By using I as an oxidant and CHCN as a reaction medium, few-layer Mg-deficient borophene nanosheets (FBN) with a stoichiometric ratio of MgB are prepared by oxidizing MgB in a mixture of CHCN and HCl for 14 days under nitrogen protection and followed by ultrasonic delaminating in CHCN for 2 h. The prepared FBN possess a two-dimensional flake morphology, and they show a clear interference fringe with a -spacing of 0.251 nm corresponding to the (208) plane of rhombohedral boron. While maintaining the hexagonal boron networks of MgB, the FBN have an average thickness of about 4.14 nm (four monolayer borophene) and a lateral dimension of 500 nm, and the maximum Mg deintercalation rate can reach 78%. The acidity of the reaction system plays an important role; the HCl reaction system not only facilitates the oxidation of MgB by I, but also increases the deintercalation ratio of Mg atoms. Etching of the Mg atom layer with HCl, the negative charge decrease of the boron layer by I oxidation, and the Mg chelating effect from CHCOOH due to the hydrolysis of CHCN in an HCl environment led to a high deintercalation rate of the Mg atom. Density functional theory (DFT) calculations further support the result that the maximum deintercalation rate of Mg atoms is about 78% while maintaining the hexagonal layer structure of boron. This research solves the problems of low Mg atom deintercalation rate and hexagonal boron structure destruction when using the precursor MgB to produce borophene nanosheets, which is of great significance for large-scale novel preparation and application of borophene nanosheets.
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http://dx.doi.org/10.1039/d1nr07353b | DOI Listing |
Microb Pathog
December 2024
Department of Pharmaceutics, Jamia Salafiya Pharmacy College, Malappuram, Kerala 673 637, India.
Dalton Trans
December 2024
Integrated Science Education and Research Centre, Siksha Bhavana, Visva-Bharati University, Santiniketan 731 235, India.
Two-dimensional (2D) nanosheets of boron, borophene, have triggered interest in progressive research as a result of the vast field of opportunities to explore, from its innovative synthetic techniques to novel properties and potential applications. It possesses exceptional tuneable properties such as mechanical flexibility, electronic and thermal conductivity, optical transparency, metallicity, anisotropy and polymorphism. This has sparked significant curiosity in the application of borophene-based materials in energy storage systems such as supercapacitors, which display high-power density with reliable energy density, fast charge/discharge kinetics and long cycle life.
View Article and Find Full Text PDFNano Lett
September 2024
Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
Topological superconductors (TSCs) offer a promising avenue for delving into exotic states of matter and fundamental physics. We propose a strategy for realizing high transition temperatures (high-) in TSCs by leveraging nontrivial topology alongside a high carrier density near the Fermi level in metal-doped borophenes. We identified 39 candidates with exceptional thermodynamic stability from thousands of Be-intercalated borophenes (BeB) via extensive structural searches.
View Article and Find Full Text PDFAngew Chem Int Ed Engl
September 2024
State Key Laboratory of Mechanics and Control for Aerospace Structures, Laboratory of Intelligent Nano Materials and Devices of Ministry of Education, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
Neuromorphic computing, marked by its parallel computational abilities and low power usage, has become pivotal in advancing artificial intelligence. However, the advancement of neuromorphic computing has faced significant obstacles due to the performance limitations of traditional memory devices struggling with high power consumption and limited reliability. Two-dimensional (2D) materials have been extensively investigated as high-performance memristive materials, but they are often restricted by fixed memristive properties, which complicate circuit design and limit flexibility.
View Article and Find Full Text PDFPLoS One
June 2024
Faculty of Education, Yuzuncu Yil University, Van, Turkey.
Borophene nanosheets appear in various sizes and shapes, ranging from simple planar structures to complicated polyhedral formations. Due to their unique chemical, optical, and electrical properties, Borophene nanosheets are theoretically and practically attractive and because of their high thermal conductivity, boron nanosheets are suitable for efficient heat transmission applications. In this paper, temperature indices of borophene nanosheets are computed and these indices are employed in QSPR analysis of attributes like Young's modulus, Shear modulus, and Poisson's ratio of borophene nanosheets and borophene β12 sheets.
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