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DTSTART;TZID="Pacific Time (US & Canada)":20210305T161000
DTEND;TZID="Pacific Time (US & Canada)":20210305T170000
SUMMARY:Department of Chemistry-Physical Chemistry Seminar
LOCATION:Online
DESCRIPTION:Physical Chemistry Seminar - Zoom Only\n\nSohan Ahmed  (Yoo Group)\n\nTitle: Dynamics of the melting and phase transition of nitrogen\n\nAbstract: Nitrogen is an interesting material exhibiting molecular and polymer like behavior as well as melt maximum at high temperatures. At very high pressure, nitrogen forms an amorphous phase with a nonmolecular semiconductor characteristics. Studies of the high temperature and high pressure melt of nitrogen by Raman and Synchrotron x-ray diffraction are reviewed. Raman study of the nitrogen melt is reviewed from a pressure range of 25 GPa to 103 GPa and temperature from 300 to 2000 K. The solid-liquid phase boundary has been probed with a time resolved Raman spectroscopy on ramp heated nitrogen in Diamond Anvil Cell (DAC). The solid-solid phase boundaries have been measured with spatially resolved micro-confocal Raman spectroscopy on resistively heated DAC, probing the δ-ε phase line. Synchrotron x-ray diffraction measurements of nitrogen are reviewed up to 120 GPa to determine the melting curve and the\n\nstructural changes of the solid and liquid phases along it. Also, a first order liquid-liquid phase transition above 50 GPa is reviewed. Based on these reviews a research goal is hypothesized.\n\nZoom Info:\n\nhttps://wsu.zoom.us/j/93809153065?pwd=eHBWd28yYnVDQTVXVzdHQ0xGNEdEdz09\n\n Meeting ID: 938 0915 3065\n\nPasscode: 8j089e\n\n\n\n 
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