Thermal effects on the surface plasmon resonance of Cu nanoparticles in phosphate glass: impact on Cu⁺ luminescence.

ABSTRACT: An evaluation of the effects of temperature on the optical properties of phosphate glass containing Cu nanoparticles (NPs) and Cu⁺ ions was carried out by means of optical absorption and photoluminescence (PL) spectroscopy measurements performed jointly in situ in the 298 to 573 K range. The surface plasmon resonance (SPR) of Cu NPs displayed a strong dampening effect with temperature, consistent with the thermal expansion of Cu NPs and an increase in the electron-phonon scattering rate. The PL of Cu⁺ ions in the glass with Cu NPs showed the thermal quenching effect connected with an increase in non-radiative relaxation processes. Moreover, a comparison with the precursor glass without NPs revealed that a lower activation energy for the thermal quenching of Cu<

SUBMITTER: Jimenez JA 

PROVIDER: S-EPMC9418556 | biostudies-literature | 2019 May

REPOSITORIES: biostudies-literature