Simultaneous Elastic and Electromechanical Imaging by Scanning Probe Microscopy: Theory and Applications to Ferroelectric and Biological Materials

Journal Article · Sat Jan 01 00:00:00 EST 2005 · Journal of Vacuum Science & Technology B

DOI:https://doi.org/10.1116/1.2052714· OSTI ID:1003047

Shin, Junsoo ^[1]; Rodriguez, Brian J ^[1]; Baddorf, Arthur P ^[1]; Thundat, Thomas George ^[1]; Karapetian, E. ^[2]; Kachanov, M. ^[3]; Gruverman, A. ^[4]; Kalinin, Sergei V ^[1]

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1. ORNL
2. Suffolk University, Boston
3. Tifts University, Medford, MA
4. North Carolina State University

An approach for combined imaging of elastic and electromechanical properties of materials, referred to as piezoacoustic scanning probe microscopy (PA-SPM), is presented. Applicability of this technique for elastic and electromechanical imaging with nanoscale resolution in such dissimilar materials as ferroelectrics and biological tissues is demonstrated. The PA-SPM signal formation is analyzed based on the theory of nanoelectromechanics of piezoelectric indentation and signal sensitivity to materials properties and imaging conditions. It is shown that simultaneous measurements of local indentation stiffness and indentation piezocoefficient provide the most complete description of the local electroelastic properties for transversally isotropic materials, thus making piezoacoustic SPM a comprehensive imaging and analysis tool. The contrast formation mechanism in the low frequency regime is described in terms of tip-surface contact mechanics. Signal generation volumes for electromechanical and elastic signals are determined and relative sensitivity of piezoresponse force microscopy (PFM) and atomic force acoustic microscopy (AFAM) for topographic cross-talk is established.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Laboratory Directed Research and Development (LDRD) Program
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1003047
• Journal Information: Journal of Vacuum Science & Technology B, Vol. 23, Issue 5; ISSN 0734-211X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
47 OTHER INSTRUMENTATION
FERROELECTRIC MATERIALS
BIOLOGICAL MATERIALS
MICROSCOPY
PIEZOELECTRICITY
SENSITIVITY
TECHNOLOGY ASSESSMENT