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VERSION:2.0
PRODID:-//RLASKEY//CALENDEROUS//EN
CALSCALE:GREGORIAN
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BEGIN:VEVENT
DTSTAMP:20261026T080009Z
LAST-MODIFIED:20140616T200307Z
DTSTART:20140709T150000Z
DTEND:20140709T160000Z
UID:event1296@bu.edu
URL:http://physics.bu.edu/internal/events/show/1296
SUMMARY:Liquid-Liquid Phase Transitions and Water-Like Anomalies in Liquids
DESCRIPTION:Featuring Erik Lascaris\n\nPart of the PhD Final Oral Exams.\n\
	nExamining Committee:  H.E. Stanley\, William Skocpol\, Shyam Erramilli\, K
	arl Ludwig\, Robert Carey\n\n![Lascaris](/resources/event-image/1296/318645
	c_small)\n\nABSTRACT:\nOf the three classical states of matter\, the liquid
	 state seems to be the most challenging phase to characterize.  It exhibits
	 neither the long-range order of the crystalline state nor the complete dis
	order of the gaseous state.  Located between gas and solid in the phase dia
	gram\, it is no surprise that the physics of liquids is a rich field full o
	f interesting phenomena.\n\nAmong liquids\, water is particularly fascinati
	ng.  It is the most common liquid on the surface of the Earth\, it makes up
	 over 50% of the human body\, and many important chemical and biological pr
	ocesses occur within its aquatic environment.  H2O is one of the simplest m
	olecules\, yet it condenses into an unusually complex liquid.  Compared wit
	h other liquids\, water has many anomalies\, e.g.\, its liquid form has a h
	igher density than its solid form\, when the liquid is cooled below 4 C the
	 density decreases rather than increases\, and when the pressure is increas
	ed its self-diffusion increases rather than decreases.\n\nCooling liquid wa
	ter to below its melting temperature under certain experimental conditions 
	produces metastable supercooled liquid water. In this state the anomalies b
	ecome even more distinct.  For example\, there is a steep increase in both 
	the heat capacity and the compressibility when supercooled liquid water is 
	cooled to approximately --40 C.  Although many water anomalies can be expla
	ined with reference to its hydrogen bonds\, this steep increase suggests an
	 interesting possibility: the existence of two distinct liquid phases\, sep
	arated by a first-order-like liquid-liquid phase transition (LLPT) that end
	s in a critical point.\n\nWater-like anomalies and LLPTs are by no means li
	mited to water\, however.  Other tetrahedral liquids\, such as silica\, sha
	re several of these anomalies and may also have a LLPT.  We study the gener
	al mechanism that lies behind these anomalies\, and investigate a possible 
	link with LLPTs.  In addition we consider various methods to prove or dispr
	ove the existence of a LLPT\, and discuss possible methods of predicting th
	e existence of a LLPT based on data at temperatures above the critical temp
	erature.
LOCATION:SCI 352\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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