Template materials

Although there are numerous potential applications for MCM-41 type molecular sieves, the neutral templated materials may offer enhanced stability and a... 

The template method involves using the pores in a microporous solid as nanoscopic beakers for the synthesis of nanoparticles of the desired material [1,3,10]. A wide variety of materials are available for use as template materials [1,10,14-19]. Pore diameter sizes range from Angstroms to many p,m. Several of the more common materials used as templates are reviewed below. 

Figure la Nitrogen isotherm of a polymer templated material at 77 K (sample 5) 10 100 1000... 

Figure lb Pore size distribution of a polymer templated material calculated from the isotherm in figure la (BJHoes)-... 

Figure 2 SEM of polymer templated material of an average particle diameter of 200 nm...

Further improvements can be made to the performance of the HMS materials by preparing materials containing two different functional groups. By co-condensation of TEOS, aminopropyl trimethoxysilane and phenyl triethoxysilane, a templated material can be... 

The structure of M41S-type materials is built up of pores with amorphous walls that are formed around micelles of templating material (surfactants). One of the extreme structures of M41S-type materials (MCM-41) is a hexagonal ordering of the pores, an other extreme is a worm-hole disordered type of arrangement of the pores. A lamellar layered structure is another form in which these type of materials often (partially) appear, but this phase collapses to amorphous material upon removal of the surfactant (eg by calcination). A cubic ordering of the pores is also encountered. This form has been named MCM-48 and will not be discussed in the current paper. 

Wei ST, Jakusch M, Mizaikoff B (2006) Capturing molecules with templated materials -analysis and rational design of molecularly imprinted polymers. Anal Chim Acta 578(1) ... 

K. J. Edler, Current understanding of formation mechanisms in surfactant-templated materials, Aust. J. Chem. 58, 627-643 (2004). 

In general, microgels obtained by radiation methods can be used in various applications in the same way as conventional synthesized systems, e.g., as drug delivery templates, for encapsulation, or as microreactors [29, 30], PAAm for example can be used as template material to synthesize hollow cadmium selenide nanospheres [24], and PVP can be used for the incorporation of ferromagnetic nanoparticles to obtain magnetic hydrogel microspheres [13],... 

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