Introduction Motivated by continuously growing global energy demands and the depletion of readily accessible fossil fuels; the search for alternative energy sources, particularly renewable solar energy, has become vital. Despite the clear advantages associated with the adoption of solar cells, they need to be cost-effective and priced competitively in comparison to conventional energy resources...

A novel technique is described that uses either time-resolved or steady state prompt photosensitizer fluorescence to measure local oxygen concentration. Solution experiments conducted with Al(III) phthalocyanine chloride tetrasulfonic acid confirmed that the steady state fluorescence signal is dependent on the oxygen concentration and fluence rate. A relationship between prompt sensitizer fluor...

A strong increase in the efficiency of isotope-selective infrared laser multiphoton dissociation 11 BCl 3 molecules natural mixture with 10 by radiation a pulsed CO 2 case admixture SF 6 molecules, which serve as sensitizer and simultaneously acceptors radicals, Cl atoms formed has been detected. The yield selectivity several times threshold energy density for decreases significantly their irra...

In this work, the critical diameter for detonation was measured for Nitromethane (NM) sensitized with two different amines: Diethylenetriamine (DETA) and Triethylamine (TEA). The critical diameter in glass and polyvinylchloride tubes is found to decrease rapidly as the amount of sensitizer is increased, then increase past a critical amount of sensitizer. Thus the critical diameter reaches a min...

The utilization of solar energy via photoelectrochemical cells (PEC) towards hydrogen (H2) production is a promising approach in the field artificial photosynthesis. In this work, synthesis and complete characterization first covalently linked porphyrin-cobalt diimine-dioxime dyad (ZnP-Co) reported. synthetic procedure that was followed based on simple high yielding reactions, without using any...

Conditional photofragmentation is achieved with binary systems incorporating the isophthaloyl bis-aminopyridine barbiturate recognition motif and dithiane- or trithiane-based photolabile modules, which cleave only in the presence of an external sensitizer. The components of the host-guest molecular recognition pair were each outfitted with either the sensitizer or the photocleavable module. In ...

objective: in order to overcome the limitation of systemic administration of methylene blue, this study investigated the encapsulation of methylene blue in polymeric liposomes and drug release following sonication. methods: we encapsulated methylene blue into nanoliposomes. the dynamic light scattering (dls) method was used to measure the size distribution of the liposomes. after loading methyl...

Important progress is being made in the development of a Si based waveguide laser operating at 1.5 μm. The gain medium responsible for the recent progress is Er-doped Si nanocrystal co-doped SiO2, a composite material that can potentially be fabricated using a VLSI compatible process. The material combines the broad absorption spectrum of Si nanocrystals with the efficient narrow linewidth emis...

Metallophthalocyanines (MPc-o-Cou, M = Fe, Co, Ni, and Cu) with fourth period metal ions have been successfully applied as a sensitizer coupled with rubrene (Rub) in photon upconversion based on triplet-triplet annihilation. An upconversion quantum yield (ϕPUC) of up to 4.82% was observed in the CoPc-o-Cou : Rub couple. The absorption and phosphorescence emission spectra showed that the Q bands...

We report a new class of molecular insulators that electronically passivate the surface of nanocrystalline titania films for high performance dye sensitized solar cells (DSC). Using electrical impedance measurements we demonstrate that co-adsorption of dineohexyl bis-(3,3-dimethyl-butyl)-phosphinic acid (DINHOP), along with the amphiphilic ruthenium sensitizer Z907Na increased substantially the...