BEGIN:VCALENDAR VERSION:2.0 METHOD:PUBLISH PRODID:-//Missouri State University/Calendar of Events//EN CALSCALE:GREGORIAN X-WR-TIMEZONE:America/Chicago BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 DTSTART:20070311T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU TZNAME:CDT END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 DTSTART:20071104T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU TZNAME:CST END:STANDARD END:VTIMEZONE BEGIN:VEVENT UID:46ec5710-8acd-4754-bee1-54173e3d80c4.215642@calendar.missouristate.edu CREATED:20210217T232348Z LAST-MODIFIED:20210217T232348Z LOCATION: SUMMARY:PAMS Seminar: "Watching Electrons Move at Interfaces: Visualizing Charge and Spin Dynamics Using Ultrafast XUV Spectroscopy" by Dr. Robert Baker DESCRIPTION:Dr. Robert BakerNational eXtreme Ultrafast Science (NeXUS)Ohio State University\n\n\nAbstract:Directly observing electron dynamics at s urfaces is required to understand and control the material properties tha t determine efficiency of many applications including efficient energy co nversion as well as ultrafast information processing.  Toward this goal\, we have developed extreme ultraviolet reflection-absorption (XUV-RA) spe ctroscopy as a surface-specific analog of XUV transient absorption.  This method combines the benefits of traditional X-ray absorption spectroscop y\, such as element\, oxidation\, and spin state resolution\, with surfac e sensitivity and ultrafast time resolution.  Using this technique\, we i nvestigate charge and spin dynamics in materials with applications rangin g from photocatalysis to optical control of magnetic switching.  In one e xample\, we describe a systematic comparison of surface and bulk electron polaron formation in hematite showing that surface self-trapping dynamic s differ significantly from bulk and that these dynamics can be systemati cally tuned by surface molecular functionalization offering the possibili ty for design of photocatalytic interfaces with enhanced carrier transpor t based on earth abundant materials.  In a second example\, we highlight evolving applications of XUV-RA spectroscopy to study spin dynamics at su rfaces.  Applications include understanding ultrafast spin crossover in m agnetic semiconductors as well as control of spin polarized electron dyna mics at chiral photochemical interfaces.  Last\, I will describe capabili ties that will soon become available at the NSF National eXtreme Ultrafas t Science Facility (NeXUS) that is currently under development at Ohio St ate University.\n\n\nThis seminar will be held exclusively on Zoom (955 5 209 1021). Please visit the Physics Seminars page for a link. X-ALT-DESC;FMTTYPE=text/html:<html><head><title></title></head><body><p>Dr . Robert Baker<br>National eXtreme Ultrafast Science (NeXUS)<br>Ohio Stat e University</p>\n<p>Abstract:<br>Directly observing electron dynamics at surfaces is required to understand and control the material properties t hat determine efficiency of many applications including efficient energy conversion as well as ultrafast information processing.&nbsp\; Toward thi s goal\, we have developed extreme ultraviolet reflection-absorption (XUV -RA) spectroscopy as a surface-specific analog of XUV transient absorptio n.&nbsp\; This method combines the benefits of traditional X-ray absorpti on spectroscopy\, such as element\, oxidation\, and spin state resolution \, with surface sensitivity and ultrafast time resolution.&nbsp\; Using t his technique\, we investigate charge and spin dynamics in materials with applications ranging from photocatalysis to optical control of magnetic switching.&nbsp\; In one example\, we describe a systematic comparison of surface and bulk electron polaron formation in hematite showing that sur face self-trapping dynamics differ significantly from bulk and that these dynamics can be systematically tuned by surface molecular functionalizat ion offering the possibility for design of photocatalytic interfaces with enhanced carrier transport based on earth abundant materials.&nbsp\; In a second example\, we highlight evolving applications of XUV-RA spectrosc opy to study spin dynamics at surfaces.&nbsp\; Applications include under standing ultrafast spin crossover in magnetic semiconductors as well as c ontrol of spin polarized electron dynamics at chiral photochemical interf aces.&nbsp\; Last\, I will describe capabilities that will soon become av ailable at the NSF National eXtreme Ultrafast Science Facility (NeXUS) th at is currently under development at Ohio State University.</p>\n<p>This seminar will be held exclusively on Zoom (955 5209 1021). Please visit th e&nbsp\;<a href="https://physics.missouristate.edu/seminars.htm">Physics Seminars page</a> for a link.</p></body></html> DTSTART;TZID=America/Chicago:20210304T160000 DTEND;TZID=America/Chicago:20210304T170000 SEQUENCE:0 URL:https://physics.missouristate.edu/seminars.htm CATEGORIES:Public,Alumni,Current Students,Faculty,Future Students,Staff END:VEVENT END:VCALENDAR