Quadratic rotation-orthogonal composite experimental design was applied in this experiment to obtain the ultraweak luminescence property of mint affected by multilateral growth environmental factors including illumination, temperature, humidity, and moisture. The influence models of four factors on luminescence were established. Analysis showed that different factors and their interactions had ...

Fucus zygotes can be polarized by many environmental vectors. These include those created by pieces of all the intertidal marine plants tested. At distances of up to 5-10 mm away from such pieces, Fucus zygotes form their intitial outgrowths or germinate towards them. Earlier papers had inferred that this so-called 'thallus effect' is mediated by diffusing molecules. The present reinvestigation...

The effect of carbon doping on the enhancement of visible luminescence from silicon-rich silicon oxide ~SRSO!, which consists of Si nanoclusters embedded inside a SiO2 matrix, is investigated. C-doped SRSO films were fabricated by electron cyclotron resonance-plasma enhanced chemical vapor deposition method using SiH4 , O2 , and CH4 source gases followed by a high-temperature anneal. Intense bl...

The effect of an external magnetic field on the intensity of electrogenerated chemiluminescence (ecl) was determined for nine systems involving anthracene, 9,lO-diphenylanthracene (DPA), rubrene, 1,3,6,%tetraphenylpyrene (TPP), and fluoranthene as emitting species in N,N-dimethylformamide (DMF) solutions. Enhancements in emission intensity up to 27% with increasing field strength were noted for...

Self-aggregating calix[4]arenes carrying four DOTA ligands on the upper rim for stable complexation of paramagnetic GdIII-ions have already been proposed as MRI probes. In this work, we investigate the luminescence properties of TbIII-DOTA-calix[4]arene-4OPr containing four propyl-groups and compare them with those of the analog substituted with a phthalimide chromophore (TbIII-DOTA-calix[4]are...

Highly transparent and luminescent CaMoO4:Eu/Ag composite films were fabricated on glass substrates as multifunctional antireflective (AR) coatings. The films were deposited through a combination of a sol–gel dip-coating technique and a hot water treatment. With the addition of an aluminum source in coating solutions, the sol–gel-derived films underwent a remarkable microstructural change durin...

Direct-bandgap semiconductor with high quantum radiative efficiency can operate as a scintillator despite being ‘‘opaque’’ to its own luminescence. An interband absorption does not finish off the luminescence but merely creates a new minority carrier, which in turn recombines in a predominately radiative fashion. To take full advantage of this ‘‘photon recycling’’ effect, optically-tight integr...

Filaments produced in air by intense femtosecond laser pulses emit UV luminescence from excited N(2) and N(2)(+) molecules. We report on a strong dependence at high intensities (I≥1.4×10(14)  W/cm(2)) of this luminescence with the polarization state of the incident laser pulses. We attribute this effect to the onset of new impact excitation channels from energetic electrons produced with circul...

Laser cooling in semiconductor structures due to anti-Stokes luminescence is reviewed. Theoretical background considering luminescence trapping and red-shifting, the effect of free carrier and back-ground absorption, Pauli bandblocking, and the temperature-dependence of various recombination mechanisms are discussed. Recent experimental results demonstrating record external quantum efficiencies...

The interaction between semiconductor nanowires (NWs) and metallic nanocolloids were studied upon bioconjugation of two biomaterials: d-biotin and streptavidin. 5-fold intensity enhancement of luminescence and a blue shift of the emission peak were observed after conjugation with Au NPs. It can be interpreted in terms of the electromagnetic field enhancement effect in the presence of metallic N...