Compared with traditional organic dyes, semiconductor quantum dots (QDs) have exceptional intrinsic properties including high photoluminescence quantum yield, narrow fluorescence emission, long fluorescence lifetime, large effective Stokes shifts, and tunable excitation wavelength, making them very appealing for various biological applications [3 5].
According to Takahashi et. al [23], the increased nitrogen concentration, as in samples 1 to 3, merely increases the band bowing and reduces the dipole interaction by involving more non-Γ states, which has a direct effect on the radiative lifetime when larger N concentrations are used.
Smaller stars have longer lifetimes than larger stars.
One fall off a bicycle, though, can do more damage in an instant than a lifetime of large sodas (which, by the way, would still be available through loopholes in his proposal, allowing them, for example, to be sold at convenience stores).
Long emission lifetime and large conjugation plane were proved positive to improve sensing performance.
Their lifetime and large equilibrium mass and hence radioactivity accumulated in the course of fission energy generation make their storage a rather formidable task to solve.
During its rather long lifetime, a large fraction of the energy output has been in the form of multi-TeV electrons.
After final drying, the intensities I 2 practically completely return to the initial values (character for initially dried samples), whereas τ 2 lifetimes are larger in ceramics sintered at 1300 and 1400 °C.
Most surveillance applications in wireless sensor network (WSN) have stringent accuracy requirements in targets surveillance with maximized system lifetime, while large amount of continuous sensing data and limited resource in WSNs pose great challenges.
This paper describes a proposal to solve this problem by developing a sequential local extrapolation based calculation reduction method of internal variables to accelerate the calculation of deformation and lifetime of large components.
