Charge gradient microscopy

Seungbum Hong; Sheng Tong; Woon Ik Park; Yoshiomi Hiranaga; Yasuo Cho; Andreas Roelofs

doi:10.1073/pnas.1324178111

Charge gradient microscopy

Seungbum Hong, Sheng Tong, Woon Ik Park, Yoshiomi Hiranaga, Yasuo Cho, Andreas Roelofs

Information Devices Division

Research output: Contribution to journal › Article › peer-review

40 Citations (Scopus)

Abstract

Here we present a simple and fast method to reliably image polarization charges using charge gradient microscopy (CGM). We collected the current from the grounded CGM probe while scanning a periodically poled lithium niobate single crystal and single-crystal LiTaO3 thin film on the Cr electrode. We observed current signals at the domains and domain walls originating from the displacement current and the relocation or removal of surface charges, which enabled us to visualize the ferroelectric domains at a scan frequency above 78 Hz over 10 ìm. We envision that CGM can be used in high-speed ferroelectric domain imaging and piezoelectric energyharvesting devices.

Original language	English
Pages (from-to)	6566-6569
Number of pages	4
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	111
Issue number	18
DOIs	https://doi.org/10.1073/pnas.1324178111
Publication status	Published - 2014 May 6

Keywords

Atomic force microscopy
Charge scraping
Piezoresponse
Screen charge

ASJC Scopus subject areas

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10.1073/pnas.1324178111

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abstract = "Here we present a simple and fast method to reliably image polarization charges using charge gradient microscopy (CGM). We collected the current from the grounded CGM probe while scanning a periodically poled lithium niobate single crystal and single-crystal LiTaO3 thin film on the Cr electrode. We observed current signals at the domains and domain walls originating from the displacement current and the relocation or removal of surface charges, which enabled us to visualize the ferroelectric domains at a scan frequency above 78 Hz over 10 {\`i}m. We envision that CGM can be used in high-speed ferroelectric domain imaging and piezoelectric energyharvesting devices.",

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T1 - Charge gradient microscopy

AU - Hong, Seungbum

AU - Tong, Sheng

AU - Park, Woon Ik

AU - Hiranaga, Yoshiomi

AU - Cho, Yasuo

AU - Roelofs, Andreas

PY - 2014/5/6

Y1 - 2014/5/6

N2 - Here we present a simple and fast method to reliably image polarization charges using charge gradient microscopy (CGM). We collected the current from the grounded CGM probe while scanning a periodically poled lithium niobate single crystal and single-crystal LiTaO3 thin film on the Cr electrode. We observed current signals at the domains and domain walls originating from the displacement current and the relocation or removal of surface charges, which enabled us to visualize the ferroelectric domains at a scan frequency above 78 Hz over 10 ìm. We envision that CGM can be used in high-speed ferroelectric domain imaging and piezoelectric energyharvesting devices.

AB - Here we present a simple and fast method to reliably image polarization charges using charge gradient microscopy (CGM). We collected the current from the grounded CGM probe while scanning a periodically poled lithium niobate single crystal and single-crystal LiTaO3 thin film on the Cr electrode. We observed current signals at the domains and domain walls originating from the displacement current and the relocation or removal of surface charges, which enabled us to visualize the ferroelectric domains at a scan frequency above 78 Hz over 10 ìm. We envision that CGM can be used in high-speed ferroelectric domain imaging and piezoelectric energyharvesting devices.

KW - Atomic force microscopy

KW - Charge scraping

KW - Piezoresponse

KW - Screen charge

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Charge gradient microscopy

Abstract

Keywords

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