Charge gradient microscopy.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 24760831.
- Also identified by DOI 10.1073/pnas.1324178111 and PMC identifier 4020115.
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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 μm. We envision that CGM can be used in high-speed ferroelectric domain imaging and piezoelectric energy-harvesting devices.