Ferroelectric materials can be utilized to construct super
high-density molecular memory. In this study, the nano-scale
polarization switching and detection in ferroelectric organic
molecules was succeeded by using an scanning probe microscopy
(SPM) technique. The dipole switching was achieved by applying an
electric voltage to the P(VDF/TrFE) film spin-coated on Pt
substrate, and the local polarization domains were detected by
the piezoelectric vibration, the amplitude and phase of which
were measured using a lock-in amplifier. The piezoelectric
response image revealed that several domain regions could be
formed within a small crystallite of about 200 nm in length.
These facts suggest that the reversible molecular memory with
super high-density can be constructed. Moreover, it was revealed
that ultra-thin films with dipole orientation could be formed
directly by the vacuum evaporation under a dc electric field.
Professor Kazumi Matsushige, Director of Kyoto-University Venture
Graduate School of Engineering, Kyoto University,
Yoshida-honmachi, Sakyo-ku, Kyoto 606-01 Japan
ph: +81-75-753-5308, fax: +81-75-753-7570, E-mail: email@example.com.