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DTSTART:20251102T010000
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DTSTAMP:20250924T195829Z
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DTSTART;TZID=America/Chicago:20250924T110000
DTEND;TZID=America/Chicago:20250924T115500
DESCRIPTION:Ions form the fundamental building blocks of most ceramic mater
 ials\, where positive and negative ions are arranged as neighbors\, primar
 ily bonded through ionic interactions at the atomic scale. Additionally\, 
 certain polymeric and semiconductor materials contain mobile ions capable 
 of diffusing in and out of the material matrix. In ferroelectric materials
 \, polarization charges are typically compensated by an equal amount of op
 positely charged surface screening charges under ambient conditions. There
 fore\, visualizing the spatial distribution\, charge state\, and dynamics 
 of both ions and polarization is critical for advancing our understanding 
 of the electrochemical properties of functional materials.\nHere\, I will 
 introduce our recent research on advanced imaging techniques for probing f
 erroelectric polarization. We employ contrast mechanisms such as piezoelec
 tric strain\, screening charges\, and friction coefficients as markers to 
 visualize polarization at the nanoscale. I will also discuss how these tec
 hniques contribute to the development of energy harvesting devices and imp
 rovements in chemical mechanical polishing processes. Furthermore\, I will
  present our work on imaging ionic species and charged defects using marke
 rs like electrochemical strain and local electric fields to map ion distri
 butions. Finally\, I will illustrate how imaging ion and electron conducti
 on pathways provides insights into the nanoscale behavior and performance 
 of battery materials.\n\nCo-sponsored by: Yi Li\n\nSpeaker(s): Prof. Seung
 bum Hong\, \n\nVirtual: https://events.vtools.ieee.org/m/502555
LOCATION:Virtual: https://events.vtools.ieee.org/m/502555
ORGANIZER:novosad@ieee.org
SEQUENCE:20
SUMMARY:Nanoscale Imaging of Polarization and Ion Distributions in Function
 al Materials
URL;VALUE=URI:https://events.vtools.ieee.org/m/502555
X-ALT-DESC:Description: <br /><p>Ions form the fundamental building blocks 
 of most ceramic materials\, where positive and negative ions are arranged 
 as neighbors\, primarily bonded through ionic interactions at the atomic s
 cale. Additionally\, certain polymeric and semiconductor materials contain
  mobile ions capable of diffusing in and out of the material matrix. In fe
 rroelectric materials\, polarization charges are typically compensated by 
 an equal amount of oppositely charged surface screening charges under ambi
 ent conditions. Therefore\, visualizing the spatial distribution\, charge 
 state\, and dynamics of both ions and polarization is critical for advanci
 ng our understanding of the electrochemical properties of functional mater
 ials.<br>Here\, I will introduce our recent research on advanced imaging t
 echniques for probing ferroelectric polarization. We employ contrast mecha
 nisms such as piezoelectric strain\, screening charges\, and friction coef
 ficients as markers to visualize polarization at the nanoscale. I will als
 o discuss how these techniques contribute to the development of energy har
 vesting devices and improvements in chemical mechanical polishing processe
 s. Furthermore\, I will present our work on imaging ionic species and char
 ged defects using markers like electrochemical strain and local electric f
 ields to map ion distributions. Finally\, I will illustrate how imaging io
 n and electron conduction pathways provides insights into the nanoscale be
 havior and performance of battery materials.</p>
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