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Application of silica-metal core-shell nanostructures for Surface Enhanced Raman Spectroscopy 

Dominik Jamioła 1Bartosz Bartosewicz 2Bartłomiej J. Jankiewicz 2Piotr Nyga 2

1. Military University of Technology, Faculty of Advanced Technology and Chemistry, Kaliskiego 2, Warszawa 00-908, Poland
2. Military University of Technology, Institute of Optoelectronics, Warszawa, Poland


Studies of the silica–noble metal core-shell particles are fascinating mainly because of their unique structures and interesting physicochemical properties, which make them attractive for a variety of applications [1,2]. These structures are of great interest in biological and biochemical studies, for instance, in cancer diagnostics or pathogens identification, spectroscopy, e.g., surface-enhanced Raman spectroscopy (SERS), optical signal modulation and photonics.

In this paper we report an effective recipe for preparation of core-shell nanostructures consisting of spherical siliceous cores with diameter ca. 500 nm and gold or silver external shell layer (Fig. 1). We found the optimal process conditions to obtain products with desired size and morphology. Optical properties (extinction) of obtained silica-gold and silica-silver nanostructures were examined in wavelength range from 200 to 800 nm. SERS activity of prepared nanostructures was tested using standard compound – p-mercaptoaniline and revealed enhancement of the order of 106.

 Fig. 1. Siliceous cores of nanostructures (a), silica-gold nanostructures (b) and silica-         silver nanostructures (c)

[1] B.J. Jankiewicz, D. Jamiola, J. Choma, M. Jaroniec, Silica-metal core-shell nanostructures, Adv. Colloid Interface Sci., 2012, 170(1-2), pp. 28-47

[2] B. Bartosewicz, M. Gajda-Rączka, B.J. Jankiewicz, Chemical approach to fabrication of semicontinuous Au nanolayers for SERS applications, Photonics Letters of Poland, 2013, 5, pp. 48-50


This research was partially supported by the grant no. DEC-2011/03/N/ST5/04444 funded by the National Science Centre and the grant no. OR00005408 (2009–2011) funded by the Polish Ministry of Science and Higher Education.


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Presentation: Poster at Nano and Advanced Materials Workshop and Fair, by Dominik Jamioła
See On-line Journal of Nano and Advanced Materials Workshop and Fair

Submitted: 2013-07-25 11:39
Revised:   2013-07-25 11:40