Fabrication of single crystal molybdate: A new protocol of coupling metal ion interaction and oriented-attachment with assistance of supercritical CO2

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-05-06 DOI:10.1016/j.mseb.2025.118379

Xuzhe Wang , Yongqi Wu , Xiaohong Chen , Dewei Liu , Lamei Zhang , Xuezhen Zhai , Mingyuan Li

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Abstract

The fabrication of single crystals has always been the fundamental to the development of semiconductor, microelectronics, and the related solid-state science. However, synthesis of large-sized single crystals with anisotropic structures for functional materials remains challenging. In this work, we design a novel method to obtain single crystal molybdate nanostructures, in which it combines the metal ions intercalation into α-MoO₃ crystal structure to form molybdate nanocrystals, and subsequently the efficient oriented attachment (OA) of nanocrystals to form single crystalline molybdate nanostructures. Three typical large-size single crystals as CoMoO₄, Fe₂(MoO₄)₃ and ZnMoO₄ have been successfully fabricated. Our study indicates supercritical CO₂ plays a crucial role in the formation process of single crystal molybdate nanostructures no matter for intercalation process or oriented attachment. Further the crystal growth mechanism behind the experiment is explored carefully and stated in detail in this work.

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钼酸盐单晶的制备：在超临界CO2辅助下金属离子相互作用和定向吸附的新方案

单晶的制造一直是半导体、微电子和相关固态科学发展的基础。然而，合成具有各向异性结构的功能材料的大尺寸单晶仍然具有挑战性。本文设计了一种获得单晶钼酸盐纳米结构的新方法，将金属离子嵌入α-MoO3晶体结构中形成钼酸盐纳米晶体，然后将纳米晶体的高效取向附着（OA）形成单晶钼酸盐纳米结构。成功制备了CoMoO4、Fe2(MoO4)3和ZnMoO4三种典型的大尺寸单晶。研究表明，无论是嵌层过程还是定向附着过程，超临界CO2在钼酸盐单晶纳米结构的形成过程中都起着至关重要的作用。进一步探讨了实验背后的晶体生长机制，并对其进行了详细的阐述。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.