High-pressure Raman spectroscopy of phase change materials
نویسندگان
چکیده
منابع مشابه
Raman scattering study of InAs nanowires under high pressure.
The pressure-dependent phonon modes of InAs nanowires have been investigated by Raman spectroscopy under high pressure up to ∼58 GPa. X-ray diffraction measurements show that InAs nanowires at 21 GPa exhibit a phase transition from a wurtzite to an orthorhombic crystal structure, with a corresponding drastic change in the first-order Raman spectra. In the low-pressure regime, a linear increase ...
متن کاملRaman spectroscopic study of spodumene (LiAlSi2O6/ through the pressure-induced phase change from C2/c to P21/c
High-pressure Raman spectroscopy was used to follow the effects of a phase transition on the Raman spectrum of a natural specimen of the pyroxene spodumene, from its low-pressure (C2/c) to its highpressure (P21/c) phases. The transition occurred at 3.2 GPa and was accompanied by an increase from 15 to 23 observed peaks, owing to a decrease in symmetry. Comparisons were made with other pyroxenes...
متن کاملRaman and X-ray investigations of LiFeSi2O6 pyroxene under pressure
In situ Raman spectroscopy at high pressure was utilized to follow the phase transition of a synthetic sample of Li-aegerine pyroxene (LiFeSi2O6) from its low-pressure (C2/c) phase to its high-pressure (P21/c) phase. The phase change occurred between 0.7 and 1 GPa and was accompanied by a change in coordination of the Li atom from 4 to 5, which was confirmed by single-crystal X-ray diffraction....
متن کاملHigh pressure Raman spectroscopy of H2O-CH3OH mixtures
Complex intra-molecular interactions and the hydrogen-bonding network in H2O-volatile mixtures play critical roles in many dynamics processes in physical chemistry, biology, and Earth and planetary sciences. We used high pressure Raman spectroscopy to study the pressure evolution of vibrational frequencies and bonding behavior in H2O-CH3OH mixtures. We found that the presence of low CH3OH conte...
متن کاملAssessment of environmental high-doses using Raman spectroscopy of gamma irradiated MWCNT-OH Nanopowder utilized in radiation accidents
Introduction: The functionalized Multi-Walled Carbon Nanotube with hydroxyl group (MWCNT-OH) due to high aspect ratios (length to diameter), and also excellent mechanical, electrical and thermal characteristics, has great potential applications in flexible electronics, solar cells, antistatic devices, electromagnetic interference shielding, radiation shielding, electrode materi...
متن کامل