Hybrid organic/inorganic semiconductor nanostructures with highly efficient energy transfer

Savateeva, Diana; Melnikau, Dzmitry; Lesnyak, Vladimir; Gaponik, Nikolai; Rakovich, Yury P.

doi:10.1039/c2jm30917c

Cited by 44 publications

(71 citation statements)

References 17 publications

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“…Also, because of their high oscillator strength, caused by the delocalized nature of the excitonic excitations, especially attractive are also so‐called J‐aggregates of cyanine dyes . The most representative examples of this type of absorbers are TDBC (5,6‐dichloro‐2[3‐[5,6‐dichloro‐1‐ethyl‐3‐(3‐sulfopropyl)‐2(3H)‐benzimidazolidene]‐1‐propenyl]‐1‐ethyl‐3‐(3‐sulfopropyl) benzimidazolium hydroxide), JC‐1 (5,5′,6,6′‐tetrachloro‐1,1′,3,3′‐tetraethylbenzimidazolcarbo‐cyanine iodide), and PIC (1,1′‐diethyl‐2,2′‐cyanine iodide) to mention only a few.…”

Section: Crucial Absorber Parameters For Efficient Induced Transparencymentioning

confidence: 99%

Induced Transparency in Plasmon–Exciton Nanostructures for Sensing Applications

Krivenkov

Goncharov

Nabiev

et al. 2018

Laser & Photonics Reviews

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The effect of induced transparency, which is related to photoinduced bleaching of photoabsorbers, is being intensely studied and has many applications in the field of sensing. Along with this classical effect, numerous studies on induced transparency in coupled plasmon-exciton systems, which is accompanied by the formation of hybrid states, have been recently published. The formation of a new coupled system results in various spectral modifications. For example, induced transparency manifests itself as a narrow dip in the absorption spectrum of a coupled system. This effect can be used in sensing, the feasibility of which is the main objective here, where a variety of materials and methods for obtaining the induced transparency are considered. Various morphologies and geometries of plasmonic nanoparticles are discussed as well as types of molecular absorbers to assess the most favorable combinations for the evolvement of induced transparency. The potential applications of the induced transparency effect in sensing and molecular diagnostics are summarized.As shown above, the IT effect is highly sensitive to several parameters of the composite system: the distance between the absorber and the plasmonic structure, their mutual arrangement, and the type and properties of the absorber itself. At the same time, the

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Section: Crucial Absorber Parameters For Efficient Induced Transparencymentioning

confidence: 99%

Induced Transparency in Plasmon–Exciton Nanostructures for Sensing Applications

Krivenkov

Goncharov

Nabiev

et al. 2018

Laser & Photonics Reviews

Self Cite

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“…Важнейшей особенностью гибридных ассоциатов является сочетание оптических свойств исходных компонентов и новых, гибридных свойств, возникающих в результате взаимодействия компонентов. Последние определяются преимущественно процессами обмена электронными возбуждениями между КТ и молекулами Кр, реализуемыми за счет фотоиндуцированного переноса заряда [2,11], а также безызлучательного резонансного переноса энергии [1][2][3][4][5][6][7][8][9][10][12][13][14][15][16]. Закономерности переноса возбуждения от КТ к Кр и обратно пока недостаточно исследованы.…”

Section: Introductionunclassified

Резонансный безызлучательный перенос энергии в гибридных ассоциатах молекул тионина и коллоидных квантовых точек Ag-=SUB=-2-=/SUB=-S с различными механизмами люминесценции-=SUP=-*-=/SUP=-

Смирнов¹,

Овчинников²,

Перепелица³

2019

Журнал Технической Физики

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We have considered the resonant nonradiative energy transfer in hybrid associates of thionine dye (TH^+) molecules and Ag_2S colloidal quantum dots (QDs) passivated with thioglycolic acid (Ag_2S/TGA) and Ag_2S QDs stabilized with gelatin (Ag_2S/Gel). Used samples of Ag_2S QDs possess luminescence, which arises by the exciton mechanism, as well as by the recombination mechanisms of holes with electrons localized at luminescence centers and of electrons with holes localized at the luminescence centers. The quenching of luminescence of Ag_2S/TGA QDs (1.8 nm) with a maximum at 630 nm and a decrease in the luminescence lifetime from 13.7 to 6.5 ns, which occurs upon association with TH^+ molecules, have been established. On the contrary, for associates of Ag_2S/TGA QDs (5.5 nm) with TH^+ molecules, we have observed the quenching of luminescence of the dye and a decrease in the lifetime of this luminescence from 0.43 to 0.3 ns, as well as an enhancement of luminescence of QDs. In the case of hybrid association with TH^+ molecules, the luminescence enhancement of Ag_2S/Gel QDs (1.6 nm) has been established, which results from the recombination of free holes with electrons localized at luminescence centers. Based on our analysis of the luminescence kinetics of the dye, we have inferred the occurrence of resonant nonradiative energy transfer from TH^+ molecules to centers of recombination luminescence in Ag_2S/TGA (5.5 nm) and in Ag_2S/Gel (1.6 nm) QDs with its maxima at 950 and 1205 nm, respectively. For Ag_2S/TGA QDs (2.2 nm), which luminesce with a maximum at 620 nm by the exciton mechanism, we have observed a significant overlap both between the luminescence spectra of QDs and TH^+ and between their absorption spectra. Close parameters of the luminescence kinetics for both the initial components and their associates indicate the energy transfer, which is realized in opposite directions.

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“…In this regard, special attention is paid to hybrid associates of QDs with J-aggregates of polymethine dyes [12][13][14][15][16][17][18][19]. They are characterized not only by a simple combination of the individual properties of the components but also by the generation of new properties emerging explicitly owing to hybrid association.…”

Section: Introductionmentioning

confidence: 99%

The formation and luminescent properties of hybrid associates of colloidal Ag2S quantum dots with J-aggregates of trimethinecyanine dye

2016

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Spectral patterns of hybrid association in the mixture of colloidal Ag 2 S quantum dots (QDs) with an average size of 2.5 to 0.3 nm with J-aggregates of a pyridinium salt of 3,3'-di(γ-sulphopropyl)-9-ethyl-4,5,4',5-dibenzothiacarbocyanine betaine (Dye), prepared by the sol-gel method in gelatin, are investigated. A conclusion about the preferential formation of cis-J-aggregates in the hybrid associates of Dye with Ag 2 S QDs is made. The effect of photosensitization of IR luminescence (1000-1300 nm) of colloidal Ag 2 S QDs by J-aggregates of Dye is revealed. On the basis of the results, a photosensitization scheme implying the resonance nonradiative transfer of the electronic excitation energy from cis-J-aggregates to the recombination luminescence centers of Ag 2 S QDs is suggested.

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Hybrid organic/inorganic semiconductor nanostructures with highly efficient energy transfer

Cited by 44 publications

References 17 publications

Induced Transparency in Plasmon–Exciton Nanostructures for Sensing Applications

Induced Transparency in Plasmon–Exciton Nanostructures for Sensing Applications

The formation and luminescent properties of hybrid associates of colloidal Ag2S quantum dots with J-aggregates of trimethinecyanine dye

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