Scanning Nonlinear Dielectric Microscopy (SNDM)
(Probe Recording on Ferroelectric Media)

SNDM images of multi-domain structures of a congruent LiTaO₃ single crystal thin plate (CLT) at RH 12% and 78%. From the image, water layer increases sensitivity, whereas decreases lateral resolution. This shows that the image reproducibility is depended on RH in the vacuum chamber [7,8].

Ref.[8]. Masatoshi Yasutake et al, ICN + T2006; http :// www.hitachi-hitec-science.com/en/products/spm/tec_poster/poster01.html

Quiz 20:

(Q20.1). What is the advantage of having a sharp tip in SPM?

(Q20.2). How does the tunnel current vary with the tip to surface distance?

(Q20.3). What is the advantage of scanning thermal microscopy over scanning tunneling microscopy?