摘要
Low-frequency （below 100 kHz, even down to several hundred Hz） near-field scan- ning probe acoustic microscopy （SPAM） was successfully developed based on the commer- cial atomic force microscope, providing a subsurface depth profile information and as well as nanoscale spatial resolution up to several nm. SPAM was successfully used to image locally domain configurations of ferroelectric materials and subsurface structures of other materials. Ferroelectric domain structures and the buried structures were clearly visualized by scanning probe acoustic microscopy. The acoustic imaging origin is discussed in terms of interaction between the excited acoustic wave and local structures beneath the SPAM tip. It is expected that the scanning probe acoustic microscopy in application to ferroelectrics and other materials undoubtedly enrich our understanding the nature of ferroelectricity and elasticity at submicro-, even nano-meter scale.
Low-frequency （below 100 kHz, even down to several hundred Hz） near-field scan- ning probe acoustic microscopy （SPAM） was successfully developed based on the commer- cial atomic force microscope, providing a subsurface depth profile information and as well as nanoscale spatial resolution up to several nm. SPAM was successfully used to image locally domain configurations of ferroelectric materials and subsurface structures of other materials. Ferroelectric domain structures and the buried structures were clearly visualized by scanning probe acoustic microscopy. The acoustic imaging origin is discussed in terms of interaction between the excited acoustic wave and local structures beneath the SPAM tip. It is expected that the scanning probe acoustic microscopy in application to ferroelectrics and other materials undoubtedly enrich our understanding the nature of ferroelectricity and elasticity at submicro-, even nano-meter scale.
基金
the National High-Technology Research & Development Program of China (2007AA03Z330)
the National Science Foundation of China(10774113)
the National Key Development Program for Basic Research of China(2009CB623305)
the Foundation for Innovative Research Groups of the National Natural Science Foundation of China(50821004)
the Nanotechnology Project of Shanghai Science and Technology Committee(0852nm06900)
by the National Research Foundation of Korea(NSFC-KOSEF)
the National Natural Science Foundation of China(NSFC)
