited by cathodic sputtering on planar substrates has been studied by water contact angle measurements and Atomic Force Microscopy (AFM). Dense monolayers were obtained after one week of reaction. Tribological experiments indicated that these monolayers had good lubricating properties, which were maintained after immersion in a 1 M NaOH solution at 65 °C for up to 100 min. The stability in alkaline media of octadecylphosphonic acid SAMs on titanium was ascribed to the high chemical stability of Ti-O-P interfacial bonds.

scholarly journals Octadecylphosphonic Acid Self-Assembled Monolayers Obtained Using Rapid Dipping Treatments

2018 ◽  
Vol 43 (5) ◽  
pp. 305-309 ◽  
Author(s):  
Toshiya Bamba ◽  
Tadashi Ohtake ◽  
Yusuke Ohata ◽  
Heng-yong Nie ◽  
Takahiko Ban ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Octadecylphosphonic Acid

Atomic Force Microscopy Studies of Microstructure and Properties of Self Assembled Monolayers

1998 ◽  
Vol 4 (S2) ◽  
pp. 308-309
Author(s):  
Jecksan R. Santiago ◽  
E. Barry Troughton ◽  
Richard A. Dennis ◽  
Phillip E. Russell
Keyword(s):  
Ex Situ ◽  
Self Assembled Monolayers ◽  
Distance Curve ◽  
Force Microscopy ◽  
Atomic Force ◽  
Assembled Monolayers ◽  
Self Assembled ◽  
Octadecylphosphonic Acid ◽  
Section Analysis

Ex-situ and in-situ studies were performed for self-assembled monolayers (SAMs) formation on mica. The behavior of two surfactants [octadecylphosphonic acid (OPA) and dodecylphosphonic acid (DPA)] in two different solutions [ethanol or tetrahydrofuran (THF)] were studied at different concentrations. A cross section analysis of the monolayer images at partial coverage showed thickness of 1.8 nm, 0.7 nm, and 1.0 nm for OPA, DPA and mixed OPA/DPA, respectively. These values are similar to the ones presented by Xiao and those expected for a monolayer of mixed surfactants as proposed by Whitesides. Since the topography of a monolayer resembles the substrate, the presence of the monolayer at full coverage was determinated by force-distance curve measurements. It was observed that the solvent had the ability to re-dissolve the OPA monolayer, suggesting that the bonding is of a physisorption nature.

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