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

Research output: Contribution to journalArticle

5 Scopus citations

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+ PL results in the presence of Cu NPs for Cu+ sites emitting in resonance with the SPR. It is suggested that the increase in electron-phonon interaction in Cu NPs with temperature impacts the PL quenching of Cu+ ions the most. The current results suggest that a Cu+ → Cu NP resonant energy transfer supports a deactivation of the Cu+ emitting states with increasing temperature.

Original languageEnglish (US)
Pages (from-to)1826-1832
Number of pages7
JournalNanoscale Advances
Volume1
Issue number5
DOIs
StatePublished - Jan 1 2019
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Chemistry(all)

Fingerprint Dive into the research topics of 'Thermal effects on the surface plasmon resonance of Cu nanoparticles in phosphate glass: Impact on Cu<sup>+</sup> luminescence'. Together they form a unique fingerprint.

  • Cite this