SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Pingyue Wang,Ancheng Wang,Md Mehedi Hassan,Qin Ouyang,Huanhuan Li,Quansheng Chen
In this study, we have design a new biosensor for E. coli, based on the fluorescence resonance energy transfer (FRET) between aptamer modified upconversion nanoparticles (UCNPs) as donors and layered tungsten disulfide (WS 2 ) nanosheets as the effective acceptor. The aptamer modified-UCNPs can be fetched nearest to the WS 2 surface, because of the potent van der Waals force between the nucleobases of aptamer and the basal plane of WS 2 . The spectral overlap between UCNPs fluorescence emission and WS 2 absorption permits the occurrence of FRET, resulted in quenching of upconversion fluorescence. In the presence of E. coli , the specific aptamer preferentially bind to E. coli , causing changes in the conformation of aptamer, a phenomenon directs the dissociation of mixing probe away from the surface of WS 2 nanosheets and therefore parts of the quenched fluorescence of UCNPs was retrieved. The fluorescence intensity increased with the raised concentration of E. coli . The aptasensor exhibited limitary over the concentration range 85 to 85 × 10 7 cfu mL −1 for E. coli and the detection limit (LOD) was 17 cfu mL −1 . In addition, the proposed biosensing method comprehended huge advantages including the facile operation procedure, high sensitivity and selectivity, which confer a great potential for the quantification of E. coli in medical diagnostics, food and environmental analysis.
研究领域:
生物传感器
·
纳米技术
·
微生物学
·
分析化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 34
·16566-16573
·
IF 9.931
Danke Chen,Wensen Wang,Wen Ying,Yi Guo,Donghui Meng,Youguo Yan,Rongxin Yan,Xinsheng Peng
The modern global climate change and global warming of Earth make it an urgent need to develop emerging CO2 capture and storage techniques. Herein, we first reported the use of WS2 nanosheets to construct laminated membranes for CO2 separation. However, the WS2 membrane showed poor CO2 separation performance with Knudsen selectivities for N2/CO2 (1.28), CH4/CO2 (1.72) and H2/CO2 (4.96). To improve the performance, an ionic liquid (IL) 1-butyl-3-methyl imidazolium tetrafluoroborate ([BMIM][BF4]) with high CO2 solubility and practically no vapour pressure was used for filling the nanochannels of the WS2 membrane. Compared to the bulk IL, the nanoconfined IL exhibits higher freezing temperature, shift of vibration bands and higher interaction energy between CO2 and ILs. Besides, the prepared WS2 laminated membrane with the nanoconfined ionic liquid shows excellent selectivities for CO2/N2 (153.21), CO2/CH4 (68.81) and CO2/H2 (13.56) in single gas measurements as well as good CO2 permeance due to the nanoconfinement of the IL. The simulation results further confirmed and explained the CO2 separation mechanism. It indicates that the nanoconfinement of ILs into the nanochannels of two-dimensional materials is a novel way to achieve CO2-philic membranes to efficiently separate CO2 from other light gases.
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
·
2022
·
IF 5.062
Jiaqian Li,Xiating Qi,Pengkun Ye,Mei Yang,Meng Xie
The combination of chemo-photothermal therapy applied to tumor ablation, overcoming the shortcomings of traditional cancer treatment and has become a research hotspot. Tungsten disulfide nanosheets (WS 2 ) are used as the core, and gold nanoparticles is incorporated into the surface layer of WS 2 (WS 2 /Au) by the sodium citrate reduction method, and then gold-doped tungsten disulfide surface is coated by lipids (WS 2 /Au-lipids). The biocompatibility and stability of this functional nanocomposite has been strongly improved under physiological conditions. The excellent photothermal conversion characteristics of WS 2 /Au-lipid has been verified by the photothermal experiment both in vitro and in vivo. Furthermore, the DOX loaded by WS 2 /Au-lipid has a dual response release curve of pH and NIR. The results of in vitro photothermal and chemotherapy combined treatment shows that the survival rate of the cell of the combined treatment group is obviously lower than the single treatment group. Through the investigation of photothermal performance in vivo, it has been found that after modification, the photothermal performance of the compound has been improved, and the drug can be targeted for delivery to the tumor site, making it more concentrated in cancer cells. In addition, in vivo study confirms that the combined treatment group has a more obvious therapeutic effect on tumors than the single treatment group, and no systemic toxicity was shown. It is an excellent carrier in many aspects and has unlimited development and prospects in the field of multiple cancer treatments.
研究领域:
纳米医学
·
肿瘤学
·
生物材料学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaomin Luo,Liyun Cao,Jianfeng Huang,Jiayin Li,Penghui Guo,Yong Wang,Zhanwei Xu,Koji Kajiyoshi
Growing tungsten disulfide (WS 2 ) on self-supporting carbon fiber cloth is an effective means to enhance the sodium storage. However, it is difficult for WS 2 to exhibit high stability and fast reaction kinetics on the surface of carbon fiber cloth. Herein, we construct a composite structure that WS 2 nanosheets are grown on the surface of carbon fiber cloth with many gaps. These gaps are poured by pyrolytic carbon structure. The composite structures expose lateral (0 0 2) crystal plane of WS 2 nanosheets (WS 2 /CFC@C-P). When WS 2 /CFC@C-P is evaluated as an anode material for sodium-ion batteries (SIBs), the exposed (0 0 2) lateral edge realizes the rapid migration of Na + with fast reaction kinetics. Moreover, the poured carbon stabilizes expanded WS 2 nanosheets to maintain original structure. Under the above merits, WS 2 /CFC@C-P could provide high reversible capacity (672 mAh g −1 after 200 cycles at 100 mA g −1 ) and rate capacity (657 mAh g −1 at 0.1 A g −1 and 230 mAh g −1 at 2 A g −1 ). Furthermore, they deliver 297 mAh g −1 after 500 cycles at 2 A g −1 with a low capacity fading of 0.96% per cycle. This work provides a new insight to develop high performance SIBs by introducing the fine regulation of carbon layer.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF CHEMISTRY
·
2021
·Vol. 40
·期 2
·247-255
·
IF 6
Qian Wang,Huanshun Yin,Yunlei Zhou,Lulu Cao,Zhengkun Yu,Yamin Xu,Shiyun Ai
Comprehensive Summary As a key epigenetic modification, 5-formylcytosine (5fC) controls many important cell functions, such as gene expression and cell differentiation. However, 5fC exists in mammalian tissues and cells with low content, and its structure is highly similar to 5-methylcytosine (5mC), 5-hydroxymethylcytosine (5hmC) and 5-carboxycytosine (5caC), which requires the detection method for detecting 5fC with high sensitivity and specificity. In this experiment, WS 2 /Bi/Bi 2 O 2 CO 3 was used as the photoactive material, 5fC antibody was used as the target molecule recognition reagent, and rolling amplification (RCA) was employed as the signal amplification strategy to construct a novel photoelectrochemical biosensor for detecting 5-formylcytosine deoxynucleotide (5fdCTP). Firstly, WS 2 /Bi/Bi 2 O 2 CO 3 nanocomposite was prepared and characterized, and then modified on the ITO electrode. Then, polyacrylic acid (PAA) was immobilized by electrostatic adsorption, which was employed as the antibody capture reagent based on the covalent reaction of –COOH on PAA with –NH 2 on Ab. Subsequently, 5fdCTP was recognized through immunoreaction, triggering the subsequent rolling circle amplification reaction with the aid of the crosslinker of Zr 4+ . Finally, positive methylene blue (MB) was adsorbed by negative ssDNA, resulting in an increased photoelectric conversion efficiency of WS 2 /Bi/Bi 2 O 2 CO 3 and improved detection sensitivity. The linear range of the PEC biosensor for detecting 5fdCTP was 0.05—100 nmol/L, and the minimum detection concentration was 12.4 pmol/L (S/N = 3). The applicability of this method has been evaluated by studying the influence of Cd 2+ and antibiotic concentration on the 5fC content in the genomic DNA of maize seedlings.
研究领域:
生物化学
·
分子生物学
·
分析化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2023
·Vol. 27
·期 12
·3583-3595
·
IF 2.5
Chen Quangang,He Yi,Yan Siming,Zhou Huilian,Li Hongjie,Li Zhiyuan,Wei Kaijun,Chen Wen,Yan Jing,Wu Guiyang,Yuan Xi
The Ni-P-WS 2 composite coatings with prominent structures were constructed by composite electrodeposition by adding tungsten disulfide (WS 2 ) nanoparticles to the electroplating solution. Modification of the Ni-P-WS 2 composite coating with hexadecyltrimethoxysilane (HDTMS) is going to achieve the superhydrophobic effect. The successful construction of the superhydrophobic surface was demonstrated by X-ray diffractometer (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and contact angle measurement (CA). Electrochemical impedance spectroscopy (EIS) was used to investigate the corrosion resistance. The finding indicates that hexadecyltrimethoxysilane (HDTMS) reduces the surface energy of the Ni-P-WS 2 composite coating, generates a film on its rough surface, blocks the corrosive medium, and improves the corrosion resistance of the composite coating. The Ni-P-WS 2 nanocomposite coating’s water contact angle is 156.8° and its sliding angle is 8° at 3 g/L of WS 2 particle concentration. And the composite plating has the highest self-corrosion potential ( E corr = − 0.285 V) and the lowest self-corrosion current density ( i corr = 3.206 μA cm −2 ), with a better corrosion resistance. In addition, the prepared superhydrophobic coating showed excellent corrosion resistance under the hydrophobic barrier and the layer barrier of WS 2 nanosheets.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Likang Fu,Chenxia Kang,Wenqi Xiong,Pengfu Tian,Shiyue Cao,Shuyun Wan,Hongyi Chen,Chengbao Zhou,Qiming Liu
Devising novel composite electrodes with particular structural/electrochemical characteristics becomes an efficient strategy to advance the performance of rechargeable battery. Herein, considering the homogeneous transition metal sulfide with N-doped carbon derived from zeolitic imidazolate framework-67 (ZIF-67) and WS 2 with large interlayer spacing, a laurel-leaf-like Co 9 S 8 /WS 2 @N-doped carbon bimetallic sulfide (Co 9 S 8 /WS 2 @NC) is engineered and prepared via a step-by-step method. As an electrode material for sodium ion batteries (SIBs), Co 9 S 8 /WS 2 @NC composite delivers high capacities of 480 and 405 mA h g −1 at 0.1 and 1.0 A g −1 , respectively. As the current density increases from 0.1 to 5.0 A g −1 , it provides specific capacity of 359 mA h g −1 with a capacity retention rate of 78.0%, which is higher than that of Co 9 S 8 @NC (63.5%) and WS 2 (58.6%). The Co 9 S 8 /WS 2 @NC composite anode maintains a stable specific capacity (354 mA h g −1 at 2.0 A g −1 ). It also exhibits a high capacitive contribution ratio of 90.8% at 1.0 mV s −1 . This study provides a new and reliable insight for designing bimetallic sulfide with two-dimensional nanostructure for energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Jiaxin Liu,Jia Zheng,Yunshu Lu,Zhongmin Feng,Siqi Zhang,Ting Sun
17β-E 2 is used in animal growth regulation and agricultural fertilizer, and even ng L −1 mass concentration levels can show biological effects. In this work, Ag NPs was used as surface-enhanced Raman spectroscopy (SERS) source and WS 2 was synthesized by a simple method to provide a uniform distribution platform for Ag NPs. The MIP was the shell, which can selectively enrich the target molecule, pull the distance between the target molecule and SERS source, and protect Ag NPs. A cyclable SERS substrate with high sensitivity for detecting 17β-E 2 in food was constructed. The optimized WS 2 /Ag@MIP as SERS substrate has the advantages of high Enhanced Factor (EF = 2.78 × 10 9 ), low detection limit (LOD = 0. 0958 pM), strong anti-interference ability, and good recycling performance. Moreover, the detection of 17β-E 2 in real samples still has good accuracy. This work provides a new possibility for the trace detection of 17β-E 2 in food.
研究领域:
食品安全
·
分析化学
·
纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2023
·
IF 2.8
Bo Zhang,Shuo Ding,Xuanyu Zhang,Lei Qian,Chaoyu Xiang
Due to the deep energy levels, the external quantum efficiency (EQE) of the blue perovskite light-emitting diode (PeLED) is far lower than its green, red, and near-infrared counterparts, which has exceeded 20%. The mismatched energy levels between perovskites and the hole transporting layer (HTL) still hinder the hole injection and consequent improvement of blue PeLED device performance. Here, a two-dimensional material, WS 2 (Tungsten disulfide), was introduced to match the energy levels between perovskites and HTL and enhanced the hole injection. The WS 2 HTL-based perovskite FAPbBr 3-x Cl x blue LED achieved a luminance of 990 cd/m 2 with an EQE of 3.24%, which surpasses the performance of previously reported for the formamidinium (FA) based system, indicating the potential of WS 2 for PeLEDs.
研究领域:
材料科学
·
光电
·
半导体器件
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2014
·
IF 5.825
Yunxia Yuan,Runqing Li,Zhihong Liu
Layered WS2 nanosheet is a kind of two-dimensional (2D) covalent-network solid material with remarkable structural and electronic properties that has attracted increasing interest in recent years. In this work, we propose a one-step sonication-assisted exfoliation method to prepare water-soluble WS2 nanosheet and demonstrate its application as a biosensing platform. The synthesis route is simple and straightforward. We reveal that single-strand DNA (ssDNA) chains can readily be adsorbed on the nanosheet, leading to complete and fast quenching of a fluorescent dye tagged to the DNA chain. The adsorbed ssDNA is detachable from the nanosheet upon the interaction with other biomolecules, resulting in the restoration of the fluorescence. The 2D WS2 nanosheet thus acts as an efficient platform for assembling of bioprobes. Because of the extraordinarily high quenching efficiency, which is the synergic result of both excited-state energy transfer and static quenching, the WS2 platform affords minimal background and high sensitivity. Our attempt will extend the application of this material to biosensing and probing areas.
研究领域:
材料科学
·
纳米技术
·
生物传感器
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2021
·Vol. 46
·期 1
·57-69
·
IF 3.591
Shengming Xu,Jing Xu,Linying Hu,Ye Liu,Lijun Ma
In this paper, NiCo2S4 was coated on the surface of WS2 of a 1T/2H mixed phase by a two-step hydrothermal method to form an in situ core–shell structure. The unique S-scheme heterojunction of the NiCo2S4@WS2 core–shell composite photocatalyst improved the easy recombination of carriers caused by the narrow band gap of NiCo2S4 and WS2, and improved the photocatalytic hydrogen production performance. The loading ratio of NiCo2S4@WS2, the addition of Eosin Y, and the pH value of TEOA were optimized. Under the optimal conditions, the hydrogen production rate reached 5.814 mmol g−1 h−1, which is about 8.55 times and 3.35 times the hydrogen evolution rates of NiCo2S4 and WS2, respectively. The composite catalyst exhibits excellent charge separation efficiency in photoelectrochemistry, PL and BET tests, carrier transport rate and large specific surface area that can provide more active sites, which are the main factors for the improvement of the hydrogen evolution performance. This paper demonstrates new design strategies to drive efficient photocatalytic hydrogen production by building in situ core–shell structures and optimizing the carrier transport paths, which will yield new insights.
研究领域:
材料科学
·
光催化化学
·
能源转化
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Haojie Sui,Benlin He,Junjie Ti,Shouhao Sun,Wenjing Jiao,Haiyan Chen,Yanyan Duan,Peizhi Yang,Qunwei Tang
The promotion of interfacial charge transfer and extraction plays an important role in further improving the power conversion efficiency (PCE) of perovskite solar cells (PSCs). Herein, a composite of WS 2 /AgIn 5 S 8 quantum dots (QDs) with lattice matching and suitable energy level is launched as an efficient hole extractor for carbon-based all-inorganic CsPbBr 3 PSCs. Due to the sulfur vacancy defects passivation of WS 2 QDs by AgIn 5 S 8 QDs and a Type-II band alignment between them, a boosted hole extraction and transfer is realized. In addition, the strong interaction of S of WS 2 /AgIn 5 S 8 QDs and the Pb of perovskite film constructs a convenient pathway of hole transport to promote hole transfer and heals the surface lead ions defects of perovskite film, and the uncoordinated bromine ions defects of CsPbBr 3 film are also passivated by the WS 2 /AgIn 5 S 8 QDs in the form of Ag-Br and In-Br bonds, leading to an inhibition of charge recombination. As a result, the carbon-based all-inorganic CsPbBr 3 PSCs with WS 2 /AgIn 5 S 8 QDs free of encapsulation deliver a maximum PCE of 10.24 % and a remarkably improved stability with over 93 % retention of the initial efficiency after being stored in air with high humidity and temperature (85 % RH, 85 °C) for 720 h.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）