نتایج جستجو برای: luminescence effect
تعداد نتایج: 1652877 فیلتر نتایج به سال:
photoproteins are excellent reporter systems because they don’t have virtually background signal. aequorin is the most well-known photoprotein. three improved engineered photoproteins photina, i-photina and c-photina, were also recently developed and optimized for generation of ca2+ mobilization assays precisely. the total light emission is greater than aequorin and their reaction kinetics is a...
Magnetically stabilized luminescence is observed in hexagonal boron nitride. The luminescence is induced by absorption of cold neutrons and is in the visible region. In the absence of a magnetic field, the photon emission level is observed to decay over several hundred seconds. A fraction of this luminescence can be suppressed if the temperature is T . 0.6 K and the magnetic field is B & 1.0 T....
Strong broad photoluminescence similar to that observed in some materials grown by molecular beam epitaxy (MBE) has been observed in Si/Si, -,Ge,/Si quantum wells grown by chemical vapor deposition. As grown, the samples exhibited SiGe band-edge phonon-resolved bound-exciton luminescence, but after being self-implanted with silicon and annealed at 600 “C, a deep broad luminescence band 80-100 m...
In this work, a near-infrared CCD-based singlet oxygen luminescence two-dimensional imaging method is proposed to detect singlet oxygen by its 1270nm luminescence. Two-dimensional singlet oxygen images with its near-infrared luminescence during photosensitization could be obtained with a CCD integration time of 1s, without scanning. The data presented shows a linear relationship between the sin...
For identification and differentiation of different types of dolomites of the Padeha Formation, three stratigraphic sections in the northern and southern Tabas Block, with the maximum amount of dolomite, were selected and sampled. Based on petrographic evidence and geochemical data, three types of dolomite were identified, including primary (PD), replacement (RD) and vein and pore filling (VD) ...
We report the synthesis of silver nanoparticles with grain sizes down to electron Fermi wavelength. These nanoparticles exhibit bright luminescence and large Raman enhancement effect. The number of photons emitted from these nanoparticles exceeded that from quantum dots or dye molecules by approximately 2 or 5 orders of magnitude, respectively.
The pH sensor exploits the phenomenon of upconversion luminescence and is based on a hydrogel matrix containing (a) nanorods of the NaYF(4):Er,Yb type that can be excited with 980-nm laser light to give a green and red (dual) emission, and (b) a longwave absorbing pH probe that causes a pH-dependent inner filter effect.
The excited state dynamics of 1,3,5-trithia-2,4,6-triazapentalenyl TTTA was investigated by using femtosecond luminescence spectroscopy. The luminescence was measured in low and high temperature phases of TTTA between 1.42 and 1.2 eV. Only in the low temperature phase, we observed a broad luminescence band with a decay time constant of 1.6 ps in all energy range. This decay time constant sugges...
The laser-induced luminescence studies of the rare earth titanates (R2Ti2O7) (R=La, Nd and Gd) using 355 nm radiation from an Nd:YAG laser are presented. These samples with submicron or nanometer size are prepared by the self-propagating high temperature synthesis (SHS) method and there is no known fluorescence shown by these rare earths in the visible region. Hence, the luminescence transition...
An Eu(III)-containing polymer can exhibit intense induced circularly polarized luminescence (CPL) in the presence of proline. In addition, the optical anisotropy factor (g(lum)) of the polymer for (5)D0 → (7)F1/(7)F2 transition was much higher than that of a single model molecule, which reveals the amplification effect of CPL arising from the conjugated polymer structure.
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید