Photoluminescence: Photoluminescent Porous Si/SiO₂ Core/Shell Nanoparticles Prepared by Borate Oxidation (Adv. Funct. Mater. 36/2014)

Abstract

The preparation of luminescent core–shell nanoparticles of porous silicon is reported by M. J. Sailor and co‐workers on page 5688. The “shell” in these nanoparticles is a passivating silicon oxide layer, synthesized by partial oxidation of the quantum‐confined crystalline silicon skeleton in an aqueous solution of sodium tetraborate (borax). Control of the chemistry of the passivation layer is found to be crucial to maximize the quantum yield and to control the rate of aqueous dissolution of the resulting nanoparticles.

Analyte-responsive gated hollow mesoporous silica nanoparticles exhibiting inverse functionality and an AND logic response

“…Core/shell nanoparticles have attracted much attention in recent years [1][2][3][4][5][6][7][8][9][10][11][12][13][14] due to their adaptability to many different fields and applications such as electronics, 5,15,16 biomedical, 11,[17][18][19] pharmaceutical, 20 optics, [21][22][23] and catalysis. 24,25 Hollow mesoporous silica nanoparticles (MSNs) are of particular interest because the presence of the hollow cavity can act as a reservoir which can be controllably filled with another material yielding a core/shell nanoparticle.…”