Title : Novel nanocomposite for photonics: nickel pyrophosphate nanocrystals synthesized in silica nanoreactors
Unquestionably, nanophotonics is one of the most important branches of electronics. For this reason, the search for novel and more efficient laser-operated materials seems to be fully justified. Therefore, here, we show how to fabricate materials that have an enhanced non-linear optical response using a procedure of synthesis in a silica nanoreactor. We propose doing this by a transformation of the functionalized mesoporous silica (SBA-15 silica-containing nickel phosphonate units anchored inside the silica channels by propyl chains) into an optically active nanocomposite with the use of thermal processing. Obtained nanocomposite – silica with nickel pyrophosphate nanocrystals showed a strong non-linear optical response, according to our assumption. Such behavior was explained based on the following research: thermogravimetry, transmission electron microscopy (TEM), Raman vibrational analysis, N2 sorption analysis. All these methods explore the structural changes in these materials and their influence on their optical properties to be explored. Moreover, we found that the strongly catalytic properties of the nickel phosphonate molecules caused the creation of the nickel phosphate glass inside the silica pores at unusually low temperatures.