Microporous membranes single crystals

Preparation of microporous and porous materials with special states of aggregation such as nano and ultra-fine particles, large single crystals, perfect crystals, molecular sieve membranes, and materials with various morphologies ... 

A theoretical model describing gas transport in microporous (single crystal zeolite) membranes in regions a and bi of Fig. 9.20 was proposed by Barrer [85] and is schematically given in Fig. 9.21. 

Experimental sophistication has advanced significantly with the recent availability of high-purity materials of precise configuration such as single crystals, atomically tailored surfaces, monodispersed suspensions, and precisely patterned microporous membranes. The ability to characterize these surfaces with a variety of ex situ techniques, and then to transfer them in a controlled manner into an electrochemical environment for further in situ study, presents a dramatic advance in the sophistication of electrochemical science. The preceding section of this chapter summarizes these advances. 

---