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Full-Text Articles in Physical Sciences and Mathematics
Effect Of Graphene Oxide On Spectral-Luminescenct Properties Of Xanthene Dye, E. V. Seliverstova, E. Zh. Alikhaidarova, N. Kh. Ibrayev
Effect Of Graphene Oxide On Spectral-Luminescenct Properties Of Xanthene Dye, E. V. Seliverstova, E. Zh. Alikhaidarova, N. Kh. Ibrayev
Eurasian Journal of Physics and Functional Materials
The effect of graphene oxide on the spectral and luminescent properties of xanthene dyes was studied. During the interaction of graphene oxide (GO) with a cationic dye, aggregation of Rhodamine 6G occurs, which is expressed as an increase in the optical density of the short-wavelength shoulder in the absorption spectrum of the dye. GO sheets can act as adsorption centers for dye molecules due to the influence of the Coulomb and intermolecular forces between GO and Rhodamine 6G. This effect is practically not pronounced for anionic dyes. The quenching of the dye fluorescence intensity in the presence of GO was …
Decreasing Of The Concentration Quenching Of Fluorescent Dye In A Solution By Introducing It To Nanoparticles Of Silicon Dioxide, A. I. Mantel, A. E. Yensebayeva, S. B. Smatov, I. S. Irgibayeva
Decreasing Of The Concentration Quenching Of Fluorescent Dye In A Solution By Introducing It To Nanoparticles Of Silicon Dioxide, A. I. Mantel, A. E. Yensebayeva, S. B. Smatov, I. S. Irgibayeva
Eurasian Journal of Physics and Functional Materials
The technique of introduction a fluorescent dye Tris(bipyridine)ruthenium (II) chloride into nanoparticles of silicon dioxide in isopropyl alcohol was tested. The preparation of nanoparticles was carried out by means of the Stober method. The optimal reaction conditions were determined. It was found out that the penetration of a dye into silicon dioxide nanoparticles reduced the effect of concentration quenching of the dye and made it possible to achieve an increase in fluorescence intensity in the solution more than twofold. An attempt was made to functionalize the obtained particles by introducing amino groups onto the particle surface. Fused silver nanoparticles were …
Influence Of Overlapping Between The Fluorescence Spectra Of Dye Molecules And The Spectrum Of Plasmon Absorption Of Silver Nanoparticles On The Luminescence Of Laser Dyes In Ethyl Alcohol, A. K. Aimukhanov, N. Kh. Ibrayev
Influence Of Overlapping Between The Fluorescence Spectra Of Dye Molecules And The Spectrum Of Plasmon Absorption Of Silver Nanoparticles On The Luminescence Of Laser Dyes In Ethyl Alcohol, A. K. Aimukhanov, N. Kh. Ibrayev
Eurasian Journal of Physics and Functional Materials
In the present work, the influence of the degree of overlapping between the plasmon absorption spectrum of silver nanoparticles and the luminescence spectra of P6Zh, phenalamine 160, and oxazine 17 on their luminescence was studied. With the addition of Ag NPs to the ethanol solution, the absorption of dyes depends on the concentration of Ag nanoparticles. The overlapping integrals between the plasmon absorption spectrum of Ag NPs and the absorption spectra of the studied dyes were 24.2 for P6J, 52 for phenalemine 160 and 38.5 for oxazine 17, respectively. The optical density in the maximum increased 1.6-fold for P6Zh, 1.4-fold …