Type
ArticleAuthors
Velusamy, DhineshEl Demellawi, Jehad K.
El-Zohry, Ahmed
Giugni, Andrea
Lopatin, Sergei
Hedhili, Mohamed N.

Mansour, Ahmed

Di Fabrizio, Enzo M.

Mohammed, Omar F.

Alshareef, Husam N.

KAUST Department
Chemical ScienceChemical 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
2019-06-20Embargo End Date
2020-06-20Permanent link to this record
http://hdl.handle.net/10754/656020
Metadata
Show full item recordAbstract
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.201807658Sponsors
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
WileyJournal
Advanced MaterialsAdditional Links
https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201807658ae974a485f413a2113503eed53cd6c53
10.1002/adma.201807658