Optically Active MXenes in Van der Waals Heterostructures

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(42)

Published: Sept. 15, 2023

The vertical integration of distinct 2D materials in van der Waals (vdW) heterostructures provides the opportunity for interface engineering and modulation electronic as well optical properties. However, scarce experimental studies reveal many challenges vdW heterostructures, hampering fine-tuning their functionalities. Optically active MXenes, most recent member family, with excellent hydrophilicity, rich surface chemistry, intriguing properties, are a novel platform optoelectronics applications. Coupling MXenes various into can open new avenues exploration physical phenomena quantum-confined nanostructures devices. Therefore, fundamental basis findings composed primary component other secondary components examined. Their robust designs synthesis approaches that push boundaries light-harvesting, transition, utilization discussed, since provide unique playground pursuing an extraordinary response or unusual light conversion features/functionalities. finally summarized, perspective future development next-generation multifunctional enriched by is provided.

Language: Английский

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Discovery of Two‐dimensional Hexagonal MBene HfBO and Exploration on its Potential for Lithium‐Ion Storage

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(36)

Published: July 14, 2023

The practical applications of two-dimensional (2D) transition-metal borides (MBenes) have been severely hindered by the lack accessible MBenes because difficulties in selective etching traditional ternary MAB phases with orthorhombic symmetry (ort-MAB). Here, we discover a family hexagonal (h-MAB) and 2D (h-MBenes) ab initio predictions experiments. Calculations suggest that h-MAB are more suitable precursors for than ort-MAB phases. Based on prediction, report experimental synthesis h-MBene HfBO removal In from Hf2 InB2 . synthesized delivered specific capacity 420 mAh g-1 as an anode material lithium-ion batteries, demonstrating potential energy-storage applications. discovery this added new member to growing materials provided opportunities wide range novel

Language: Английский

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Two-dimensional MBenes with ordered metal vacancies for surface-enhanced Raman scattering

Nanoscale, Journal Year: 2023, Volume and Issue: 15(6), P. 2779 - 2787

Published: Jan. 1, 2023

As an emerging class of two-dimensional (2D) materials, MBenes show enormous potential for optoelectronic applications. However, their use in molecular sensing as surface-enhanced Raman scattering (SERS)-active material is unknown. Herein, the first time, we develop a brand-new high-performance MBene SERS platform. Ordered vacancy-triggered highly sensitive platform with outstanding signal uniformity based on 2D Mo4/3B2 was designed. The presented superior activity to most semiconductor substrates, showing remarkable enhancement factor 3.88 × 106 and ultralow detection limit 1 10-9 M. underlying mechanism revealed from systematic experiments density functional theory calculations that ultrahigh sensitivity derived efficient photoinduced charge transfer process between substrates adsorbed molecules. abundant electronic states near Fermi level enables its by 100 000 times higher than bulk MoB. Consequently, could accurately detect various trace chemical analytes. Moreover, ordered metal vacancies MBene, uniform sites are formed, resulting relative standard deviation down 6.0%. This work opens up new horizon which holds great promise field sensing.

Language: Английский

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Curbing pollutant CO2 by using two-dimensional MXenes and MBenes

Chem, Journal Year: 2023, Volume and Issue: 10(2), P. 443 - 483

Published: Oct. 4, 2023

Nearly 85% of current human-caused CO2 emissions result from the burning fossil fuels, including coal, oil, and natural gas. Carbon pollution warms planet increases hazardous extremes, such as heatwaves, droughts, wildfires, heavy rainfall, flooding. Therefore, decarbonization industry power plants is great necessity. To this end, carbon-capture technologies their effectiveness are critical to success curbing environmental CO2. Here, we review two recently developed materials, MXenes MBenes, discuss potential in carbon capture. We present compare material properties, physical, thermodynamic, electrical, chemical, mechanical, electrocatalytic, photocatalytic information, along with cost-effective environmentally friendly synthesis these materials for large-scale applications This comprehensive summary progress field can facilitate research promote collective efforts toward achieving necessary implementation MBenes capturing, sensing, reducing, and/or storing

Language: Английский

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Construction of intelligent moving micro/nanomotors and their applications in biosensing and disease treatment

Theranostics, Journal Year: 2023, Volume and Issue: 13(9), P. 2993 - 3020

Published: Jan. 1, 2023

Micro/nanomotors are containers that pass through liquid media and carry cargo.Because they tiny, micro/nanomotors exhibit excellent potential for biosensing disease treatment applications.However, their size also makes overcoming random Brownian forces very challenging moving on targets.Additionally, to achieve desired practical applications, the expensive materials, short lifetimes, poor biocompatibility, complex preparation methods, side effects of must be addressed, adverse evaluated both in vivo applications.This has led continuous development key materials driving micro/nanomotors.In this work, we review working principles micro/nanomotors.Metallic nonmetallic nanocomplexes, enzymes, living cells explored as micro/nanomotors.We consider exogenous stimulations endogenous substance conditions micro/nanomotor motions.The discussion focuses applications biosensing, treating cancer gynecological diseases, assisted fertilization.By addressing shortcomings, propose directions further developing applying micro/nanomotors.

Language: Английский

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