6814 Suchergebnisse für: „“
Chemical degradation mechanisms of highly efficient blue phosphorescent emitters used for organic light emitting diodes
The stability and the degradation processes of two highly efficient blue-emitting phosphorescent materials, iridium(III) bis(40,60-difluorophenylpyridinato)tetrakis(1-pyrazolyl) borate (FIr6) and bis(2-(4,6-difluorophenyl)...
PublikationenQuartz microfluidic chip for tumour cell identification by Raman spectroscopy in combination with optical traps
Three important technical innovations are reported here towards Raman-activated cell sorting. Firstly, a microfluidic chip made of quartz is introduced which integrates injection of single cells, trapping...
PublikationenRaman Scattering and Third-Harmonic Generation in Silicon Nanowire Ensembles
Experiments on Raman scattering and third-harmonic generation in silicon nanowire ensembles formed demonstrate one-order-of-magnitude rise of these signals in them in comparison with crystalline silicon,...
PublikationenSTXM and NanoSIMS investigations on EPS fractions before and after adsorption to goethite
Extracellular polymeric substances (EPS) are expected to be an important source for the formation of mineral-organic associations in soil. Since such formations affect the composition of mobile and immobile...
PublikationenEvidence of Tm impact in low-photodarkening Yb-doped fibers
In contrast to Yb/Al-doped fibers, the influence of very low Tm2O3 concentrations (≥ 0.1 mol-ppm) on photodarkening (PD) is clearly detectable in Yb/P-doped fibers that are known to show little degradation...
PublikationenDeactivation of Yb3+ ions due to photodarkening
We carefully examined the fluorescence properties of Yb-doped fibers before and after pump-induced photodarkening (PD) and found a significant reduction of Yb3+ fluorescence intensity and lifetime due...
PublikationenToward improving fine needle aspiration cytology by applying Raman microspectroscopy
Medical diagnosis of biopsies performed by fine needle aspiration has to be very reliable. Therefore, pathologists/cytologists need additional biochemical information on single cancer cells for an accurate...
PublikationenVibrational spectra and dispersion analysis of K2Ni(SeO4)2•6H2O Tutton salt single crystal doped with K2Ni(SO4)2•6H2O
Dispersion analysis of the polarized IR reflectance spectra of K2Ni(SeO4)2•6H2O doped with K2Ni(SO4)2•6H2O has been performed. Vibrational parameters like oscillator strength, attenuation constant...
PublikationenFabrication and characterization of a „continuous Fiber Bragg Grating fiber“ using Draw Tower Grating Technology
In this paper we present new technical developments for the fabrication of low reflective fiber Bragg grating (FBG) chains in “continuous FBG fiber” configuration. Such chains consist of several thousand...
PublikationenInscription of first order Fiber Bragg Gratings in sapphire fibers by 400 nm femtosecond laser pulses
Fiber Bragg gratings (FBG) are suitable for measurements in harsh environments, because they are inert to electromagnetic radiation, very small, robust and embeddable into different compound materials....
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