POLYMER
·
2025
·
IF 4.5
Qinghao Guo,Xuehao Feng,Zhizheng Gao,Xiangyu Teng,Zezheng Qiao,Chuang Zhang,Zhixing Ge,Wenguang Yang
Bioinspired crawling robots fabricated from flexible materials have received considerable attention in recent years. However, existing solutions for crawling robots capable of multi-directional locomotion primarily focus on the complex driving mode. This study explores invertebrate reptiles inspired soft crawling robots driven by near-infrared (NIR) light. A composite hydrogel with excellent photo-responsive properties is prepared by ingeniously combining poly(N-isopropylacrylamide) (PNIPAM) with multi-walled carbon nanotubes (MWCNTs). The crawling robot, when driven by NIR light, achieves an average speed of 0.17 mm/s. It can perform complex tasks such as crawling along a predefined trajectory, crossing obstacles, and traversing mazes via remote control with NIR light. This design holds significant significance for advancing flexible crawling robots and provides valuable insights for the research of bionic robots driven by NIR light.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Xiaojing Guo,Yejing Huang,Wanxiang Yu,Xiao Yu,Xiufen Han,Haiyun Zhai
Multi-walled carbon nanotubes modified with iron oxide and manganese dioxide (MWCNTs-Fe 3 O 4 −MnO 2 ) was synthesized by using iron oxide (magnetic agent) and manganese dioxide (surface enhancer agent) to further approach in a magnetic solid-phase extraction (MSPE) coupled with high performance liquid chromatography (HPLC) method for the determination of bisphenol A (BPA) in plastic bottled drink samples. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray (EDX), Fourier-transform infrared spectroscopy (FTIR), vibrating sample magnetometer (VSM), and BET surface area measurement (BET) were used to characterized the materials. MWCNTs-Fe 3 O 4 MnO 2 are more effective for BPA adsorption than other materials which compared in this study. The binding performances of sorbent were evaluated by static and kinetic adsorption experiments. The data were well fitted to the Langmuir isotherm model and pseudo-second-order model, which the maximum adsorption capacity ( q max ) and the contact time of initial concentrations to achieve equilibrium were found to be 132.9 mg g −1 and 150 min, respectively. After adsorption, MWCNTs-Fe 3 O 4 −MnO 2 can be conveniently and quickly separated from the media by an external magnetic field, and adsorption-desorption capacity can remain at least 6 times of usage. Several parameters affecting the extraction efficiency were investigated. Under optimal conditions, the sorbent was successfully applied to MSPE followed by HPLC determination of BPA in real sample. The limit of detection (LOD) and limit of quantification (LOQ) values of MSPE-HPLC was 0.092 ng mL −1 and 0.167 ng mL −1 , respectively. Spiked recoveries ranged from 94.9 to 103.4% for four real samples, with relative standard deviations of less than 6.7%. It was concluded that the synthesized MWCNTs-Fe 3 O 4 −MnO 2 could be used as an efficient adsorbent for the determination of BPA in different plastic bottled drink samples.
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2019
·Vol. 21
·期 4
·1-7
·
IF 2.009
Xie Chong,Shi Jian-Wen,Yang Shenghui,Li Xifei
The MnO x -TiO 2 /MWCNTs nanocomposites were used as De-NO x catalysts to study the deep-rooted reason for the deactivation. Based on a series of characterization on as-prepared catalyst and poisoned catalyst, the results showed that the chief culprit for the deactivation is the micropores in the De-NO x catalyst. The formed ammonium (bi)sulfate in the micropores during the SCR reaction process could not be took away by the gas flow soon and then deposited on the catalyst surface gradually, and further covered the active sites. And the poisoned catalysts could be recovered partly rather than fully by heat treatment at 500 °C because of the decomposition of the ammonium (bi)sulfate and the phase transition of the TiO 2 .
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Luheng Wang,Maoyuan Nan,Xisi Long
The coil-shaped element based on α-Fe 2 O 3 doped multi-walled carbon nanotubes (MWCNTs) is fabricated by sputtering and spraying technology for simultaneously measuring the gap and ethanol vapor at room temperature. The experimental results show that with the increase of spraying time, the gas response properties of MWCNTs-based coil-shaped elements change from p-type to n-type, while the gas response properties of the coil-shaped elements based on α-Fe 2 O 3 doped MWCNTs change from n-type to p-type with the increase of mass ratio of α-Fe 2 O 3 to MWCNTs. Particularly, the coil-shaped element with a mass ratio of 100 exhibits the highest gas response value and gap sensitivity in the gap range of 0–0.5 mm, the gas response value of impedance amplitude, impedance angle, and resistance is 0.659 %, 0.265 %, and 6.768 % at the ethanol vapor concentration of 5000 ppm, respectively. The absolute/relative gap sensitivity of impedance amplitude and impedance angle is 54,101.8 Ω·mm −1 /4.589 %·mm −1 and 2.069°·mm −1 / 5.287 %·mm −1 in the gap range of 0–0.1 mm, respectively. Finally, a signal processing method is proposed for the simultaneous measurement of ethanol vapor concentration and gap. These results lay a foundation for the development of MWCNTs-based sensors and the sensors applied between narrow gaps.
✓ 已验证
产品关联
DOI
高影响因子
POLYMER ENGINEERING AND SCIENCE
·
2016
·Vol. 56
·期 10
·1118-1124
·
IF 1.719
Weijian Xiong,Xue Gao,Dayong Gui,Xueqing Cai,Guiming Tan,Jianhong Liu
A liquid crystalline molecule, 4'-allyloxy-biphenyl-4-ol (AOBPO), was used to functionalize carbon nanotubers (CNTs) via physical means and chemical means, respectively. The physically functionalized CNTs (AOBPO-CNTs) and chemically functionalized CNTs (AOBPO-O-CNTs) were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), fluorescent spectroscopy, and Raman spectroscopy. The two functionalized CNTs were mixed with silicone resin as fillers to fabricate organosilicone nanocomposites. Scanning electron microscopy (SEM) images indicated that the dispersion of CNTs in silicone resin and compatibility of CNTs with silicone resin were improved effectively after functionalization with liquid crystal via physical or chemical means. The thermal and mechanical properties testing indicated that, the chemically functionalized CNTs got a better effect in improvement of mechanical properties of silicon resin than the physically functionalized CNTs, whereas the physically functionalized CNTs was more applicable to enhance the thermal conductivity of silicon resin. The tensile strength of AOBPO-O-CNTs/silicon resin increased by 37.8% over that of neat CNTs/silicon resin when the mass fraction of AOBPO-O-CNTs was 1.0%, and the elastic modulus of AOBPO-O-CNTs/silicon resin increased by 32.8% over that of CNTs/silicon resin if it came up to 2.0%. The thermal conductivity of the resin filled with AOBPO-CNTs was improved to be 1.176 W (m −1 K −1 ) at the mass fraction of 5.0%, which was enhanced more than 73.2% over that of CNTs/silicon resin. POLYM. ENG. SCI., 56:1118–1124, 2016. © 2016 Society of Plastics Engineers
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Kaiwen Xiao,Binhao Li,Huiting Diao,Qing Xu
A novel MON effectively integrates with magnetic MWCNT to construct MMWCNT@MON(MMON). • The MMON/MMWCNT int-ext hybrid exhibits substantial synergistic effects. • MMON/MMWCNT magnetically immobilized on the MGCE renders favorably stable signals. • MMON/MMWCNT@MGCE exhibits high CA sensitivity and low LOD. • The sensor successfully detected CA levels in various fruits with satisfactory recovery. Caffeic acid (CA) is a phenolic compound widely distributed in plants, possessing anti-inflammatory and antioxidant activities, yet it is also associated with potential carcinogenic risks. Therefore, developing a simple and sensitive electrochemical sensor for CA detection is of great significance. In this work, a novel magnetic sensor was fabricated for the first time by combining a room-temperature-synthesized microporous organic network (MON) with magnetic MWCNTs, and the magnetic property of the composite was utilized in conjunction with a magnetic glassy carbon electrode (MGCE) to achieve a binder-free and robust assembly. The sensor was employed for highly sensitive detection of CA, achieving an ultrahigh sensitivity of 124.9 μA μM −1 cm −2 . The composite exhibited remarkable synergistic effects: MMWCNTs provided structural support, magnetism, and signal amplification, while MMON (472.48 m 2 g −1 , 160.5 Ω) demonstrated superior conductivity compared to pure MON (493.44 m 2 g −1 , 409.7 Ω) while retaining a high specific surface area. The sensor displayed excellent electrocatalytic performance toward CA, with a wide linear range of 0.05–10 μM, a detection limit of 3.98 nM (S/N = 3), and satisfactory reproducibility, selectivity, and stability. Real-sample analysis of freshly squeezed juices from apples, blueberries, grapes, and tomatoes via the standard addition method, validated by UV–Vis spectrophotometry, yielded recoveries ranging from 94.9% to 102.8%, demonstrating satisfactory results. Compared to traditional sensors, this sensor offers significant advancements in preparation time, economic efficiency, and sensing performance, demonstrating great potential for rapid and sensitive detection in the food industry. Download: Download high-res image (98KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Kaixin Liu,Mingfei Pan,Liping Hong,Xiaoqian Xie,Jingying Yang,Shan Wang,Zhijuan Wang,Shuo Wang
A hydrophobic carboxyl functionalized phosphonium-based ionic liquid (IL) (( 5 -carboxypentyl) triphenylphosphonium bis (trifluoromethyl)sulfonyl) amide, TPP-HA[TFSI]) was synthesized through a simple hydrothermal approach. Based on the π-π and cation-π interactions with multi-wall carbon nanotubes (MWCNTs), a TPP-HA[TFSI]@MWCNTs hybrid was prepared to immobilize hemoglobin (Hb) to fabricate a simple and effective electrochemical sensing platform for the detection of methyl parathion (MP) in vegetables. Spectroscopic and electrochemical results show that TPP-HA[TFSI]@MWCNTs substrate synergistically provided a good biocompatible microenvironment for Hb, and the hydrophobicity of TPP-HA[TFSI] and the π-π interaction and hydrogen bonding between TPP-HA[TFSI]@MWCNTs, Hb and nafion (NF) were conducive to maintain the stability and integrity of the modified electrode interface. The TPP-HA[TFSI]@MWCNTs with large surface area and high conductivity promoted the exposure of the electroactive center of Hb and the direct electron transfer between Hb and the electrode, which effectively amplified the electrochemical signal and improved the sensitivity of MP detection. The constructed electrochemical sensing platform had a wider linear range (2–14 ng mL -1 ) and a lower detection limit (0.62 ng mL -1 ) for MP, and had acceptable repeatability, reproducibility, stability and anti-interference ability. This results indicated that the phosphonium-based ILs functionalized MWCNTs was an effective substrate for the immobilization of biological components, which have broad prospect in the construction of electrochemical sensing interfaces.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 9
·1-11
·
IF 6.232
Tang Tingting,Yang Fan,Wang Lina,Zhao Chunxin,Nie Fei,GuopingYang
An ultrasensitive sandwich electrochemiluminescence (ECL) biosensor was designed for determination of concanavalin A (ConA) through the specific carbohydrate-ConA interactions. Three-dimensional porous metal-organic framework (Zn-MOF) was synthesized, which loaded a large amount of luminescent reagents as luminol by encapsulating into its pores to form Zn-MOF@luminol complex. Interestingly, Zn-MOF also acted as the coreactant accelerator in the luminol-H 2 O 2 ECL system. This Zn-MOF@luminol complex was used as the signal probe to achieve a super strong and stable ECL signal. In addition, three-dimensional hierarchical molybdenum disulfide nanoflower and multiwalled carbon nanotubes complex (MoS 2 NF@MWCNTs) with peroxidase-mimicking enzyme property were used as a substrate to modify the glassy carbon electrode to further enhance the ECL signal of luminol by promoting decomposition of H 2 O 2 into reactive oxygen species (ROSs). In addition to the horseradish peroxidase (HRP) catalysis effect on the luminol ECL signal, a triple amplified ConA sandwich ECL sensor with high sensitivity sensor was constructed. The linear range for ConA detection was from 0.5 pg/mL to 100 ng/mL with a detection limit of 0.3 pg/mL ( S / N = 3). The recovery test for ConA in human serum samples was performed with satisfactory results.
Graphical abstract
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Weilu Liu,Fan Cui,Haifeng Li,Shuang Wang,Beibei Zhuo,Shuang Wang
A novel hybrid networks of molecularly imprinted poly(9-carbazoleacetic acid) and multi-walled carbon nanotubes (MWCNTs) was developed applying the electro-polymerization technique for the simultaneous voltammetric determination of dopamine and epinephrine. A carbazole derivative, 9-carbazoleacetic acid, was synthesized and used as a monomer for the first time. Owing to the introduction of carboxyl group, as well as the π-conjugated rigid plane structure of 9-carbazoleacetic acid, the molecularly imprinted poly(9-carbazoleacetic acid) afforded sufficient non-covalent interactions with the templates, enabled a good selectivity of the sensor. The MWCNTs acted as the supportive material for the molecularly imprinted poly(9-carbazoleacetic acid), resulted in the high specific surface area and high conductivity of the sensing interface. The as-prepared hybrid networks exhibited enhanced sensitivity and selectivity in the simultaneous voltammetric determination of dopamine and epinephrine. Experimental parameters involved in the sensor fabrication process were evaluated. A wide linear range of 0.04 ∼ 70 μM were obtained for the simultaneous detection of dopamine and epinephrine. The developed sensor, that requires only 100 μL samples for analysis, was applied to detect dopamine and epinephrine simultaneously in rat plasma sample. The recoveries were found in the range from 97.15 % to 105.5 %, indicating a promising potential in medical care and biological applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 140
·期 33
·e54288
·
IF 3
Mingguang Zhang,Peifeng Feng,Xiuye Lian,Gang Zhao,Cheng Liu,Nan Li,Jian Xu,Yousi Chen,Xigao Jian
In order to reduce the detection limit and improve the working range of flexible strain sensor, in this article, we reported a multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (rGO) co-decorated multifunctional core spurn yarn flexible strain sensor (CGY FSS). It was found that the well lapping between MWCNT and rGO endows sensor with high working range (> 300%), while the helical structure of core-spun yarn makes it sensitive to very tiny deformation (0.1%). To improve its dynamic durability, polydopamine (PDA) was used to improve the interface bonding force between yarn and conductive materials, which ensures the sensor conduct stable electrical signals during 10,000 stretching cycles test at 10% strain. These features made it suitable for human motion detection and structural health monitoring. Moreover, due to the abundant carboxyl groups on the carbon material surface and the employment of polymer-based yarn, CGY FSS also showed good responsiveness to water vapor and acetone gas. It can be conceived that this as prepared strain sensor shows promising potential in smart device application with multiple response mechanism.
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Xiaoqin Wei,Hao Guo,Zongyan Lu,Lei Sun,Zhilan Pan,Bingqing Liu,Liping Peng,Wu Yang
Uric acid and dopamine are closely related to the health of the organism, so it is important to determine them simultaneously and efficiently. In this paper, the metal-organic framework DUT-67 was in situ grown on the surface of bimetallic oxide ZnCo 2 O 4 nanoflowers , and then ultrasonically compounded with multi-walled carbon nanotubes (MWCNTs) to prepare DUT-67/ZnCo 2 O 4 -MWCNTs composite. The prepared composite was characterized by XRD , SEM, XPS , FTIR, BET and other techniques. Finally, an electrochemical sensor based on DUT-67/ZnCo 2 O 4 -MWCNTs composite modified glassy carbon electrode for simultaneous detection of dopamine (DA) and uric acid (UA) was fabricated. The introduction of ZnCo 2 O 4 into the composite efficiently overcame the disadvantage of the easy aggregation of DUT-67 and produced a synergistic effect with MWCNTs. The electron transfer rate between the electrode and the electrolyte solution was accelerated, and the detection signals of the target molecules were amplified. After characterizing the electrochemical properties of the composite electrode, it was found that the constructed electrochemical sensor showed low detection limits for DA and UA, which were 12 nM and 8.7 nM, respectively, and the wide linear range of 1.0–180.0 μM. Besides, the sensor had excellent reproducibility, repeatability, anti-interference and stability. The proposed sensor was also successfully used to determine the contents of DA and UA in dopamine injection and urine samples with relatively satisfactory recovery rates. This work not only provides a new strategy for the preparation of MOF modified electrodes , but also has a potential application prospect in bioassays.
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Mingfang Zhu,Hongqing Ye,Mushen Lai,Jianshan Ye,Rui Li,Wenhao Zhang,Huanru Liang,Rongkun Zhu,Huajun Fan,Shi Chen
A sensitive and novel carbon fiber microelectrode (CFME) modified by the gold nanoparticles sensitized partially reduced multilayer graphene oxide-multiwall carbon nanotubes (pRGO-MWCNTs/Aus) was developed for the simultaneous determination of dihydroxybenzoic acid (DHBA) isomers. The surfaces of modified microelectrodes were characterized by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS). The synergistic effect of pRGO-MWCNTs and Aus reduced the overpotential, enhanced the electrocatalytic ability and improved the peak shape of DHBAs. The modified microelectrode exhibited a good electrochemical behavior followed by well-separated oxidation peaks of 2,3-DHBA, 2,5-DHBA and 2,6-DHBA at 0.637 V, 0.565 V and 0.950 V, respectively, so that the three DHBA isomers can be detected simultaneously without previous separation. And the peak currents were linearly dependent on 2,3-DHBA, 2,5-DHBA and 2,6-DHBA concentrations using differential pulse voltammetry (DPV) method in the ranges of 8–9000 nM, 8–8000 nM and 20–8000 nM with detection limits of 0.34 nM, 0.55 nM and 1.3 nM (S/N = 3) for the simultaneous determination, respectively. The microsensor has good repeatability, stability, reproducibility and acceptable anti-interference performance. And it has been successfully applied to the real-time monitor the uptake of three DHBA isomers by plant roots.
✓ 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）