Patterned adhesives

Action patterns Adhesion domains Affinity and mechanism-based inhibitors Catalytic domains Classification schemes Hydrolases Lyases Mechanism of action Phosphorylases Proteinaceous inhibitors... 

W. Xu and C.-H. Choi, Experimental studies on evaporation kinetics and wetting dynamics of nanofluid droplets on superhydrophobic surfaces of micropost patterns,/. Adhesion Sci. Technol., 25,1305-1321 (2011). 

Arnold, M., Schwieder, M., Blummel, J., Cavalcanti-Adam, E.A., Lopez-Garda, M., Kessler, H. et al (2009) Cell interactions with hierarchically structured nano-patterned adhesive surfaces. Sofi Matter,... 

Illustration of the principle of contact splitting. The separation force of the patterned adhesive (f spiit) increases with the total number of split-up contacts (n)... 

Lopez G P, Aibers M W, Schreiber S L, Carroi R, Peraita E and Whitesides G M 1993 Convenient methods for patterning the adhesion of mammaiian-ceiis to surfaces using seif-assembied monoiayers of aikanethioiates on goid J. Am. Chem. Soc. 115 5877-8... 

Patterns of ordered molecular islands surrounded by disordered molecules are common in Langmuir layers, where even in zero surface pressure molecules self-organize at the air—water interface. The difference between the two systems is that in SAMs of trichlorosilanes the island is comprised of polymerized surfactants, and therefore the mobihty of individual molecules is restricted. This lack of mobihty is probably the principal reason why SAMs of alkyltrichlorosilanes are less ordered than, for example, fatty acids on AgO, or thiols on gold. The coupling of polymerization and surface anchoring is a primary source of the reproducibihty problems. Small differences in water content and in surface Si—OH group concentration may result in a significant difference in monolayer quahty. Alkyl silanes remain, however, ideal materials for surface modification and functionalization apphcations, eg, as adhesion promoters (166—168) and boundary lubricants (169—171). 

Synthetic resins are extensively used, e.g., in surface finishes, in the fabrication and repair of boat and motor vehicle bodies, in the manufacture of laminated boards, for electrical components, in pattern making and in paints and varnishes. Non-rubber adhesives made from fish glues and from cotton derivatives (e.g. cellulose acetate) tend not to be sensitizing but, depending upon composition and the manner of use, many other types may pose significant dermatitic and fume hazards. 

Fig. 21. Patterns of rate dependency of adhesion energy observed in contact mechanical measurements (Eqs. 63 and 64) [117].

---