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    MXenes for Plasmonic Photodetection

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    Type
    Article
    Authors
    Velusamy, Dhinesh
    El Demellawi, Jehad K.
    El-Zohry, Ahmed
    Giugni, Andrea
    Lopatin, Sergei
    Hedhili, Mohamed N. cc
    Mansour, Ahmed cc
    Di Fabrizio, Enzo M. cc
    Mohammed, Omar F. cc
    Alshareef, Husam N. cc
    KAUST Department
    Chemical Science
    Chemical Science Program
    Electron Microscopy
    Functional Nanomaterials and Devices Research Group
    KAUST Catalysis Center
    KAUST Catalysis Center (KCC)
    KAUST Solar Center
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Physical Sciences and Engineering
    Surface Science
    Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
    Date
    2019-06-20
    Embargo End Date
    2020-06-20
    Permanent link to this record
    http://hdl.handle.net/10754/656020
    
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    Abstract
    MXenes have recently shown impressive optical and plasmonic properties associated with their ultrathin-atomic-layer structure. However, their potential use in photonic and plasmonic devices has been only marginally explored. Photodetectors made of five different MXenes are fabricated, among which molybdenum carbide MXene (Mo2CTx) exhibits the best performance. Mo2CTx MXene thin films deposited on paper substrates exhibit broad photoresponse in the range of 400–800 nm with high responsivity (up to 9 A W−1), detectivity (≈5 × 1011 Jones), and reliable photoswitching characteristics at a wavelength of 660 nm. Spatially resolved electron energy-loss spectroscopy and ultrafast femtosecond transient absorption spectroscopy of the MXene nanosheets reveal that the photoresponse of Mo2CTx is strongly dependent on its surface plasmon-assisted hot carriers. Additionally, Mo2CTx thin-film devices are shown to be relatively stable under ambient conditions, continuous illumination and mechanical stresses, illustrating their durable photodetection operation in the visible spectral range. Micro-Raman spectroscopy conducted on bare Mo2CTx film and on gold electrodes allowing for surface-enhanced Raman scattering demonstrates surface chemistry and a specific low-frequency band that is related to the vibrational modes of the single nanosheets. The specific ability to detect and excite individual surface plasmon modes provides a viable platform for various MXene-based optoelectronic applications.
    Citation
    Velusamy, D. B., El-Demellawi, J. K., El-Zohry, A. M., Giugni, A., Lopatin, S., Hedhili, M. N., … Alshareef, H. N. (2019). MXenes for Plasmonic Photodetection. Advanced Materials, 1807658. doi:10.1002/adma.201807658
    Sponsors
    D.B.V. and J.K.E. contributed equally to this work. Research reported in this publication was supported by the King Abdullah University of Science and Technology (KAUST). The authors thank Dr. Rajeshkumar Mohanaraman for his help in the MAX phase synthesis. The authors also thank Fangwang Ming for his help with the XRD measurements and Qui Jiang for several useful discussions.
    Publisher
    Wiley
    Journal
    Advanced Materials
    DOI
    10.1002/adma.201807658
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201807658
    ae974a485f413a2113503eed53cd6c53
    10.1002/adma.201807658
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Physical Science and Engineering (PSE) Division; Chemical Science Program; Chemical Science Program; Material Science and Engineering Program; Material Science and Engineering Program; KAUST Catalysis Center (KCC); KAUST Catalysis Center (KCC); KAUST Solar Center (KSC); KAUST Solar Center (KSC)

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