JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2019
·Vol. 166
·期 2
·B147
·
IF 3.12
Kaixin Ma,Ankita Sinha,Xueming Dang,Huimin Zhao
A sensitive electrochemical sensor was fabricated based on two dimensional (2D) MoS2 nanosheets (MoS2), gold nanoparticles (AuNPs) and polypyrrole (PPY) nanocomposite modified glass carbon electrode (GCE) for glucose detection. Liquid phase exfoliation (LPE) method was applied for the synthesis of 2D MoS2 nanosheets using N, N-dimethylformamide (DMF). The fabrication of sensor involved the electrochemical deposition of AuNPs on GCE using cyclic voltammetry (CV) followed by drop-casting of 2D MoS2 nanosheets to prepare MoS2-AuNPs/GCE electrode. Pyrrole was then electropolymerized on MoS2-AuNPs/GCE surface using amperometry. The structural properties of prepared nancomposites were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and fourier transform infra red (FTIR) spectroscopic techniques. The prepared MoS2-PPY-AuNPs/GCE electrode was applied for electrochemical sensing of glucose by differential pulse voltammetry (DPV) in NaOH solution. Cu(II)/Cu(III) redox couple was utilized as catalytic center which converted glucose into gluconolactone at an oxidation potential of +0.45 V. The fabricated electrode showed a detection limit (LOD) of 0.08 nM and a quantification limit (LOQ) of 0.26 nM. Furthermore, it exhibited high reproducibility (2.48%), long term stability and high selectivity toward glucose detection. The electrode was found suitable for glucose detection in human serum samples with recoveries ranging from 97%–102.1%.
研究领域:
材料科学
·
分析化学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2019
·
IF 7.466
Raheela Naz,Muhammad Imtiaz,Qinglei Liu,Lulu Yao,Waseem Abbas,Tengfei Li,Imran Zada,Yang Yuan,Wenshu Chen,Jiajun Gu
Highly defective molybdenum disulfide (MoS 2 ) nanosheets of 1T phase are synthesized on a three-dimensional reduced graphene oxide (3D RGO) network through a one-pot hydrothermal method . By switching the reaction time, the resulting MoS 2 's phases (1T or 2H) and defect-density are successfully controlled. Reducing the reaction time from 20 to 6 h increases the defect-density and induces a phase transition from hybrid 2H/1T to 1T phase. High defect-density coupled with high 1T-phase portion in MoS 2 nanosheets/RGO heterostructures enhances the electrochemical performance for supercapacitor application by inducing additional active sites, which provide fast charge transfer rate and a large number of ion diffusion channels. Among all samples, the defect rich 1T-phase MoS 2 nanosheets/RGO heterostructure synthesized in 6 h (M/RGO-6) gives an outstanding specific capacitance of 442.0 F g −1 at a current density of 1 A g −1 . The M/RGO-6 also exhibits excellent cycling stability with capacitance retention of 90.3% over 1000 cycles at 5 A g −1 . These make M/RGO-6 attractive to the electrode of high-performance supercapacitors .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2016
·
IF 3.897
Xiaming Feng,Weiyi Xing,Jiajia Liu,Shuilai Qiu,Yuan Hu,Kim Meow Liew
Molybdenum disulfide (MoS 2 ) nanosheets were non-covalently organo-modified by electrostatically interacting with cetylpyridinium chloride (CPC) and then were used to reinforce the properties of polyurethane acrylate (PUA) resin for the first time. Benefited from the alkyl chain of CPC, the modified MoS 2 nanosheets can be well dispersed in PUA matrix. Notably, inclusion of 0.5 wt% CPC-MoS 2 leads to a 11.7 °C increase in the temperature corresponding to 50 wt % weight loss, indicating the enhanced thermal stability of PUA nanocomposites . Moreover, the improvement in tensile strength , work of fracture and storage modulus (at −75 °C) of PUA/f-MoS 2 nanocomposites can reach up to 37.4%, 41.9% and 102.0% respectively. This substantial nano-reinforcement is mainly attributed to the proper organic modification and inherent feature of MoS 2 nanosheets. The strong interfacial adhesion within PUA/f-MoS 2 nanocomposites can efficiently transfer the load from weak polymer chains to robust MoS 2 nanosheets.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 32
·期 13
·2109882
·
IF 18.808
Jie Zhang,Boyou Zhang,Zefeng Zheng,Qingyun Cai,Jingcheng Wang,Qiang Shu,Lijia Wang
Tissue-engineered bones have therapeutic potential for critical-size bone defects; however, the production of high quantities of the tissue-engineered bones with osteo-induction ability remains a huge challenge. Hyperthermia has been shown to up-regulate the expression of osteogenesis-related proteins to efficiently to promote bone regeneration. In this study, the authors develop a novel photothermal tissueengineered bone (PTEB) with osteo-induction ability and a biomimetic cellular environment. PTEB is generated by seeding rat bone mesenchymal stem cells (rBMMSCs) in the photothermal MoS 2 -biotin-garose-gelatin scaffold, and then overlaying the scaffold using osteo-induction extracellular matrix (OiECM). The rBMMSCs act as seeding cells, while OiECM provide a biomimetic microenvironment for repairing critical-sized cranial defects in rats. The results show that the PTEB exhibit high biocompatibility and osteo-induction ability under near-infrared (NIR) radiation. Results of in vitro experiments show that PTEB under NIR radiation promote proliferation and osteogenic differentiation of rBMMSCs. Furthermore, the PTEB implantation under NIR radiation significantly induces regeneration of bone in critical-size bone defects in rats 12 weeks after implantation. These findings indicate that PTEB has great potential in regenerative medicine and may represent an effective replacement for autografts used commonly in bone tissue engineering.
研究领域:
生物医学工程
·
再生医学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Luping Feng,Lixiang Zhang,Sheng Zhang,Xi Chen,Pan Li,Yuan Gao,Shujing Xie,Anchao Zhang,Hua Wang
Heteroatom doping is one of the effective ways to improve the catalytic performances of nanozymes. In the present work, the plasma-assisted controllable doping of nitrogen (N) into MoS2 nanosheets has been initially proposed, resulting in efficient nanozymes. The so-obtained nanozymes were characterized separately by TEM, XRD, XPS, and FTIR. It was discovered that the resulting N-doped MoS2 nanosheets could present dramatically enhanced peroxidase-like catalytic activities depending on the plasma treatment time. Particularly, that with the 2-min treatment could display the highest catalytic activity, which is over 3-fold higher than that of pristine MoS2, that was also demonstrated by the kinetics studies. Herein, the N2 plasma treatment could facilitate the N elements to be doped covalently into MoS2 nanosheets to achieve the increased surface wettability and affinity of nanozymes for the improved access of the electrons and substrates of catalytic reactions. More importantly, the covalent doping of N elements into MoS2 nanosheets with a lower Fermi level, as evidenced by the DFT analysis, could facilitate the promoted electron transferring, resulting in the enhanced catalysis of N-doped MoS2 nanozymes, in addition to the high catalytic stability in water. Such a controllable plasma treatment strategy may open a new door toward the large-scale applications for doping heteroatoms into various nanozymes with improved catalysis performances.
研究领域:
材料科学
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生物医学工程
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE CHEMICAL LETTERS
·
2021
·
IF 6.779
Min Xie,Chaobo Huang,Yongqi Liang,Shuang Li,Liping Sheng,Yi Cao
MoS 2 nanosheets (NSs) are novel 2D nanomaterials (NMs) with potential uses in many areas, and therefore oral exposure route to MoS 2 NSs is plausible. Currently, MoS 2 NSs are considered as biocompatible NMs , but there is lacking of systemic investigations to study the interactions of MoS 2 NSs with intestinal cells. In this study, we exposed the 3D Caco-2 spheroids to MoS 2 NSs or MoS 2 powders (denoted as MoS 2 -bulk), and investigated the potential adverse effects of MoS 2 -materials based on transcriptomics and lipidomics analysis. As expected, both MoS 2 NSs and MoS 2 -bulk were dose-dependently internalized into 3D Caco-2 spheroids but did not induce cytotoxicity, membrane disruption or decrease of thiols. However, the Gene Ontology (GO) and Kyoto Encyclopedia of Gene and Genomes (KEGG) analysis indicated that nutrient absorption and metabolism was decreased. One of the most significantly decreased KEGG pathways is fat digestion and absorption (map04975), and Western blotting analysis further showed that fatty acid binding protein 1 and apolipoprotein A1 , key proteins involved in fat digestion and absorption, were down-regulated by MoS 2 NSs or MoS 2 -bulk. In addition, BODIPY 493/503 staining suggested that exposure to MoS 2 NSs and MoS 2 -bulk decreased lipid levels in the spheroids. However, lipidomics data indicated that MoS 2 materials only decreased 8 lipid classes, including lysophosphatidylcholine , lysodimethylphosphatidylethanolamine, N -acylethanolamine, ceramide phosphoethanolamines , gangliosides , lysosphingomyelin and sulfatide, whereas most of the lipid classes were indeed increased. In addition, MoS 2 NSs was more potent to decrease the lipid classes compared with MoS 2 -bulk. Combined, the results from this study showed that MoS 2 NSs and bulk materials were non-cytotoxic but altered lipid profiles in 3D Caco-2 spheroids.
研究领域:
毒理学
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生物医学工程
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2018
·
IF 4.244
Xiaorong Gan,Huimin Zhao,Kwok-Yin Wong,Dang Yuan Lei,Yaobin Zhang,Xie Quan
Surface functionalization is an effective strategy in the precise control of electronic surface states of two-dimensional materials for promoting their applications. In this study, based on the strong coordination interaction between the transition-metal centers and N atoms, the surface functionalization of few-layer MoS 2 nanosheets was successfully prepared by liquid phase exfoliation method in N, N-dimethylformamide (DMF), 1-methyl-2-pyrrolidinone, and formamide . The cytotoxicity of surface-functionalized MoS 2 nanosheets was for the first time evaluated by the methylthiazolyldiphenyl-tetrazoliumbromide assays. An electrochemical sensor was constructed based on glass carbon electrode (GCE) modified by MoS 2 nanosheets obtained in DMF, which exhibits relatively higher sensitivity to Cd 2+ detection and lower cytotoxicity against MCF-7 cells. The mechanisms of surface functionalization and selectively detecting Cd 2+ were investigated by density functional theory calculations together with various spectroscopic measurements. It was found that surface-functionalized MoS 2 nanosheets could be generated through Mo-N covalent bonds due to the orbital hybridization between the 5 s orbitals of Mo atoms and the 2p orbitals of N atoms of the solvent molecules. The high selectivity of the sensor is attributed to the coordination reaction between Cd 2+ and O donor atoms of DMF adsorbed on MoS 2 nanosheets. The robust anti-interference is ascribed to the strong binding energy of Cd 2+ and O atoms of DMF. Under the optimum conditions, the electrochemical sensor exhibits highly sensitive and selective assaying of Cd 2+ with a measured detection limit of 0.2 nM and a linear range from 2 nM to 20 μM.
研究领域:
材料科学
·
分析化学
·
生物医学
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2014
·
IF 4.086
Jingwei Huang,Yuqing He,Jun Jin,Yanrong Li,Zhengping Dong,Rong Li
A novel Ni nanoparticle-MoS 2 nanosheet hybrid was prepared by chemically reducing Ni nanoparticles on MoS 2 nanosheet for the non-enzymatic detection of glucose. The morphology and structure of the Ni-MoS 2 hybrid were investigated by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results indicated that Ni nanoparticles with an average diameter of 6 nm were successfully deposited on MoS 2 nanosheet. Electrocatalytic activity of the as-prepared nanomaterials towards glucose oxidation was investigated by cyclic voltammetry and amperometric measurement in alkaline media. An excellent sensitivity value of 1824 μA mM −1 cm −2 with a wide linear range (up to 4 mM) and low detection limit of 0.31 μM were gained by Ni-MoS 2 hybrid fabricated sensor. The superior catalytic activity and low expense make Ni-MoS 2 hybrid very promising for applications in direct sensing of glucose.
研究领域:
生物化学
·
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Gaoliang Chen,Jin Li,Fangling Zhou,Renze Zhang,Hongmin Zhu,Fanli Meng
To improve the issues of interference resistance and selectivity, as well as the challenge of multiparameter detection using single sensors in the field of sensor technology, this study develops a potential multifunctional optical fiber sensor and a multiparameter fusion detection method. During the sensor fabrication process, the two-dimensional detection mechanism of the single mode-no-core-single mode (SNS) optical fiber structure was demonstrated through optical principles and simulation analysis. In addition, improvements were made to the preparation method of molybdenum disulfide nanosheets (MoS 2 NS) and the dip-coating method for the transmissive optical fiber structure. These modifications enhanced the sensor’s sensitivity to formic acid (FA) gas by ∼5 times and reduced the detection limit to 2/5 of that of its predecessor. The proposed method enables the fusion detection of target and interference parameters, and its effectiveness has been validated through experiments. The introduction of this method will not only help address the issues of interference resistance and selectivity in sensors but also contribute to the advancement of sensor integration technology.
研究领域:
传感器技术
·
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
RENEWABLE ENERGY
·
2020
·
IF 6.274
Qingmiao Wang,Yi Qin,Feifei Jia,Yanmei Li,Shaoxian Song
To deal with water scarcity, solar steam generation has been widely regarded as one of the promising methods for freshwater production. In this work, for the first time, a novel recyclable MoS 2 -based nanocomposite (magnetic MoS 2 nanosheets) was fabricated via the in-situ growth of nano Fe 3 O 4 on the polydopamine (PDA)-functionalized MoS 2 nanosheets , and subsequently applied as the solar absorber in the volumetric evaporation systems to generate solar steam. The magnetic MoS 2 nanosheets showed a superhigh solar absorption of over 96% within the whole wavelength range of 200–2500 nm. As a result, a high evaporation efficiency of 79.2% under the low illumination of 2.5 kW m −2 was achieved. In addition, the magnetic MoS 2 nanosheets not only showed the long-term well dispersion in aqueous solution due to the introduction of hydrophilic PDA, but also exhibited a fast and effective separation from aqueous solution with the help of the decorating nano Fe 3 O 4 , which much benefited to the continuously efficient solar steam generation and its good recyclability , respectively. Therefore, the MoS 2 -based nanomaterials in this work showed good prospects for solar energy harvesting .
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2018
·
IF 8.173
Wei Zhang,Zhichao Dai,Xue Liu,Jimin Yang
A high-performance sensing platform based on poly-xanthurenic acid (PXA) film functionalized MoS 2 nanosheets was developed for electrochemical detection of circulating tumor DNA in peripheral blood. The MoS 2 nanosheets were obtained using a simple ultrasonic method from bulk MoS 2 . The physical adsorption between MoS 2 and aromatic XA monomers effectively improved the electropolymerization efficiency, accompanied with an increased electrochemical response of PXA. The obtained PXA/MoS 2 nanocomposite not only served as a substrate for DNA immobilization but also reflected the electrochemical transduction originating from DNA immobilization and hybridization without any complex labelling processes or outer indicators. The immobilization of the probe ssDNA was achieved via noncovalent assembly due to the π–π interaction between PXA and DNA bases. After the hybridization of the probe ssDNA with the target DNA, the formation of helix structure induced the resulted dsDNA to be released from the surface of the PXA/MoS 2 nanocomposite. The detection limit of this constructed DNA biosensor was calculated in the linear target DNA concentrations range from 1.0 × 10 –16 mol/L to 1.0 × 10 -10 mol/L and it was found to be 1.8 × 10 –17 mol/L.
研究领域:
生物医学工程
·
分子诊断学
·
纳米生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2020
·
IF 4.939
Yuewei Li,Xianglu Yin,Xiaohui Huang,Xiaolin Liu,Wei Wu
An efficient and scalable method combining ball-milling and liquid-phase exfoliation was used to prepare MoS 2 nanosheets . Ammonium bicarbonate as an exfoliation aid could accelerate the delamination and pulverization of bulk MoS 2 during preparation. The ball-milled MoS 2 was further exfoliated by sonication (S–MoS 2 NS) or high-speed shear-exfoliation (H–MoS 2 NS) to obtain MoS 2 nanosheets dispersion with high concentration. Moreover, MoS 2 quantum dots were also obtained by prolonging sonication time (S–MoS 2 QS). Most of S–MoS 2 NS and H–MoS 2 NS have lateral dimensions less than 150 nm. The S–MoS 2 QS size concentrates at around 5 nm. The H–MoS 2 NS mixed with aminated multi-walled carbon nanotubes (MWCNT) could form H–MoS 2 NS/MWCNT composites with a good conductive network, and was used as a hydrogen evolution reaction (HER) catalyst. The H–MoS 2 NS/MWCNT composites containing 56 wt% H–MoS 2 NS exhibited a favorable HER activity with a low overpotential of 284 mV at 10 mA/cm 2 , a Tafel slope of 97 mV/dec and good stability in acid medium.
研究领域:
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）