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Structure modulation induced enhancement of microwave absorption in WS2 nanosheets.
- Source :
- Applied Physics Letters; 12/10/2018, Vol. 113 Issue 24, pN.PAG-N.PAG, 5p, 1 Diagram, 1 Chart, 3 Graphs
- Publication Year :
- 2018
-
Abstract
- This work reports the structural phase manipulation and the enhancement of microwave absorption in WS<subscript>2</subscript> nanosheets. Large-scale WS<subscript>2</subscript> nanosheets (1T@2H WS<subscript>2</subscript>) containing mixed 2H and 1T phases were synthesized by a simple hydrothermal process. The structural characteristics and concentration (∼60%) of the 1T phase in 1T@2H WS<subscript>2</subscript> nanosheets were identified by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. With the emergence of the 1T phase, the permittivity of 1T@2H WS<subscript>2</subscript> is more than three times higher than that of WS<subscript>2</subscript> with a pure 2H phase (2H WS<subscript>2</subscript>). Moreover, the microwave absorption properties were remarkably enhanced due to the emergence of the 1T phase. Contrary to 2H WS<subscript>2</subscript>, in which microwave reflection loss (R<subscript>L</subscript>) is close to zero, the R<subscript>L</subscript> for 1T@2H WS<subscript>2</subscript> can reach −47 dB with an effective bandwidth (<−10 dB) of 5.2 GHz. In addition, with the adjustment of the thickness of the absorber layer from 1.5 to 5 mm, 1T@2H WS<subscript>2</subscript> can achieve strong absorption in a wide band from 4 to 18 GHz. This finding provides an effective strategy for designing and synthesizing the microwave absorption materials. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 113
- Issue :
- 24
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 133580807
- Full Text :
- https://doi.org/10.1063/1.5054636