Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Andrei Kostrov"'
Autor:
Victor Ivanov, Anna Lizunova, Oxana Rodionova, Andrei Kostrov, Denis Kornyushin, Arseniy Aybush, Arina Golodyayeva, Alexey Efimov, Victor Nadtochenko
Publikováno v:
Nanomaterials, Vol 12, Iss 3, p 448 (2022)
We proposed a novel method of nanostructure preparation for observation of surface-enhanced Raman spectroscopy (SERS) and metal-enhanced fluorescence (MEF) based on the deposition of gold nanoparticles (GNPs) above the thin dye film by dry aerosol pr
Externí odkaz:
https://doaj.org/article/513310b655584700811c6398b34b1504
Autor:
Dmitry Cherepanov, Andrei Kostrov, Fedor Gostev, Ivan Shelaev, Mikhail Motyakin, Sergei Kochev, Yuriy Kabachii, Victor Nadtochenko
Publikováno v:
Nanomaterials, Vol 11, Iss 11, p 3007 (2021)
For the first time, a specific time-delayed peak was registered in the femtosecond transient absorption (TA) spectra of ZnxCd1−xS/ZnS (x~0.5) alloy quantum dots (QDs) doped with Mn2+, which was interpreted as the electrochromic Stark shift of the b
Externí odkaz:
https://doaj.org/article/74d4483e841c4faab5eb98cc993bfc5b
Autor:
Olga Yu. Antonova, Sergey Yu. Kochev, Artyom A. Astafiev, Yurii A. Kabachii, Andrei Kostrov, Sergey S. Abramchuk, Victor A. Nadtochenko, Alexandre S. Golub
Publikováno v:
Mendeleev Communications. 31:315-318
The effect of doping of the ZnxCd1−xS (x = 0.37–0.50) alloy nanocrystals with Mn2+ ions on the rate and apparent quantum yield of the photocatalytic H2 evolution catalyzed by this alloy has been investigated. It has been found that the ZnS shell
Autor:
Ivan V. Shelaev, Yu. A. Kabachiy, S. Yu. Kochiev, Andrei Kostrov, Fedor E. Gostev, O. Yu. Antonova, Pyotr M. Valetsky, V. A. Nadtochenko, Arseniy V. Aybush
Publikováno v:
High Energy Chemistry. 54:421-426
It has been shown that luminescence in Mn@Zn0.49Cd0.51S/ZnS quantum dots (QDs) in propylene carbonate is due to a single Mn2+(4T1 → 6A1) band and has a quantum yield of ~24%. The Mn2+(4T1) level is excited through the light absorption in the excito
Autor:
A. A. Titov, Pyotr M. Valetsky, V. A. Nadtochenko, Denis Shepel, Ivan V. Shelaev, Olga Yu. Antonova, Arseniy V. Aybush, Yuriy Kabachii, Andrei Kostrov, Fedor E. Gostev, Sergei Kochev
Publikováno v:
Applied Physics A. 126
Biexcitons localized at ZnxCd1−xS quantum dots (x = 0.37 or 0.45) with a diameter of ~ 45 A synthesized by two different methods were studied by femtosecond laser spectroscopy. The spectral features of ultrafast transient absorption spectra at the
Autor:
Sergey Yu. Kochev, Victor A. Nadtochenko, Ivan V. Shelaev, Denis Shepel, Andrei Kostrov, Yuriy Kabachii, Fedor E. Gostev, A. A. Titov, Olga Yu. Antonova, Arseniy V. Aybush
Publikováno v:
Chemical Physics Letters. 743:137160
Stimulated emission (SE) 4T1 → 6A1 bands of Mn2+(3d5) in ZnxCd1−xS or ZnxCd1−xS/ZnS quantum dots were detected in the femtosecond transient absorption spectra at a time delay of 120 fs. Multiexponential rise of SE(Mn2+) amplitude due to nonradi
Autor:
Victor A. Nadtochenko, Aleksei Semenov, Vitaliy Nikandrov, Galina Nizova, Igor Shagadeev, Arseny V. Aybush, A. Kanaev, Andrei Kostrov, Fedor E. Gostev, Vladimir V Shuvalov, Yanina Borisova, Eugeniy Lukashov, Ivan S. Shelaev, Mamadou Traore
Publikováno v:
Recent Patents on Catalysis. 2:91-100
Autor:
Oleg M. Sarkisov, G. V. Nizova, Andrei Kanaev, V. A. Nadtochenko, A. V. Aibushev, Ivan V. Shelaev, N. N. Denisov, Andrei Kostrov, Fedor E. Gostev
Publikováno v:
High Energy Chemistry. 45:428-433
The dynamics of relaxation processes for single-type Au nanoparticles in the form of aqueous colloid and nanoparticles embedded in a TiO2 film have been investigated by femtosecond laser photolysis techniques. It has been shown that the theoretical m
Autor:
I. V. Shelayev, A. V. Aybushev, N. N. Denisov, D V Khudyakov, Andrei Kostrov, Fedor E. Gostev, V. A. Nadtochenko, Oleg M. Sarkisov
Publikováno v:
High Energy Chemistry. 45:250-257
Excitation of pure chloroform or a gold colloid in chloroform (average nanoparticle diameter of 2.5 nm) with 740-nm femtosecond pulses of 23-fs duration leads to oscillations in the differential absorption signal ΔA(λ, t) recorded using white-light
Autor:
Mamadou Kaba Traoré, Victor A. Nadtochenko, Luc Museur, Arseniy Aiboushev, Oleg M. Sarkisov, Andrei Kostrov, Andrei Kanaev, Fedor E. Gostev, Ivan V. Shelaev
Publikováno v:
Photochemicalphotobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology. 12(4)
Transient absorption spectra of gold nanoparticles (AuNPs) embedded in mesoporous TiO2 film were studied by a femtosecond laser photolysis pump-probe technique using 25 fs pulses at 740 nm (1.68 eV) and a low fluence of 24 μJ cm(-2). The shift of th