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  1. Article ; Online: Self-powered triboelectric nanogenerator sensor for detecting humidity level and monitoring ethanol variation in a simulated exhalation environment.

    Mohamadbeigi, Nima / Shooshtari, Leyla / Fardindoost, Somayeh / Vafaiee, Mohaddese / Iraji Zad, Azam / Mohammadpour, Raheleh

    Scientific reports

    2024  Volume 14, Issue 1, Page(s) 1562

    Abstract: Respiration stands as a vital process reflecting physiological and pathological human health status. Exhaled breath analysis offers a facile, non-invasive, swift, and cost-effective approach for diagnosing and monitoring diseases by detecting ... ...

    Abstract Respiration stands as a vital process reflecting physiological and pathological human health status. Exhaled breath analysis offers a facile, non-invasive, swift, and cost-effective approach for diagnosing and monitoring diseases by detecting concentration changes of specific biomarkers. In this study, we employed Polyethylene oxide/copper (I) oxide composite nanofibers (PCNFs), synthesized via the electrospinning method as the sensing material to measure ethanol levels (1-200 ppm) in an exhaled breath simulator environment. The integrated contact-separation triboelectric nanogenerator was utilized to power the self-powered PCNFs exhaled breath sensor. The PCNFs-based gas sensor demonstrates promising results with values of 0.9 and 3.2 for detecting 5 ppm and 200 ppm ethanol, respectively, in the presence of interfering gas at 90% relative humidity (RH). Notably, the sensor displayed remarkable ethanol selectivity, with ratios of 10:1 to methanol and 25:1 to acetone. Response and recovery times for 200 ppm ethanol at 90 RH% were rapid, at 2.7 s and 5.8 s, respectively. The PCNFs-based exhaled breath sensor demonstrated consistent and stable performance in practical conditions, showcasing its potential for integration into wearable devices. This self-powered breath sensor enabling continuous monitoring of lung cancer symptoms and facilitating compliance checks with legal alcohol consumption limits.
    MeSH term(s) Humans ; Exhalation/physiology ; Humidity ; Ethanol ; Respiration ; Respiratory System
    Chemical Substances Ethanol (3K9958V90M)
    Language English
    Publishing date 2024-01-18
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-024-51862-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Self-powered ultraviolet/visible photodetector based on graphene-oxide via triboelectric nanogenerators performing by finger tapping.

    Ejehi, Faezeh / Shooshtari, Leyla / Mohammadpour, Raheleh / Asadian, Elham / Sasanpour, Pezhman

    Nanotechnology

    2022  Volume 33, Issue 47

    Abstract: Self-sufficient power sources provide a promising application of abundant electronic devices utilized in detection of ambient properties. Recently, triboelectric nanogenerators (TENGs) have been widely investigated to broaden the self-powered systems by ... ...

    Abstract Self-sufficient power sources provide a promising application of abundant electronic devices utilized in detection of ambient properties. Recently, triboelectric nanogenerators (TENGs) have been widely investigated to broaden the self-powered systems by converting the ambient mechanical agitations into electrical voltage and current. Graphene oxide (GO), not only for sensing applications but also as a brilliant energy-related nanomaterial, provides a wide range of controllable bandgap energies, as well as facile synthesis route. In this study, GO-based self-powered photodetectors have been fabricated by conflating the photosensitivity and triboelectric characteristics of freestanding GO paper. In this regard, photodetection via TENGs has been investigated in two forms of active and passive circuits for ultraviolet (UV) and visible illumination. The photodetector responsivity upon UV enhanced from 0.011 mA W
    Language English
    Publishing date 2022-09-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 1362365-5
    ISSN 1361-6528 ; 0957-4484
    ISSN (online) 1361-6528
    ISSN 0957-4484
    DOI 10.1088/1361-6528/ac8a52
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Ultrafast and stable planar photodetector based on SnS

    Shooshtari, Leyla / Esfandiar, Ali / Orooji, Yasin / Samadpour, Mahmoud / Rahighi, Reza

    Scientific reports

    2021  Volume 11, Issue 1, Page(s) 19353

    Abstract: Two-dimensional (2D) transition metal dichalcogenides are promising candidates of photodetectors where they are commonly grown parallel to the substrate due to their 2D characteristics in micrometer scales from exfoliation of bulk crystals or through ... ...

    Abstract Two-dimensional (2D) transition metal dichalcogenides are promising candidates of photodetectors where they are commonly grown parallel to the substrate due to their 2D characteristics in micrometer scales from exfoliation of bulk crystals or through high temperature chemical vapor deposition (CVD) methods. In this study, semi-hexagonal vertical nanosheets of SnS
    Language English
    Publishing date 2021-09-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-021-98788-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Design of effective self-powered SnS

    Shooshtari, Leyla / Ghods, Soheil / Mohammadpour, Raheleh / Esfandiar, Ali / Iraji Zad, Azam

    Scientific reports

    2022  Volume 12, Issue 1, Page(s) 7227

    Abstract: Self-powered detectors based on triboelectric nanogenerators (TENG) have been considered because of their capability to convert ambient mechanical energy to electrical out-put signal, instead of conventional usage of electrochemical batteries as power ... ...

    Abstract Self-powered detectors based on triboelectric nanogenerators (TENG) have been considered because of their capability to convert ambient mechanical energy to electrical out-put signal, instead of conventional usage of electrochemical batteries as power sources. In this regard, the self-powered photodetectors have been designed through totally two lay out called passive and active circuit. in former model, impedance matching between the TENG and the resistance of the circuit's elements is crucial, which is not investigated systematically till now. In this paper, a cost effective novel planar photodetector (PD) based on heterojunction of SnS
    Language English
    Publishing date 2022-05-04
    Publishing country England
    Document type Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-11327-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: TiO(2) fibers enhance film integrity and photovoltaic performance for electrophoretically deposited dye solar cell photoanodes.

    Shooshtari, Leyla / Rahman, Masoud / Tajabadi, Fariba / Taghavinia, Nima

    ACS applied materials & interfaces

    2011  Volume 3, Issue 3, Page(s) 638–641

    Abstract: Nanoparticulated TiO(2) fibers as one-dimensional long structures were introduced into TiO(2) P25 nanoparticle films using coelectrophoretic deposition. This prevented the usual crack formation occurring in wet coatings, and resulted in less porosity and ...

    Abstract Nanoparticulated TiO(2) fibers as one-dimensional long structures were introduced into TiO(2) P25 nanoparticle films using coelectrophoretic deposition. This prevented the usual crack formation occurring in wet coatings, and resulted in less porosity and higher roughness factor of the films that provided more favorable conditions for electron transport. The films used as the photoanode of a dye solar cell (DSC) produced 65% higher photovoltaic efficiency. TiO(2) fibers can be excellent binders in single-step, organic-free electrophoretic deposition of TiO(2) for DSC photoanode.
    MeSH term(s) Electric Power Supplies ; Electrodes ; Electroplating/methods ; Equipment Design ; Equipment Failure Analysis ; Membranes, Artificial ; Solar Energy ; Titanium/chemistry
    Chemical Substances Membranes, Artificial ; titanium dioxide (15FIX9V2JP) ; Titanium (D1JT611TNE)
    Language English
    Publishing date 2011-03
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8244
    ISSN 1944-8244
    DOI 10.1021/am101177b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Nanoparticulate hollow TiO2 fibers as light scatterers in dye-sensitized solar cells: layer-by-layer self-assembly parameters and mechanism.

    Rahman, Masoud / Tajabadi, Fariba / Shooshtari, Leyla / Taghavinia, Nima

    Chemphyschem : a European journal of chemical physics and physical chemistry

    2011  Volume 12, Issue 5, Page(s) 966–973

    Abstract: Hollow structures show both light scattering and light trapping, which makes them promising for dye-sensitized solar cell (DSSC) applications. In this work, nanoparticulate hollow TiO(2) fibers are prepared by layer-by-layer (LbL) self-assembly ... ...

    Abstract Hollow structures show both light scattering and light trapping, which makes them promising for dye-sensitized solar cell (DSSC) applications. In this work, nanoparticulate hollow TiO(2) fibers are prepared by layer-by-layer (LbL) self-assembly deposition of TiO(2) nanoparticles on natural cellulose fibers as template, followed by thermal removal of the template. The effect of LbL parameters such as the type and molecular weight of polyelectrolyte, number of dip cycles, and the TiO(2) dispersion (amorphous or crystalline sol) are investigated. LbL deposition with weak polyelectrolytes (polyethylenimine, PEI) gives greater nanoparticle deposition yield compared to strong polyelectrolytes (poly(diallyldimethylammonium chloride), PDDA). Decreasing the molecular weight of the polyelectrolyte results in more deposition of nanoparticles in each dip cycle with narrower pore size distribution. Fibers prepared by the deposition of crystalline TiO(2) nanoparticles show higher surface area and higher pore volume than amorphous nanoparticles. Scattering coefficients and backscattering properties of fibers are investigated and compared with those of commercial P25 nanoparticles. Composite P25-fiber films are electrophoretically deposited and employed as the photoanode in DSSC. Photoelectrochemical measurements showed an increase of around 50% in conversion efficiency. By employing the intensity-modulated photovoltage and photocurrent spectroscopy methods, it is shown that the performance improvement due to addition of fibers is mostly due to the increase in light-harvesting efficiency. The high surface area due to the nanoparticulate structure and strong light harvesting due to the hollow structure make these fibers promising scatterers in DSSCs.
    Language English
    Publishing date 2011-04-04
    Publishing country Germany
    Document type Journal Article
    ISSN 1439-7641
    ISSN (online) 1439-7641
    DOI 10.1002/cphc.201000950
    Database MEDical Literature Analysis and Retrieval System OnLINE

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