Conference proceeding
Two-dimensional Niobium Carbide MXene, Nb2CTx: intrinsic and photoexcited carrier dynamics
2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), pp 1-2
17 Sep 2023
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Garnering attention for high conductivity, nonlinear optical properties, and more, MXenes are water-processable 2D materials that are considered candidates for applications in electromagnetic interference shielding, optoelectronic and photonic devices among others. Herein we investigate the intrinsic and photoexcited conductivity in Nb 2 CT x , a MXene with reported high photothermal conversion efficiency. DFT calculations show that hydroxyl and/or fluorine-terminated \mathrm{Nb}_{2} \mathrm{CT}_{x}\left(\mathrm{~T}_{x}=\mathrm{OH}\right. or \left.\mathrm{F}\right) is metallic, in agreement with THz spectroscopy, which reveals the presence of free charge carriers that are highly localized over mesoscopic length scales. Photoexcitation of Nb 2 CT x , known to result in rapid heating of the crystal lattice, is found to produce additional free carriers and a transient enhancement of photoconductivity. Most photoexcited carriers decay over the sub-picosecond time scales while a small fraction remain for much longer, sub-nanoseconds, times.
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Details
- Title
- Two-dimensional Niobium Carbide MXene, Nb2CTx: intrinsic and photoexcited carrier dynamics
- Creators
- Andrew M. Fitzgerald - Worcester Polytechnic InstituteKateryna Kushnir - Worcester Polytechnic InstituteEmily Sutherland - Worcester Polytechnic InstituteErika Colin-Ulloa - Worcester Polytechnic InstituteTarek Ali El-Melegy - Drexel UniversityMary Qin Hassig - Drexel UniversityJulia Martin - Worcester Polytechnic InstituteKen Ngo - United States ArmyRonald L. Grimm - Worcester Polytechnic InstituteJoshua R. Uzarski - United States ArmyMichel W. Barsoum - Drexel UniversityN. Aaron Deskins - Worcester Polytechnic InstituteLyubov V. Titova - Worcester Polytechnic Institute
- Publication Details
- 2023 48th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), pp 1-2
- Publisher
- IEEE
- Grant note
- Arm (10.13039/100016311)
- Resource Type
- Conference proceeding
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001098999800074
- Scopus ID
- 2-s2.0-85177661361
- Other Identifier
- 991021811637204721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Electrical & Electronic
- Physics, Applied