High pressure raman spectra of crystalline sulfur

Structural properties of Sb2S3 under pressure: evidence of an electronic topological transition

“…S1 ]. Since the strongest Raman features of elemental Sb 24 and S 25 26 27 do not reside in these frequencies, we can safely exclude any decomposition and attribute the appearance of the M1 and M2 features to a pressure-induced phase transition. The M2 feature was also detected in the study of Sorb et al .…”

High Pressure Investigation of the S–N2System up to the Megabar Range: Synthesis and Characterization of the SN2Solid

“…In particular, it is expected that other modes are present at lower frequencies but are too much overlapped by those of pure molecular nitrogen and sulfur to be observed. [77][78][79] An insightful comparison of the Raman modes of SN2 to those of isostructural, isoelectronic and isomassic CaCl2-type SiO2 can be done. Within the frequency range of the SN2 vibrational data (i.e.…”

“…Here, between 42.3 and 105.2 GPa, two modes at frequencies of 789 and 1070 cm –1 at 61.7 GPa (see Figure ) were sufficiently intense to be detected, with the former being weaker than the latter. In particular, it is expected that other modes are present at lower frequencies but are too much overlapped by those of pure molecular nitrogen and sulfur to be observed. − An insightful comparison of the Raman modes of SN 2 to those of isostructural, isoelectronic, and isomassic CaCl 2 -type SiO 2 can be done. Within the frequency range of the SN 2 vibrational data (i.e., > 250 cm –1 ), three modes are detected in CaCl 2 -type SiO 2 : the A g (924 cm –1 ), B 3g (702 cm –1 ), and B 2g (690 cm –1 ) at 61 GPa .…”

“…(a) Selected Raman spectra obtained from a laser-heated S and N 2 sample. The asterisks mark the vibrational modes of SN 2 , while the nonidentified, low frequency peaks belong to pure N 2 and pure S. − The spectra were vertically offsetted for clarity. (b) Pressure evolution of the Raman modes of SN 2 .…”

Pressure and Photoinduced Phase Transitions of Elemental Sulfur Confined by Open-End Single-Wall Carbon Nanohorns

“…In addition, the stoichiometric ratio, sulfur content, and structural configuration of C–S bonds in such a binary system may also lead to varying structural properties according to theoretical studies. , Raman spectroscopy is also a powerful tool to investigate phase transitions of sulfur under pressure. However, the interpretations of Raman results have not yet reached a consensus and are even self-contradictory, due to strong photothermal-induced phenomena that take place during light exposure and excitation. − Some Raman investigations tentatively concluded a photoinduced transition sequence as follows: α-S 8 → first photoinduced amorphous phase (a-S) → second photoinduced phase (p-S) → S 6 , and the determination of phase diagram is closely dependent on pressure, laser energy, and power density. − On the other hand, nanocarbon/sulfur hybrids have been the subject of intensive research efforts in fields such as nanoenergy engineering . To obtain more insights into the confinement effect on filled molecules encapsulated in nanospaces of CNHs, as well as into the pressure-induced phase transition and photothermal behavior of nanocarbon/sulfur hybrids, S@SWCNHs are designed and are measured using X-ray diffraction and Raman spectroscopy upon cold compression.…”