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Статті в журналах з теми "2D oxides"

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Автор: Grafiati

Опубліковано: 8 червня 2024

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1

Zhou, Yu, Jun Zhu, Dongyu Cai, and Yingchun Cheng. "The Possibility of Layered Non-Van Der Waals Boron Group Oxides: A First-Principles Perspective." Crystals 13, no. 9 (August 23, 2023): 1298. http://dx.doi.org/10.3390/cryst13091298.

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Two-dimensional (2D) metal oxides have broad prospective applications in the fields of catalysis, electronic devices, sensors, and detectors. However, non-van der Waals 2D metal oxides have rarely been studied because they are hard to peel off or synthesize. In this work, taking alumina (Al2O3) as a typical representative of 2D boron group oxides, the structural stability and electrical properties of 2D Al2O3 are investigated through first-principles calculations. The thinnest Al2O3 structure is a bilayer, and the band gap of Al2O3 is found to decrease with decreasing layer thickness because of the giant surface reconstruction. The band gap of bilayer X2O3 (X = Al, Ga, and In) decreases with increasing atomic radius. Our findings provide theoretical support for the preparation of non-van der Waals 2D boron group oxide semiconductors.

2

Förster, Stefan, Eva Zollner, Klaus Meinel, Renè Hammer, Martin Trautmann, and Wolf Widdra. "2D quasicrystals from perovskites." Acta Crystallographica Section A Foundations and Advances 70, a1 (August 5, 2014): C80. http://dx.doi.org/10.1107/s2053273314099197.

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Perovskite oxides represent a versatile class of materials with a simple cubic or pseudo-cubic crystal structure. The family of perovskite oxides contains insulators, metals, semiconductors, and superconductors with nearly identical lattice parameters. This structural equivalence additionally allows to combine perovskites with different properties in multilayer systems to produce functional materials with unique properties. We report here on the formation of a quasicrystal (QC) thin film on a threefold Pt(111) surface. This QC film is derived from the classical perovskite oxide BaTiO3 which is the most intensely studied ferroelectric perovskite oxide. An easily accessible ferroelectric to paraelectric phase transition at 400 K makes the material so interesting for basic and applied research. Due to matching lattice conditions BaTiO3 can be grown epitaxially on selected metal substrates. Periodic thin films of either BaTiO3(100) or BaTiO3(111) have been grown depending on substrate orientation and preparation conditions on Pt(001) and on Pt(111) [1, 2]. As we demonstrate here, astonishingly also a two-dimensional dodecagonal quasicrystalline structure can be formed by annealing an initially 1.4 nm thick BaTiO3 film on Pt(111) [3]. It develops at a temperature of 1250 K from a wetting layer spreading between a few thicker BaTiO3(111) islands. Surface sensitive electron diffraction (LEED) shows a bright and sharp pattern with dodecagonal symmetry. High-resolution scanning tunneling microscopy (STM) images reveal an arrangement of quadratic, triangular, and rhombic elements which compares well to a Gähler tiling. The development of higher-order self-similar structures is widely suppressed by a linear phason strain. This is supported by the fine structure of the diffraction data.

3

Li, Tao, Wen Yin, Shouwu Gao, Yaning Sun, Peilong Xu, Shaohua Wu, Hao Kong, Guozheng Yang, and Gang Wei. "The Combination of Two-Dimensional Nanomaterials with Metal Oxide Nanoparticles for Gas Sensors: A Review." Nanomaterials 12, no. 6 (March 16, 2022): 982. http://dx.doi.org/10.3390/nano12060982.

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Metal oxide nanoparticles have been widely utilized for the fabrication of functional gas sensors to determine various flammable, explosive, toxic, and harmful gases due to their advantages of low cost, fast response, and high sensitivity. However, metal oxide-based gas sensors reveal the shortcomings of high operating temperature, high power requirement, and low selectivity, which limited their rapid development in the fabrication of high-performance gas sensors. The combination of metal oxides with two-dimensional (2D) nanomaterials to construct a heterostructure can hybridize the advantages of each other and overcome their respective shortcomings, thereby improving the sensing performance of the fabricated gas sensors. In this review, we present recent advances in the fabrication of metal oxide-, 2D nanomaterials-, as well as 2D material/metal oxide composite-based gas sensors with highly sensitive and selective functions. To achieve this aim, we firstly introduce the working principles of various gas sensors, and then discuss the factors that could affect the sensitivity of gas sensors. After that, a lot of cases on the fabrication of gas sensors by using metal oxides, 2D materials, and 2D material/metal oxide composites are demonstrated. Finally, we summarize the current development and discuss potential research directions in this promising topic. We believe in this work is helpful for the readers in multidiscipline research fields like materials science, nanotechnology, chemical engineering, environmental science, and other related aspects.

4

Elmacı, Gökhan, Carolin E. Frey, Philipp Kurz, and Birgül Zümreoğlu-Karan. "Water oxidation catalysis by using nano-manganese ferrite supported 1D-(tunnelled), 2D-(layered) and 3D-(spinel) manganese oxides." Journal of Materials Chemistry A 4, no. 22 (2016): 8812–21. http://dx.doi.org/10.1039/c6ta00593d.

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5

Hu, Xiaozong, Kailang Liu, Yongqing Cai, Shuang-Quan Zang, and Tianyou Zhai. "2D Oxides for Electronics and Optoelectronics." Small Science 2, no. 8 (August 2022): 2270016. http://dx.doi.org/10.1002/smsc.202270016.

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6

Zhou, Wenhan, Shengli Zhang, and Haibo Zeng. "Perovskite oxides as a 2D dielectric." Nature Electronics 5, no. 4 (April 2022): 199–200. http://dx.doi.org/10.1038/s41928-022-00757-3.

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7

Parkinson, Gareth S. "Adding oxides to the 2D toolkit." Nature Materials 20, no. 8 (July 28, 2021): 1041–42. http://dx.doi.org/10.1038/s41563-021-01048-6.

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8

Lu, Yihua, and Xi Zhu. "Superbound Excitons in 2D Phosphorene Oxides." Journal of Physical Chemistry A 123, no. 1 (December 6, 2018): 21–25. http://dx.doi.org/10.1021/acs.jpca.8b09683.

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9

Zhang, Handing, Haoyu Zhang, Ruijing Wang, Jiayu Lv, Wugen Huang, Chenyan Guo, and Fan Yang. "Enhancing Oxygen Evolution Reaction with Two-Dimensional Nickel Oxide on Au (111)." Catalysts 14, no. 5 (April 23, 2024): 284. http://dx.doi.org/10.3390/catal14050284.

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The nature of the active sites of transition metal oxides during the oxygen evolution reaction (OER) has attracted much attention. Herein, we constructed well-defined nickel oxide/Au (111) model catalysts to study the relationship between the structures and their OER activity using scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS), electrochemical measurements, and density functional theory (DFT) calculations. The deposited nickel oxides on Au (111) were found to exhibit a two-dimensional (2D)/three-dimensional (3D) structure by regulating the annealing temperature. Combining STM, XPS and electrochemical measurements, our results demonstrated an optimal OER reactivity could be achieved for NiOx with a 2D structure on Au and provided a morphological description of the active phase during electrocatalysis.

10

Nikolic, Maria Vesna, Vladimir Milovanovic, Zorka Z. Vasiljevic, and Zoran Stamenkovic. "Semiconductor Gas Sensors: Materials, Technology, Design, and Application." Sensors 20, no. 22 (November 23, 2020): 6694. http://dx.doi.org/10.3390/s20226694.

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This paper presents an overview of semiconductor materials used in gas sensors, their technology, design, and application. Semiconductor materials include metal oxides, conducting polymers, carbon nanotubes, and 2D materials. Metal oxides are most often the first choice due to their ease of fabrication, low cost, high sensitivity, and stability. Some of their disadvantages are low selectivity and high operating temperature. Conducting polymers have the advantage of a low operating temperature and can detect many organic vapors. They are flexible but affected by humidity. Carbon nanotubes are chemically and mechanically stable and are sensitive towards NO and NH3, but need dopants or modifications to sense other gases. Graphene, transition metal chalcogenides, boron nitride, transition metal carbides/nitrides, metal organic frameworks, and metal oxide nanosheets as 2D materials represent gas-sensing materials of the future, especially in medical devices, such as breath sensing. This overview covers the most used semiconducting materials in gas sensing, their synthesis methods and morphology, especially oxide nanostructures, heterostructures, and 2D materials, as well as sensor technology and design, application in advance electronic circuits and systems, and research challenges from the perspective of emerging technologies.

11

Kumbhakar, Partha, Chinmayee Chowde Gowda, Preeti Lata Mahapatra, Madhubanti Mukherjee, Kirtiman Deo Malviya, Mohamed Chaker, Amreesh Chandra, et al. "Emerging 2D metal oxides and their applications." Materials Today 45 (May 2021): 142–68. http://dx.doi.org/10.1016/j.mattod.2020.11.023.

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12

Illarionov, Yury Yu, Theresia Knobloch, and Tibor Grasser. "Native high-k oxides for 2D transistors." Nature Electronics 3, no. 8 (August 2020): 442–43. http://dx.doi.org/10.1038/s41928-020-0464-2.

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13

Liu, Yun Fu, Zhao Hua Jiang, and Guo Hui Yuan. "Graphene and Metal Oxide Composites for Supercapacitors." Advanced Materials Research 608-609 (December 2012): 1074–77. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.1074.

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Graphene-metal oxide composites as supercapacitor electrodes combine the large pseudocapacitance of metal oxides with the fascinating electrical and mechanical properties and large surface area of graphene. The synthetic methods for composites are reviewed, including in-siu synthesis, solution mixing, hydrothermal method, microware irradiation and electrochemical deposition. Among these techniques, the hydrothermal method offers an effective and simple way to anchor metal oxides on the 2D graphene sheet uniformly. Consequently, the composites exhibit high capacity, high rate capability and well reversibility, presenting promising prospects as supercapacitor electrode material.

14

Yoo, Changhyeon, Tae-Jun Ko, Md Golam Kaium, Ricardo Martinez, Molla Manjurul Islam, Hao Li, Jung Han Kim, et al. "A minireview on 2D materials-enabled optoelectronic artificial synaptic devices." APL Materials 10, no. 7 (July 1, 2022): 070702. http://dx.doi.org/10.1063/5.0096053.

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Two-dimensional (2D) layered materials exhibit many unique properties, such as near-atomic thickness, electrical tunability, optical tunability, and mechanical deformability, which are characteristically distinct from conventional materials. They are particularly promising for next-generation biologically inspired optoelectronic artificial synapses, offering unprecedented opportunities beyond the current complementary metal–oxide–semiconductor-based computing device technologies. This Research update article introduces the recent exploration of various 2D materials for optoelectronic artificial synapses, such as graphene, transition metal dichalcogenides, black phosphorous, hexagonal boron nitride, MXenes, and metal oxides. Material property suitability and advantages of these 2D materials in implementing optoelectronic artificial synapses are discussed in detail. In addition, recent progress demonstrating 2D materials-enabled optoelectronic artificial synaptic devices is reviewed along with their device operation principles. Finally, pending challenges and forward-looking outlooks on this emerging research area are suggested.

15

Rives, V. "From 2D to 3D oxides: Layered Double Hydroxides." Acta Crystallographica Section A Foundations of Crystallography 56, s1 (August 25, 2000): s167. http://dx.doi.org/10.1107/s0108767300023813.

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16

Patrick, Chris. "Searching for stable 2D gallium and indium oxides." Scilight 2020, no. 29 (July 17, 2020): 291113. http://dx.doi.org/10.1063/10.0001655.

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17

Förster, Stefan, Sebastian Schenk, Eva Maria Zollner, Oliver Krahn, Cheng-Tien Chiang, Florian O. Schumann, Alireza Bayat, et al. "Quasicrystals and their Approximants in 2D Ternary Oxides." physica status solidi (b) 257, no. 7 (December 11, 2019): 1900624. http://dx.doi.org/10.1002/pssb.201900624.

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18

Lobinsky, A. A., and V. I. Popkov. "Ultrathin 2D nanosheets of transition metal (hydro)oxides as prospective materials for energy storage devices: A short review." Electrochemical Materials and Technologies 1, no. 1 (2022): 20221008. http://dx.doi.org/10.15826/elmattech.2022.1.008.

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The ultrathin two-dimensional (2D) transition metal oxides and hydroxides (TMO and TMH) nanosheets are attractive for creating high-performance energy storage devices due to a set of unique physical and chemical properties. Flat 2D structure of such materials provides a sufficient number of active adsorption centers, and the ultra-small thickness, on the order of several nanometers, provides fast charge transfer, which significantly improves electronic conductivity. This brief review summarizes recent progress in the synthesis of materials based on ultrathin 2D nanosheets for energy storage applications, including pseudocapacitors, lithium-ion batteries, and other rechargeable devices. The review also presents examples of representative work on the synthesis of ultrathin 2D nanomaterials based on TMO and TMH for various power sources. In conclusion, the article discusses possible prospects and directions for further development of methods and routes for the synthesis of ultrathin two-dimensional transition metal oxides and hydroxides.

19

Shinde, Pratik V., Rutuparna Samal, and Chandra Sekhar Rout. "Comparative Electrocatalytic Oxygen Evolution Reaction Studies of Spinel NiFe2O4 and Its Nanocarbon Hybrids." Transactions of Tianjin University 28, no. 1 (December 10, 2021): 80–88. http://dx.doi.org/10.1007/s12209-021-00310-x.

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AbstractElectrocatalytic oxygen evolution reaction (OER) is one of the crucial reactions for converting renewable electricity into chemical fuel in the form of hydrogen. To date, there is still a challenge in designing ideal cost-effective OER catalysts with excellent activity and robust durability. The hybridization of transition metal oxides and carbonaceous materials is one of the most effective and promising strategies to develop high-performance electrocatalysts. Herein, this work synthesized hybrids of NiFe2O4 spinel materials with two-dimensional (2D) graphene oxide and one-dimensional (1D) carbon nanotubes using a facile solvothermal approach. Electrocatalytic activities of NiFe2O4 with 2D graphene oxide toward OER were realized to be superior even to the 1D carbon nanotube-based electrocatalyst in terms of overpotential to reach a current density of 10 mA/cm2 as well as Tafel slopes. The NiFe2O4 with 2D graphene oxide hybrid exhibits good stability with an overpotential of 327 mV at a current density of 10 mA/cm2 and a Tafel slope of 103 mV/dec. The high performance of NiFe2O4 with 2D graphene oxide is mainly attributed to its unique morphology, more exposed active sites, and a porous structure with a high surface area. Thus, an approach of hybridizing a metal oxide with a carbonaceous material offers an attractive platform for developing an efficient electrocatalyst for water electrochemistry applications.

20

Taniguchi, Takaaki, Leanddas Nurdiwijayanto, Renzhi Ma, and Takayoshi Sasaki. "Chemically exfoliated inorganic nanosheets for nanoelectronics." Applied Physics Reviews 9, no. 2 (June 2022): 021313. http://dx.doi.org/10.1063/5.0083109.

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Two-dimensional (2D) nanomaterials constitute one of the most advanced research targets in materials science and engineering in this century. Among various methods for the synthesis of 2D nanomaterials, including top-down exfoliation and bottom-up crystal growth, chemical exfoliation has been widely used to yield monolayers of various layered compounds, such as clay minerals, transition metal chalcogenides (TMDCs), and oxides, long before the discovery of graphene. Soft chemical exfoliation is a technique to weaken the layer-to-layer interaction in layered compounds by chemical modification of interlayer galleries, which promotes monolayer exfoliation. The chemical exfoliation process using organic substances, typically amines, has been applied to a range of layered metal oxides and hydroxides for two decades, establishing high-yield exfoliation into their highly crystalline monolayers and colloidal integration processes have been developed to assemble the resultant 2D nanomaterials into well-organized nanoscale devices. Recently, such a strategy was found to be effective for TMDC and MXene nanosheets, expanding the lineup of functionalities of solution-processed 2D nanomaterial devices from dielectrics, optics, magnetics, and semiconductors to superconductors. Throughout this review, we share the historical research flow, recent progress, and prospects in the development of soft-chemical exfoliation, colloidal integration, and thin film applications of oxides, TMDC, and MXene nanosheets.

21

Seok, Dohyeong, Yohan Jeong, Kyoungho Han, Do Young Yoon, and Hiesang Sohn. "Recent Progress of Electrochemical Energy Devices: Metal Oxide–Carbon Nanocomposites as Materials for Next-Generation Chemical Storage for Renewable Energy." Sustainability 11, no. 13 (July 5, 2019): 3694. http://dx.doi.org/10.3390/su11133694.

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With the importance of sustainable energy, resources, and environmental issues, interest in metal oxides increased significantly during the past several years owing to their high theoretical capacity and promising use as electrode materials for electrochemical energy devices. However, the low electrical conductivity of metal oxides and their structural instability during cycling can degrade the battery performance. To solve this problem, studies on carbon/metal-oxide composites were carried out. In this review, we comprehensively discuss the characteristics (chemical, physical, electrical, and structural properties) of such composites by categorizing the structure of carbon in different dimensions and discuss their application toward electrochemical energy devices. In particular, one-, two-, and three-dimensional (1D, 2D, and 3D) carbon bring about numerous advantages to a carbon/metal-oxide composite owing to the unique characteristics of each dimension.

22

Scheideler, William J., and Vivek Subramanian. "How to print high-mobility metal oxide transistors—Recent advances in ink design, processing, and device engineering." Applied Physics Letters 121, no. 22 (November 28, 2022): 220502. http://dx.doi.org/10.1063/5.0125055.

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High-throughput printing-based fabrication has emerged as a key enabler of flexible electronics given its unique capability for low-cost integration of circuits based on printed thin film transistors (TFTs). Research in printing inorganic metal oxides has revealed the potential for fabricating oxide TFTs with an unmatched combination of high electron mobility and optical transparency. Here, we highlight recent developments in ink chemistry, printing physics, and material design for high-mobility metal oxide transistors. We consider ongoing challenges for this field that include lowering process temperatures, achieving high speed and high resolution printing, and balancing device performance with the need for high mechanical flexibility. Finally, we provide a roadmap for overcoming these challenges with emerging synthetic strategies for fabricating 2D oxides and complementary TFT circuits for flexible electronics.

23

Azhar, Alowasheeir, Christine Young, Yusuf Kaneti, Yusuke Yamauchi, Ahmad Badjah, Mu Naushad, Mohamed Habila, Saikh Wabaidur, Zeid Alothman, and Jeonghun Kim. "Cyano-Bridged Cu-Ni Coordination Polymer Nanoflakes and Their Thermal Conversion to Mixed Cu-Ni Oxides." Nanomaterials 8, no. 12 (November 23, 2018): 968. http://dx.doi.org/10.3390/nano8120968.

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Herein, we demonstrate the bottom-up synthesis of 2D cyano-bridged Cu-Ni coordination polymer (CP) nanoflakes through a controlled crystallization process and their conversion to Cu-Ni mixed oxides via a thermal treatment in air. The chelating effect of citrate anions effectively prevents the rapid coordination reaction between Cu2+ and K2[Ni(CN)4], resulting in the deceleration of the crystallization process of CPs. Specifically, with addition of trisodium citrate dehydrate, the number of nuclei formed at the early stage of the reaction is decreased. Less nuclei undergo a crystal growth by interacting with [Ni(CN)4]2−, leading to the formation of larger Cu-Ni CP nanoflakes. Following heat treatment in air, the -CN- groups present within the CP nanoflakes are removed and nanoporous Cu-Ni mixed oxide nanoflakes are generated. When tested as an electrode material for supercapacitors using a three-electrode system, the optimum Cu-Ni mixed oxide sample shows a maximum specific capacitance of 158 F g−1 at a current density of 1 A g−1. It is expected that the proposed method will be useful for the preparation of other types of 2D and 3D CPs as precursors for the creation of various nanoporous metal oxides.

24

Maciulis, Vincentas, Almira Ramanaviciene, and Ieva Plikusiene. "Recent Advances in Synthesis and Application of Metal Oxide Nanostructures in Chemical Sensors and Biosensors." Nanomaterials 12, no. 24 (December 10, 2022): 4413. http://dx.doi.org/10.3390/nano12244413.

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Nanostructured materials formed from metal oxides offer a number of advantages, such as large surface area, improved mechanical and other physical properties, as well as adjustable electronic properties that are important in the development and application of chemical sensors and biosensor design. Nanostructures are classified using the dimensions of the nanostructure itself and their components. In this review, various types of nanostructures classified as 0D, 1D, 2D, and 3D that were successfully applied in chemical sensors and biosensors, and formed from metal oxides using different synthesis methods, are discussed. In particular, significant attention is paid to detailed analysis and future prospects of the synthesis methods of metal oxide nanostructures and their integration in chemical sensors and biosensor design.

25

Atkin, P., R. Orrell-Trigg, A. Zavabeti, N. Mahmood, M. R. Field, T. Daeneke, I. S. Cole, and K. Kalantar-zadeh. "Evolution of 2D tin oxides on the surface of molten tin." Chemical Communications 54, no. 17 (2018): 2102–5. http://dx.doi.org/10.1039/c7cc09040d.

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26

Yin, Huabing, Guang-Ping Zheng, Jingwei Gao, Yuanxu Wang, and Yuchen Ma. "Enhanced piezoelectricity of monolayer phosphorene oxides: a theoretical study." Phys. Chem. Chem. Phys. 19, no. 40 (2017): 27508–15. http://dx.doi.org/10.1039/c7cp05669a.

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27

Xie, Huaguang, Zhong Li, Liang Cheng, Azhar Ali Haidry, Jiaqi Tao, Yi Xu, Kai Xu, and Jian Zhen Ou. "Recent advances in the fabrication of 2D metal oxides." iScience 25, no. 1 (January 2022): 103598. http://dx.doi.org/10.1016/j.isci.2021.103598.

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28

BOULAHYA, K. "Structural relationships between 2D and 3D Ba?Mn oxides." Solid State Ionics 172, no. 1-4 (August 2004): 543–47. http://dx.doi.org/10.1016/j.ssi.2004.01.058.

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29

Barcaro, Giovanni, and Alessandro Fortunelli. "2D oxides on metal materials: concepts, status, and perspectives." Physical Chemistry Chemical Physics 21, no. 22 (2019): 11510–36. http://dx.doi.org/10.1039/c9cp00972h.

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30

Tan, Hui Teng, Wenping Sun, Libo Wang, and Qingyu Yan. "2D Transition Metal Oxides/Hydroxides for Energy-Storage Applications." ChemNanoMat 2, no. 7 (December 23, 2015): 562–77. http://dx.doi.org/10.1002/cnma.201500177.

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31

Rödel, Tobias Chris, Franck Fortuna, Shamashis Sengupta, Emmanouil Frantzeskakis, Patrick Le Fèvre, François Bertran, Bernard Mercey, et al. "Universal Fabrication of 2D Electron Systems in Functional Oxides." Advanced Materials 28, no. 10 (January 11, 2016): 1976–80. http://dx.doi.org/10.1002/adma.201505021.

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32

Hinterding, Richard, and Armin Feldhoff. "Two-Dimensional Oxides: Recent Progress in Nanosheets." Zeitschrift für Physikalische Chemie 233, no. 1 (December 19, 2018): 117–65. http://dx.doi.org/10.1515/zpch-2018-1125.

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Abstract Two-dimensional (2D) materials have been widely investigated for the last few years, introducing nanosheets and ultrathin films. The often superior electrical, optical and mechanical properties in contrast to their three-dimensional (3D) bulk counterparts offer a promising field of opportunities. Especially new research fields for already existing and novel applications are opened by downsizing and improving the materials at the same time. Some of the most promising application fields are namely supercapacitors, electrochromic devices, (bio-) chemical sensors, photovoltaic devices, thermoelectrics, (photo-) catalysts and membranes. The role of oxides in this field of materials deserves a closer look due to their availability, durability and further advantages. Here, recent progress in oxidic nanosheets is highlighted and the benefit of 2D oxides for applications discussed in-depth. Therefore, different synthesis techniques and microstructures are compared more closely.

33

Pietrusiewicz, K. Michał, Anna E. Kozioł, Hanna Małuszyńska, and Sylwia Sowa. "Myrtenal and Myrtanal as Auxiliaries in the Synthesis of Some C,P-Stereogenic Hydroxyphosphine Oxides and Hydroxyphosphine-Boranes Possessing up to Four Contiguous Centers of Chirality." Symmetry 15, no. 6 (May 30, 2023): 1172. http://dx.doi.org/10.3390/sym15061172.

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1,4- and 1,2-additons of secondary phosphine oxides to (1R)-myrtenal and (1S)-myrtanal were evaluated as potential routes to P,C-stereogenic phosphine oxides bearing additional hydroxyl or aldehyde functions. 1,4-Additions of racemic secondary phosphine oxides to (1R)-myrtenal were found to offer moderate to good stereoselectivity which shows some promise for utility in kinetic resolution processes, especially at lower conversions. In case of 1,2-additions making the process doubly asymmetric by using an enantiomerically pure secondary phosphine oxide as substrate turned out to be practical. The stereochemical course of the addition reactions under study is presented. The P-resolved 1,2-addition products were demonstrated to undergo facile reduction by BH3 at room temperature leading to the formation of the corresponding α-hydroxyphosphine-boranes with clean inversion of configuration at the P-centre. All P,C-stereogenic phosphine oxides and boranes that were isolated in the form of a single diastereoisomer were assigned their absolute configurations by means of X-ray crystallography and/or 2D NMR spectral techniques.

34

Li, Menghan, Lin Li, Yixuan Fan, Le Huang, Dechao Geng, and Wensheng Yang. "Controlled growth of 2D ultrathin Ga2O3 crystals on liquid metal." Nanoscale Advances 3, no. 15 (2021): 4411–15. http://dx.doi.org/10.1039/d1na00375e.

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Barcaro, Giovanni, and Alessandro Fortunelli. "Correction: 2D oxides on metal materials: concepts, status, and perspectives." Physical Chemistry Chemical Physics 23, no. 21 (2021): 12495. http://dx.doi.org/10.1039/d1cp90104d.

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Averyanov, Dmitry V., Ivan S. Sokolov, Igor A. Karateev, Alexander N. Taldenkov, Oleg A. Kondratev, Oleg E. Parfenov, Andrey M. Tokmachev, and Vyacheslav G. Storchak. "Interface-controlled integration of functional oxides with Ge." Journal of Materials Chemistry C 9, no. 47 (2021): 17012–18. http://dx.doi.org/10.1039/d1tc04225d.

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Seo, Youkyung, Soo Yeon Kim, Yeeun Kim, Chulmin Kim, Byung Chul Lee, Yoon Hee Park, Minji Chae, et al. "Hidden surface channel in two-dimensional multilayers." 2D Materials 9, no. 3 (April 13, 2022): 035004. http://dx.doi.org/10.1088/2053-1583/ac6343.

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Abstract Numerous carrier scatterers, such as atomic defects, fixed oxide charges, impurities, chemical residues, and undesired surface adsorbates, including oxygen and water molecules, strongly degrade the carrier mobility of atomically thin two-dimensional (2D) materials. However, the effect of surface adsorbates and surface oxidation on the carrier density profile along the thickness of 2D multilayers is not well known, particularly for a substantial interruption in the formation of the top-surface channel. Here, we uncover a hidden surface channel in p-type black phosphorus and n-type rhenium disulfide multilayers originating from undesired ambient adsorbates and surface oxides that not only populate hole density (or reduce electron density) but also suppress carrier mobility. The absence of a second peak in the transconductance curve under ambient conditions indicates the disappearance of the top-surface channel inside the 2D multilayers, which is a possible indicator for the cleanliness of the top surface and can be used in gas sensor applications. Moreover, the negligible variation in the drain bias polarity-dependent turn-on voltage for the bottom channel under ambient conditions validates the exclusive contribution of surface adsorbates to the formation of the top channel in 2D multilayers. Our results provide a novel insight into the distinct carrier transport in 2D optoelectronic devices and diverse sensors.

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S. Mofarah, Sajjad, Esmaeil Adabifiroozjaei, Yuan Wang, Hamidreza Arandiyan, Raheleh Pardehkhorram, Yin Yao, M. Hussein N. Assadi, et al. "Assembly of cerium-based coordination polymer into variant polycrystalline 2D–3D CeO2−x nanostructures." Journal of Materials Chemistry A 8, no. 9 (2020): 4753–63. http://dx.doi.org/10.1039/c9ta11961b.

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39

Watson, Carla, Tara Peña, Marah Abdin, Tasneem Khan, and Stephen M. Wu. "Dynamic adhesion of 2D materials to mixed-phase BiFeO₃ structural phase transitions." Journal of Applied Physics 132, no. 4 (July 28, 2022): 045301. http://dx.doi.org/10.1063/5.0096686.

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Two-dimensional materials, such as transition metal dichalcogenides, have generated much interest due to their strain-sensitive electronic, optical, magnetic, superconducting, or topological properties. Harnessing control over their strain state may enable new technologies that operate by controlling these materials’ properties in devices such as straintronic transistors. Piezoelectric oxides have been proposed as one method to control such strain states on the device scale. However, there are few studies of how conformal 2D materials remain on oxide materials with respect to dynamic applications of the strain. Non-conformality may lead to non-optimal strain transfer. In this work, we explore this aspect of oxide-2D adhesion in the nanoscale switching of the substrate structural phase in thin 1T′-MoTe2 attached to a mixed-phase thin-film BiFeO3 (BFO), a multiferroic oxide with an electric-field induced structural phase transition that can generate mechanical strains of up to 2%. We observe that flake thickness impacts the conformality of 1T′-MoTe2 to structural changes in BFO, but below four layers, 1T′-MoTe2 fully conforms to the nanoscale BFO structural changes. The conformality of few-layer 1T′-MoTe2 suggests that BFO is an excellent candidate for deterministic, nanoscale strain control for 2D materials.

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Liu, Wei, Qun Xu, and Yannan Zhou. "CO2-assisted fabrication of two-dimensional amorphous transition metal oxides." Dalton Transactions 49, no. 7 (2020): 2048–52. http://dx.doi.org/10.1039/c9dt04651h.

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41

Bobrinetskiy, Ivan, Marko Radovic, Francesco Rizzotto, Priya Vizzini, Stefan Jaric, Zoran Pavlovic, Vasa Radonic, Maria Vesna Nikolic, and Jasmina Vidic. "Advances in Nanomaterials-Based Electrochemical Biosensors for Foodborne Pathogen Detection." Nanomaterials 11, no. 10 (October 13, 2021): 2700. http://dx.doi.org/10.3390/nano11102700.

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Electrochemical biosensors utilizing nanomaterials have received widespread attention in pathogen detection and monitoring. Here, the potential of different nanomaterials and electrochemical technologies is reviewed for the development of novel diagnostic devices for the detection of foodborne pathogens and their biomarkers. The overview covers basic electrochemical methods and means for electrode functionalization, utilization of nanomaterials that include quantum dots, gold, silver and magnetic nanoparticles, carbon nanomaterials (carbon and graphene quantum dots, carbon nanotubes, graphene and reduced graphene oxide, graphene nanoplatelets, laser-induced graphene), metal oxides (nanoparticles, 2D and 3D nanostructures) and other 2D nanomaterials. Moreover, the current and future landscape of synergic effects of nanocomposites combining different nanomaterials is provided to illustrate how the limitations of traditional technologies can be overcome to design rapid, ultrasensitive, specific and affordable biosensors.

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Nagy, Áron Kázmér, Judit Pfeifer, István Endre Lukács, Attila Lajos Tóth, and Csaba Balázsi. "Electrospinning – A Candidate for Fabrication of Semiconducting Tungsten Oxide Nanofibers." Materials Science Forum 659 (September 2010): 215–19. http://dx.doi.org/10.4028/www.scientific.net/msf.659.215.

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The excellent gas sensing properties of the tungsten oxides have been manifested first of all in nanostructure and 1D, and 2D open structured forms. For optimal performance the sensing layer substrates should be of large specific surface. In this paper we report on electrospinning – a candidate for fabrication of large specific surface tungsten oxide nanofibers. Fibrous tissues doped with tungstic acid hydrate (H2WO4.H2O) and tungsten oxide one third hydrate (WO3.1/3H2O) has been created and characterized by X-ray diffraction, scanning electron microscope and energy dispersive spectroscopy in order to learn about the changes the materials suffer during the process.

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Ghosh, Shilpi, Shankha S. Acharyya, Malika Kumar, and Rajaram Bal. "Chloride promoted room temperature preparation of silver nanoparticles on two dimensional tungsten oxide nanoarchitectures for the catalytic oxidation of tertiary N-compounds to N-oxides." Nanoscale 7, no. 37 (2015): 15197–208. http://dx.doi.org/10.1039/c5nr02510a.

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Chen, Zongkun, Minghua Huang, and Helmut Cölfen. "Synthesis of ultrathin metal oxide and hydroxide nanosheets using formamide in water at room temperature." CrystEngComm 23, no. 21 (2021): 3794–801. http://dx.doi.org/10.1039/d1ce00277e.

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45

Singh, Arunima, Manjari Jain, and Saswata Bhattacharya. "MoS2 and Janus (MoSSe) based 2D van der Waals heterostructures: emerging direct Z-scheme photocatalysts." Nanoscale Advances 3, no. 10 (2021): 2837–45. http://dx.doi.org/10.1039/d1na00154j.

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Two-dimensional (2D) materials, viz. transition metal dichalcogenides (TMD) and transition metal oxides (TMO), offer a platform that allows the creation of heterostructures with a variety of properties.

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Alsaif, Manal M. Y. A., Matthew R. Field, Billy J. Murdoch, Torben Daeneke, Kay Latham, Adam F. Chrimes, Ahmad Sabirin Zoolfakar, Salvy P. Russo, Jian Zhen Ou, and Kourosh Kalantar-zadeh. "Substoichiometric two-dimensional molybdenum oxide flakes: a plasmonic gas sensing platform." Nanoscale 6, no. 21 (2014): 12780–91. http://dx.doi.org/10.1039/c4nr03073g.

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Two-dimensional (2D) molybdenum oxides at their various stoichiometries are promising candidates for generating plasmon resonances in visible light range and hence form efficient plasmonic gas sensing platforms.

47

Ren, Baiyu, Yichao Wang, and Jian Zhen Ou. "Engineering two-dimensional metal oxides via surface functionalization for biological applications." Journal of Materials Chemistry B 8, no. 6 (2020): 1108–27. http://dx.doi.org/10.1039/c9tb02423a.

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48

Zhang, Chi, Junyang Tan, Yikun Pan, Xingke Cai, Xiaolong Zou, Hui-Ming Cheng, and Bilu Liu. "Mass production of 2D materials by intermediate-assisted grinding exfoliation." National Science Review 7, no. 2 (October 21, 2019): 324–32. http://dx.doi.org/10.1093/nsr/nwz156.

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Abstract The scalable and high-efficiency production of 2D materials is a prerequisite to their commercial use. Currently, only graphene and graphene oxide can be produced on a ton scale, and the inability to produce other 2D materials on such a large scale hinders their technological applications. Here we report a grinding exfoliation method that uses micro-particles as force intermediates to resolve applied compressive forces into a multitude of small shear forces, inducing the highly efficient exfoliation of layer materials. The method, referred to as intermediate-assisted grinding exfoliation (iMAGE), can be used for the large-scale production of many 2D materials. As an example, we have exfoliated bulk h-BN into 2D h-BN with large flake sizes, high quality and structural integrity, with a high exfoliation yield of 67%, a high production rate of 0.3 g h−1 and a low energy consumption of 3.01 × 106 J g−1. The production rate and energy consumption are one to two orders of magnitude better than previous results. Besides h-BN, this iMAGE technology has been used to exfoliate various layer materials such as graphite, black phosphorus, transition metal dichalcogenides, and metal oxides, proving its universality. Molybdenite concentrate, a natural low-cost and abundant mineral, was used as a demo for the large-scale exfoliation production of 2D MoS2 flakes. Our work indicates the huge potential of the iMAGE method to produce large amounts of various 2D materials, which paves the way for their commercial application.

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Reuter, Hans, and Martin Reichelt. "Reaction products of diorganotin(IV) oxides, R2SnO, with nitric acid. Part 2 – R = n-butyl and t-butyl." Canadian Journal of Chemistry 92, no. 6 (June 2014): 484–95. http://dx.doi.org/10.1139/cjc-2013-0514.

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The reaction of diorganotin(IV) oxides, R2SnO with R = n-butyl and t-butyl, with nitric acid in different stoichiometric ratios resulted in the formation of different products depending on the organic groups attached to the tin atom: the diorganotin(IV) dinitrate dihydrates, n-Bu2Sn(NO3)2·2H2O (2d) and t-Bu2Sn(NO3)2·2H2O (2e), the mixed diorganotin(IV) nitrate methoxide oxide n-Bu2Sn(NO3)(n-Bu2SnOMe)O (6), and the diorganotin(IV) nitrate hydroxide hydrate t-Bu2Sn(NO3)(OH)·H2O = [t-Bu2Sn(OH)(H2O)][NO3] (7). On examination of the solubility of the primary reaction products in different solvents, the three additional compounds t-Bu2Sn(NO3)(OH)·DMSO (8), t-Bu2Sn(NO3)(OH)·THF, and 2-t-Bu2Sn(NO3)(OH)·DMF = [t-Bu2Sn(OH)dmf]2[NO3]2·[t-Bu2Sn(NO3)OH]2 (9) could be isolated. All compounds have been structurally characterized by single crystal X-ray diffraction (primary results for 7) with special attention paid to dimensionality (2d and 2c = monomeric, hydrogen bonded molecules; 6 = dimeric molecules of ladder-type structure; 7 = dimeric cation; 8 = dimeric molecule with hydrogen bonded solvent molecules; 9 = both components dimeric), tin coordination (6, 7, 8, and 9 = trigonal bipyramidal; 2d and 2e = eightfold), and nitrate bonding modes (7 and 9 = isolated, hydrogen bonded; 6, 8, and 9 (component 2) = monodentate; 2d and 2e = symmetrical bidentate), the latter one being analyzed using both Sn–O and N–O distances.

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Zhang, Jian, Xiaoyue Zhang, and Sai Bi. "Two-Dimensional Quantum Dot-Based Electrochemical Biosensors." Biosensors 12, no. 4 (April 17, 2022): 254. http://dx.doi.org/10.3390/bios12040254.

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Two-dimensional quantum dots (2D-QDs) derived from two-dimensional sheets have received increasing interest owing to their unique properties, such as large specific surface areas, abundant active sites, good aqueous dispersibility, excellent electrical property, easy functionalization, and so on. A variety of 2D-QDs have been developed based on different materials including graphene, black phosphorus, nitrides, transition metal dichalcogenides, transition metal oxides, and MXenes. These 2D-QDs share some common features due to the quantum confinement effects and they also possess unique properties owing to their structural differences. In this review, we discuss the categories, properties, and synthetic routes of these 2D-QDs and emphasize their applications in electrochemical biosensors. We deeply hope that this review not only stimulates more interest in 2D-QDs, but also promotes further development and applications of 2D-QDs in various research fields.