The effect of temperature on optical absorption cross section of bimetallic core-shell nano particles
محورهای موضوعی : فصلنامه نانوساختارهای اپتوالکترونیکیSeyyedeh 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
کلید واژه: temperature, Nanoparticles, Optical Absorption Cross Section,
چکیده مقاله :
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.
[1] U. Kreibig, and M. Vollmer. Optical properties of metal clusters. Vol. 25. Springer Science & Business Media, 2013.
[2] L. Hirsch, R.J. Stafford, J.A. Bankson, S.R. Sershen, B. Rivera, R.E. Price, J.D. Hazle, N.J. Halas, and J.L West. Nanoshell-mediated near-infrared thermal therapy of tumors under magnetic resonance guidance. Proceedings of the National Academy of Sciences, 100 (2003) 13549-54.
[3] W.A. Challener, C. Peng, A.V. Itagi, D. Karns, W. Peng, Y. Peng, X. Yang, X. Zhu, N.J. Gokemeijer, Y.T. Hsia, and G. Ju, Heat-assisted magnetic recording by a near-field transducer with efficient optical energy transfer. Nature photonics, 3(4) (2009) 220-224.
[4] H.P. Chiang, P.T. Leung, and W.S. Tse, Optical properties of composite materials at high temperatures. Solid state communications, 101(1) (1997) 45-50.
[5] S. Link, and MA. El-Sayed, Size and temperature dependence of the plasmon absorption of colloidal gold nano particles. The Journal of Physical Chemistry B, 103(21) (1999) 4212-4219.
[6] H.Y. Chung, H.Y. Xie, P.T. Leung, D.P. Tsai, Optical properties of metallic nanoshell composites: The effects of temperature and particle clustering. Solid State Communications, 149(47) (2009) 2151-2156.
[7] O.A, Yeshchenko, I.M, Dmitruk, A.A. Alexeenko, A.V. Kotko, J. Verdal, A.O. Pinchuk, Size and temperature effects on the surface plasmon resonance in silver nano particles. Plasmonics. 7(1) (2012) 685-694.
[8] J. Zhu, Theoretical study of the optical absorption properties of Au–Ag bimetallic nanospheres. Physica E: Low-dimensional Systems and Nanostructures, 27(1) (2005) 296-301.
[9] R.D. Averitt, S.L. Westcott, and N.J.Halas, Linear optical properties of gold nanoshells. JOSA B, 16(10) (1999) 1824-1832.
[10] C.F. Bohren, and D.R. Huffman. Absorption and Scattering of light by small particles. John Wiley & Sons, 2008.
[11] N. Daneshfar, Temperature dependence of the optical characteristics and surface plasmon resonance of core-shell nano particles. Physics of Plasmas, 21(6) (2014) 063301.
