Materials
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2025
·Vol. 18
·期 23
·5360
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IF 3.2
Yanhui Jiao,Xiaoqian Wang,Zisheng Tang,Manrui Liu,Chengqi Liu,Qi Zhang,Yong Liu
Over the past few years, two-dimensional transition metal dichalcogenides (TMDCs) have garnered substantial attention in the field of two-dimensional materials research, owing to their exceptional physicochemical properties. Notably, V-WSe2distinguishes itself by reducing the Schottky barrier at the interface between the material and metal electrodes, thus exhibiting remarkable potential for applications in optoelectronic devices. Our work explores the synthesis of monolayer V-WSe2through halide-assisted atmospheric-pressure chemical vapor deposition (APCVD), with an emphasis on the effects of various halide types on the growth mechanism. In addition, we investigate the impact of vanadium (V) content on the performance of WSe2. Comprehensive optical and structural characterizations of the synthesized material were systematically performed. The findings indicate that incorporating halide salts effectively reduces the volatilization temperature of tungsten trioxide (WO3), thereby markedly enhancing reaction controllability and material crystallinity. Among the tested halide salts, KCl, NaCl, and KI, KI demonstrated the capability to achieve the lowest growth temperature. Varying the V content in the V-WSe2structure significantly influences the optical properties, with higher vanadium concentrations reducing the material’s optical bandgap and Raman frequency. This study highlights the critical role of halides and vanadium content in the material growth process, providing valuable insights for the controlled synthesis of two-dimensional TMDC materials and how varying vanadium concentrations also affect the material’s performance.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Yuhang Han,Jie Yuan,Yuhang Zhu,Qiangqiang Wang,Lin Li,Maosheng Cao
Microwave absorption materials can protect humanity from harmful electromagnetic radiation , but it is still a challenge to absorb electromagnetic radiation with different bands simultaneously. Herein, an effective strategy for obtaining WSe 2 @CNTs nanohybrids is reported. The conductive network and polarization of WSe 2 @CNTs nanohybrids can be tailored by confinedly implanting WSe 2 nanosheets on multi-walled carbon nanotubes. The electromagnetic properties and microwave absorption performance of the nanohybrids are effectively adjusted via changing the hybrid ratio of WSe 2 and CNTs . Multi-band microwave absorption is achieved with up to three bands. The reflection loss (RL) of the sample can reach −60.1 dB, and the bandwidth can reach 4.24 GHz (RL ≤ −10 dB). The excellent microwave absorption performance is attributed to the conductance and multiple relaxations, as well as the synergistic effect of the two. This result confirms that WSe 2 @CNTs nanohybrids are potential candidates for high-efficiency microwave absorbers and provide a valuable pathway for designing high-performance microwave absorption materials in the future.
研究领域:
材料科学
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电磁学
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APPLIED SURFACE SCIENCE
·
2017
·
IF 3.387
Hongchao Li,Jianpeng Zou,Senlin Xie,Xian Leng,Di Gao,Xu Mao
WSe 2 films were prepared on inexpensive graphite substrate through direct-current magnetron sputtering and rapid selenization for catalytic application in the hydrogen evolution reaction (HER). The effects of the temperature and time in selenization process on the HER activity were studied in details. Scanning electron microscopy and Raman spectroscopy indicates that the graphite surface is covered by WSe 2 nanosheets . The HER activity of WSe 2 samples prepared at different conditions has been evaluated via linear sweep voltammetry. Through adjusting selenization parameters, the WSe 2 nanofilms consists of the proper nanosheets has been prepared with the optimal HER activity. It’s important to control the number, the size and crystallinity of WSe 2 nanosheets which take responsibility for the HER activity. WSe 2 electrodes prepared at 500 °C for 10 min exhibit high stability in acidic solution and get the optimal activity with an over potential around −179 mV vs reversible hydrogen electrode (RHE) at the current density of 10 mA cm −2 .
研究领域:
材料科学
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电化学
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纳米材料
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催化化学
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能源材料
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Frontiers of Physics
·
2018
·Vol. 14
·期 1
·1-8
·
IF 1.892
Liu Yue,Zhou Yu,Zhang Hao,Ran Feirong,Zhao Weihao,Wang Lin,Pei Chengjie,Zhang Jindong,Huang Xiao,Li Hai
Interlayer interactions at the heterointerfaces of van der Waals heterostructures (vdWHs), which consist of vertically stacked two-dimensional materials, play important roles in determining their properties. The interlayer interactions are tunable from noncoupling to strong coupling by controlling the twist angle between adjacent layers. However, the influence of stacking sequence and individual component thickness on the properties of vdWHs has rarely been explored. In this work, the influence of the stacking sequence of WSe 2 and graphene in vdWHs of graphene-on-WSe 2 (graphene/WSe 2 ) or WSe 2 -on-graphene (WSe 2 /graphene), as well as their thickness, on their interlayer interaction was systematically investigated by ultralow-frequency (ULF) Raman spectroscopy. A series of ULF breathing modes of WSe 2 nanosheets in these vdWHs were observed with frequencies highly dependent on graphene thickness. Interestingly, the ULF breathing modes of WSe 2 red-shifted in graphene/WSe 2 and WSe 2 /graphene configurations, and the amount of shift in the former was much larger than that in the latter. In contrast, no obvious ULF shift was observed by varying the twist angle between WSe 2 and graphene. This indicates that the interlayer interaction is more sensitive to the stacking sequence compared with the twist angle. The results provide alternative approaches to modulate the interlayer interaction of vdWHs and, thus, tune their optical and optoelectronic properties.
研究领域:
材料科学
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光谱学
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NEW JOURNAL OF CHEMISTRY
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2021
·Vol. 45
·期 23
·10459-10465
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IF 3.591
Chengyi Hong,Lingyan Guan,Lei Huang,Xiaoshan Hong,Zhiyong Huang
A colorimetric method combining WSe2 nanosheets with peroxidase-like activity and xanthine oxidase (XAO) was developed for xanthine detection. XAO catalyzes xanthine oxidation and thereby induces H2O2 production. WSe2 nanosheets can catalyze the oxidization of 3,3′,5,5′-tetramethylbenzidine (TMB) by H2O2 and produce a blue oxidation product of TMB (oxTMB). Under optimal conditions, the colorimetric method showed a linear response for xanthine detection in a range of 0.01–0.5 mM. The limit of detection was 4.37 μM. The recovery rate from spiked serum samples was 95.5%–115.5%. Therefore, our strategy provides new opportunities for the detection of xanthine and evaluation of health care.
研究领域:
生物化学
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医学诊断
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纳米技术
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高影响因子
Small
·
2022
·Vol. 19
·期 2
·2205353
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IF 15.153
Fapeng Sun,Wenting Hong,Xu He,Chuanyong Jian,Qiankun Ju,Qian Cai,Wei Liu
β-Ag 2 Te has attracted considerable attention in the application of electronics and optoelectronics due to its narrow bandgap, high mobility, and topological insulator properties. However, it remains a significant challenge to synthesize 2D Ag 2 Te because of the non-layered structure of Ag 2 Te. Herein, the synthesis of large-size, ultrathin single crystal topological insulator 2D Ag 2 Te via the van der Waals epitaxial method for the first time is reported. The 2D Ag 2 Te crystal exhibits p-type conduction behavior with high carrier mobility of 3336 cm 2 V −1 s −1 at room temperature. Taking advantage of the high mobility and perfect electron structure of Ag 2 Te, the Ag 2 Te/WSe 2 heterojunctions are fabricated via mechanical stacking and show an ultrahigh rectification ratio of 2 × 10 5 . Ag 2 Te/WSe 2 photodetector also exhibits self-driven properties with a fast response speed (40 µs/60 µs) in the near-infrared region. High responsivity (219 mA W −1 ) and light ON/OFF ratio of 6 × 10 5 are obtained under the photovoltaic mode. The overall performance of the Ag 2 Te/WSe 2 photodetector is significantly competitive among all reported 2D photodetectors. These results indicate that 2D Ag 2 Te is a promising candidate for future electronic and optoelectronic applications.
研究领域:
凝聚态物理
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材料科学
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纳米电子学
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光电子学
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半导体器件
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二维材料科学
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高影响因子
JOURNAL OF PHYSICS D-APPLIED PHYSICS
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2024
·Vol. 57
·期 23
·235103
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IF 3.1
Meili Chen,Ruiguang Chang,Xinhui Yang,Chang Lu,Shunhui Zhang,Zhengwei Zhang,Jun He,Xiaoming Yuan
Van der Waals heterostructures formed by inorganic perovskites and transition metal dichalcogenides (TMDCs) have promising applications in photonics and optoelectronics. However, there are few studies on the properties of CsPbBr3/TMDC at low temperatures. Here, we demonstrate van der Waals epitaxy of CsPbBr3 nanowires (NWs), nanoplates (NPs) and nanocones (NCs) on monolayer (ML) WSe2, and investigate the lattice dynamics of the heterostructure at low temperatures using temperature-dependent Raman spectroscopy. In addition, temperature-dependent photoluminescence (PL) spectroscopy shows that the type II band alignment between CsPbBr3 and ML WSe2 leads to a broad emission peak at the low-energy side of the ML WSe2 emission at low temperatures. Meanwhile, a high-energy peak appears near the CsPbBr3 emission below 133 K, which may be related to the phase transition of CsPbBr3 from the cubic to the orthorhombic phase. These findings are important for the development of van der Waals heterostructure based self-powered photodetector with high performance.
研究领域:
材料科学
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光学
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凝聚态物理
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INORGANIC CHEMISTRY COMMUNICATIONS
·
2025
·
IF 5.4
Sohail Mumtaz,Muhammad Imran,Amir Muhammad Afzal
In this study, we develop photoresponsive heterogeneous Cobalt-nickel-based MOFs (CoNi-MOFs), cobalt dioxide (CoO 2 ), and tungsten diselenide (WSe 2 ) hybrid device to improve the performance of photo-assisted supercapacitors. We measure the electrochemical characteristics of photo-assisted hybrid electrodes under both dark and light conditions using cyclic voltammetry and galvanostatic charge–discharge. In dark, a high specific capacity (Qs) is estimated at 970 C/g, increased to 1230 C/g under the light in three-electrode assemblies. An FTO/CoNi-MOF@CoO 2 @WSe 2 /Electrolytes//PANI@AC/GS photo hybrid supercapacitors device is designed and measured in both conditions. The hybrid device showed Qs of 325 C/g in light conditions with energy and power densities of 72 Wh/kg and 827 W/kg, respectively. Even after undergoing 6000 cycles, it exhibited a capacity retention (CR) rate of 91 % and columbic efficiency of 93 %, indicating its exceptional durability as an energy storage device. Besides, the composite devices detect zearalenone in agricultural food samples. The optimal signal for Zearalenone in phosphate buffer solution was observed at pH 7.0, yielding the highest detected response. The sensor demonstrated a broad linear dynamic range of 1–300 μM and an impressively low detection limit of 0.5 nM for Zearalenone concentration. The CoNi-MOF@CoO 2 @WSe 2 nanocomposite has a remarkable sensitivity value of 110.72 mA/cm −2 /mM −1 and response against zearalenone in light. The findings also suggest that the capacitance of the CoNi-MOF@CoO 2 @WSe 2 electrode may increase at an optimal temperature. This likely occurs due to enhanced ion diffusion and charge transfer kinetics, which can improve the energy storage device’s efficiency and aid in identifying the cancerous part of the body.
研究领域:
材料科学
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分析化学
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能源存储
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食品安全检测
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Physica Status Solidi-Rapid Research Letters
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2025
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IF 2
Yuedong Wang,Jindong Bai,Zhiyi Liu,Xiao Guo,Fangyan Ang,Yuli Huang,Haipeng Xie,Han Huang
Transition metal oxide alloys, with tunable stoichiometric ratio, have garnered significant attention due to their unique electronic structure and diverse chemical properties. However, synthesis of micron-scale, single-crystalline transition metal oxide alloys remains a challenge due to their unique alloy structure and stringent synthesis conditions. Herein, a WSe 2 -assisted chemical vapor deposition method is reported for synthesizing W x Mo 1- x O 2 nanocrystals with various dimensions: nanorods, nanoplates, and nanodots. The microscopic (optical microscope, atomic force microscope, and scanning electron microscope) images reveal that the nanocrystals have well-defined non-layered polyhedral structures. The elemental composition is confirmed by Raman spectroscopy and energy dispersion spectroscopy. The change in phonon symmetry in nanorods and the blue shift of Raman peaks in nanocrystals demonstrate the significant role of the quantum confinement effect. The spatial distribution of the various dimensional nanocrystals provides insights into the possible growth mechanism and the key role of the WSe 2 in growth. The WSe 2 -assisted growth strategy for alloyed nanocrystals can expand the transition metal oxide alloy material library and offer a platform for exploring additional properties of transition metal oxide alloys.
研究领域:
材料科学
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纳米技术
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物理化学
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高影响因子
Materials
·
2024
·Vol. 17
·期 10
·2190
·
IF 3.1
Xuemin Luo,Yanhui Jiao,Hang Li,Qi Liu,Jinfeng Liu,Mingwei Wang,Yong Liu
Transition metal dichalcogenides (TMDs), particularly monolayer TMDs with direct bandgap properties, are key to advancing optoelectronic device technology. WSe2stands out due to its adjustable carrier transport, making it a prime candidate for optoelectronic applications. This study explores monolayer WSe2synthesis via H2-assisted CVD, focusing on how carrier gas flow rate affects WSe2quality. A comprehensive characterization of monolayer WSe2was conducted using OM (optical microscope), Raman spectroscopy, PL spectroscopy, AFM, SEM, XPS, HRTEM, and XRD. It was found that H2incorporation and flow rate critically influence WSe2’s growth and structural integrity, with low flow rates favoring precursor concentration for product formation and high rates causing disintegration of existing structures. This research accentuates the significance of fine-tuning the carrier gas flow rate for optimizing monolayer WSe2synthesis, offering insights for fabricating monolayer TMDs like WS2, MoSe2, and MoS2, and facilitating their broader integration into optoelectronic devices.
研究领域:
材料科学
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化学工程
·
光学工程
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ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Hong Li,Zhijian Peng,Jingwen Qian,Meng Wang,Chengbiao Wang,Xiuli Fu
Recently, WSe2 as a typical transition metal dichalcogenide compound has attracted extensive attention due to its potential applications in electronic and optoelectronic devices. However, WSe2 alone cannot be directly used as a photocatalyst due to its inferior performance possibly caused by the strong recombination of photogenerated electron–hole pairs. Here a novel C fibers@WSe2 nanoplates core–shell composite (NPCSC) was successfully synthesized via facile, one-step thermal evaporation, in which numerous WSe2 thin nanoplates were in situ, densely and even vertically grown on the surface of the C fibers. Such composite presents highly solar-driven photocatalytic activity and stability for the degradation of various organic aqueous dyes including methylene blue and rhodamine B, and highly harmful gases like toluene, showing the great potential for environmental remediation by degrading toxic industrial chemicals using sunlight. Under simulated sunlight irradiation, comparing with commercially available WSe2 powder, the as-synthesized C fibers@WSe2 NPCSC presents significantly enhanced reaction rate constants by a factor of approximately 15, 9, and 3 for the degradation of aqueous methylene blue, aqueous rhodamine B, and gaseous toluene, respectively, due to the effective separation of photogenerated electron–hole pairs promoted by the rapid transfer of photogenerated electrons through C fibers. Moreover, this one-step thermal evaporation is an easy-handling, environmentally friendly, and low-cost synthesis method, which is suitable for large-scale production.
研究领域:
材料科学
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环境科学
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化学工程
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高影响因子
ACS Sensors
·
2025
·
IF 9.1
Zhenliang Li,Yuan Ren,Yujian Rao,Rui Ma,Ao Xu,Zejun Han,Tuo Zhang,Xueqiong Cui,Qiongfeng Shi,Li Tao
A rapid and highly sensitive detection of harmful gas molecules is crucial in artificial olfaction (electronic nose), which plays a significant role in areas such as environmental monitoring and healthcare. However, it remains a significant challenge to construct highly sensitive molecular sensors with fast response at room temperature due to the limitations in structures and properties (e.g., porosity, crystallinity, and carrier mobility) of the sensing materials. Herein, this study proposes a facile method to enable highly crystalline mesoporous WSe2/WO3 (m-WSe2/WO3) semiconductor heterostructures through controllable interfacial self-assembly of polyoxometalate (POM) clusters and amphiphilic block copolymers combined with a thermal-assisted conversion process. It allows uniform pore size, open channels, large specific surface area, highly crystalline framework, and abundant transition metal chalcogenide/metal oxide heterojunction interfaces. The m-WSe2/WO3-based chemiresistive semiconductor sensor achieves efficient detection of NO2 at room temperature, including ultrafast response (5 s), high selectivity (SNO2/Sgas > 5), high sensitivity (62.5%@50 ppm), low detection limit (50 ppb), and long-term stability (>30 days). Thanks to the synergistic improvement of sensing dynamics between mesostructure and heterojunction, such a few-second response time has been reduced by half of the reported values in most existing counterparts based on two-dimensional materials. Our work paves the way for the application of high-performance and cost-effective molecular sensors in artificial olfaction, electronic skins, and wearable integrated circuits at room temperature.
研究领域:
材料科学
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电子工程
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环境科学
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高影响因子
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