Review: theoretical and experimental investigation of the intrinsic properties of Zn 2 GeO 4 nanocrystals
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Review: theoretical and experimental investigation of the intrinsic properties of Zn2GeO4 nanocrystals Joa˜o P. A. de Jesus1, Anne C. L. Santos2, Felipe M. Pinto3, Carlton A. Taft4, and Felipe A. La Porta1,2,* 1
Laboratory of Nanotechnology and Computational Chemistry, Federal Technological University of Paraná, Avenida dos Pioneiros 3131, Londrina, Paraná 86036-370, Brazil 2 Post-Graduation Program in Chemistry, State University of Londrina, Rodovia Celso Garcia Cid, 445, km 380, Londrina, Paraná 86057-970, Brazil 3 Department of Engineering, Federal University of Lavras, Lavras, Minas Gerais 37200-900, Brazil 4 Centro Brasileiro de Pesquisas Físicas, CBPF, Rio de Janeiro 22290-180, Brazil
Received: 17 September 2020
ABSTRACT
Accepted: 9 November 2020
Nanocrystals of Zn2GeO4 have received increasing attention in recent years for their wide range of potential applications, owing to their fascinating physical and chemical properties, which may be modulated through bandgap engineering, and hence are strongly dependent on the synthesis method. This review summarizes the current progress in the fundamental understanding of the synthesis, properties, and applications of Zn2GeO4 nanocrystals. These findings may provide a critical assessment of the variations of structural order–disorder effects that, in turn, afford new chemical insights into materials design. Therefore, this approach is essential to the development of novel functional nanoscale materials with entirely new and tailored properties for applications of interest.
Springer Science+Business
Media, LLC, part of Springer Nature 2020
Handling Editor: M. Grant Norton.
Address correspondence to E-mail: [email protected]; [email protected]
https://doi.org/10.1007/s10853-020-05549-8
J Mater Sci
GRAPHICAL ABSTRACT
Introduction Nanocrystalline phenakite-like zinc germanate, Zn2GeO4 (ZGO), an n-type ultra-wide-bandgap semiconductor of approximately 4.4 eV, is of great interest for a variety of emergent applications due to its excellent functional properties, and despite its discovery decades ago, its physicochemical properties have yet to be better explored [1–11]. In particular, the first study on ZGO materials was published approximately 71 years ago [12]. Currently, this material can be easily obtained by multiple synthetic strategies that allow sensitive control of its particle sizes, composition, morphologies, and inherent
defects [6]. Therefore, the properties of ZGO materials can be tailored for a wide variety of applications including catalytic, lithium-ion battery (LIB) components, biomedical, optical, sensing, and electronic applications [13–32]. As such, this has contributed to a considerable increase in the number of publications and citations during the last 5 years. Hence, based on a variety of experimental and theoretical studies, the present review focuses on introducing the principle basics of the relation of ZGO-based materials synthesis, electronic structure, and fundamental properties for the rhombohedral ZGO str
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