The effect of temperature on optical absorption cross section of bimetallic core-shell nano particles

Subject Areas : Journal of Optoelectronical Nanostructures

Seyyedeh Zahra Hosseini Minabi ¹ , Alireza Keshavarz ² , Abdolrasoul Gharaati ³

1 - Department of Physics, Payame Noor University, Tehran, Iran
2 - Department of Physics, Shiraz University of Technology, Shiraz, Iran
3 - Department of Physics, Payame Noor University, Tehran, Iran

Received: 2016-11-20 Accepted : 2017-06-10 Published : 2016-12-15

Keywords: temperature, Nanoparticles, Optical Absorption Cross Section,

Abstract :

In this paper, the temperature dependence on optical absorption cross section of the core shell bimetallic nanoparticles (NPs) is investigated in quasi static approximation. Temperature dependence of the plasmon resonance is important issue because of recent applications of NPs of noble metal for heat treating of cancer and the computer chips. The effect of temperature on surface plasmon resonance and spectral properties of spherical core-shell NPs are studied by using the Drude Lorentz model. As temperatures increases, the spectrum can be expanded, and thus it causes to expand plasmon resonance absorption and a weak red shift in core-shell NPs. In addition, the temperature dependent absorption cross section of the material depends on the type, structure and geometry of the NPs. The high sensitivity of surface plasmon resonance peaks causes that core shell NPs be completely suitable for medical and optical biosensor applications.

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