O.V. Ovchinnikov - Dr.Sci. (Phys.-Math.), Associate Professor, Voronezh State University. Е- mail: ovchinnikov_o_v@rambler.ru M.S. Smirnov - Ph.D. (Phys.-Math.), Associate Professor, Voronezh State University. Е- mail: smirnov_m_s@mail.ru I.G. Grevtseva - Research Scientist, Voronezh State University. Е-mail: grevtseva_ig@inbox.ru T.S. Kondratenko - Ph.D. (Phys.-Math.), Voronezh State University. Е- mail: tamara-shatskikh@rambler.ru A.S. Perepelitsa - Research Scientist, Voronezh State University. Е- mail: a-perepelitsa@yandex.ru A.V. Evtuhova - Research Scientist, Voronezh State University. Е- mail: chemists-ann@mail.ru

The methods of hybrid nanostructures preparation constructed from colloidal quantum dots Ag2S with an average size of 2...3 nm and molecules J - aggregates dyes of different classes are discussed. Amplification and interlocking of IR-luminescence of Ag2S colloidal quantum dots when pairing them with molecules of organic dyes pyridinium salt 3,3\'-di-(γ-sulfopropyl)-9-ethyl-4,5,4\',5\'?dibenzotia-carbozianin-betaine, erythrosine, methylene blue and thionine are observed. The observed effects are explained by the organic-inorganic heterostructure formation with different mutual arrangement of electronic states of dyes and quantum dots. A possibility of singlet oxygen photosensibilization is also found when pairing Ag2S quantum dots and molecules of methylene blue and thionine. It is shown, that dyes manifest themselves as sensibilizers and desensibilizers of colloidal Ag2S quantum dots IR luminescence depending on the energy characteristics. This can be used as the basis of use of such hybrid nanostructures in fluorescent indication of organic dye molecules and biological objects in the IR region.

 

1. Tang R., Xue J., Xu B., Shen D. , Sudlow G.P., Achilefu S. Tunable ultrasmall visible-to-extended near-Infrared emitting silver Sulfide quantum dots for Integrin-Targeted Cancer Imaging // ASC Nano. 2015. V. 9. P. 220-230.
2. Lam S.K., Chan M.A., Lo D. Characterization of phosphorescence oxygen sensor based on erythrosine B in sol-gel silica in wide pressure and temperature ranges // Sensors and Actuators B. 2001. V. 73. P. 135-141.
3. Tsay J.M. [et al.] Singlet oxygen production bypeptide-coated quantum dot-photosensitizer conjugates // J. of Am. Chem. Soc. 2007. V. 129. P. 6865-6871.
4. Tatikolov A.S., Costa S.M.B. Complexation of polymethine dyes with human serum albumin: a spectroscopic study // Biophys. Chem. 2004. V. 107. P. 33-49.
5. Halpert J.E., Tischler J.R., Nair G., Walker B.J., Liu W., Bulovic V., Bawendi M.G. Electrostatic formation ofquantum dot/J-aggregate FRET pairs in solution // J. Phys. Chem. C. 2009. V. 113. P. 9986.
6. Orlova A.O., Gromova Yu.A., Maslov V.G., Andreeva O.V., Baranov A.V. Reversible photoluminescence quenchin of CdSe/ZnS quantum dots embeddes in porous glass by ammonia vapor // Nanotechnology. 2013. V. 24. R. 335701.
7. Ovchinnikov O.V., Smirnov M.S., Shatskikh T.S., Khokhlov V.Yu., Shapiro B.I., Vitukhnovsky A.G., Ambrozevich S.A. Spectroscopic investigation of colloidal CdS quantum dots - methylene blue hybrid associates // J. Nanopart. Res. 2014. V. 16. R. 2286.
8. Ovchinnikov O.V., Smirnov M.S., SHapiro B.I., Dedikova A.O., SHatskikh T.S. Spektroskopicheskie projavlenija gibridnojj associacii kolloidnykh kvantovykh tochek CdS s J-agregatami tiatrimetincianinovogo krasitelja // Optika i spektroskopija. 2015. T. 19. S. 13.
9. Jiang P., Zhu Ch.-N., Zhang Z.-L., Tian Z.-Q., Pang D.-W. Water-solube Ag₂S quantum dots for near-infrared fluorescence imaging in vivo / // Biomaterials. 2012. V. 33. P. 5130.
10. Ovchinnikov O.V., Smirnov M.S., SHapiro B.I., SHatskikh T.S., Perepelica A.S., Korolev N.V. Opticheskie i strukturnye svojjstva ansamblejj kolloidnykh kvantovykh tochek Ag₂S v zhelatine // FTP. 2015. T. 49. S. 385.
11. Patent №2538262 (RF). Sposob poluchenija poluprovodnikovykh kantovykh tochek sulfida serebra. / O.V. Ovchinnikov, M.S. Smirnov, B.I. SHapiro, T.S. SHatskikh, A.S. Perepelica, V.JU.KHokhlov.
12. Tubtimtae A., Cheng K.-Y., Lee M.-W. Ag₂S quantum dot-sensitized WO₃photoelectrodes for solar sells // J. Solid State Electrochem. 2014. V. 18. № 6. P. 1627.
13. Liu H., Feng. Y., Chen D., Li Ch., Cui P., Yang J. Noble metal-based composite nanomaterials fabricated via solution-based approaches // J. Mater. Chem. A. 2015. V. 3. P. 3182.
14. Shapiro B.I. Molecular assembles of polymethine dyes // Russ. Chem. Rev. 2006. V. 75. № 5. P. 433.