Raman spectroscopy of sulfur, sulfur-selenium, and sulfur-arsenic mixtures

Ward, A. T.

doi:10.1021/j100858a031

Cited by 312 publications

(198 citation statements)

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“…The mode at 490 cm -1 corresponds to S S  vibrations possibly in S 8 rings [38][39][40][41][42] or rather in covalent S 2 groups (S -S disulfide bonds) [34,43]. The very weak mode at 205 cm -1 is in accordance with the ab-initio calculated Raman peak at 211 and 212 cm -1 for SGe 3 -S 6/3 cluster in g-GeS 2 [44].…”

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confidence: 68%

Radiation-induced structural changes in chalcogenide glasses as revealed from Raman spectroscopy measurements

Kavetskyy¹

2013

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Radiation-induced structural changes in the chalcogenide glasses of (As 2 S 3 ) x (GeS 2 ) 1-x system with x = 0.1, 0.2, 0.4, and 0.6 corresponding to the chemical compositions Ge 28.125 As 6.25 S 65.625 , Ge 23.5 As 11.8 S 64.7 , Ge 15.8 As 21 S 63.2 , and Ge 9.5 As 28.6 S 61.9 , respectively, were studied using the Raman spectroscopy technique in detail. The polarized (VV) and depolarized (VH) Raman spectra were recorded separately for two identical samples in the unirradiated and γ-irradiated states which allowed performing all measurements under the same experimental conditions. The Raman spectra were considered in the regions of high-frequency excitations related with the molecular peak, and low-frequency excitations related with the boson peak. The depolarization ratio spectra for the unirradiated and -irradiated samples were examined, too. The differential Raman spectra in the high-frequency region between unirradiated and -irradiated samples were obtained only in the VH configuration, since no spectral variations in the VV configuration were detected for all the compositions studied. Employing the differential representation ( I) and unirradiated ( R unirrad. I) samples, it has been found out that the radiation-induced structural changes are significant only for the glass composition with x = 0.4, while these changes are practically absent in the case of the glass compositions with x = 0.1, 0.2, and 0.6. The applied differential procedure allows also to detect the radiation-induced effects in clusters of corner-shared and edge-shared tetrahedral, which was not possible with IR Fast Fourier Transform spectroscopy due to different activity of IR and Raman bands. In addition, it was shown that the controversial companion c A 1 mode at 370 cm -1 to the main 340 cm -1 A 1 symmetric mode of vibrations in cornershared tetrahedra seems to be related mainly to the vibrations of edge-shared tetrahedra. The possible nanoscale structural mechanism to account for these spectral changes has been discussed.

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confidence: 68%

Radiation-induced structural changes in chalcogenide glasses as revealed from Raman spectroscopy measurements

Kavetskyy¹

2013

Semicond. Phys. Quantum Electron. Optoelectron.

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“…2). The peaks at 193, 232, 330-340 and 493 cm −1 are assigned to various As-S vibrational modes and specifically, the broad peak centered at 340 cm −1 strongly indicates an amorphous arsenic sulfide, or artificial orpiment (g-As 2 S 3 or g-As x S x ) [24][25][26][27][28]. The peak centered at 471 cm −1 is characteristic of free sulfur.…”

Section: Resultsmentioning

confidence: 99%

Natural and synthetic arsenic sulfide pigments in Japanese woodblock prints of the late Edo period

2018

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We recently described the use of an artificial arsenic sulfide pigment in Japanese woodblock prints from the Meiji period : we now expand on our previous work by investigating arsenic sulfide pigments used in Japanese woodblock prints of the late Edo period (1615-1868) and early Meiji period. The series of eight prints A Tour of the Waterfalls in Various Provinces (Shokoku Taki Meguri), by Katsushika Hokusai, issued between 1833 and 1834 is known to have been reproduced from entirely new blocks at some point during the late Edo or early Meiji periods. The two sets, original and copies are characterized by visually distinct color palettes as well as several differences in the image. Two such sets in the collection of the Metropolitan Museum of Art were analyzed with particular attention to the yellow, orange, and green printed areas. X-ray fluorescence spectrometry, Raman microspectroscopy, and scanning electron microscopy-energy dispersive spectroscopy revealed the use of natural orpiment in the original set and of artificial arsenic sulfide pigments in the reproduction set. In addition, the reproduction set features extensive use of ultramarine blue, the synthetic equivalent to lapis lazuli. This pigment, available commercially in Europe from 1830 onward has been documented in Japanese art so far only in a handful of late Edo period paintings. The results of our comparative analysis further highlight differences in pigment use between Edo and Meiji periods, and point to arsenic sulfide pigments as useful markers for the date of original production for popular prints of the Edo period.

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“…4b. Sulfur shows a series of typical Raman peaks which can be assigned to the S-S bond [32], however, such typical sulfur peaks disappeared in the OMCF-S, indicating that sulfur is successfully embedded into the pores of the OMCF.…”

Section: Resultsmentioning

confidence: 99%

Large-scale synthesis of ordered mesoporous carbon fiber and its application as cathode material for lithium–sulfur batteries

Wang

Zhang

Chen

et al. 2015

Carbon

171

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Guo, Z. (2015). Large-scale synthesis of ordered mesoporous carbon fiber and its application as cathode material for lithium-sulfur batteries. Carbon, 81 782-787.Large-scale synthesis of ordered mesoporous carbon fiber and its application as cathode material for lithium-sulfur batteries AbstractA novel type of one-dimensional ordered mesoporous carbon fiber has been prepared via the electrospinning technique by using resol as the carbon source and triblock copolymer Pluronic F127 as the template. Sulfur is then encapsulated in this ordered mesoporous carbon fibers by a simple thermal treatment. The interwoven fibrous nanostructure has favorably mechanical stability and can provide an effective conductive network for sulfur and polysulfides during cycling. The ordered mesopores can also restrain the diffusion of long-chain polysulfides. The resulting ordered mesoporous carbon fiber sulfur (OMCF-S) composite with 63% S exhibits high reversible capacity, good capacity retention and enhanced rate capacity when used as cathode in rechargeable lithium-sulfur batteries. The resulting OMCF-S electrode maintains a stable discharge capacity of 690 mAh/g at 0.3 C, even after 300 cycles. ABSTRACT:A novel type of one-dimensional ordered mesoporous carbon fiber has been prepared via the electrospinning technique by using resol as the carbon source and triblock copolymer Pluronic F127 as the template. Sulfur is then encapsulated in this ordered mesoporous carbon fibers by a simple thermal treatment. The interwoven fibrous nanostructure has favorably mechanical stability and can provide an effective conductive network for sulfur and polysulfides during cycling. The ordered mesopores can also restrain the diffusion of long-chain polysulfides. The resulting ordered mesoporous carbon fiber sulfur (OMCF-S) composite with 63% S exhibits high reversible capacity, good capacity retention and enhanced rate capacity when used as cathode in rechargeable lithium-sulfur batteries. The resulting OMCF-S electrode maintains a stable discharge capacity of 690 mAh/g at 0.3 C, even after 300 cycles.

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Raman spectroscopy of sulfur, sulfur-selenium, and sulfur-arsenic mixtures

Cited by 312 publications

References 2 publications

Radiation-induced structural changes in chalcogenide glasses as revealed from Raman spectroscopy measurements

Radiation-induced structural changes in chalcogenide glasses as revealed from Raman spectroscopy measurements

Natural and synthetic arsenic sulfide pigments in Japanese woodblock prints of the late Edo period

Large-scale synthesis of ordered mesoporous carbon fiber and its application as cathode material for lithium–sulfur batteries

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