Electronic structure of layer type tungsten metal dichalcogenides WX2 (X=S, Se) using Compton spectroscopy: Theory and experiment

Arora, Gunjan; Sharma, Yog Raj; Sharma, Vinit; Ahmed, Gulzar; Srivastava, S. K.; Ahuja, B.L.

doi:10.1016/j.jallcom.2008.02.098

Cited by 35 publications

(17 citation statements)

References 31 publications

(43 reference statements)

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“…The series of features 1 – 5 correspond to W 5d and S 3p states, which show strong hybridization . At the same time, feature 6 corresponds mainly to the S 3s states . According to some calculations, feature 1 that forms the VBM, contains a stronger contribution of W 5d states .…”

Section: Resultsmentioning

confidence: 99%

“…At the same time, feature 6 corresponds mainly to the S 3s states . According to some calculations, feature 1 that forms the VBM, contains a stronger contribution of W 5d states . This is in agreement with the general proposition that VBM and the conduction band minimum (CBM) states are formed by metal d‐states .…”

Section: Resultsmentioning

confidence: 99%

“…[63,64] According to some calculations,f eature 1 that forms the VBM,c ontains as tronger con-tributionofW5d states. [63] This is in agreement with the general proposition that VBM and the conduction band minimum (CBM) states are formedb ym etal d-states. [65,66] It can be then expected that the width of such an "intra-atomic"b and gap would be less sensitivet ot he changes of the chalcogens tates, for example, So xidation or bondingt ot he other atoms.…”

Section: Nt-wsmentioning

confidence: 99%

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Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS₂ Nanotubes

Polyakov

Козлов

Лебедев

et al. 2018

Chemistry A European J

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Composites of WS2 nanotubes (NT‐WS2) and gold nanoparticles (AuNPs) were prepared using aqueous HAuCl4 solutions and subjected to surface analysis. The obtained materials were jointly characterized by X‐ray photoelectron (XPS), Raman scattering (RSS), and ultraviolet photoelectron (UPS) spectroscopies. Optical extinction spectroscopy and electron energy loss spectroscopy in the scanning transmission electron microscopy regime (STEM‐EELS) were also employed to study plasmon features of the nanocomposite. It was found that AuNPs deposition is accompanied by a partial oxidative dissolution of WS2, whereas Au‐S interfacial species could be responsible for the tight contact of metal nanoparticles and the disulfide. A remarkable sensitivity of n‐type resistance of NT‐WS2 and Au‐NT‐WS2 to the adsorption of NO2 gas was also demonstrated at room temperature using periodical illumination by a 530 nm light‐emitting diode. Au‐NT‐WS2 nanocomposites are found to possess a higher photoresponse and enhanced sensitivity in the 0.25–2.0 ppm range of NO2 concentration, as compared to the pristine NT‐WS2. This behaviour is discussed within the physisorption‐charge transfer model to explore sensing properties of the nanocomposites.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Nt-wsmentioning

confidence: 99%

See 1 more Smart Citation

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS₂ Nanotubes

Polyakov

Козлов

Лебедев

et al. 2018

Chemistry A European J

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“…The p F value of ZnWO 4 (CdWO 4 ) were taken to be 1.42 (1.34) a.u. Such method has been successfully applied to study the relative nature of bonding in different systems as reported by Reed and Eisenberger (1972), Heda et al (2007), Arora et al (2009), Ahuja et al (2013Ahuja et al ( , 2015, and Bhamu et al (2013). In Fig.…”

Section: Eved Profilesmentioning

confidence: 99%

Compton profiles and electronic structure of monoclinic zinc and cadmium tungstates

Meena

Heda

Mund

et al. 2015

Radiation Physics and Chemistry

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“…[2][3][4][5] For example, monolayer MoX 2 and WX 2 (X ¼ S, Se, Te) are direct band gap semiconductors, which are suitable for optoelectronic applications and devices for energy harvesting. [7][8][9][10][11][12][13][14][15][16] The band gaps of these TMD nanosheets can be tailored either by vertical electric field 6 or by trimming monolayer MoS 2 into micro and nanoribbons by electrochemical methods, 17 and ab initio calculations have demonstrated the stability of MoS 2 nanoribbons with disparate magnetic and electronic properties corresponding to different edge-atom structures. [18][19][20] Moreover, MoS 2 nanoribbons have been proposed as promising cathode materials for Li-ion batteries due to the high power densities and fast charge/discharge rates.…”

Section: Metal To Semiconductor Transition In Metallic Transition Metmentioning

confidence: 99%

Metal to semiconductor transition in metallic transition metal dichalcogenides

Tongay

Kang

et al. 2013

Journal of Applied Physics

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Stability, structural, and magnetic phase diagrams of ternary ferromagnetic 3d-transition-metal clusters with five and six atoms J. Chem. Phys. 134, 054101 (2011); 10.1063/1.3533954 Thickness dependence of ferromagnetic-and metal-insulator transition in thin EuO filmsWe report on tuning the electronic and magnetic properties of metallic transition metal dichalcogenides (mTMDCs) by 2D to 1D size confinement. The stability of the mTMDC monolayers and nanoribbons is demonstrated by the larger binding energy compared to the experimentally available semiconducting TMDCs. The 2D MX 2 (M ¼ Nb, Ta; X ¼ S, Se) monolayers are non-ferromagnetic metals and mechanically softer compared to their semiconducting TMDCs counterparts. Interestingly, mTMDCs undergo metal-to-semiconductor transition when the ribbon width approaches to $13 Å and $7 Å for zigzag and armchair edge terminations, respectively; then these ribbons convert back to metal when the ribbon widths further decrease. Zigzag terminated nanoribbons are ferromagnetic semiconductors, and their magnetic properties can also be tuned by hydrogen edge passivation, whereas the armchair nanoribbons are non-ferromagnetic semiconductors. Our results display that the mTMDCs offer a broad range of physical properties spanning from metallic to semiconducting and non-ferromagnetic to ferromagnetic that is ideal for applications where stable narrow bandgap semiconductors with different magnetic properties are desired. V C 2013 AIP Publishing LLC. [http://dx.

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Electronic structure of layer type tungsten metal dichalcogenides WX2 (X=S, Se) using Compton spectroscopy: Theory and experiment

Cited by 35 publications

References 31 publications

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS₂ Nanotubes

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS₂ Nanotubes

Compton profiles and electronic structure of monoclinic zinc and cadmium tungstates

Metal to semiconductor transition in metallic transition metal dichalcogenides

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Electronic structure of layer type tungsten metal dichalcogenides WX2 (X=S, Se) using Compton spectroscopy: Theory and experiment

Cited by 35 publications

References 31 publications

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS2 Nanotubes

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS2 Nanotubes

Compton profiles and electronic structure of monoclinic zinc and cadmium tungstates

Metal to semiconductor transition in metallic transition metal dichalcogenides

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Product

Resources

About

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS₂ Nanotubes

Gold Decoration and Photoresistive Response to Nitrogen Dioxide of WS₂ Nanotubes