Self-assembled monolayers organic reactions

Some improvement was observed with pentacene deposited on top of silane layers, but it was also observed that the silane deposition is not easy to control, and side-reactions often result in rough layers with considerable unreacted content remaining. An alternative approach relies on application of self-assembled monolayers which mimic vapor-deposited silanes [32, 33] on the dielectric interface of the organic devices. Figure 2.6 shows an overview of the different surface-treatment application methods discussed in this section. 

Surface monolayers on water, metals, silica or organic polymers do also not only self-organize or self-assemble , but they can be selectively functionalized as well with dyes, stereoselective receptors or nanoholes. Several monolayers can also be synkinetized subsequently to form redox chains with different electron donors or acceptors in multilayers. Vectorial reaction chains can thus be materialized in synkinetic materials. 

Interfacial reactions on surfaces are becoming increasingly important due to their widespread applications. Self assembled monolayers (SAMs) provide excellent platforms to study these reactions. This review focuses on the various organic reactions carried out on these SAMs. Challenges and limitations of organic reactions at surfaces are discussed. Emerging biocatalytic techniques for carrying out surface reactions are reviewed. 

The AuNPs can also be prepared by the two-phase micro-emulsion method in which, first the metal-containing reagent is transferred from an aqueous to an organic phase. After the addition of a surfactant solution to this system, a micro-emulsion, i.e., a dispersion of two imntiscible liquids, is formed. In micro-emulsion methods, alkane thiols are often added to the reaction solution, and tliese additives form dense self-assembled monolayers on the gold surface. This method was employed for the preparation of self-assembled two- and three-dimensional ensembles of AuNPs [12,13,50]. 

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