Grain-boundary-rich polycrystalline monolayer WS2 film for attomolar-level Hg2+ sensors

Liu, Lixuan; Ye, Kun; Lin, Changqing; Jia, Zhiyan; Xue, Tao; Nie, Anmin; Cheng, Yingchun; Xiang, Jianyong; Mu, Congpu; Wang, Bochong; Zhai, Kun; Zhao, Zhisheng; Gong, Yongji; Liu, Zhongyuan; Tian, Yongjun

doi:10.1038/s41467-021-24254-x

Cited by 53 publications

(30 citation statements)

References 52 publications

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“…TMD monolayers with direct band gaps exhibit strong photoluminescence (PL) emission in the visible and nearinfrared ranges and are widely used in optoelectronic devices such as light emitters and photodetectors. Kim et al 35 observed strong PL emission from the edges and GBs of WS 2 monolayers (Figure 9a) that is associated with trion and biexciton formation. The PL strength shows different degrees of attenuation in different areas.…”

Section: Optical Propertiesmentioning

confidence: 99%

“…The device showed gate-tunable heterosynaptic functionality with a wide tunability of individual states and switching ratios, effectively functioning like neurons in the brain. In addition, it also shows potential in other functional electronic devices, including sensors and photonic moderators . For example, Liu et al developed a high-GB-density WS 2 film for ultrasensitive Hg 2+ sensors.…”

Section: Properties Of Gbsmentioning

confidence: 99%

Section: Properties Of Gbsmentioning

confidence: 99%

“…In addition, it also shows potential in other functional electronic devices, including sensors 34 and photonic moderators. 35 For example, Liu et al 34 developed a high-GB-density WS 2 film for ultrasensitive Hg 2+ sensors. The GBs behave like Hg 2+ traps to efficiently absorb Hg 2+ via the covalent bonding mode.…”

Section: Electrical Propertiesmentioning

confidence: 99%

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Functional Grain Boundaries in Two-Dimensional Transition-Metal Dichalcogenides

et al. 2021

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Metrics & MoreArticle Recommendations CONSPECTUS: Two-dimensional (2D) transition-metal dichalcogenides (TMDs) are a class of promising low-dimensional materials with a variety of emergent properties which are attractive for next-generation electronic and optical devices; such properties include tunable band gaps, high electron mobilities, high exciton binding energies, excellent thermal stability and flexibility. During the synthesis process of these materials, especially chemical vapor deposition, defects such as grain boundaries (GBs) inevitably exist. GBs are the interfaces between differently oriented grains and are line defects in 2D crystals.While GBs can degrade the overall quality of 2D materials and adversely affect some of their electrical and mechanical properties, recent results show that GBs give rise to or enhance a wide range of unique electrical, mechanical, and chemical properties of the GBs in 2D TMDs. The effects of GBs on 2D material properties are complex and diverse, providing exciting opportunities to realize new functionalities by manipulating the local structure and properties. Notably, these effects are strongly related to atom types, dislocation cores, crystal misorientation at GBs, and both in-and out-of-plane deformation. The exploitation of GBs for novel applications requires a deepened understanding of synthesis, postprocessing, defect structures, GB properties, and GB structure− property relationships in 2D materials.In this Account, we first introduce a detailed classification of GBs in 2D TMDs based on atomic structure, symmetry, and the local coordination of both transition metals and chalcogenide atoms. The GB types in typical MoS 2 (high-symmetry hexagonal structure) and ReS 2 (low-symmetry monoclinic structure) are taken as examples. Next, we describe the properties of GBs in 2D TMDs, including thermodynamic and kinetic, mechanical, thermal, electrical, magnetic, chemical, and electrocatalysis properties as well as several application areas where these may be exploited. Here we provide systematic atomic-level and electronic level explanations of these properties to clarify their dependences on GB structures. Applications that extend from these properties, including functional electronics, chemical sensors, and electrocatalysts, are also described. Finally, we provide several perspectives and suggest promising opportunities for exploiting the novel properties of GBs in 2D TMDs. We expect that this Account will further stimulate the fundamental research of GBs and boost the wide application of multifunctional devices.

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Section: Optical Propertiesmentioning

confidence: 99%

Section: Properties Of Gbsmentioning

confidence: 99%

Section: Properties Of Gbsmentioning

confidence: 99%

Section: Electrical Propertiesmentioning

confidence: 99%

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Functional Grain Boundaries in Two-Dimensional Transition-Metal Dichalcogenides

et al. 2021

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“…The detection strategy part could be overcome by using new nanomaterials as the substrate material to improve the primary signal [ 121 ]. The second antibody could be used to amplify the signal of the biosensor.…”

Section: Summary and Prospectmentioning

confidence: 99%

A Review of Biosensors for Detecting Tumor Markers in Breast Cancer

Hong

Sun

et al. 2022

Life

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Breast cancer has the highest cancer incidence rate in women. Early screening of breast cancer can effectively improve the treatment effect of patients. However, the main diagnostic techniques available for the detection of breast cancer require the corresponding equipment, professional practitioners, and expert analysis, and the detection cost is high. Tumor markers are a kind of active substance that can indicate the existence and growth of the tumor. The detection of tumor markers can effectively assist the diagnosis and treatment of breast cancer. The conventional detection methods of tumor markers have some shortcomings, such as insufficient sensitivity, expensive equipment, and complicated operations. Compared with these methods, biosensors have the advantages of high sensitivity, simple operation, low equipment cost, and can quantitatively detect all kinds of tumor markers. This review summarizes the biosensors (2013–2021) for the detection of breast cancer biomarkers. Firstly, the various reported tumor markers of breast cancer are introduced. Then, the development of biosensors designed for the sensitive, stable, and selective recognition of breast cancer biomarkers was systematically discussed, with special attention to the main clinical biomarkers, such as human epidermal growth factor receptor-2 (HER2) and estrogen receptor (ER). Finally, the opportunities and challenges of developing efficient biosensors in breast cancer diagnosis and treatment are discussed.

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All‐In‐One Detection, Removal and Recovery of Hg²⁺ in Industrial Wastewater with Plasmonic Schottky Heterostructures

Wang,

Liu,

Liu

et al. 2023

Adv Funct Materials

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The effective governance of Hg2+ in environmental wastewater is of profound significance to deal with the global pollution issues. However, the present methodologies usually only focused on a single function of either detection or removal, which encounters severe secondary pollution and cumbersome operation cost, while the integration of Hg2+ detection, removal, and recovery in one process is barely realized. In this study, an All‐In‐One photoelectrochemical system is built combining the detection, removal, and recovery of Hg2+ pollutant in a single process, by ingeniously developing a fundamental principle, namely alloying‐induced plasmonic quenching mechanism in Schottky heterostructures. Briefly, the high‐efficiency removal and recovery of Hg2+ in wastewater is realized via the favorable alloying of Hg in Ag nanoparticles that well‐dispersed on the free‐standing WO3 nanoplate networks. The formation of Ag–Hg alloy future leads to a remarkable plasmonic quenching effect of the Ag nanoparticles, which is used to modulate the photoelectrochemical singles to realize the high‐precision detection. Through this ingenious design, an ultralow Hg2+ detection limit of 0.296 nm is achieved with a broad detection range up to 12.5 µm, and meanwhile realize a removal/recovery rate of 100% in single Hg2+ solution and 97 ± 2% in industrial wastewater with multiple contamination ions. The detection and removal/recovery performance parameters reported in the study are much better as compared to the recently reported single function detection or removal/recovery systems. This work opens a fresh avenue in tackling the problem of heavy metal pollution using plasmonic Schottky heterostructure based All‐In‐One systems.

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Grain-boundary-rich polycrystalline monolayer WS2 film for attomolar-level Hg2+ sensors

Cited by 53 publications

References 52 publications

Functional Grain Boundaries in Two-Dimensional Transition-Metal Dichalcogenides

Functional Grain Boundaries in Two-Dimensional Transition-Metal Dichalcogenides

A Review of Biosensors for Detecting Tumor Markers in Breast Cancer

All‐In‐One Detection, Removal and Recovery of Hg²⁺ in Industrial Wastewater with Plasmonic Schottky Heterostructures

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Grain-boundary-rich polycrystalline monolayer WS2 film for attomolar-level Hg2+ sensors

Cited by 53 publications

References 52 publications

Functional Grain Boundaries in Two-Dimensional Transition-Metal Dichalcogenides

Functional Grain Boundaries in Two-Dimensional Transition-Metal Dichalcogenides

A Review of Biosensors for Detecting Tumor Markers in Breast Cancer

All‐In‐One Detection, Removal and Recovery of Hg2+ in Industrial Wastewater with Plasmonic Schottky Heterostructures

Contact Info

Product

Resources

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All‐In‐One Detection, Removal and Recovery of Hg²⁺ in Industrial Wastewater with Plasmonic Schottky Heterostructures