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

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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.

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

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Publication details

The article was received on 10 Dec 2018, accepted on 12 Mar 2019 and first published on 18 Mar 2019


Article type: Paper
DOI: 10.1039/C8NA00385H
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    Thermal effects on the surface plasmon resonance of Cu nanoparticles in phosphate glass: impact on Cu+ luminescence

    J. A. Jiménez, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00385H

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