Subatomic deformation driven by vertical piezoelectricity from CdS ultrathin films.
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Driven by the development of high-performance piezoelectric materials, actuators become an important tool for positioning objects with high accuracy down to nanometer scale, and have been used for a wide variety of equipment, such as atomic force microscopy and scanning tunneling microscopy. However, positioning at the subatomic scale is still a great challenge. Ultrathin piezoelectric materials may pave the way to positioning an object with extreme precision. Using ultrathin CdS thin films, we demonstrate vertical piezoelectricity in atomic scale (three to five space lattices). With an in situ scanning Kelvin force microscopy and single and dual ac resonance tracking piezoelectric force microscopy, the vertical piezoelectric coefficient (d 33) up to 33 pm·V(-1) was determined for the CdS ultrathin films. These findings shed light on the design of next-generation sensors and microelectromechanical devices.
Published Version (Please cite this version)
Wang, Xuewen, Xuexia He, Hongfei Zhu, Linfeng Sun, Wei Fu, Xingli Wang, Lai Chee Hoong, Hong Wang, et al. (2018). Subatomic deformation driven by vertical piezoelectricity from CdS ultrathin films. Sci Adv, 2(7). p. e1600209. 10.1126/sciadv.1600209 Retrieved from https://hdl.handle.net/10161/16048.
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Dr. Liu’s research interests are focusing on the chemistry and material science of nanoscale materials. Specific topics in his current research program include: Self-assembly of nanostructures; Preparation and chemical functionalization of single walled carbon nanotubes; Developing carbon nanotube based chemical and biological sensors; SPM based fabrication and modification of functional nanostructures.
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