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Preparation and Characterization of Self Assembled Gold Nanoparticles on Amino Functionalized SiO2 Dielectric Core

Authors: M.E.khosroshahi , M.S.Nourbakhsh


Wet chemistry methods are used to prepare the SiO2/Au nanoshells. The purpose of this research was to synthesize gold coated SiO2 nanoshells for biomedical applications. Tunable nanoshells were prepared by using different colloidal concentrations. The nanoshells are characterized by FTIR, XRD, UV-Vis spectroscopy and atomic force microscopy (AFM). The FTIR results confirmed the functionalization of the surfaces of silica nanoparticles with NH2 terminal groups. A tunable absorption was observed between 470-600 nm with a maximum range of 530-560 nm. Based on the XRD results three main peaks of Au (111), (200) and (220) were identified. Also AFM results showed that the silica core diameter was about 100 nm and the thickness of gold shell about 10 nm.

Keywords: Gold nanoshells, Synthesis, UV-vis spectroscopy, XRD, AFM

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[1] S.R.Sershen, S.L. Westcott, J.L.West, N.J. Halas, "An opto-mechanical nanoshell-polymer composite," Appl. Phys. B,vol.73,no.4, pp.379-381 , 2001.
[2] S.J. Oldenburg, R.D. Averitt, S.L.Westcott , N.J.Halas. "Nanoengineering of optical resonances," Chem. Phys. Lett. , vol. 288, no.2, pp.243-247 1998.
[3] Y .Shinong, Y .Wang, T .Wen, J .Zhu, "A study on the optical absorption properties of dielectric-mediated gold nanoshells," Physica E., vol.33 no.1, pp.139-143, 2006.
[4] S. Westcott, S. Oldenburg, T. R. Lee, and N. J. Halas, "Construction of Simple Gold Nanoparticle Aggregates with Controlled Plasmon- Plasmon Interactions", Chem. Phys. Lett,., vol, 300 ,no.5, pp. 651-655, 1999.
[5] S. R. Sershen, S. L. Westcott ,N. J. Halas, "Temperature-sensitive polymer-nanoshell composites for photothermally modulated drug delivery " J. Biomed. Mater. Res, Part A. vol. 51, no.3 , pp.293-298.
[6] M. Giersig, L., T. Ung, P.Mulvaney , D. Su, Phys. Chem. 1997, 101, 1617.
[7] K. Okitsu, Y. Mizukoshi, H. Bandow , Y. Maeda, "Formation of noble metal particles by ultrasonic irradiation" Ultrasonics Sonochem, vol.3 , no. 3, pp.249- 251,1996.
[8] T. K. Sau, A. Pal, N. R. Jana, Z. L. Wang , T. Pal, "Size controlled synthesis of gold nanoparticles using photochemically prepared seed particles", J. Nanoparticle Res. vol. 3, vol.257-261. 2001,
[9] L.M.Liz-Marzan, M.A.Correa-Duarte, P. Mulvaney and N. A Kotov, " Core -shell nanoparticles and assemblies thereof" Hand Book of Surfaces and Interfaces of Materials , vol. 3, Ch. 5, pp. 189-237, 2001.
[10] T. Ung , L.M. Liz-Marzan, P. Mulvaney, "Controlled method for silica coating of silver colloids. Influence of coating on the rate of chemical reactions", Langmuir, vol.14, no.14, pp.3740-3748, 1998.
[11] W.Stober, A.Fink, E.Bohn, "Controlled growth of monodisperse silica spheres in the micron size range". J. Colloid Interface Sci., vol.26, no.1, pp.62-69,1968.
[12] J.Wiesner, A.Wokaun, H. Hoffmann , "Surface enhanced Raman spectroscopy (SERS) of surfactants adsorbed to colloidal particles", Progress in Colloid & Polymer Science,vol.76 ,pp. 271- 277 ,1988.
[13] H.C.Lu,I.S.Tsai , Y.H.Lin. "Development of near infrared responsive material based on silica encapsulated gold nanoparticles". Journal of Physics: Conference Series , 188 , (2009)
[14] A. Van Blaaderen, A. J.Vrij, "Synthesis and characterization of mono disperse colloidal organo-silica spheres". J. Colloid Interface Sci., vol. 156 ,no.1, pp.1-18,1993.
[15] A. Patra, E. Sominska, S. Ramesh, Y.Koltypin. "Sonochemical preparation and characterization of Eu203 and Tb203 doped in and coated on silica and alumina nanoparticles" , J. Phys. Chem.B, vol.103, no.17, pp. 3361-3365, 1999.