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Proceedings Paper

Substrate responsive colloidal system based on luminescent Tb(III) doped silica nanoparticles
Author(s): Asiya R. Mustafina; Olga D. Bochkova; Svetlana V. Fedorenko; Viktoriya V. Skripacheva; Lucia Ya. Zakharova; Marcil K. Kadirov; Irek R. Nizameyev; Alexander I. Konovalov; Svetlana E. Soloveva
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Paper Abstract

Positively charged luminescent silica nanoparticles loaded with Tb(III) complex were prepaired by reverse microemulsion procedure with further modification by gemini surfactant. The ξ-potential values and dynamic light scattering data indicate high positive charge and colloidal stability of the as prepaired nanoparticles. The high affinity of these nanoparticles to anions is verified by spectrophotometric measurements with dye molecules, namely phenol red. The insertion of phenol red anions into surfactant bilayer at silica/water interface results in the quenching effect on Tb(III)-centered luminescence of the nanoparticles. Thus "on-off" switching of Tb-centered luminescence indicates the formation of the positively charged bilayer at the silica/water interface. The binding of dodecylsulfate anions with cationic adlayer at the silica/water interface results in the recharging of silica nanoparticles. This recharging can be manifested through the "off-on" luminescent switching, resulted from the displacement of dye anions and reestablishment of Tb(III)-centered luminescence.

Paper Details

Date Published: 7 February 2011
PDF: 10 pages
Proc. SPIE 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies, 79941B (7 February 2011); doi: 10.1117/12.881335
Show Author Affiliations
Asiya R. Mustafina, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Olga D. Bochkova, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Svetlana V. Fedorenko, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Viktoriya V. Skripacheva, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Lucia Ya. Zakharova, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Marcil K. Kadirov, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Irek R. Nizameyev, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Alexander I. Konovalov, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)
Svetlana E. Soloveva, A.E. Arbuzov Institute of Organic and Physical Chemistry (Russian Federation)


Published in SPIE Proceedings Vol. 7994:
LAT 2010: International Conference on Lasers, Applications, and Technologies
Vladislav Panchenko; Gérard Mourou; Aleksei M. Zheltikov, Editor(s)

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