Ferroelectric nanodomain engineering and film fabrication on lithium niobate single crystals
On the basis of the crystallographic structure and chemical bonding properties, the different domain characteristics between the -Z and +Z surfaces of near-stoichiometric lithium niobate (SLN) crystals are studied. The analytical results indicate that the -Z surface of SLN crystals is preferred to fabricating the expected morphologies and to designing superstructures. The domain switching and surface morphology at the -Z surface of SLN crystals have been investigated by scanning force microscopy (SFM) and chemical etching method. Regular dot and lattice patterns may be fabricated at the -Z surface of SLN crystals by SFM, the hexagonal morphology can also be clearly observed by the chemical etching method. Scanning force microscopy is used to investigate nanoscale ferroelectric domains engineering at the -Z surface of SLN single crystals. The SLN single crystal wafers powder and colloidal silica solutions. Dot patterns of the nanodomain structure are fabricated at the -Z surface of SLN wafers, which are switched by scanning these wafers with the external field exceeding the coercive field. The -Z polar surfaces in these patterns are preferentially etched by the mixture acid aqueous solution (HF:HNO3=1:1), a hexagonal shape of nanodomain patterns is clearly observed, which originates from the three-fold symmetry of the SLN crystal. It is considered that such nanodomain patterns can be effectively employed to create unique templates and devices.
microdomain engineering near-stoichiometric lithium niobate ferroelectric materials single crystal
Dongfeng Xue Congting Sun Xu Zhang
Department of Materials Science and Chemical Engineering, School of Chemical Engineering, Dalian Uni Key Laboratory for Micro/Nano Technology and System of Liaoning Province,Dalian University of Techno
国际会议
The 12th Asian Pacific Confederation of Chemical Engineering Congress(第十二届亚太化工联盟大会暨化工展览会)
大连
英文
2008-08-04（万方平台首次上网日期，不代表论文的发表时间）