Surface imprinting technique

Araki, K. Goto, M. Furusaki, S. Enantioselective pol mer prepared by surface imprinting technique using a bifunctional molecule. Anal. Chim. Acta. 2002, 469, 173-181. 

By a surface imprinting technique, in Zhang H. et al., 2011, a comfX)site imprinted material, on the basis of a MWCNTs-incorporated layer using melamine as a template, methacrylic acid as a functional monomer, and ethylene glycol dimethaciylate as a cross-linker, was synthesized. In this work, the poly(acrylic-acid)-functionalized CNTs were synthesized to increase the diameter of CNTs. Then, the vinyl group was introduced to the surface of poly(acrylic-acid)-functionalized CNTs by an amidation Using Melamine as a template molecule, imprinted CNT composite material was fabricated by a thermal fX)lymeiization. Applied as a sorbent, the imprinted materials were used for the determination of Melamine in the spiked sample by online SPE combined with HPLC. 

Various novel imprinting techniques have also been presented recently. For instance, latex particles surfaces were imprinted with a cholesterol derivative in a core-shell emulsion polymerization. This was performed in a two-step procedure starting with polymerizing DVB over a polystyrene core followed by a second polymerization with a vinyl surfactant and a surfactant/cholesterol-hybrid molecule as monomer and template, respectively. The submicrometer particles did bind cholesterol in a mixture of 2-propanol (60%) and water [134]. Also new is a technique for the orientated immobilization of templates on silica surfaces [ 135]. Molecular imprinting was performed in this case by generating a polymer covering the silica as well as templates. This step was followed by the dissolution of the silica support with hydrofluoric acid. Theophylline selective MIP were obtained. 

In this section, surface imprinting which is carried out in O/W emulsion will be reviewed [22-26]. Maeda et al. presented the concept of the technique as illustrated in Scheme 9.7. This technique relies on a cooperative interaction of multiple func-... 

Another technique was proposed as an efficient method for the preparation of surface-template resins. In surface imprinting, a functional surfactant (emulsilier) that is capable of binding metal ions and functions as a vinyl monomer must orient at the interface between the matrix monomers and water and emulsify the mixture. 

While this approach to surface imprinting is attractive, it has only been demonstrated for metal ion imprinting to date. If the technique could be extended to encompass small organic molecules then it would have far greater impact, and would have particular relevance to agglutination type assays, and use with tagged macromolecules, where access to surface-localised binding sites is crucial. 

Suzuki A, Tada M, Sasaki T, Shido T, Iwasawa Y (2002) Design of catalytic sites at oxide surfaces by metal-complex attaching and molecular imprinting techniques. J Mol Catal A Chem 182-183 125... 

Imprint techniques have been a proven and important method in damage analysis of textiles for a long period of time. It is often advantageous not to investigate the original object under the microscope but rather the negative imprint of its surface ... 

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