Literature DB >> 28737161

LiNbO3 surfaces from a microscopic perspective.

Simone Sanna1, Wolf Gero Schmidt.   

Abstract

A large number of oxides has been investigated in the last twenty years as possible new materials for various applications ranging from opto-electronics to heterogeneous catalysis. In this context, ferroelectric oxides are particularly promising. The electric polarization plays a crucial role at many oxide surfaces, and it largely determines their physical and chemical properties. Ferroelectrics offer in addition the possibility to control/switch the electric polarization and hence the surface chemistry, allowing for the realization of domain-engineered nanoscale devices such as molecular detectors or highly efficient catalysts. Lithium niobate (LiNbO3) is a ferroelectric with a high spontaneous polarization, whose surfaces have a huge and largely unexplored potential. Owing to recent advances in experimental techniques and sample preparation, peculiar and exclusive properties of LiNbO3 surfaces could be demonstrated. For example, water films freeze at different temperatures on differently polarized surfaces, and the chemical etching properties of surfaces with opposite polarization are strongly different. More important, the ferroelectric domain orientation affects temperature dependent surface stabilization mechanisms and molecular adsorption phenomena. Various ab initio theoretical investigations have been performed in order to understand the outcome of these experiments and the origin of the exotic behavior of the lithium niobate surfaces. Thanks to these studies, many aspects of their surface physics and chemistry could be clarified. Yet other puzzling features are still not understood. This review gives a résumé on the present knowledge of lithium niobate surfaces, with a particular view on their microscopic properties, explored in recent years by means of ab initio calculations. Relevant aspects and properties of the surfaces that need further investigation are briefly discussed. The review is concluded with an outlook of challenges and potential payoff for LiNbO3 based applications.

Entities:  

Year:  2017        PMID: 28737161     DOI: 10.1088/1361-648X/aa818d

Source DB:  PubMed          Journal:  J Phys Condens Matter        ISSN: 0953-8984            Impact factor:   2.333


  2 in total

1.  Explosive electrostatic instability of ferroelectric liquid droplets on ferroelectric solid surfaces.

Authors:  Raouf Barboza; Stefano Marni; Fabrizio Ciciulla; Farooq Ali Mir; Giovanni Nava; Federico Caimi; Annamaria Zaltron; Noel A Clark; Tommaso Bellini; Liana Lucchetti
Journal:  Proc Natl Acad Sci U S A       Date:  2022-08-01       Impact factor: 12.779

2.  Enhanced photoluminescence and shortened lifetime of DCJTB by photoinduced metal deposition on a ferroelectric lithography substrate.

Authors:  Yuan-Fong Chou Chau; Hao-En Chang; Po-Sheng Huang; Pin Chieh Wu; Chee Ming Lim; Li-Ming Chiang; Tzyy-Jiann Wang; Chung-Ting Chou Chao; Tsung Sheng Kao; Min-Hsiung Shih; Hai-Pang Chiang
Journal:  Sci Rep       Date:  2022-04-13       Impact factor: 4.379

  2 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.