Bandgap tunable

Phthalocyanines have attracted particular attention as potential surface modifiers due to their stability and tendency to form ordered structures directed by dispersion forces. They are inherently host-guest structures with a readily interchangeable coordinating metal ion, which in the solid state results in a tunable bandgap. At a surface, in addition to possibly interesting electronic... 

G. Grem and G. Leising, Electroluminescence of wide-bandgap chemically tunable cyclic conjugated polymers, Synth. Met., 57 4105-4110, 1993. 

Zhang Y, Tang TT, Girit C et al (2009) Direct observation of a widely tunable bandgap in bilayer graphene. Nature 459 820-823... 

Foulger, S., Lattam, A., Jiang, P. et al., Photonic bandgap composites exhibiting tunable color characteristics, Adv. Mater., 15, 685, 2003. 

Qnantnm dots (QDs) are nearly spherical flnorescent nanocrystals composed of semicondnctor materials that bridge the gap between individual atoms and bulk semiconductor sohds. Owing to the quantum-size effect, they exhibit size-tunable bandgaps and luminescence energies. They can be fabricated in a variety of materials, such as small regions of one material being buried in another material... 

Reviews on polythiophenes, polysquarines, polybenzenes, etc. have appeared elsewhere, which also discuss the tunability of the bandgap of conjugated polymers [7]. Further sections of this chapter will focus on the synthesis and characterization of the underivatized thienothiophenes (a-c) and conjugated... 

Ternary CdZnS nanocrystals display unique properties that fall between those of CdS and ZnS. These properties include a direct bandgap, high absorption coefficients in the blue and UV regions, and a composition-tunable and size-tunable bandgap from 2.4 to 3.7 eV. CdZnS nanoparticles were synthesized by injecting a stock solution of N-oleoylmorphine (NOM) into cadmium stearate (Cd(St)2) and zinc stear-ate(Zn(St)2) in NOM solution in ambient air. NOM serves as both the... 

The ability of the MLCT ES in Ru(ll) polypyridyl compounds to undergo facile excited state ET reactions, combined with the stability of the complexes and the tunability of their ES properties, makes this class of compounds attractive candidates for a number of practical applications. Ruthenium(ll) polypyridyl compounds have already found applications in the field of photovoltaics as sensitizers for wide-bandgap semiconductors (such as Ti02) and as photocatalysts for the photochemical splitting of water. Their photophysical and photoredox properties... 

Chapter 5. Tunable Photonic Bandgaps Induced by Standing-Wave Fields and Related Topics... 

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