DEVELOPMENT OF A METHOD FOR THE SYNTHESIS OF PLASMONIC GOLD NANOPARTICLES FOR A WIDE SPECTRAL REGION 520-720 nm

A method of the synthesis of plasmon gold nanoparticles by the reduction of HAuCl4 with organic reductants, such as formalin, sodium citrate and hydroquinone has been studied. It is shown that, depending on the concentration of the reagents, the temperature of synthesis and the type of the reducing agent, the position of the maximum of the plasmon band varies in a wide range from 520 nm to 720 nm. A one-stage method using hydroquinone as a reducing agent for the synthesis of long-wave plasmonic gold nanoparticles that form agglomerates of smaller particles with a plasmon absorption band in the red region of the spectrum is proposed. Since the resulting sol is rapidly precipitated due to the aggregation processes, it has been found necessary to use stabilizers for its subsequent application. The influence of some stabilizers (gelatin, as well as surface-active substances polydimethyldiallylammonium chloride and cetyltrimethylammonium bromid) on the stability of the gold sol synthesized by the hydroquinone method has been studied. It is shown that all the types of investigated stabilizers even in a minimal quantity provide the colloidal stability of the sol for several hours. However, only a natural polymer, gelatin, stabilizes the sol so that the maximum absorption of the plasmon band remains in the long-wavelength region of the spectrum.

nanoparticles, gold nanoparticles, plasmon nanoparticles, synthesis of plasmon nanoparticles, stabilization of gold sols, stabilizers

1. Shah M., Badwaik V., Kherde Y., Waghwani H.K., Modi T., Aguilar Z.P., Rodgers H., Hamilton W., Marutharaj T., Webb C., Lawrenz M.B., Dakshinamurthy R. Gold nanoparticles: Various methods of synthesis and antibacterial applications // Frontiers in Bioscience. 2014. № 19. P. 1320–1344.

2. Aherne D., Ledwith D.M., Gara M., Kelly J.M. Optical properties and growth aspects of silver nanoprisms produced by a highly reproducible and rapid synthesis at room temperature // Adv. Funct. Mater. 2008. № 18. P. 2005–2016.

3. Millstone J.E., Hurst S.J., Metraux G.S., Cutler J.I., Mirkin C.A. Colloidal gold and silver triangular nanoprisms // Small. 2009. № 5. P. 646–664.

4. Sun Y.G. Metal nanoplates on semiconductor substrates // Adv. Funct. Mater. 2010. № 20. P. 3646–3657.

5. Bastys V., Pastoriza-Santos I., RodríguezGonzález B., Vaisnoras R., Liz-Marzán L.M. Formation of silver nanoprisms with surface plasmons at communication wavelengths // Adv. Funct. Mater. 2006. № 16. P. 766–773.

6. http://www.samsung.com/global/tv/ (Date of access: 15.03.2017)

7. Ershov B.G. Metal nanoparticles in aqueous solutions: electronic, optical and catalytic properties //Rossiyskiy khimicheskiy zhurnal (Russian Chemical Journal) 2001. V. XLV. № 3. P. 20–30. (in Russ.)

8. Gao C., Goebl J., Yin Y. Seeded growth route to noble metal nanostructures // J. Mater. Chem. C. 2013. V. 1. P. 3898–3909.

9. Silva J. N., Saade J., Farias P. M. A., Falcão E. H. L. Colloidal synthesis of silver nanoprisms in aqueous medium: Influence of chemical compounds in UV/Vis absorption spectra // Advances in Nanoparticles. 2013. № 2. P. 217-222.

10. Zhang C., Sun L-D., Yan C-H. Noble metal plasmonic nanostructure related chromisms // Inorg. Chem. Front., 2016. № 3. P. 203–217.

11. Ye X.C., Jin L.H., Caglayan H., Chen J., Xing G.Z., Zheng C., Doan-Nguyen V., Kang Y.J., Engheta N., Kagan C.R., Murray C.B. Design of an ultra-sensitive gold nanorod colorimetric sensor and its application based on formaldehyde reducing Ag+ // ACS Nano. 2012. № 6. P. 2804–2817.

12. Ye X.C., Gao Y.Z., Chen J., Reifsnyder D.C., Zheng C., Murray C.B. Seeded growth of monodisperse gold nanorods using bromide-free surfactant mixtures // Nano Lett. 2013. № 13. P. 2163–2171.

13. Ye X.C., Zheng C., Chen J., Gao Y.Z., Murray C.B. Using binary surfactant mixtures to simultaneously improve the dimensional tunability and monodispersity in the seeded growth of gold nanorods // Nano Lett. 2013. № 13. P. 765–771.

14. Bychkovskiy P.M., Kladiev А.А., Solomevich S.О., Schegolev S.Yu. Gold nanoparticles: Synthesis, properties, biomedical application // Rossiyskiy bioterapevticheskiy zhurnal (Russian Biotherapeutic Journal). 2011. № 3. V. 10. P. 37–46. (in Russ.)