Substrate responsive colloidal system based on luminescent Tb(III) doped silica nanoparticles

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

doi:10.1117/12.881335

7 February 2011 Substrate responsive colloidal system based on luminescent Tb(III) doped silica nanoparticles

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

Author Affiliations +

Proceedings Volume 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies; 79941B (2011) https://doi.org/10.1117/12.881335
Event: International Conference on Coherent and Nonlinear Optics (ICONO 2010) and International Conference on Lasers, Applications and Technologies (LAT 2010), 2010, Kazan, Russian Federation

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.

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Asiya R. Mustafina, Olga D. Bochkova, Svetlana V. Fedorenko, Viktoriya V. Skripacheva, Lucia Ya. Zakharova, Marcil K. Kadirov, Irek R. Nizameyev, Alexander I. Konovalov, and Svetlana E. Soloveva "Substrate responsive colloidal system based on luminescent Tb(III) doped silica nanoparticles", Proc. SPIE 7994, LAT 2010: International Conference on Lasers, Applications, and Technologies, 79941B (7 February 2011); https://doi.org/10.1117/12.881335

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KEYWORDS

Nanoparticles

Silica

Gemini Observatory

Luminescence

Interfaces

Molecules

Switching

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