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3 article(s) from Davydova, Marina

A chemiresistive sensor array based on polyaniline nanocomposites and machine learning classification

Jiri Kroutil,
Alexandr Laposa,
Ali Ahmad,
Jan Voves,
Vojtech Povolny,
Ladislav Klimsa,
Marina Davydova and
Miroslav Husak

Beilstein J. Nanotechnol. 2022, 13, 411–423, doi:10.3762/bjnano.13.34

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Figure 1: SEM micrographs of deposited layers on an interdigital transducer structure: (a) PANI/ZnO, (b) PANI...

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Figure 2: The Raman spectra of the PANI.

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Figure 3: Current–voltage characteristics of active layers.

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Figure 4: Temperature dependence characteristics of active layers.

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Figure 5: Schematic diagram of the gas sensing characterizations apparatus.

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Figure 6: Gas characterization of active layers towards (a) 25 ppm of NH₃, (b) 25 ppm of NO₂, (c) 25 ppm of C...

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Figure 7: The responses of sensing layers for different concentrations of NH₃.

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Figure 8: Gas characterization of active layers to different concentrations of NH₃ at 80 °C.

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Figure 9: The summary of the gas sensor responses for all active layers.

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Figure 10: RH dependences of the sensing layers.

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Figure 11: Two-dimensional (a) LDA and (b) PCA projections of extracted features.

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Figure 12: Total classification accuracy using the five classifiers SVM, KNN, DT, RF, and GPC with K-fold cros...

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Figure 13: Sensor array fabrication.

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Figure 14: Sensor array with nanocomposite sensing layers with dimensions and bottom view with heating element...

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Figure 15: Smart sensing system block diagram.

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Full Research Paper

Published 27 Apr 2022

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Gas-sensing behaviour of ZnO/diamond nanostructures

Marina Davydova,
Alexandr Laposa,
Jiri Smarhak,
Alexander Kromka,
Neda Neykova,
Josef Nahlik,
Jiri Kroutil,
Jan Drahokoupil and
Jan Voves

Beilstein J. Nanotechnol. 2018, 9, 22–29, doi:10.3762/bjnano.9.4

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Figure 1: Schematic drawing of the sensor assembly designs: (a) continuous NCD film, (b) ZnO nanorods, and (c...

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Figure 2: SEM surface morphology and corresponding plot of sensor response as a function of the time at a fix...

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Figure 3: (a) Raman spectra and (b) X-ray diffraction patterns of sensor devices based on NCD thin film (blue...

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Figure 4: Simulated interaction between an NO₂ gas molecule and the non-polar hybrid ZnO NRs/NCD sensor with ...

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Figure 5: Transmission spectra of the hybrid ZnO/NCD structure without and with one or two NO₂ molecules at t...

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Figure 6: Transmission spectra of hybrid ZnO NRs/NCD sensor structure with and without one CO₂ molecule. Zero...

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Figure 7: Electron density distribution of (a) T-shaped NO₂ and (b) L-shaped NO₂ molecules.

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Full Research Paper

Published 03 Jan 2018

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Gas sensing properties of nanocrystalline diamond at room temperature

Marina Davydova,
Pavel Kulha,
Alexandr Laposa,
Karel Hruska,
Pavel Demo and
Alexander Kromka

Beilstein J. Nanotechnol. 2014, 5, 2339–2345, doi:10.3762/bjnano.5.243

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Figure 1: (a) SEM surface morphology of an NCD-coated sensor substrate with IDEs with separation of 200 µm an...

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Figure 2: (a) SEM surface morphology of an NCD-coated sensor substrate with IDEs with separation of 50 µm and...

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Figure 3: (a) SEM surface morphology of an NCD-coated sensor substrate with IDEs with separation of 50 µm and...

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Figure 4: SEM images of NCD-coated, fully-integrated sensor substrates on a micro-hotplate with IDEs (separat...

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Figure 5: Time dependence of the impedance of fully-integrated sensor substrates coated with NCD; IDEs separa...

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Figure 6: Raman spectrum of the NCD film. The sharp peak at 1330 cm⁻¹ provides evidence of the diamond charac...

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Figure 7: Current density profile for a single pair of IDEs covered by intrinsic diamond with a hydrogenated ...

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Figure 8: Schematic drawing of the sensor assemblies with diamond coatings: (a) continuous NCD film on IDEs w...

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Published 04 Dec 2014

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