Recent Advances in Noncontact External-Field-Assisted Photocatalysis: From Fundamentals to Applications

ACS Catalysis, Год журнала: 2021, Номер 11(8), С. 4739 - 4769

Опубликована: Апрель 5, 2021

The effective separation of photogenerated carriers plays a vital role in photocatalytic reactions. In addition to the intrinsic driving force photocatalysis, an external field generating enhancement effect can provide extra energy system, acting as additional impetus separate charges and thus improving overall catalytic efficiency. Under favorable noncontact conditions, exploring field, different from pure photocatalysis or photoelectrocatalysis, could widen applications technology. this review, four typical fields (i.e., thermal, magnetic, microwave, ultrasonic fields) their coupling effects on are summarized. Specifically, review focuses mechanism characteristics each field's synergistic performance system. charge forces provided by traditional one distinguished defined for first time. challenges future prospects external-field-driven discussed. We hope that will reference research development external-field-assisted give insights in-depth study external-field-coupling-enhanced toward improvement

Язык: Английский

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Recent Developments in van der Waals Antiferromagnetic 2D Materials: Synthesis, Characterization, and Device Implementation

ACS Nano, Год журнала: 2021, Номер 15(11), С. 17175 - 17213

Опубликована: Ноя. 15, 2021

Magnetism in two dimensions is one of the most intriguing and alluring phenomena condensed matter physics. Atomically thin 2D materials have emerged as a promising platform for exploring magnetic properties, leading to development essential technologies such supercomputing data storage. Arising from spin charge dynamics elementary particles, magnetism has also unraveled advances spintronic devices spin-dependent optoelectronics photonics. Recently, antiferromagnetism received extensive attention, significant their understanding emerging applications; zero net moment yet are internally magnetic. Several theoretical experimental approaches been proposed probe, characterize, modulate states efficiently systems. This Review presents latest developments current status tuning properties distinct van der Waals antiferromagnets. Various state-of-the-art optical techniques deployed investigate textures discussed. Furthermore, device concepts based on antiferromagnetic spintronics scrutinized. We conclude with remarks related challenges technological outlook this rapidly expanding field.

Язык: Английский

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Coexisting Phases in Transition Metal Dichalcogenides: Overview, Synthesis, Applications, and Prospects

ACS Nano, Год журнала: 2024, Номер 18(4), С. 2708 - 2729

Опубликована: Янв. 22, 2024

Over the past decade, significant advancements have been made in phase engineering of two-dimensional transition metal dichalcogenides (TMDCs), thereby allowing controlled synthesis various phases TMDCs and facile conversion between them. Recently, there has emerging interest TMDC coexisting phases, which contain multiple within one nanostructured TMDC. By taking advantage merits from component offer enhanced performance many aspects compared with single-phase TMDCs. Herein, this review article thoroughly expounds latest progress ongoing efforts on syntheses, properties, applications phases. The introduction section overviews main (2H, 3R, 1T, 1T′, 1Td), along advantages coexistence. subsequent focuses methods for TMDCs, particular attention to local patterning random formations. Furthermore, basis versatile properties their magnetism, valleytronics, field-effect transistors, memristors, catalysis are discussed. Lastly, a perspective is presented future development, challenges, potential opportunities This aims provide insights into 2D materials both scientific communities contribute further field.

Язык: Английский

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Moiré superlattices and related moiré excitons in twisted van der Waals heterostructures

Chemical Society Reviews, Год журнала: 2021, Номер 50(11), С. 6401 - 6422

Опубликована: Янв. 1, 2021

Recent advances in moiré superlattices and excitons, such as quantum emission arrays, low-energy flat bands, Mott insulators, have rapidly attracted attention the fields of optoelectronics, materials, energy research. The interlayer twist turns into a degree freedom that alters properties systems realization excitons also offers feasibility making artificial exciton crystals. Moreover, exhibit many exciting under regulation various external conditions, including spatial polarisation, alternating dipolar to moments gate-dependence gate voltage dependence; all are pertinent their applications nano-photonics information. But lag theoretical development low-efficiency processing technologies significantly limit potential superlattice applications. In this review, we systematically summarise discuss recent progress analyze current challenges, put forward relevant recommendations. There is no doubt further research will lead breakthroughs application promote reforms innovations traditional solid-state physics materials science.

Язык: Английский

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Germanium‐based monoelemental and binary two‐dimensional materials: Theoretical and experimental investigations and promising applications

InfoMat, Год журнала: 2022, Номер 4(11)

Опубликована: Сен. 22, 2022

Abstract Two‐dimensional (2D) materials based on group IVA elements have attracted extensive attention owing to their rich chemical structures and novel properties. This comprehensive review focuses the phases of Ge monoelemental binary 2D including germanene its derivatives, Ge‐IVA compounds, Ge‐VA Ge‐VIA compounds. The latest progress in predictive modeling, fabrication, fundamental physical property modulation stable configurations are presented. Accordingly, various interesting applications these Ge‐based discussed, particularly field effect transistors, photodetectors, optical devices, catalysts, energy storage solar cells, thermoelectric sensors, biomedical materials, spintronic devices. Finally, this concludes with a few perspectives an outlook for quickly expanding application scope recent developments. image

Язык: Английский

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Improving machine-learning models in materials science through large datasets

Materials Today Physics, Год журнала: 2024, Номер 48, С. 101560 - 101560

Опубликована: Сен. 25, 2024

Язык: Английский

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Spintronic Devices upon 2D Magnetic Materials and Heterojunctions

ACS Nano, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

In spintronics, there has been increasing interest in two-dimensional (2D) magnetic materials. The well-defined layered crystalline structure, interface conditions, and van der Waals stacking of these materials offer advantages for the development high-performance spintronic devices. Spin–orbit torque (SOT) devices tunneling magnetoresistance (TMR) effect based on have emerged as prominent research areas. SOT utilizing 2D can efficiently achieve SOT-driven magnetization switching by modulating interaction between spin orbital degrees freedom. Notably, crystal structure symmetry breaking heterojunctions leads to field-free perpendicular an extremely low current density down 106 A/cm2. This review provides a comprehensive overview construction, measurement, mechanisms heterojunctions. TMR observed also exhibits significant potential various applications. Specifically, spin-filter A-type antiferromagnets led giant ratios approaching 19,000%. Here, we physical underlying effect, along with design such tunnel junctions (MTJ) valves. summarizes different structural types key factors that enhance values. These advanced show promising prospects fields storage. We highlight advancements integration SOT, MTJ, valve devices, which high-density storage capability, low-power computing, fast data transmission rates Magnetic Random Access Memory logic integrated circuits. are expected revolutionize future developments information technology.

Язык: Английский

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Quantification of Chirality Induced Spin–Orbit Coupling for Long Spin Polarized Lifetime in Hybrid Perovskite

The Journal of Physical Chemistry Letters, Год журнала: 2025, Номер 16(9), С. 2378 - 2384

Опубликована: Фев. 26, 2025

Long spin lifetimes are crucial for maintaining robust states during propagation in spintronic devices. Spin-orbit coupling (SOC) chiral hybrid perovskites can induce chirality-dependent splitting, facilitating the manipulation of polarization. In this study, we introduce a organic molecule, (R/S)-4-(aminoethyl)piperidinium (4AEP), into iodide-lead-based structures to synthesize [(R/S)-4AEP]PbI4 crystals and thin films. Using circularly polarized pump-probe techniques, examine carrier dynamics [(R/S)-4AEP]PbI4. Our results demonstrate that chirality-induced splitting significantly enhances spin-polarization lifetime, achieving approximately 130 meV at valence band maximum exceeding 1 ns. Density functional theory (DFT) calculations reveal opposite exist R- S-chiral samples with substantial splitting. These findings highlight potential spintronics applications.

Язык: Английский

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Magnetic Properties of Layered Hybrid Organic‐Inorganic Metal‐Halide Perovskites: Transition Metal, Organic Cation and Perovskite Phase Effects

Advanced Functional Materials, Год журнала: 2022, Номер 32(51)

Опубликована: Окт. 3, 2022

Understanding the structural and magnetic properties in layered hybrid organic-inorganic metal halide perovskites (HOIPs) is key for their design integration spin-electronic devices. Here, we have conducted a systematic study on ten compounds to understand effect of transition (Cu$^{2+}$, Mn$^{2+}$, Co$^{2+}$), organic spacer (alkyl- aryl-ammonium) perovskite phase (Ruddlesden-Popper Dion-Jacobson) these materials. Temperature-dependent Raman measurements show that crystals' transitions are triggered by motional freedom cations as well flexibility inorganic metal-halide lattice. In case Cu$^{2+}$ HOIPs, an increase in-plane anisotropy reduction octahedra interlayer distance found change behavior HOIP from 2D ferromagnet quasi-3D antiferromagnet. Mn$^{2+}$ HOIPs inherent antiferromagnetic intralayer interactions phenomenologically rich magnetism, presenting spin-canting, spin-flop metamagnetism controlled crystal anisotropy. Co$^{2+}$ crystals with non-linked tetrahedra dominant paramagnetic irrespective phase. This work demonstrates chemical can be exploited develop novel materials tailored properties.

Язык: Английский

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Potential of MXenes as a novel material for spintronic devices: a review

Physical Chemistry Chemical Physics, Год журнала: 2023, Номер 25(28), С. 18584 - 18608

Опубликована: Янв. 1, 2023

The explosive development of MXenes for example by tuning the bandgap and wakening their magnetic properties could simply pave way integration in device configurations suitable spintronic devices.

Язык: Английский

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