Luminescent silicon

Littau KAefa/1993 A luminescent silicon nanocrystal colloid via a high temperature aerosol reaction J. Phys. Chem. 97 1224... 

Anodization of Si in HF under an applied magnetic field produces an enhancement of the PL efficiency at RT, accompanied by an enhanced porosity compared to PS samples prepared without an applied field. The degree of polarization of the emitted PL is reduced for field-assisted preparation [Na3]. At low temperatures (4.2 K), the Stokes shift and the decay time of the PL are found to be increased, if compared to PS formed under zero magnetic field. This has been interpreted as Zeeman splitting of the spin-triplet exciton states. It indicates that the ground state of the luminescing silicon crystallite is a triplet state [Kol3]. 

Luminescent silicon microstructures formed by other methods than anodization and stain etching. 

Partially functionalized cyclopolysilanes recently attracted attention as model substances for siloxene and luminescent silicon. The yellow luminescent silicon is formed by the anodic oxidation of elemental silicon in HF-containing solutions and may be used for the development of silicon-based materials for light-emitting structures which could be integrated into optoelectronic devices77. Because the visible photoluminescence of... 

Most of the contributions in Chapter IV deal with this area of research. Commercial interest is centered on the field of silicones with defined silicon substitution patterns, molecular weight, crosslinking degree and the study of structure-property correlations. In constrast the academic interest focusses on topics that may be recognized as "old" problems, such as "silyl modified surfaces", "synthesis and reactivity of silsesquioxanes", and "luminescent silicon". The reader will find answers to these problems in this chapter. 

Li ZF, Ruckenstein E (2004) Water-soluble poly(acrylic acid) grafted luminescent silicon nanoparticles and their use as fluorescent biological staining labels. Nano Lett 4 1463-1467... 

Rogozhina EV, Eckhoff DA, Gratton E, Braun PV (2006) Carboxyl functionahzation of ul-trasmaU luminescent silicon nanoparticles through thermal hydrosilylation. 1 Mater Chem 16 1421-1430... 

Other Processes of Plasma Production of Nanoparticles Synthesis of Aluminum Nanopowder and Luminescent Silicon Quantum Dots... 

Li, Z.F., M.T. Swihart, and E. Ruckenstein. 2004. Luminescent silicon nanoparticles capped by conductive polyaniline through the self-assembly method. Langmuir 20 (5) 1963-1971. 

Sailor MJ, Lee EJ (1997) Surface chemistry of luminescent silicon nanocrystallites. Adv Mater 9 783-793... 

Canham LT, Cullis AG, Pickering C, Dosser OD, Cox TI, Lynch TP (1994) Luminescent silicon aerocrystal networks prepared by anodisation and supercritical drying. Nature 368 133-135... 

N.A. Dhas, C.P. Raj, A. Gedanken, Preparation of luminescent silicon nanoparticles a novel sonochemical approach. Chem. Mater. 10, 3278-3279 (1998)... 

Hua F, Swihart MT, Ruckenstein E. Efficient surface grafting of luminescent silicon quantum dots by photoinitiated hydrosi-lylation. Langmuir 2005 21 6054-6062. 

Pezoldt, J., Kups,T., Stubenrauch, M., Fischer, M., 2011. Black luminescent silicon. Physica Status Solid C. 8 (3), 1021-1026. 

Figure 22.1 Luminescent silicone film containing an embedded Oj-sensitive Ru dye. Small disks are pierced for the film to be attached to the distal end of an optical liber for dissolved oxygen measurements in water. The indicator dye is excited with blue hght and emits red-orange luminescence, the intensity of which is quenched by the analyte gas entering the thin film and colliding with the photoexcited metal dye.

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