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  1. Article ; Online: Infrared Efficiency and Ultraviolet Management of Red-Pigmented Polymethylmethacrylate Photoselective Greenhouse Films.

    Alwadai, Norah / El-Bashir, Samah

    Polymers

    2022  Volume 14, Issue 3

    Abstract: Red-pigmented photoselective polymethylmethacrylate (PMMA) films were prepared by casting from polymer/chloroform solution. The films were doped with efficient red fluorescent perylene dyes specialized for plastic coloration, namely KREMER 94720 and ... ...

    Abstract Red-pigmented photoselective polymethylmethacrylate (PMMA) films were prepared by casting from polymer/chloroform solution. The films were doped with efficient red fluorescent perylene dyes specialized for plastic coloration, namely KREMER 94720 and KREMER 94739, which have excellent weathering stability and a high fluorescence quantum yield. The effect of the doping concentration was studied using the atomic force microscope (AFM), optical transmission, color measurement, time-resolved fluorescence, and Fourier transform infrared spectroscopy (FTIR). The obtained results suggested the potential usefulness for photoselective greenhouse cladding applications as the lowest doping concentration (10
    Language English
    Publishing date 2022-01-28
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym14030531
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: NiO/MnFe

    Amjad, Muhammad / Bibi, Ismat / Majid, Farzana / Jilani, Kashif / Sultan, Misbah / Raza, Qasim / Ghafoor, Aamir / Alwadai, Norah / Nazir, Arif / Iqbal, Munawar

    ACS omega

    2024  Volume 9, Issue 19, Page(s) 20876–20890

    Abstract: In this study, pure nickel oxide (NiO), manganese ferrite ( ... ...

    Abstract In this study, pure nickel oxide (NiO), manganese ferrite (MnFe
    Language English
    Publishing date 2024-05-05
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c09637
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Machine Learning Assisted Prediction of Power Conversion Efficiency of All-Small Molecule Organic Solar Cells: A Data Visualization and Statistical Analysis.

    Alwadai, Norah / Khan, Salah Ud-Din / Elqahtani, Zainab Mufarreh / Ud-Din Khan, Shahab

    Molecules (Basel, Switzerland)

    2022  Volume 27, Issue 18

    Abstract: Organic solar cells are famous for their cheap solution processing. Their industrialization needs fast designing of efficient materials. For this purpose, testing of large number of materials is necessary. Machine learning is a better option due to ... ...

    Abstract Organic solar cells are famous for their cheap solution processing. Their industrialization needs fast designing of efficient materials. For this purpose, testing of large number of materials is necessary. Machine learning is a better option due to cheaper prediction of power conversion efficiencies. In the present work, machine learning was used to predict power conversion efficiencies. Experimental data were collected from the literature to feed the machine learning models. A detailed data visualization analysis was performed to study the trends of the dataset. The relationship between descriptors and power conversion efficiency was quantitatively determined by Pearson correlations. The importance of features was also determined using feature importance analysis. More than 10 machine learning models were tried to find better models. Only the two best models (random forest regressor and bagging regressor) were selected for further analysis. The prediction ability of these models was high. The coefficient of determination (R2) values for the random forest regressor and bagging regressor models were 0.892 and 0.887, respectively. The Shapley additive explanation (SHAP) method was used to identify the impact of descriptors on the output of models.
    MeSH term(s) Data Visualization ; Machine Learning ; Research Design
    Language English
    Publishing date 2022-09-11
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1413402-0
    ISSN 1420-3049 ; 1431-5165 ; 1420-3049
    ISSN (online) 1420-3049
    ISSN 1431-5165 ; 1420-3049
    DOI 10.3390/molecules27185905
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.MO 81: Show issues

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  4. Article: Photonics with Gallium Nitride Nanowires.

    Alwadai, Norah / Saleman, Nigza / Elqahtani, Zainab Mufarreh / Khan, Salah Ud-Din / Majid, Abdul

    Materials (Basel, Switzerland)

    2022  Volume 15, Issue 13

    Abstract: The surface plasmon resonance in low-dimensional semiconducting materials is a source of valuable scientific phenomenon which opens widespread prospects for novel applications. A systematic study to shed light on the propagation of plasmons at the ... ...

    Abstract The surface plasmon resonance in low-dimensional semiconducting materials is a source of valuable scientific phenomenon which opens widespread prospects for novel applications. A systematic study to shed light on the propagation of plasmons at the interface of GaN nanowire is reported. A comprehensive analysis of the interaction of light with GaN nanowires and the propagation of plasmons is carried out to uncover further potentials of the material. The results obtained on the basis of calculations designate the interaction of light with nanowires, which produced plasmons at the interface that propagate along the designed geometry starting from the center of the nanowire towards its periphery, having more flux density at the center of the nanowire. The wavelength of light does not affect the propagation of plasmons but the flux density of plasmons appeared to increase with the wavelength. Similarly, an increment in the flux density of plasmons occurs even in the case of coupled and uncoupled nanowires with wavelength, but more increment occurs in the case of coupling. Further, it was found that an increase in the number of nanowires increases the flux density of plasmons at all wavelengths irrespective of uniformity in the propagation of plasmons. The findings point to the possibility of tuning the plasmonics by using a suitable number of coupled nanowires in assembly.
    Language English
    Publishing date 2022-06-24
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma15134449
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: An efficient antenna system with improved radiation for multi-standard/multi-mode 5G cellular communications.

    Parchin, Naser Ojaroudi / Mohamed, Heba G / Moussa, Karim H / See, Chan Hwang / Abd-Alhameed, Raed A / Alwadai, Norah Muhammad / Amar, Ahmed S I

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 4179

    Abstract: This paper introduces a multi-input multiple-output (MIMO) antenna array system that provides improved radiation diversity for multi-standard/multi-mode 5G communications. The introduced MIMO design contains four pairs of miniaturized self-complementary ... ...

    Abstract This paper introduces a multi-input multiple-output (MIMO) antenna array system that provides improved radiation diversity for multi-standard/multi-mode 5G communications. The introduced MIMO design contains four pairs of miniaturized self-complementary antennas (SCAs) fed by pairs of independently coupled structures which are symmetrically located at the edge corners of the smartphone mainboard with an overall size of 75 × 150 (mm
    Language English
    Publishing date 2023-03-13
    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/s41598-023-31407-z
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Publisher Correction: An efficient antenna system with improved radiation for multi-standard/multi-mode 5G cellular communications.

    Parchin, Naser Ojaroudi / Mohamed, Heba G / Moussa, Karim H / See, Chan Hwang / Abd-Alhameed, Raed A / Alwadai, Norah Muhammad / Amar, Ahmed S I

    Scientific reports

    2023  Volume 13, Issue 1, Page(s) 5298

    Language English
    Publishing date 2023-03-31
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-023-32420-y
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Fabrication of Efficient Electrocatalysts for Electrochemical Water Oxidation Using Bimetallic Oxides System.

    Ali, Abid / Najaf, Dure / Nazir, Arif / Haider, Ali / Iqbal, Munawar / Alwadai, Norah / Kausar, Abida / Ahmad, Azhar

    ACS omega

    2023  Volume 8, Issue 10, Page(s) 9539–9546

    Abstract: The study focused on the fabrication of nickel, cobalt, and their bimetallic oxide via a facile electrodeposition approach over the surface of conducting glass has been reported here. Fabricated electrodes have been employed as binder-free and effective ... ...

    Abstract The study focused on the fabrication of nickel, cobalt, and their bimetallic oxide via a facile electrodeposition approach over the surface of conducting glass has been reported here. Fabricated electrodes have been employed as binder-free and effective anode materials toward oxygen evolution reactions (OER) in electrochemical water splitting at high pH. Nickel and cobalt oxides showed overpotential values of 520 mV and 536 mV at the current density of 10 mAcm
    Language English
    Publishing date 2023-03-03
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.2c08288
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Synthesis of Oval-Shaped Bi

    Fatima, Shumaila / Iqbal, Mahwish / Bhatti, Haq Nawaz / Iqbal, Munawar / Alwadai, Norah / Al Huwayz, Maryam / Nazir, Arif

    ACS omega

    2023  Volume 8, Issue 34, Page(s) 30868–30878

    Abstract: The present study was designed to synthesize an oval-shaped bimetallic bismuth aluminate ( ... ...

    Abstract The present study was designed to synthesize an oval-shaped bimetallic bismuth aluminate (Bi
    Language English
    Publishing date 2023-08-18
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.3c01245
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Enhanced Photoresponsivity UV-C Photodetectors Using a p-n Junction Based on Ultra-Wide-Band Gap Sn-Doped β-Ga

    Alwadai, Norah / Alharbi, Zohoor / Alreshidi, Fatimah / Mitra, Somak / Xin, Bin / Alamoudi, Hadeel / Upadhyaya, Kishor / Hedhili, Mohamed N / Roqan, Iman S

    ACS applied materials & interfaces

    2023  Volume 15, Issue 9, Page(s) 12127–12136

    Abstract: Solar-blind self-powered UV-C photodetectors suffer from low performance, while heterostructure-based devices require complex fabrication and lack p-type wide band gap semiconductors (WBGSs) operating in the UV-C region (<290 nm). In this work, we ... ...

    Abstract Solar-blind self-powered UV-C photodetectors suffer from low performance, while heterostructure-based devices require complex fabrication and lack p-type wide band gap semiconductors (WBGSs) operating in the UV-C region (<290 nm). In this work, we mitigate the aforementioned issues by demonstrating a facile fabrication process for a high-responsivity solar-blind self-powered UV-C photodetector based on a p-n WBGS heterojunction structure, operating under ambient conditions. Here, heterojunction structures based on p-type and n-type ultra-wide band gap WBGSs (i.e. both are characterized by energy gap ≥4.5 eV) are demonstrated for the first time; mainly p-type solution-processed manganese oxide quantum dots (MnO QDs) and n-type Sn-doped β-Ga
    Language English
    Publishing date 2023-02-21
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.2c18900
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Enhanced Photoresponsivity UV‑C Photodetectors Using a p-n Junction Based on Ultra-Wide-Band Gap Sn-Doped β‑Ga₂O₃ Microflake/MnO Quantum Dots

    Alwadai, Norah / Alharbi, Zohoor / Alreshidi, Fatimah / Mitra, Somak / Xin, Bin / Alamoudi, Hadeel / Upadhyaya, Kishor / Hedhili, Mohamed N. / Roqan, Iman S.

    ACS Applied Materials & Interfaces. 2023 Feb. 21, v. 15, no. 9 p.12127-12136

    2023  

    Abstract: Solar-blind self-powered UV-C photodetectors suffer from low performance, while heterostructure-based devices require complex fabrication and lack p-type wide band gap semiconductors (WBGSs) operating in the UV-C region (<290 nm). In this work, we ... ...

    Abstract Solar-blind self-powered UV-C photodetectors suffer from low performance, while heterostructure-based devices require complex fabrication and lack p-type wide band gap semiconductors (WBGSs) operating in the UV-C region (<290 nm). In this work, we mitigate the aforementioned issues by demonstrating a facile fabrication process for a high-responsivity solar-blind self-powered UV-C photodetector based on a p-n WBGS heterojunction structure, operating under ambient conditions. Here, heterojunction structures based on p-type and n-type ultra-wide band gap WBGSs (i.e. both are characterized by energy gap ≥4.5 eV) are demonstrated for the first time; mainly p-type solution-processed manganese oxide quantum dots (MnO QDs) and n-type Sn-doped β-Ga₂O₃ microflakes. Highly crystalline p-type MnO QDs are synthesized using cost-effective and facile pulsed femtosecond laser ablation in ethanol (FLAL), while the n-type Ga₂O₃ microflakes are prepared by exfoliation. The solution-processed QDs are uniformly dropcasted on the exfoliated Sn-doped β-Ga₂O₃ microflakes to fabricate a p-n heterojunction photodetector, resulting in excellent solar-blind UV-C photoresponse characteristics (with a cutoff at ∼265 nm) being demonstrated. Further analyses using XPS demonstrate the good band alignment between p-type MnO QDs and n-type β-Ga₂O₃ microflakes with a type-II heterojunction. Superior photoresponsivity (922 A/W) is obtained under bias, while the self-powered responsivity is ∼86.9 mA/W. The fabrication strategy adopted in this study will provide a cost-effective means for the development of flexible and highly efficient UV-C devices suitable for energy-saving large-scale fixable applications.
    Keywords cost effectiveness ; energy ; energy conservation ; ethanol ; manganese monoxide ; quantum dots ; Ga2O3 nanoflake ; heterojunction ; deep UV detection ; p-type wide bandgap semiconductor ; photodiode ; visible-blind
    Language English
    Dates of publication 2023-0221
    Size p. 12127-12136.
    Publishing place American Chemical Society
    Document type Article ; Online
    ISSN 1944-8252
    DOI 10.1021/acsami.2c18900
    Database NAL-Catalogue (AGRICOLA)

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