Fluorinated self-assembled monolayer

Fluoride is trapped as NaF and under certain conditions the yield of per-florotetralin can be maximized. Lewis acidic sites in crystal surface defects are thought to assist in the C-F activation process and at 470°C the system is active for demineralization of chlorofluorocarbons to afford NaF, NaCl and carbon [76]. Detailed electrochemical studies of the reduction of C-F bonds in aryltrif-luoromethanes and fluoroalkoxyarenes have been reported [77]. Free radicals cleave C-F bonds of fluorinated self-assembled monolayer surfaces [78]. 

Interfacial Properties of Specifically Fluorinated Self-Assembled Monolayer Films... 

Fluorinated self-assembled monolayers (F-SAM) can be deposited either in liquid phase, hy dipping the mold direcfly into a diluted solution of anti-sticking molecules [92], or in a vapor phase process. The latter can he done either by thermal evaporation of the liquid precursor at atmospheric pressure [93] or by vacuum evaporation at room temperature [94]. Chlorosilane molecules are very reactive and able to polymerize, producing particles that can precipitate onto the mold. This is why it is preferable to use the vapor phase process with this type of molecules, leading to smoother surfaces [95]. 

Miller SA, Luo H, Cooks RG and Pachuta SJ (1997) Soft-landing of polyatomic ions at fluorinated self-assembled monolayer surfaces. Science 275 1447. 

Fig. 10.27). A fluorinated silane self-assembled monolayer was first applied to the master to aid in the separation of master and stamp. The stamp was formed using one of the following procedures. For thinner stamps, PDMS (Sylgard 184) pre-polymer mixture (1 10) was poured over the PR master and a 250 pm thick, 13-inch x 13-inch Mylar film was placed on top of the liquid PDMS. The prepolymer was evenly spread to less than 50 pm in thickness by rolling a Meyer rod over the surface of the Mylar backing film. 

It has been demonstrated that hydrophobic, fluorinated, hyperbranched poly(acrylic acid) films can passivate and block electrochemical reactions on metal surfaces thus preventing surface corrosion [57]. Hyperbranched films can be synthesized on self-assembling monolayers on the metal surface via sequential grafting reactions to obtain thick and homogeneous films. 

Fabricating Chemical Gradients on Oxide Surfaces by Means of Fluorinated, Catechol-Based, Self-Assembled Monolayers ... 

Structural Properties of Self-Assembled Monolayers on Gold Generated from Terminally Fluorinated Alkanethiols... 

Figure 2 Example of (A) an alkanethiol self-assembled monolayer surface and (B) a fluorinated alkanethiol self-assembled monolayer surface. Typical substrates are glass or silicon with a thin Ti layer (-100 A) followed by a layer of gold ( 1000 A). Reproduced with permission from Miller SA, PhD Thesis, Purdue University, 1997.

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