Combining Freestanding Ferroelectric Perovskite Oxides with Two-Dimensional Semiconductors for High Performance Transistors

Nano Letters, Journal Year: 2022, Volume and Issue: 22(18), P. 7457 - 7466

Published: Sept. 15, 2022

We demonstrate the fabrication of field-effect transistors based on single-layer MoS2 and a thin layer BaTiO3 (BTO) dielectric, isolated from its parent epitaxial template substrate. Thin BTO provides an ultrahigh-κ gate dielectric effectively screening Coulomb scattering centers. These devices show mobilities substantially larger than those obtained with standard SiO2 dielectrics comparable values hexagonal boron nitride, employed for high-performance two-dimensional (2D) devices. Moreover, ferroelectric character induces robust hysteresis current vs voltage characteristics, attributed to polarization switching. This is strongly suppressed when device warmed up above tetragonal-to-cubic transition temperature that leads ferroelectric-to-paraelectric transition. hysteretic behavior attractive applications in memory storage Our results open door integration large family complex oxides exhibiting correlated physics 2D-based

Language: Английский

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Review on two-dimensional material-based field-effect transistor biosensors: accomplishments, mechanisms, and perspectives

Journal of Nanobiotechnology, Journal Year: 2023, Volume and Issue: 21(1)

Published: April 30, 2023

Abstract Field-effect transistor (FET) is regarded as the most promising candidate for next-generation biosensor, benefiting from advantages of label-free, easy operation, low cost, integration, and direct detection biomarkers in liquid environments. With burgeoning advances nanotechnology biotechnology, researchers are trying to improve sensitivity FET biosensors broaden their application scenarios multiple strategies. In order enable understand apply deeply, focusing on multidisciplinary technical details, iteration evolution reviewed exploring sensing mechanism detecting biomolecules (research direction 1), response signal type 2), performance optimization 3), integration strategy 4). Aiming at each research direction, forward perspectives dialectical evaluations summarized enlighten rewarding investigations.

Language: Английский

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2D Materials Beyond Post‐AI Era: Smart Fibers, Soft Robotics, and Single Atom Catalysts

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(11)

Published: Oct. 1, 2023

Recent consecutive discoveries of various 2D materials have triggered significant scientific and technological interests owing to their exceptional material properties, originally stemming from confined geometry. Ever-expanding library can provide ideal solutions critical challenges facing in current trend the fourth industrial revolution. Moreover, chemical modification customize physical/chemical properties satisfy broad spectrum different specific requirements across diverse application areas. This review focuses on three particular emerging areas materials: smart fibers, soft robotics, single atom catalysts (SACs), which hold immense potentials for academic advancements post-artificial intelligence (AI) era. Smart fibers showcase unconventional functionalities including healthcare/environmental monitoring, energy storage/harvesting, antipathogenic protection forms wearable textiles. Soft robotics aligns with future overcome longstanding limitations hard-material based mechanics by introducing actuators sensors. SACs are widely useful storage/conversion environmental management, principally contributing low carbon footprint sustainable post-AI Significance unique values these applications highlighted, where research group has devoted efforts more than a decade.

Language: Английский

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Graphene-black phosphorus printed photodetectors

2D Materials, Journal Year: 2023, Volume and Issue: 10(3), P. 035015 - 035015

Published: March 24, 2023

Abstract Layered materials (LMs) produced by liquid phase exfoliation (LPE) can be used as building blocks for optoelectronic applications. However, when compared with mechanically exfoliated flakes, or films prepared chemical vapor deposition (CVD), LPE-based printed devices are limited mobility, defects and trap states. Here, we present a scalable fabrication technique combining CVD LPE LMs to overcome such limitations. We use black phosphorus inks, inkjet-printed on graphene Si/SiO 2 , patterned inkjet printing based lithography, source drain electrodes an Ag ink, prepare photodetectors (PDs). These have external responsivity ( R ext )∼337 A W −1 at 488 nm, operate from visible (∼488 nm) short-wave infrared (∼2.7 µ m, ext ∼ 48 mA ). also this approach fabricate flexible PDs polyester fabric, one of the most common in textiles, achieving 6 nm operating voltage 1 V. Thus, our combination techniques via is promising wearable

Language: Английский

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Tree-inspired and scalable high thermal conductivity ethylene–vinyl acetate copolymer/expanded graphite/paraffin wax phase change composites for efficient thermal management

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 471, P. 144720 - 144720

Published: July 10, 2023

Language: Английский

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Performance analysis of solution-processed nanosheet strain sensors—a systematic review of graphene and MXene wearable devices

Nanotechnology, Journal Year: 2024, Volume and Issue: 35(20), P. 202001 - 202001

Published: Feb. 7, 2024

Abstract Nanotechnology has led to the realisation of many potential Internet Things devices that can be transformative with regards future healthcare development. However, there is an over saturation wearable sensor review articles essentially quote paper abstracts without critically assessing works. Reported metrics in cases cannot taken at face value, researchers overly fixated on large gauge factors. These facts hurt usefulness such and very nature research area, unintentionally misleading those hoping progress field. Graphene MXenes are arguably most exciting organic inorganic nanomaterials for polymer nanocomposite strain sensing applications respectively. Due their combination cost-efficient, scalable production device performances, commercial usage promising. Here, we explain methods colloidal nanosheets suspension creation mechanisms, models which govern electromechanical properties polymer-based nanocomposites they form. Furthermore, fabrication procedures applied make these nanosheet-based discussed. With performances 70 different systems from recent (post 2020) publications assessed. From evaluation works using universal modelling, prospects field considered. Finally, argue may fact have a negative effect global climate crisis if current trends do not change.

Language: Английский

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Liquid Phase Exfoliation of Few‐Layer Non‐Van der Waals Chromium Sulfide

Advanced Science, Journal Year: 2024, Volume and Issue: 11(31)

Published: June 3, 2024

Abstract Exfoliation of 2D non‐Van der Waals (non‐vdW) semiconductor nanoplates (NPs) from inorganic analogs presents many challenges ahead for further exploring their advanced applications on account the strong bonding energies. In this study, exfoliation ultrathin non‐vdW chromium sulfide (2D Cr 2 S 3 ) by means a combined facile liquid‐phase (LPE) method is successfully demonstrated. The morphology and structure material are systematically examined. Magnetic studies show an obvious temperature‐dependent uncompensated antiferromagnetic behavior . loaded TiO nanorod arrays to form S‐scheme heterojunction. Experimental measurements density functional theory (DFT) calculations confirm that formed @Cr heterojunction facilitates separation transmission photo‐induced electron/hole pairs, resulting in significantly enhanced photocatalytic activity visible region.

Language: Английский

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Scalable Production of 2D Non‐Layered Metal Oxides through Metal–Organic Gel Rapid Redox Transformation

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(42)

Published: July 16, 2024

Abstract Two‐dimensional (2D) nonlayered metal compounds with porous structure show broad application prospects in electrochemistry‐related fields due to their abundant active sites, open ions/electrons diffusion channels, and faradaic reactions. However, scalable universal synthesis of 2D still remains challenging. Here, inspired by blowing gum, a metal‐organic gel (MOG) rapid redox transformation (MRRT) strategy is proposed for the mass production wide variety oxides. Adequate crosslinking degree MOG precursor its NO 3 − are critical generating gas pressure from interior exterior, thus into carbon nanosheets, which further act as self‐sacrifice template formation oxides ultrathin structure. The versatility this demonstrated fabrication 39 oxides, including 10 transition one II‐main group oxide, two III‐main 22 perovskite four high‐entropy As an illustrative verification, exhibit excellent capacitive deionization (CDI) performance. Moreover, assembled CDI cell could desalting battery supply electrical energy during electrode regeneration. This MRRT offers opportunities achieving structures studying applications.

Language: Английский

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Amorphous 2D‐Nanoplatelets of Red Phosphorus Obtained by Liquid‐Phase Exfoliation Yield High Areal Capacity Na‐Ion Battery Anodes

Advanced Energy Materials, Journal Year: 2022, Volume and Issue: 13(6)

Published: Dec. 23, 2022

Abstract The development of sodium ion batteries will require high‐performance electrodes with very large areal capacity and reasonable rate performance. Although red phosphorus is a promising electrode material, it has not yet fulfilled these requirements. Here, liquid phase exfoliation used to convert solid into amorphous, quasi‐2D nanoplatelets. These nanoplatelets have lateral sizes hundreds nanometers, thickness 10s nanometers are quite stable in ambient conditions, displaying only low levels oxidation on the nanosheet surface. By solution mixing carbon nanotubes, can be fabricated nanocomposite battery anodes. After employing an extended activation process, good cycling stability over 1000 cycles low‐rate capacitances >2000 mAh g P −1 achieved. Because high conductivity mechanical robustness provided by nanotube network, possible fabricate thick electrodes. display extremely capacities approaching 10 cm −2 at currents ≈1 mA . Detailed analysis shows limited solid‐state diffusion such that thickest state‐of‐the‐art performance near‐optimized combination

Language: Английский

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Scientific Machine Learning of 2D Perovskite Nanosheet Formation

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(42), P. 23076 - 23087

Published: Oct. 17, 2023

We apply a scientific machine learning (ML) framework to aid the prediction and understanding of nanomaterial formation processes via joint spectral-kinetic model. this study nucleation growth two-dimensional (2D) perovskite nanosheets. Colloidal nanomaterials have size-dependent optical properties can be observed in situ, all which make them good model for complex nucleation, growth, phase transformation 2D perovskites. Our results demonstrate that form through two at nanoscale: either layer-by-layer chemical exfoliation process from lead bromide nanocrystals or direct precursors. utilize phenomenological kinetic analysis discuss circumstances under it is more appropriate use models. Data both techniques are collected situ spectroscopy stopped flow chamber, incorporating over 500,000 spectra taken than 100 different conditions. More broadly, our research shows ability integrate traditional kinetics methods will greatly assist systems.

Language: Английский

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