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mesoporous silica
Mesoporous silica is a mesoporous form of silica and a recent development in nanotechnology. The most common types of mesoporous nanoparticles are MCM-41 and SBA-15. Research continues on the particles, which have applications in catalysis, drug delivery and imaging.
==History==
A procedure for producing mesoporous silica was patented around 1970.〔Chiola, V.; Ritsko, J. E. and Vanderpool, C. D. ("Process for producing low-bulk density silica." ) Application No. US 3556725D A filed on 26-Feb-1969; Publication No. US 3556725 A published on 19-Jan-1971〕〔("Porous silica particles containing a crystallized phase and method" ) Application No. US 3493341D A filed on 23-Jan-1967; Publication No. US 3493341 A published on 03-Feb-1970〕〔("Process for producing silica in the form of hollow spheres" ); Application No. US 342525 A filed on 04-Feb-1964; Publication No. US 3383172 A published on 14-May-1968〕 It went almost unnoticed and was reproduced in 1997. Mesoporous silica nanoparticles (MSNs) were independently synthesized in 1990 by researchers in Japan. They were later produced also at Mobil Corporation laboratories and named Mobil Crystalline Materials, or MCM-41.
Six years later, silica nanoparticles with much larger 4.6 to 30 nanometer pores were produced at the University of California, Santa Barbara. The material was named Santa Barbara Amorphous type material, or SBA-15. These particles also have a hexagonal array of pores.
The researchers who invented these types of particles planned to use them as molecular sieves. Today, mesoporous silica nanoparticles have many applications in medicine, biosensors, thermal energy storage and imaging.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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