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Porous GO/2D heterostructure assembly. a) Schematic illustration of FHGO membrane assembly at air–water interface and b) stable RT sensing platform via 2D heterostructure. SEM images of c) pure BP, d) FHGO_BP, e) pure MXene, and f) FHGO_Mxene. TEM cross‐section images of g) FHGO_BP and i) FHGO_Mxene. EDS elemental mapping images of h) FHGO_BP and j) FHGO_Mxene.
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2D black phosphorous (BP) and MXenes have triggered enormous research interest in catalysis, energy storage, and chemical sensing. Unfortunately, the low stability of these materials under practical operating conditions remains a critical bottleneck, particularly as they are prone to oxidization under moisture. In this work, the design and applicat...
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Citations
... The second involves introducing robust 2D materials such as hBN and GO to render the surface of sensitive 2D materials inert to environmental influences [120]. For example, few-layer holey GO membranes were utilized as passivation layers to protect BP and MXene from oxidative degradation [121]. It should also be noted that the incorporation of polymer or other 2D materials might decrease thermal dissipation in layered 2D films, which should be considered for devices operating at high light intensities and with temperature-sensitive 2D materials. ...
... The second involves introducing robust 2D materials such as hBN and GO to render the surface of sensitive 2D materials inert to environmental influences [120]. For example, few-layer holey GO membranes were utilized as passivation layers to protect BP and MXene from oxidative degradation [121]. It should also be noted that the incorporation of polymer or other 2D materials might decrease thermal dissipation in layered 2D films, which should be considered for devices operating at high light intensities and with temperature-sensitive 2D materials. ...
Optical polarizers are essential components for the selection and manipulation of light polarization states in optical systems. Over the past decade, the rapid advancement of photonic technologies and devices has led to the development of a range of novel optical polarizers, opening avenues for many breakthroughs and expanding applications across diverse fields. Particularly, two-dimensional (2D) materials, known for their atomic thin film structures and unique optical properties, have become attractive for implementing optical polarizers with high performance and new features that were not achievable before. This paper reviews recent progress in 2D-material-based optical polarizers. First, an overview of key properties of various 2D materials for realizing optical polarizers is provided. Next, the state-of-the-art optical polarizers based on 2D materials, which are categorized into spatial-light devices, fiber devices, and integrated waveguide devices, are reviewed and compared. Finally, we discuss the current challenges of this field as well as the exciting opportunities for future technological advances.
... The second involves introducing robust 2D materials such as hBN and GO to render the surface of sensitive 2D materials inert to environmental influences [120]. For example, few-layer holey GO membranes were utilized as passivation layers to protect BP and MXene from oxidative degradation [121]. It should also be noted that the incorporation of polymer or other 2D materials might decrease thermal dissipation in layered 2D films, which should be considered for devices operating at high light intensities and with temperature-sensitive 2D materials. ...
Optical polarizers are essential components for the selection and manipulation of light polarization states in optical systems. Over the past decade, the rapid advancement of photonic technologies and devices has led to the development of a range of novel optical polarizers, opening avenues for many breakthroughs and expanding applications across diverse fields. Particularly, two-dimensional (2D) materials, known for their atomic thin film structures and unique optical properties, have become attractive for implementing optical polarizers with high performance and new features that were not achievable before. This paper reviews recent progress in 2D-material-based optical polarizers. First, an overview of key properties of various 2D materials for realizing optical polarizers is provided. Next, the state-of-the-art optical polarizers based on 2D materials, which are categorized into spatial-light devices, fiber devices, and integrated waveguide devices, are reviewed and compared. Finally, we discuss the current challenges of this field as well as the exciting opportunities for future technological advances.
... The second involves introducing robust 2D materials such as hBN and GO to render the surface of sensitive 2D materials inert to environmental influences [120]. For example, fewlayer holey GO membranes were utilized as passivation layers to protect BP and MXene from oxidative degradation [121]. It should also be noted that the incorporation of polymer or other 2D materials might decrease thermal dissipation in layered 2D films, which should be considered for devices operating at high light intensities and with temperature-sensitive 2D materials. ...
Optical polarizers are essential components for the selection and manipulation of light polarization states in optical systems. Over the past decade, the rapid advancement of photonic technologies and devices has led to the development of a range of novel optical polarizers, opening avenues for many breakthroughs and expanding applications across diverse fields. Particularly, two-dimensional (2D) materials, known for their atomic thin film structures and unique optical properties, have become attractive for implementing optical polarizers with high performance and new features that were not achievable before. This paper reviews recent progress in 2D-material-based optical polarizers. First, an overview of key properties of various 2D materials for realizing optical polarizers is provided. Next, the state-of-the-art optical polarizers based on 2D materials, which are categorized into spatial-light devices, fiber devices, and integrated waveguide devices, are reviewed and compared. Finally, we discuss the current challenges of this field as well as the exciting opportunities for future technological advances.
... Compared to chemo-capacitive sensors, chemo-resistive sensors offer the advantages of simpler structure and lower cost [31]. Moreover, chemoresistive-based sensors can respond swiftly to changes in ethylene concentration and exhibit extended longevity, which can deliver a stable and reliable detection [32][33][34][35][36][37][38][39]. Thus, MOS-based chemo-resistive sensors have great potential for simple, rapid, and in-field detection of ethylene. ...
Ethylene, an important phytohormone, significantly influences plant growth and the ripeness of fruits and vegetables. During the transportation and storage of agricultural products, excessive ethylene can lead to economic losses due to rapid deterioration. Metal oxide semiconductor (MOS)-based chemo-resistive sensors are a promising technology for the detection of ethylene due to their low cost, high sensitivity, portability, etc. This review comprehensively summarizes the materials, fabrications, agricultural applications, and sensing mechanisms of these sensors. Moreover, the current challenges are highlighted and the potential solutions are proposed.
... The incorporation of hydrophilic MXene could enhance hGO's hydrophilicity. Moreover, decorating Ti 3 C 2 Tx MXene with a few-layer holey graphene oxide membrane has prevented oxidative degradation and self-restacking [32]. ...
... Bare MXene has been fabricated as an electrochemical sensor detecting various analytes such as hydrogen peroxide [31], bromate [32], glucose [33], dopamine [34], copper ion [35] and ferric ion [36]. MXene also can be incorporated with other 2D materials such as graphene [27,28,[37][38][39][40][41][42][43][44], transition metal dichalcogenides (TMD) [45,46], black phosphorus (BP) [47], layered double hydroxide (LDH) [48] and metal-organic framework (MOF) [49][50][51] to form 2D MXene heterostructure for electrochemical sensor fabrication. Table 1 lists the electrochemical performance of the pristine MXene and 2D MXene heterostructure with their corresponding analyte detection. ...
The increasing environmental pollution and recurrent viral outbreaks have piqued researchers’ interest in experimenting with new materials to improve electrochemical sensing properties and develop rapid, sensitive, low-cost, environmentally friendly, real-time detection devices that could generate data beneficial for health and environmental monitoring. Due to their wide range of applications, transition metal carbides and nitrides (MXene) have recently gained prominence in two-dimensional (2D) nanomaterials. MXene is a promising material for developing next-generation sensing applications due to its outstanding electronic and surface properties. Despite its numerous positive attributes, MXene exhibits a high proclivity for intersheet aggregation, lowering its electrochemical performance. To address this persistent issue, researchers attempted to integrate MXene with other 2D nanomaterials, nanoparticles, enzymes, or 3D materials, forming a composite with synergistic effects for enhancing sensing performance. Although plenty of literature is available in the sensor field, there is still a dearth of research on the two-dimensional MXene heterostructure, notably in electrochemical sensing applications. Thus, the main aim of this review is to elaborate on the 2D MXene heterostructure in the electrochemical sensing field. This review summarises different 2D MXene synthesis techniques, MXene characteristics, and sensing performance to provide a framework for developing high-performance sensors.
... Various types of gas sensors have been studied according to their operating principles, namely optical gas sensor [9,10], cantilever gas sensor [11], and solid-state electrochemical gas sensor [12][13][14]. Among them, chemoresistive gas sensors have been suggested as suitable for simple structure, facile synthesis process, and low cost [15][16][17][18]. In addition, strong physical resistance and easy miniaturization, which are essential properties for food quality monitoring, are accelerating research. ...
... Graphene oxide (GO) is considered as a suitable platform for constructing vdWH due to its facile preparation and huge specific surface area (the theoretical value of 2,629 m 2 g − 1 ) [10,11]. Moreover, oxygen doping affords graphene a semiconductor property via downshifting the valence band (VB) and opening the bandgap [12]. ...
The application of graphene oxide (GO) in the photoelectronic materials are greatly restricted by the ineffective carrier separation and mobility, as well as the poor utilization of visible light. In this study, a strategy is proposed to overcome these disadvantages via the fabrication of van der Waals heterostructure. The goal heterostructure, Pc-GO, is prepared by the simple assembly of α-phase phthalocyanine (α-H2Pc) and GO in water. The energy degeneration is observed between π orbital of α-H2Pc and valence band of GO, which acts as the channel for transferring the photogenerated electrons from H2Pc to GO. Interestingly, electron transfer becomes more remarkable with the decreasing H2Pc layers. The Fermi level of the heterostructure is thus engineered. Fast mobility of carriers is also demonstrated by the spectroscopic technologies and electrochemical methods. Based on these advantages, the effective photocatalytic detoxication of As(III) is realized on Pc-GO without any electrons/holes sacrifices or additional degassing, and the average reaction rate is 0.68 mg g⁻¹ h⁻¹. Especially, Pc-GO suggests an excellent photocatalytic activity in the range of visible light, and 53.1% of the activity is maintained in contrast to that under the full spectrum. Pc-GO even remains 22 % of photocatalytic property after wrapped by a A4 printing paper, which is essential for the practical application of Pc-GO in natural muddy water. Moreover, the visible-light catalysis of Pc-GO is demonstrated to correlate with the unique α-H2Pc stacks. This work extends the preparation strategies of As(III) remediation materials, and promises a possible method to engineer the photoelectric properties of the device via changing the arrangement of two-dimensional semiconductor.
