[LA-SiGMA] LASiGMA Seminar Reminder - Dr. Kenneth Poeppelmeier, Friday April 19, 3:30 p.m.

[sjlee at cct.lsu.edu]

Dear All,

Dr. Kenneth Poeppelmeier, of Northwestern University will be giving a  
seminar tomorrow, April 19th, at 3:30 p.m. in the Life Sciences Annex  
Auditorium (A-101) at Louisiana State University. The title of his  
talk is "Hydrothermal Synthesis of Noncentrosymmetric Mixed Metal  
Oxide-Fluorides."

Abstract:
This talk will discuss the chemical rationale Dr. Poeppelmeier have  
employed to make new mixed metal oxyfluoride compounds and their  
relationship with well-known noncentrosymmetric materials such as  
lithium niobate and potassium titanyl phosphate. Synthesis of  
noncentrosymmetric materials – materials that lack an inversion center  
– has been a long-standing and difficult goal of inorganic chemistry.  
Noncentrsoymmetric crystals are used for their piezoelectric,  
ferroelectric, and second-harmonic generation (SHG) properties.  
Recently, nanolithography has sought UV lasers to create increasingly  
small lithographic features. To pursue UV lasers, scientists have  
sought new SHG active crystals to double the frequency of laser light  
to higher energies. One such material is the oxyfluoride KBe2BO3F2; we  
seek to develop similar materials for use as SHG-active crystals.  
Efficient SHG-active crystals often have anions with aligned polar  
moments in the solid state. Therefore, to synthesize highly-efficient  
SHG crystals, a promising strategy is to utilize anions that  
inherently contain polar moments to establish principles and  
guidelines to target syntheses of SHG-active materials.

KENNETH POEPPELMEIER is Professor of Chemistry at Northwestern  
University. He received his B.S. (1971) and Ph.D. (1984) degrees from  
The University of Missouri, and Iowa State University respectively.  
For more information about his research, please click on the link  
below to access his webpage:  
http://chemgroups.northwestern.edu/poeppelmeier/people.html

The seminar will be a live broadcast from Louisiana State University,
and can be viewed live at the sites listed below:

UNO - Liberal Arts Building 234
Xavier - Qatar Pavilion Conference Room 226
Southern University - JB Moore Hall, Room 211
LATech - PML 1015, Center for Instructional Technology, at the Wyly Tower

The seminar will also be accessible via adobe connect by clicking on
following link:  https://connect.lsu.edu/la-sigma/

Please let me know if you have any questions.

Regards,

Shelley Lee
Project Coordinator
225-578-0465



















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