Silver based nanomaterials - fluorescence enhancement in silver doped silica based nanobiomaterials

• Autorzy: Wysocka K. , Bindig U. , Bauer J. , Stręk W. , Kowal K. , Podbielska H.
• Języki publikacji: EN

Abstrakty

EN

The sol-gel derived silica spheres with surfaces modified by silver nanoparticles were used to enhance the emission efficiency of PDTphotosensitizer Photolon. Two various materials with different Ag concentrations were prepared by exploiting the Tollen's method. The silica nanoparticles were prepared by modified Stöber synthesis. The diameter of obtained silica spheres was ca. 100nm. These silica spheres we used as a carrier for noble nanoparticles, since they can be easily doped by various substances that can change their physical and chemical properties. The colloidal water solutions of Ag-doped SiO2 particles have been prepared. It was demonstrated that the fluorescence intensity of Photolon is influenced by silver nanoparticles concentration, however it is not proportional to the silver concentration. The fluorescence intensity of Photolon with silver doped silica nanoparticles is much higher then fluorescence intensity of Photolon in water solution. This result is very promising and may be used to enhance the photodynamic effect.

Słowa kluczowe

EN

silver; nanomaterials; nanobiomaterials

• Wydawca: Polish Society for Biomaterials in Cracow
• Czasopismo: Engineering of Biomaterials
• Rocznik: 2008
• Tom: Vol. 11, no. 81-84
• Strony: 124--125
• Opis fizyczny: Bibliogr. 8 poz., tab., wykr.

Twórcy

autor

Wysocka K.

• Wrocław Uiwersity of Technology, Institute of Biomedical Engineering and Instrumentation, Bio-Optics Group, 27 Wybrzeże Wyspiańskiegoo, 50-370 Wrocław, Poland

autor

Bindig U.

• Laser-und Medizin-Technologie GmbH, Berlin, 60-62 Fabeckstr., 14195 Berlin, Germany

autor

Bauer J.

• Wrocław Uiwersity of Technology, Institute of Biomedical Engineering and Instrumentation, Bio-Optics Group, 27 Wybrzeże Wyspiańskiegoo, 50-370 Wrocław, Poland

autor

Stręk W.

• Polish Academy of Sciences, Institute of Low Temperature and Structure Research, 2 Okólna str., 50-422 Wrocław, Poland

autor

Kowal K.

• Wrocław Uiwersity of Technology, Institute of Biomedical Engineering and Instrumentation, Bio-Optics Group, 27 Wybrzeże Wyspiańskiegoo, 50-370 Wrocław, Poland

autor

Podbielska H.

• Wrocław Uiwersity of Technology, Institute of Biomedical Engineering and Instrumentation, Bio-Optics Group, 27 Wybrzeże Wyspiańskiegoo, 50-370 Wrocław, Poland

Bibliografia

• [1] Kawashita M., Toda S., Kim H.-M., Kokubo T., Masuda N., Preparation of Antibacterial Silver-Doped Silica Glass Microspheres, Journal of Biomedical Materials Research 66, 2003, pp. 266-274.
• [2] Stöber W., Fink A., Bohn E., Controlled growth of monodisperse silica spheres in the micron size range, Journal of Colloid and Interface Science 26, 1968, pp. 62-69.
• [3] Peterson M.S.M., Bouwman J., Chen A., Deutsch M., Inorganic metallodielectric materials fabricated using two single-step methods based on the Tollen's process, Journal of Colloid and Interface Science 306, 2007, s. 41-49.
• [4] Kerker M., Blatchford C.G., Elastic scattering, absorption, and surface-enhanced Raman scattering by concentric spheres comprised of a metallic and a dielectric region, Physical Review B 26, 1982, pp. 4052-4063.
• [5] Malicka, J., Gryczynski I., Gryczynski Z., Lakowicz J.R., Effects of Fluorophore-to-silver Distance on the Emission of Cyanine-dye-labeled Oligonucleotides, Analitical Biochemistry 315, 2003, pp. 57-66.
• [6] Messinger B.I., von Raben K.U., Chang R.K., Barber P. W., Local fields at the surface of noble-metal microspheres, Physical Review B 24, 1981, pp. 649-657.
• [7] Lakowicz J.R., Radiative Decay Engineering 5: Metal-Enhanced Fluorescence and Plasmon Emission, Anal. Biochem. 337, 2005, pp.171.
• [8] Evanoff D.D., Jr.; White R.L., Chumanov G.J., Measuring the Distance Dependence of the Local Electromagnetic Field from Silver Nanoparticles, Journal of Physical Chemistry B 108, 2004, pp. 1522-1524.

Uwagi

The authors thank dr Jerzy Kowalczyk from Polish Academy of Sciences in Wrocław for his technical and support. The work was supported by the Polish Ministry of Education and Scientific Research, Grant No. N N518 327335.