<html dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Windows-1252">
<style id="stndz-style"></style><style>
<!--
@font-face
        {font-family:Helvetica}
@font-face
        {font-family:"Cambria Math"}
@font-face
        {font-family:Cambria}
@font-face
        {font-family:Calibri}
@font-face
        {font-family:Tahoma}
@font-face
        {font-family:Consolas}
@font-face
        {font-family:"Liberation Serif"}
p.MsoNormal, li.MsoNormal, div.MsoNormal
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:12.0pt;
        font-family:"Times New Roman","serif"}
h2
        {margin-right:0in;
        margin-left:0in;
        font-size:18.0pt;
        font-family:"Times New Roman","serif";
        font-weight:bold}
a:link, span.MsoHyperlink
        {color:blue;
        text-decoration:underline}
a:visited, span.MsoHyperlinkFollowed
        {color:purple;
        text-decoration:underline}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:10.5pt;
        font-family:Consolas}
p
        {margin-right:0in;
        margin-left:0in;
        font-size:12.0pt;
        font-family:"Times New Roman","serif"}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:8.0pt;
        font-family:"Tahoma","sans-serif"}
p.MsoNoSpacing, li.MsoNoSpacing, div.MsoNoSpacing
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:12.0pt;
        font-family:"Times New Roman","serif"}
p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph
        {margin-top:0in;
        margin-right:0in;
        margin-bottom:10.0pt;
        margin-left:.5in;
        line-height:115%;
        font-size:11.0pt;
        font-family:"Calibri","sans-serif"}
p.MsoListParagraphCxSpFirst, li.MsoListParagraphCxSpFirst, div.MsoListParagraphCxSpFirst
        {margin-top:0in;
        margin-right:0in;
        margin-bottom:0in;
        margin-left:.5in;
        margin-bottom:.0001pt;
        line-height:115%;
        font-size:11.0pt;
        font-family:"Calibri","sans-serif"}
p.MsoListParagraphCxSpMiddle, li.MsoListParagraphCxSpMiddle, div.MsoListParagraphCxSpMiddle
        {margin-top:0in;
        margin-right:0in;
        margin-bottom:0in;
        margin-left:.5in;
        margin-bottom:.0001pt;
        line-height:115%;
        font-size:11.0pt;
        font-family:"Calibri","sans-serif"}
p.MsoListParagraphCxSpLast, li.MsoListParagraphCxSpLast, div.MsoListParagraphCxSpLast
        {margin-top:0in;
        margin-right:0in;
        margin-bottom:10.0pt;
        margin-left:.5in;
        line-height:115%;
        font-size:11.0pt;
        font-family:"Calibri","sans-serif"}
p.MsoIntenseQuote, li.MsoIntenseQuote, div.MsoIntenseQuote
        {margin-top:10.0pt;
        margin-right:.65in;
        margin-bottom:14.0pt;
        margin-left:.65in;
        font-size:12.0pt;
        font-family:"Times New Roman","serif";
        color:#4F81BD;
        font-weight:bold;
        font-style:italic}
span.MsoSubtleReference
        {font-variant:small-caps;
        color:#C0504D;
        text-decoration:underline}
span.MsoIntenseReference
        {font-variant:small-caps;
        color:#C0504D;
        letter-spacing:.25pt;
        font-weight:bold;
        text-decoration:underline}
span.Heading2Char
        {font-family:"Cambria","serif";
        color:#4F81BD;
        font-weight:bold}
span.PlainTextChar
        {font-family:Consolas}
span.BalloonTextChar
        {font-family:"Tahoma","sans-serif"}
span.IntenseQuoteChar
        {font-family:"Calibri","sans-serif";
        color:#4F81BD;
        font-weight:bold;
        font-style:italic}
p.body, li.body, div.body
        {margin:0in;
        margin-bottom:.0001pt;
        font-size:12.0pt;
        font-family:"Helvetica","sans-serif";
        color:black}
p.justified, li.justified, div.justified
        {margin-right:0in;
        margin-left:0in;
        font-size:12.0pt;
        font-family:"Times New Roman","serif"}
p.standard, li.standard, div.standard
        {margin:0in;
        margin-bottom:.0001pt;
        text-autospace:ideograph-other;
        font-size:12.0pt;
        font-family:"Liberation Serif"}
p.msochpdefault, li.msochpdefault, div.msochpdefault
        {margin-right:0in;
        margin-left:0in;
        font-size:10.0pt;
        font-family:"Times New Roman","serif"}
p.Default, li.Default, div.Default
        {margin:0in;
        margin-bottom:.0001pt;
        text-autospace:none;
        font-size:12.0pt;
        font-family:"Times New Roman","serif";
        color:black}
span.heading2char0
        {font-family:"Cambria","serif";
        color:#4F81BD;
        font-weight:bold}
span.plaintextchar0
        {font-family:Consolas}
span.balloontextchar0
        {font-family:"Tahoma","sans-serif"}
span.heading2char00
        {font-family:"Cambria","serif";
        color:#4F81BD;
        font-weight:bold}
span.plaintextchar00
        {font-family:Consolas}
span.balloontextchar00
        {font-family:"Tahoma","sans-serif"}
span.heading2char000
        {font-weight:bold}
span.plaintextchar000
        {font-family:Consolas}
span.balloontextchar000
        {font-family:"Tahoma","sans-serif"}
span.emailstyle27
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle28
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle29
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.affiliation
        {font-family:"Times New Roman","serif"}
span.emailstyle32
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle33
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle34
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle35
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle36
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle37
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle38
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle39
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle40
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle41
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle42
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle43
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle44
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle45
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle46
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle47
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle48
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle49
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle50
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle51
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle52
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle53
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle54
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle55
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle56
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle57
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle58
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle59
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle60
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle61
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle65
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle66
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle67
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle71
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle72
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle73
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle74
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle75
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle76
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle77
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle78
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle83
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle84
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle85
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle86
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.emailstyle87
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle92
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle93
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle94
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle95
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle96
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle97
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
span.EmailStyle98
        {font-family:"Calibri","sans-serif";
        color:#1F497D}
p.Normal1, li.Normal1, div.Normal1
        {margin:0in;
        margin-bottom:.0001pt;
        line-height:115%;
        font-size:11.0pt;
        font-family:"Arial","sans-serif";
        color:black}
.MsoChpDefault
        {font-size:10.0pt}
@page WordSection1
        {margin:1.0in 1.0in 1.0in 1.0in}
ol
        {margin-bottom:0in}
ul
        {margin-bottom:0in}
-->
</style><style type="text/css" id="owaParaStyle">
<!--
-->
</style>
</head>
<body lang="EN-US" link="blue" vlink="purple" fpstyle="1" ocsi="0">
<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 10pt;">
<div style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0);">
<div style="font-family: "Times New Roman"; color: rgb(0, 0, 0);">
<div>
<div style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0);">
<div style="font-family: "Times New Roman"; color: rgb(0, 0, 0);">
<div>
<div style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0);">
<div style="font-family: "Times New Roman"; color: rgb(0, 0, 0);">
<div>
<div style="direction: ltr; font-family: Tahoma; color: rgb(0, 0, 0);">
<div><span id="docs-internal-guid-9f2a40ae-584d-f1f5-55e1-1a6b8e55fe71">
<div><span style="font-family: Arial; vertical-align: baseline; white-space: pre-wrap;"><span id="docs-internal-guid-49976215-7dbe-80b6-23e4-6b3e1d89a3bd" style="font-size: 9pt;">
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:28pt; font-family:'Times New Roman'; color:rgb(192,0,0); font-weight:700; vertical-align:baseline">Spring 2017 Colloquium</span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:16pt; font-family:'Times New Roman'; font-weight:700; vertical-align:baseline">Department of Physics & Astronomy</span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:16pt; font-family:'Times New Roman'; color:rgb(192,0,0); font-weight:700; vertical-align:baseline">April 20, Thursday, 4-5 PM in Science Building 127</span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:14pt; font-family:'Times New Roman'; vertical-align:baseline">(coffee and cookies will be served at 3:50 PM)</span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:18pt; font-family:'Times New Roman'; color:#00b050; background-color:transparent; font-weight:700; font-style:normal; font-variant:normal; text-decoration:none; vertical-align:baseline; white-space:pre-wrap">Solid State Physics
</span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:18pt; font-family:'Times New Roman'; color:#0000ff; background-color:transparent; font-weight:700; font-style:normal; font-variant:normal; text-decoration:none; vertical-align:baseline; white-space:pre-wrap">Phosphate-based solid acids
as functional fuel cell electrolytes</span><span style="font-size:18pt; font-family:'Times New Roman'; color:#0000ff; background-color:transparent; font-weight:700; font-style:normal; font-variant:normal; text-decoration:none; vertical-align:baseline; white-space:pre-wrap"><br class="kix-line-break">
</span><span style="font-size:14pt; font-family:'Times New Roman'; color:#000000; background-color:transparent; font-weight:700; font-style:normal; font-variant:normal; text-decoration:none; vertical-align:baseline; white-space:pre-wrap">Dr. Cristian Botez</span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:14pt; font-family:'Times New Roman'; vertical-align:baseline"><span id="docs-internal-guid-49976215-7dbf-99fb-5ec5-938f4b52f45c"><span style="font-size:14pt; font-weight:700; vertical-align:baseline">University of Texas at El Paso
</span></span></span></p>
<p dir="ltr" style="line-height:1.38; margin-top:0pt; margin-bottom:0pt; text-align:center">
<span style="font-size:14pt; font-family:'Times New Roman'; vertical-align:baseline"><span><span style="font-size:14pt; font-weight:700; vertical-align:baseline"><br>
</span></span></span></p>
<div style="text-align:center"><img src="https://lh4.googleusercontent.com/FGDg_k_xfH4vV6fJICcCVu70IJ1g2Q0DtGgqtrM5bIOetcHAdajwGy-BKPwQzpfqM9JlobKEdltXRNVBrx_dnnq6xmXfZqYIPD2EaA1Xw8fn-uAt7G5R8TOKdjYIbeJ3dRIIrYOE" style="font-family:'Times New Roman',serif; line-height:22.08px; border:none" height="190" width="150"></div>
</span>
<p dir="ltr" style="font-size: 9pt; line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt; text-align: justify;">
<span style="font-size:10pt; font-family:Arial; vertical-align:baseline">Dr. Cristian Botez earned BS (1991) in Engineering Physics from the University of Bucharest, Romania, MS (1999) and Ph.D. (2002) degrees in Physics from the University of Missouri. He
worked as a postdoctoral researcher at Brookhaven National Laboratory. In 2005, Dr. Botez began his appointment as an assistant professor at the University of Texas at El Paso, where he is currently doing research in solid state physics. More information about
Dr. Botez and his research can be found at </span></p>
<p dir="ltr" style="font-size: 9pt; line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt; text-align: justify;">
<a href="https://academics.utep.edu/Default.aspx?tabid=18629" style="text-decoration:none" target="_blank"><span style="font-size:10pt; font-family:Arial; color:rgb(17,85,204); text-decoration:underline; vertical-align:baseline">https://academics.utep.edu/Default.aspx?tabid=18629</span></a></p>
<p dir="ltr" style="font-size: 9pt; line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt; text-align: justify;">
<span style="font-size:11pt; font-family:'Times New Roman'; font-weight:700; vertical-align:baseline"><br>
</span></p>
<p dir="ltr" style="line-height: 1.38; margin-top: 0pt; margin-bottom: 0pt; text-align: justify;">
<span style="font-family: "Times New Roman"; font-weight: 700; vertical-align: baseline;"><font size="4">Abstract:</font></span><span style="font-size: 11pt; font-family: "Times New Roman"; font-weight: 700; vertical-align: baseline;">
</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">Understanding and eventually controlling the atomic-level structures and mechanisms responsible for the macroscopic behavior of functional compounds is one of the main goals
of modern materials research. Achieving this goal might enable the “rational design” of functional materials, a dramatic improvement over the current trial-and-error approach. In this context, I will present our experimental work aimed at uncovering the crystal
structures and conduction mechanisms responsible for the abrupt, three-order-of-magnitude proton conductivity increase exhibited by certain phosphate-based solid acids above a temperature threshold. This so-called superprotonic behavior allows CsH</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">2</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">PO</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">4</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">
and RbH</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">2</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">PO</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">4</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">
to function as fuel cell electrolytes at temperatures between 150 </span><span style="font-size: 12pt; font-family: Arial; vertical-align: baseline;">°C</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;"> and 350
</span><span style="font-size: 12pt; font-family: Arial; vertical-align: baseline;">°C</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">: a remarkable application that attracted significant interest. Yet, prior to our investigations,
the nature of the microscopic modifications responsible for the above-mentioned proton conductivity jump had been under debate for almost two decades. We have used laboratory and synchrotron x-rays to carry out time- and temperature-resolved diffraction experiments
on samples kept under both ambient- and high-pressure. Our results unequivocally demonstrate that the observed proton conductivity enhancement is due to a monoclinic-to-cubic polymorphic phase transition, and not to chemical decomposition effects induced by
dehydration, as previously proposed. In addition, our data show that the cubic modifications of CsH</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">2</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">PO</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">4
</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">and RbH</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">2</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">PO</span><span style="font-size: 6.6pt; font-family: Arial; vertical-align: sub;">4
</span><span style="font-size: 11pt; font-family: Arial; vertical-align: baseline;">are isomorphic, a clear indication that a general (non-cation-specific) proton conduction mechanism is at work in the superprotonic phases of these compounds.</span></p>
<span style="font-size: 9pt;"></span>
<div style="font-size: 9pt;"><span style="font-size:11pt; font-family:Arial; vertical-align:baseline"><br>
</span></div>
<span style="font-size: 9pt;"></span></span></div>
</span></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</body>
</html>