Development of the fluorescent carbon nanosensor for pH and temperature of liquid media with artificial neural networks

Sarmanova, Olga; Laptinskiy, Kirill; Khmeleva, Maria Y.; Burikov, Sergey; Доленко, С. А.; Tomskaya, A. E.; Dolenko, Tatiana A.

doi:10.1016/j.saa.2021.119861

Cited by 19 publications

(11 citation statements)

References 27 publications

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“…CD were synthesized by hydrothermal method from citric acid and ethylendiamine. Detailed description of the synthesis of CD with polyfunctional surface (CD-poly) can be found in [16]. To obtain CD-poly, 550 mg of citric acid powder were diluted in 15 ml of deionized water, then 3.5 ml of ethylendiamine was added.…”

Section: Synthesis Of CD and Preparation Of Suspensionsmentioning

confidence: 99%

“…Thus, CD have an intensive photoluminescence (PL) in the visible spectrum range: the luminescence quantum yield is about tens of percents [5,6]. PL spectrum characteristics of CD are sensitive to changes in parameters of the medium and its different components strength of hydrogen bonds in the suspension [7], presence of ions and biomolecules [8,9], pH factor [9][10][11][12][13][14][15], temperature [16], etc. This sensitivity suggests prospects of CD use as different nanosensors.…”

Section: Introductionmentioning

confidence: 99%

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Dependence of photoluminescence of carbon dots with different surface functionalization on hydrogen factor of water

Yu.

Laptinskiy

Kasyanova

et al. 2022

Optics and Spectroscopy

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The pH dependences of the photoluminescence of carbon dots synthesized by the hydrothermal method with polyfunctional and monofunctional (carboxylated and hydroxylated) surfaces have been studied. As a result of the analysis of the obtained photoluminescence and absorption spectra of aqueous suspensions of all studied types of carbon dots at different pH values, a significant effect of the acidity of the environment of nanoparticles on their optical properties was found. It has been found that the greatest changes in the spectral characteristics of absorption and photoluminescence of carbon dots with COOH, OH, and NH2 surface groups appear in the pH ranges of 2-5 and 8-12. The obtained results are explained are explained by the processes of protonation/deprotonation of the surface groups of carbon dots. Keywords: carbon dots, surface functionalization, absorption spectroscopy, photoluminescence, hydrogen index, deprotonation.

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Section: Synthesis Of CD and Preparation Of Suspensionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dependence of photoluminescence of carbon dots with different surface functionalization on hydrogen factor of water

Yu.

Laptinskiy

Kasyanova

et al. 2022

Optics and Spectroscopy

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“…The use of ionic liquids helps to strengthen this characteristic. Sarmanova et al [5], proposed a fluorescent nanosensor based on carbon dots for the measurement of pH and temperature. In their work, they used Neural Networks to simultaneously determine the value of pH and ambient temperature, achieving an accuracy of 0.0005 pH and 0.67 °C, respectively.…”

Section: Introductionmentioning

confidence: 99%

A Novel NoC-Based Neural Networks Design for Implementation of A Biosensor Solution

et al. 2023

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Graphene-based nanosensors are used in many applications to monitor and survey physical or chemical phenomena. The use of Graphene improves the mechanical, electrochemical, optical, and magnetic properties of nanosensors due to its properties such as physical properties. But there are some characteristics and measurements that must be taken to manufacture such sensors. In this work, a Neural Network (NN) has been proposed that can predict the values of UV (ultraviolet) measurements, which are wavelength and absorption, based on XRD (X Ray Diffraction) measurements, namely diameter (in millimeters) and angle (theta in degrees). The proposed NN was developed on Network-on-Chip (NoC) to take advantage of the high level of parallelism and computing power provided by NoC. In addition, we used an adaptive XY routing algorithm due to its simplicity and allows exploiting multiple paths to route packets to their destination which reduces the number of lost packets due to the high injection rate without introducing any latency. Moreover, we proposed a mapping algorithm to extract maximum performance from the adaptive XY algorithm. The obtained results show the efficiency of the proposed architecture, as it allows packets to take different paths. Thus, the traffic is distributed across the network and significantly reduces packet loss. Moreover, the equal length of these paths allows avoidance of latency. HIGHLIGHTS Network-on-chip (NoC) is a powerful tool for implementing artificial neural networks, thanks to its high level of parallelism and computing power The Adaptive XY algorithm eliminates the need for a routing table and allows traffic to be distributed over the NoC The proposed mapping algorithm allows for better traffic management within the NoC, thereby enhancing performance in terms of reducing lost packets GRAPHICAL ABSTRACT

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“…One of the applications of such CDs’ properties is the sensorics of the environment . Sensors of pH and temperature, bioactive molecules, metal ions in liquid media , have been developed on the basis of CD.…”

Section: Introductionmentioning

confidence: 99%

“…13 In addition, the surface photoluminescence caused by local surface states is typical for all CDs. 13 These electronic states are significantly affected by the environment: solvent, 14 pH, 15,16 temperature, 17 interactions with ions and molecules in the environment, 14,17 etc. One of the applications of such CDs' properties is the sensorics of the environment.…”

Section: Introductionmentioning

confidence: 99%

Quenching of Photoluminescence of Carbon Dots by Metal Cations in Water: Estimation of Contributions of Different Mechanisms

Vervald,

Laptinskiy,

Chugreeva

et al. 2023

J. Phys. Chem. C

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All carbon nanoparticles with a developed surface exhibit photoluminescence (PL), the surface origin of which makes it possible to create environmental nanosensors based on it. The active development of sensors for metal ions based on the photoluminescence of carbon dots (CDs) has shown that the quenching of CDs’ photoluminescence can occur due to different mechanisms. However, the magnitude of their contributions to total PL quenching has not been studied. This article presents the results of studies of the mechanisms of photoluminescence quenching in aqueous solutions of carbon dots of hydrothermal synthesis by metal cations: Co2+, Cu2+, Mg2+, Ni2+, Pb2+, Zn2+, Al3+, Cr3+, and Fe3+. It was established that, for different ions, the following mechanisms make significant contributions to the quenching of the photoluminescence of carbon dots in water: the effect of an inner filter; static quenching due to changes in luminophores caused by (de)protonation of the surface groups of carbon dots with a change of pH value; dynamic quenching. Their contributions to the total quenching of photoluminescence of nanoparticles and the limits of detection were quantitatively determined. The conducted research can be used as an algorithm for the analysis of photoluminescence quenching of carbon nanoparticles by any ions in complex media.

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Development of the fluorescent carbon nanosensor for pH and temperature of liquid media with artificial neural networks

Cited by 19 publications

References 27 publications

Dependence of photoluminescence of carbon dots with different surface functionalization on hydrogen factor of water

Dependence of photoluminescence of carbon dots with different surface functionalization on hydrogen factor of water

A Novel NoC-Based Neural Networks Design for Implementation of A Biosensor Solution

Quenching of Photoluminescence of Carbon Dots by Metal Cations in Water: Estimation of Contributions of Different Mechanisms

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