Colloid imprinting technique

Yoshida, M. Hatate, Y. Uezu, K. Goto, M. Furusaki, S., Chiral-recognition polymer prepared by surface molecular imprinting technique, Colloids Surf A. 2000, 169, 259-269... 

Unfortunately, to date, this technique has received little attention from the molecular imprinting community and only one report of a dispersion polymerisation method had appeared until very recently [26]. This is probably better classified as a precipitation polymerisation, since random aggregates were produced rather than beads. No colloidal stabilisers were included in this procedure. The aggregates were made in situ in chromatography columns, which avoided the need to grind and sieve the polymer and pack the columns. Due to the rather polar nature of the solvent mixtures used (cyclohexanol, dodecanol, isopropanol), good imprints were only achieved for compounds which interact strongly with functional monomer... 

In previous chapters, we have already discussed the mass-sensitive detection of both small molecules and microorganisms and thus have covered the analyte size range below 1 nm and above 10 nm. The gap in between is bridged by macromolecules and some colloidal particles. Special analytical interest is devoted to biomacromolecules, such as proteins and enzymes and nucleic acids, which are also of chnical interest. For these classes of compounds, a wide variety of rapid testing techniques exist, which can also be seen by the mun-ber of excellent and recent reviews both on protein [59] and DNA [60-62] detection. Due to the broad range of techniques already available in chemistry and clinical science, MIP sensor applications for these analytes are still somewhat rare. For entire DNA strands, no imprinting strategy related to... 

Rg. 1 It is shown how ideas from the ancient bell-casting technique (a) are transferred to obtain nanoporous materials (b-c). This process, accordingly named nanocasting, uses nanoseale template structures (b) ranging from molecules (i) to colloidal crystals (vi). This template structure is imprinted into a solid hybrid material (c). Finally, after removal cf the template, one ideally achieves a pore resembling the template. (View this art ia color at www.dekker.com.)... 

Our previous papers [15,16] and the current work show that die imprinting of mesophase pitch particles with colloidal silica is an efficient technique to prepare mesoporous carbons with uniform spherical pores as well as carbons with bimodal pore size distributions. These carbons exhibit negligible amount of micropores, which can be further eliminated during graphitization process. If micropores are need, they can be created by controlled oxidation analogous to that used in the preparation of activated carbon fibers. The possibility of tailoring the size of uniform spherical mesopores is of great importance for catalysis, adsorption and other advanced applications such as die manufacture of hi -quaiity electrochemical double-layer capacitors, fuel cells and lidiium batteries. 

B.B. Prasad, A. Srivastava and M.P. Tiwari, Highly selective and sensitive analysis of dopamine by molecularly imprinted stir bar sorptive extraction technique coupled with complementary molecularly imprinted polymer sensor, J. Colloid Inter/. Set, 396 234-241, 2013. 

The authors present the following techniques of template synthesis molecular imprinting, colloid crystal templating, micellar imprinting, polymerization within sponge phases, and so on. 

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