The purpose of this study is to elucidate the origin of the additional response signals arising from the surface topography of samples during piezoresponse force microscopy (PFM) measurements. Periodic mountain-shaped protrusions with triangular cross-sections were fabricated on the surface of a silicon single crystal. a material with no inherent piezoelectricity. and PFM measurements... https://www.markbroyard.com/limited-find-summer-salt-body-crystal-soap-aquamarine-lemongrass-155g-online-now-on-sale/