Multiphasic composite hybrid monoliths

The concept of fabrication of transparent silica gel-PMMA composites in two phases was introduced by Pope et al. in the late 1980s [22] as a procedure to prepare large sol-gel monoliths with desired optical and mechanical properties. The principle of the concept is reinforcing the silica skeleton with organic polymer without influencing the optical quality. This concept is based on the ability to use the sol-gel technology to carry out a chemical preparation of an inorganic oxide, such as silica, under carefully controlled conditions, which produces pores 

A method for detecting the microenvironment Inside a monolith using spectral methods was presented in Ref. [104], The probing was done by measuring 

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