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

Journal of Optoelectronical Nanostructures

مقاله 7، دوره 1، شماره 3، آذر و دی 2016، صفحه 67-76   

نوع مقاله: Articles

نویسندگان

Seyyedeh Zahra Hosseini Minabi^{* 1}؛ Alireza Keshavarz²؛ Abdolrasoul Gharaati¹

¹Department of Physics, Payame Noor University, Tehran, Iran

²Department of Physics, Shiraz University of Technology, Shiraz, Iran

تاریخ دریافت: 22 شهریور 1395،  تاریخ بازنگری: 29 مهر 1395،  تاریخ پذیرش: 28 آبان 1395 

چکیده

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.

کلیدواژه‌ها

Nanoparticles؛ Optical Absorption Cross Section؛ temperature

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