To maximize the effect of the sudden radiative heat exposure, subjects were wearing only cycling shorts and shoes and there was no airflow over the body.
For this purpose, a test in the constant vacuum was performed reproducing a three year radiative space environment exposure, including ultraviolet and charged particle effects on North/South panels of a geostationary three-axis stabilized spacecraft.
The contribution of these non-radiative components grew on exposure to air for both the treated and untreated samples.
According to ab initio many-body calculations[ 36] the dielectric constant for cadmium oxide (CdO) has this value, which, coupled with the increasing contribution of non-radiative recombination for greater exposure to air noted above, indicates that oxidation of the CQD surface plays a key role in producing the nanosecond time scale non-radiative recombination observed.
This decline most probably reflects a decreased flow of electrons in the radiative recombination pathway with time of exposure to excess light.
This suggests that oxidation not only produces traps, as evidenced by the increasing non-radiative contribution to the decay transient on exposure to air, but also determines the time scale of non-radiative recombination.
The relative contributions of the fast and slow non-radiative components, and their evolution upon exposure to air, detailed in Sections 2.2 and 2.3, reflect the effect on the distribution of trapping times of the different ligands and chloride ions on both the passivation of dangling bonds and on the local dielectric environment.
Our study demonstrates a reversible, drastic decrease of PSII radiative charge recombination that is triggered by exposure of Microcoleus to light intensities exceeding saturation of oxygen evolution, thus conferring protection against light-induced oxidative stress.
Before chloride passivation or after exposure to air, two non-radiative components are also observed in the recombination transients, with sample-dependent lifetimes typically of less than 1 ns and a few ns.
This indicates that the radiative and nonradiative recombination rate changed and that the exposure to humidity resulted in the reduction of the nonradiative recombination channels.
