Silica is a very important industrial material and has found
widespread applications.1,2 In particular, silica nanoparticles
with high surface area (porous and/or with a small particle
size), are of high interest to many key chemical applications,
such as sorption, insulating, sensing, separation, and catalysis.3,4
Recently, porous silica for biomedical applications, such as
controlled release and biosensing, have also been explored.5,6