Temperature dependence of the surface plasmon resonance in gold nanoparticles

• Published in: Surface science Vol. 608; pp. 275 - 281
• Main Authors: Yeshchenko, O.A., Bondarchuk, I.S., Gurin, V.S., Dmitruk, I.M., Kotko, A.V.
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 01-02-2013; Elsevier
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Doppler effect; Exact sciences and technology; Gold; Gold nanoparticles; Nanoparticles; Physics; Plasmons; Red shift; Scattering; Surface plasmon resonance; Temperature dependence; Temperature induced effects; Thermal expansion; Temperature induced effects; Gold nanoparticles; Surface plasmon resonance; Nanoparticles; Temperature dependence; Gold; Temperature effects; Transition elements; Surface plasmons
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/j.susc.2012.10.019

The temperature dependences of energy and width of the surface plasmon resonance were studied for gold nanoparticles with sizes 20–55nm in silica host matrix in the temperature range 17–915°С. The increase of temperature leads to appreciable red shift and broadening of the surface plasmon resonance in Au nanoparticles. The obtained dependences were analyzed within the framework of theoretical model considering the thermal expansion of the nanoparticle, the electron–phonon scattering in the nanoparticle and the temperature dependence of dielectric permittivity of the host matrix. The thermal expansion was shown to be the main mechanism responsible for the temperature induced red shift of the surface plasmon resonance in gold nanoparticles. The thermal volume expansion coefficient for Au nanoparticles was found to be size-independent in the studied size range. Meanwhile, the increase of electron–phonon scattering rate with increasing temperature was shown to be the dominant mechanism of the surface plasmon resonance broadening in the gold nanoparticles.
► Temperature dependence of SP resonance was studied for Au nanoparticles at 17–915°С. ► Increase of temperature leads to red shift and broadening of SP resonance. ► Thermal expansion is the main mechanism of red shift. ► Increase of electron–phonon scattering rate is the main mechanism of broadening.