Irina A. Arefina

ITMO University

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Elena V. Ushakova

City University of Hong Kong

АВ

А. В. Баранов

ITMO University

A. V. Fëdorov

ITMO University

Evgeniia A. Stepanidenko

ITMO University

Sergei A. Cherevkov

ITMO University

Andrey L. Rogach

City University of Hong Kong

Aliaksei Dubavik

ITMO University

Pavel Khavlyuk

TU Dresden

Aleksandra V. Koroleva

St Petersburg University

Evgeniy V. Zhizhin

St Petersburg University

Cooperative Institutions

ITMO University

St Petersburg University

Institute of Information Technologies

Moscow Power Engineering Institute

Russian Academy of Sciences

Ioffe Institute

City University of Hong Kong

Peter the Great St. Petersburg Polytechnic University

St. Petersburg College

State Optical Institute named after SI Vavilov

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Carbon Dot Emission Enhancement in Covalent Complexes with Plasmonic Metal Nanoparticles

Nanomaterials (2023)

Irina A. Arefina D. A. Kurshanov Anna A. Vedernikova Denis V. Danilov Aleksandra V. Koroleva

Carbon dots can be used for the fabrication of colloidal multi-purpose complexes for sensing and bio-visualization due to their easy and scalable synthesis, control of their spectral responses over a wide spectral range, and possibility of surface functionalization to meet the application task. Here, we developed a chemical protocol of colloidal complex formation via covalent bonding between carbon dots and plasmonic metal nanoparticles in order to influence and improve their fluorescence. We demonstrate how interactions between carbon dots and metal nanoparticles in the formed complexes, and thus their optical responses, depend on the type of bonds between particles, the architecture of the complexes, and the degree of overlapping of absorption and emission of carbon dots with the plasmon resonance of metals. For the most optimized architecture, emission enhancement reaching up to 5.4- and 4.9-fold for complexes with silver and gold nanoparticles has been achieved, respectively. Our study expands the toolkit of functional materials based on carbon dots for applications in photonics and biomedicine to photonics.

Carbon fibers

Surface Modification

Silver nanoparticle

10.3390/nano13020223

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Citations (4)

Исследование влияния растворителей и дополнительных прекурсоров на оптические свойства углеродных точек из о-фенилендиамина

Оптика и спектроскопия (2022)

Irina A. Arefina Anna A. Vedernikova А.А. Федоров А. В. Баранов Е.В. Ушакова

Carbon fibers

10.21883/os.2022.08.52915.3318-22

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Strongly Luminescent Composites Based on Carbon Dots Embedded in a Nanoporous Silicate Glass

Nanomaterials (2020)

Evgeniia A. Stepanidenko Pavel Khavlyuk Irina A. Arefina Sergei A. Cherevkov Yuan Xiong

Luminescent composites based on entirely non-toxic, environmentally friendly compounds are in high demand for a variety of applications in photonics and optoelectronics. Carbon dots are a recently developed kind of luminescent nanomaterial that is eco-friendly, biocompatible, easy-to-obtain, and inexpensive, with a stable and widely tunable emission. Herein, we introduce luminescent composites based on carbon dots of different chemical compositions and with different functional groups at the surface which were embedded in a nanoporous silicate glass. The structure and optical properties of these composites were comprehensively examined using electron microscopy, Fourier transform infrared transmission, UV-Vis absorption, and steady-state and time-resolved photoluminescence. It is shown that the silicate matrix efficiently preserved, and even enhanced the emission of different kinds of carbon dots tested. The photoluminescence quantum yield of the fabricated nanocomposite materials reached 35–40%, which is comparable to or even exceeds the values for carbon dots in solution.

Nanoporous

Silicate glass

Carbon fibers

10.3390/nano10061063

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Citations (19)

Effect of Fe-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=- nanoparticle concentration on the luminescence of AgInS-=SUB=-2-=/SUB=-/ZnS in hybrid complex CaCO-=SUB=-3-=/SUB=--Fe-=SUB=-3-=/SUB=-O-=SUB=-4-=/SUB=-@AgInS-=SUB=-2-=/SUB=-/ZnS-=SUP=-*-=/SUP=-

Оптика и спектроскопия (2021)

D. A. Kurshanov Irina A. Arefina M. S. Stepanova Aliaksei Dubavik А. В. Баранов

10.21883/os.2021.11.51649.1418-21

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Influence of heteroatoms on optical properties and photoluminescence kinetics of carbon dots

Journal of Physics Conference Series (2020)

Irina A. Arefina Pavel Khavlyuk Evgeniia A. Stepanidenko Aliaksei Dubavik Sergei A. Cherevkov

Abstract Carbon dots have attracted much attention due to the ease of synthetic methods and their stable photoluminescence with relatively high quantum yield. By the doping of carbon dot by heteroatoms the optical transitions can be tuned in a wide spectral range. In this work, the impact of heteroatoms on the optical properties of carbon dots has been investigated: the appearance of the luminescent states attributed to the CD surface states and the dependence of the photoluminescence lifetime versus emission wavelength have been revealed.

Heteroatom

Carbon fibers

Quantum yield

10.1088/1742-6596/1461/1/012008

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Citations (2)

Carbon Dots with an Emission in the Near Infrared Produced from Organic Dyes in Porous Silica Microsphere Templates

Nanomaterials (2022)

Evgeniia A. Stepanidenko Ivan D. Skurlov Pavel Khavlyuk D. A. Onishchuk Aleksandra V. Koroleva

Carbon dots (CDs) with an emission in the near infrared spectral region are attractive due to their promising applications in bio-related areas, while their fabrication still remains a challenging task. Herein, we developed a template-assisted method using porous silica microspheres for the formation of CDs with optical transitions in the near infrared. Two organic dyes, Rhodamine 6G and IR1061 with emission in the yellow and near infrared spectral regions, respectively, were used as precursors for CDs. Correlation of morphology and chemical composition with optical properties of obtained CDs revealed the origin of their emission, which is related to the CDs' core optical transitions and dye-derivatives within CDs. By varying annealing temperature, different kinds of optical centers as derivatives of organic dyes are formed in the microsphere's pores. The template-assisted method allows us to synthesize CDs with an emission peaked at 1085 nm and photoluminescence quantum yield of 0.2%, which is the highest value reported so far for CDs emitting at wavelengths longer than 1050 nm.

Rhodamine 6G

Template

Quantum yield

10.3390/nano12030543

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Citations (24)

Nanoscale molecular clusters coupled to nanostructured surfaces

Rezida Nabiullina Anton A. Starovoytov N. A. Toropov I. A. Gladskikh Antonina Dadadzhanova

Nanoscale molecular clusters are fascinating fluorescent nanomaterials formed by highly ordered assembly of organic dyes with the optical properties strongly different from those of monomolecules. Hybrid films formed by pseudoisocyanine dye coated metal nanoparticles on a sapphire substrate or nanoporous alumina on an aluminum substrate were studied with steady‐state and time-resolved spectroscopy. On-surface reaction caused isomerization of cyanine molecules as well as self-assembly into molecular nanoclusters, so called J‐aggregates. The excitonic band of clusters had been strongly coupled to plasmonic response of metal nanoparticles. The dynamics of the strong coupling regime was directly analyzed depending on environmental conditions (temperature and presence of gas analyte). The energy transfer of the optical excitation from oxygen vacancies of alumina to the molecular clusters was observed depending on the anodization conditions of the aluminum substrate. Such unique feature should provide a new approach to develop new sensors.

Cyanine

Nanoclusters

Nanoporous

Nanomaterials

Nanodot

10.1117/12.2596924

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Dual-Purpose Sensing Nanoprobe Based on Carbon Dots from o-Phenylenediamine: pH and Solvent Polarity Measurement

Nanomaterials (2022)

Anna A. Vedernikova Mikhail D. Miruschenko Irina A. Arefina Anton A. Babaev Evgeniia A. Stepanidenko

Today, the development of nanomaterials with sensing properties attracts much scientific interest because of the demand for low-cost nontoxic colloidal nanoprobes with high sensitivity and selectivity for various biomedical and environment-related applications. Carbon dots (CDs) are promising candidates for these applications as they demonstrate unique optical properties with intense emissions, biocompatibility, and ease of fabrication. Herein, we developed synthesis protocols to obtain CDs based on o-phenylenediamine with a variety of optical responses depending on additional precursors and changes in the reaction media. The obtained CDs are N-doped (N,S-doped in case of thiourea addition) less than 10 nm spherical particles with emissions observed in the 300−600 nm spectral region depending on their chemical composition. These CDs may act simultaneously as absorptive/fluorescent sensing probes for solvent polarity with ∆S/∆ENT up to 85, for ∆ENT from 0.099 to 1.0 and for pH values in the range of 3.0−8.0, thus opening an opportunity to check the pH in non-pure water or a mixture of solvents. Moreover, CDs preserve their optical properties when embedded in cellulose strips that can be used as sensing probes for fast and easy pH checks. We believe that the resulting dual-purpose sensing nano probes based on CDs will have high demand in various sensing applications.

Nanoprobe

Nanomaterials

Carbon fibers

10.3390/nano12193314

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Citations (13)

Influence of the solvent environment on luminescent centers within carbon dots

Nanoscale (2019)

Evgeniia A. Stepanidenko Irina A. Arefina Pavel Khavlyuk Aliaksei Dubavik Kirill Bogdanov

The influence of chlorine-containing solvents on the optical properties of carbon dots supports the existence of polycyclic aromatic hydrocarbons.

Carbon fibers

10.1039/c9nr08663c

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Citations (61)

Luminescence enhancement of alloyed quantum dots bound to gold nanoparticles by mercaptocarboxylic acids in colloidal complexes

Nanotechnology (2019)

Т. К. Кормилина Irina A. Arefina Evgeniia A. Stepanidenko D. A. Kurshanov Sergei A. Cherevkov

The understanding of the physical mechanisms of the nanoobjects interaction within the nanostructured complex materials is one of the main tasks for the development of novel materials with tunable properties. In this work, we develop a formation procedure of the colloidal complexes based on alloyed CdZnSe/ZnS quantum dots and gold nanoparticles where the various mercaptocarboxylic acids are used as the binding molecules. The QD photoluminescence enhancement (up to ×3.1) can be achieved by the control of the interparticle distance in colloidal solutions. We provide a detailed discussion on the influence of the linking molecules on the nanoparticle complexes optical parameters through the steady-state and time-resolved spectral measurements.

10.1088/1361-6528/ab3bdc

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Citations (0)