P 42 ISSRNS 2012: Abstracts / Synchrotron Radiation in Natural Science Vol. 11, No 1 – 2 (2012)
THE STRUCTURE AND MORPHOLOGY OF GOLD NANOPARTICLES PRODUCED IN CATIONIC GEMINI SURFACTANTS SYSTEMS
M. Murawska1, M. Wiatr1, P. Nowakowski1, K. Szutkowski1, A. Skrzypczak2, and M. Kozak1∗
1Department of Macromolecular Physics, A. Mickiewicz University, Umultowska 85, 61-614 Pozna´n, Poland
2Faculty of Chemical Technology, Pozna´n University of Technology, Piotrowo 3, 60-965 Pozna´n, Poland
Keywords: Au nanoparticles, gemini surfactants
∗e-mail : mkozak@amu.edu.pl
Gold nanoparticles have a great number of ap- plications, among others in material science, bi- ology and medicine (for example as components of the specific drug delivery systems or accurate and less expensive nanosensors for diagnostic pur- poses) [1, 2].
A method for the synthesis of gold nanoparticles in solution with the use of gemini surfactant was proposed and the nanoparticles obtained were sub- jected to thorough characterization. The method proposed is a modification of that proposed by Turkevich [3], based on reduction of tetrachloroau- ric acid in the presence of trisodium citrate and a dicationic (gemini) surfactants - alkyloxymethylim- idazolium derivatives.
Morphology and size distribution of gold nanoparticles obtained were examined using trans- mission electron microscopy (TEM), small angle scattering of synchrotron radiation (beam line BLi9- 11-4 [4], MAXII storage ring of the MAX-Lab Lund, Sweden, λ = 0.091 nm) and NMR diffu- sion spectroscopy. For the nanoparticles solution obtained we observed the plasmon resonance at the wavelength corresponding to the presence of gold nanoparticles with sizes ranging from 5 – 100 nm.
TEM images show the presence of gold nanopar- ticles with tetrahedral and spherical morphology
in solutions with surfactants GC12P, GC12N, and spherical morphology, but strongly aggregated in so- lution with cationic surfactant GOC12Cl (Fig. 1).
Acknowledgments: The present study was carried out with financial support from the Ministry of Science and Higher Education (grant nr N N202 127237).
References
[1] M.S. Bakshi, P. Sharma, T.S. Banipal, “Au and Au-Ag bimetallic nanoparticles synthesized by us- ing 12-3-12 cationic Gemini surfactant as template,”
Mater. Lett. 61 (2007) 5004 – 5009.
[2] J. Polte, T.T. Ahner, F. Delissen, S. Sokolov, F.
Emmerling, A.F. Thunemann, “Mechanism of gold nanoparticle formation in the classical citrate syn- thesis method derived from coupled in situ XANES and SAXS evaluation,” R. J. Am. Chem. Soc. 132 (2010) 1296 – 3001.
[3] J. Turkevich, P.C. Stevenson, J. Hillier, “A study of the nucleation and growth processes in the synthesis of colloidal gold” Discuss. Faraday Soc. 11 (1951) 55 – 75.
[4] C.B. Mammen, T. Ursby, Y Cerenius, M.
Thunnissen, J. Als-Nielsen, S. Larsen, A. Liljas,
“Design of a 5-station macromolecular crystallogra- phy beamline at MAX-lab,” Acta Phys. Pol. A 101 (2002) 595 – 602.
Figure 1 : TEM images of gold nanoparticles obtained with the addition of surfactant (from left: GC12P, GC12N, GOC12Cl).
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