Effect of disperse red dye on spectral red-shift of green-emitting luminous fibre

Green-emitting rare earth luminous fibre has been dyed with disperse red fluorescent dyestuff and ordinary disperse red dyestuff respectively, and the effects of disperse red dyestuffs on the spectral red-shift of green-emitting rare earth luminous fibre are studied by testing the luminescent properties. The emission spectra of green-emitting luminous fibre dyed with Red 3B, Red SE-GFL and Red S-2GFL show that the emission peak of fibre moves towards 620 nm from 520 nm after being dyed with Red 3B, and the spectrum has the strongest emission intensity when the concentration of Red 3B dye is 1.0% (o.w.f). The result of colorimetric analysis shows that the luminous fibre dyed with Red 3B dye at different concentrations has similar color purities, and the emission color of fibre is found closest to red color for the dyestuffs concentration of 1.0% (o.w.f). The analysis of energy transfer model of the dyed luminous fibre indicates that the light emitted by the SrAl2O4:Eu2+, Dy3+ phosphor could be used as a light source to excite the Red 3B dye, and the color of dyed luminous fibre is due to the blended luminescence color of the SrAl2O4: Eu2+, Dy3+ phosphor and Red 3B dye

Comment on "Atomic Scale Structure and Chemical Composition across Order-Disorder Interfaces"

Interfaces have long been known to be the key to many mechanical and electric properties. To nickel base superalloys which have perfect creep and fatigue properties and have been widely used as materials of turbine blades, interfaces determine the strengthening capacities in high temperature. By means of high resolution scanning transmission electron microscopy (HRSTEM) and 3D atom probe (3DAP) tomography, Srinivasan et al. proposed a new point that in nickel base superalloys there exist two different interfacial widths across the {\gamma}/{\gamma}' interface, one corresponding to an order-disorder transition, and the other to the composition transition. We argue about this conclusion in this comment

Domain Wall Network: A Dual Solution for Gravitational Waves and Hubble Tension?

We search for stochastic gravitational wave background (SGWB) generated by domain wall networks in the Data Release-2 of Parkes Pulsar Timing Array and find that the observed strong common power-law process can be explained by domain wall networks for the wall tension $\sigma_{\textrm{DW}}\sim (29-414~\textrm{TeV})^3$ and the wall-decay temperature $T_d\sim 20-257~\textrm{MeV}$ at $68\%$ Credible Level. Interestingly, the same parameter region can largely alleviate the Hubble tension, if the free particles generated from domain wall networks further decay into dark radiation. This coincidence that a domain wall network can simultaneously account for the nano-Hertz SGWB and Hubble tension is robust, independent of domain wall parameters and applicable to observations by other pulsar timing array collaborations in general. On the other hand, assuming that the common power-law process is not due to domain wall networks, we can put stringent constraints on the wall tension and decay temperature.Comment: 14 pages, 9 figures, 4 table