期刊
NANOTECHNOLOGY
卷 23, 期 12, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/23/12/125704
关键词
-
资金
- Office of Science, Basic Energy Sciences Program, Division of User Facilities
A multidimensional scanning probe microscopy approach for quantitative, cross-talk free mapping of surface electrostatic properties is demonstrated. Open-loop band excitation Kelvin probe force microscopy (OL BE KPFM) probes the full response-frequency-potential surface at each pixel at standard imaging rates. The subsequent analysis reconstructs work function, tip-surface capacitance gradient and resonant frequency maps, obviating feedback-related artifacts. OL BE KPFM imaging is demonstrated for several materials systems with topographic, potential and combined contrast. This approach combines the features of both frequency and amplitude KPFM and allows complete decoupling of topographic and voltage contributions to the KPFM signal.
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