CARBON
·
2017
·
IF 6.337
Lei Tang,Yuting Luo,Shuchen Zhang,Qichong Zhang,Yagang Yao,Jin Zhang
A novel substrate-anchored catalyst, solid solution, was developed, which experienced the annealing treatment of the single crystal MgO substrates with Co species deposited. The formation of specific structure on MgO surface and sub-surface makes Co catalysts anchored. Subsequent H 2 reduction treatment continuously released fresh active catalysts from this anchored special structure for SWNTs nucleation and growth. This gradual releasing behavior provides more catalytic opportunities to nucleate and realizes high density SWNTs growth.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Zhaoyang Li,Yahong Li,Weijun Zhao,Yuezhan Feng,Bing Zhou,Chuntai Liu
Flexible transparent electromagnetic interference (EMI) shielding films in visual windows are crucial for the innovation of optoelectronic devices, but the challenge of balancing light transmittance and EMI shielding effectiveness (SE) still exists. Herein, this work described a flexible transparent MXene@SWNTs/PC film with a hierarchical conductive layer that was fabricated via an alternating rotation spraying method. The multi-scale hierarchical structure configured with 1D SWNTs and 2D MXene endow the obtained film with good comprehensive properties, i. e, low sheet resistance of 32.8 Ω/sq at 56.1% light transmittance, thus causing a satisfactory EMI SE of 20.8 dB. Moreover, the transparent shielding films exhibit remarkable flexibility, which can maintain steady EMI SE after 1000 continuous bending cycles. More importantly, the low sheet resistance and high light absorption capacity of hybrid conductive layer facilitate the transparent shielding film with low-voltage-driven electric heating effect and outstanding photothermal conversion ability, respectively, ensuring the normal operation under extreme cold condition. The combination of good light transmittance, satisfactory EMI shielding performance, and multi-source thermal response enables MXene@SWNTs/PC film to have great potential as a transparent shielding film in emerging optoelectronic devices.
研究领域:
材料科学
·
电子工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 8
·1267
·
IF 5.719
Gang Lu,Changgeng Shuai,Yinsong Liu,Xue Yang,Xiaoyang Hu
To adapt to the complex application of polyurethane bearings, it is feasible to improve the tribological performance of single polyurethane-based friction materials through the synergistic effect produced by multi-component-lubricating fillers. In this context, rather than using tungsten disulfide (WS2), which has demonstrated excellent self-lubricating performance as a lubricating oil additive, this paper proposes that WS2and single-walled carbon nanotubes (SWNTs) can be designed for addition into a polyether 4,4′-diphenylmethane diisocyanate (MDI) polyurethane matrix as self-lubricating fillers so as to explore the synergistic effect of micro- and nano-lubricating fillers on the tribological performance of polyurethane matrix materials. Through a series of characterizations and tests, it was found that the dispersion of two-component-lubricating additives in a polyurethane matrix is improved when the ratio of WS2to SWNTs is roughly 2:1. In this case, the tribological performance of polyurethane matrix composites is more satisfactory than at other ratios. In addition, compared with the blank sample, the tribological performance of the synergistically modified polyurethane composites under dry friction is more significantly improved with the increase in contact load, while there is no significant improvement under water lubrication. Aside from contributing to the idea of exploring the synergistic effect of WS2and other micro or nanofillers, this method also opens up the possibility of practically applying WS2in the field of friction.Keywords:polyurethane elastomer;WS2;SWNTs;synergistic effect;tribological performance
研究领域:
材料科学
·
摩擦学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Quanyu Wang,Zichao Wang,Zhiqian Li,Pu Liu,Zonglin Pan,Zhaoqian Xie,Yongxin Song,Xuegang Zhang,Ruisong Xu
Obtaining multi-mode tactile information with one sensor in deep sea is greatly needed yet still challenging. In this paper, a flexible deep sea tactile sensor is reported, capable of detecting object's conductivity, hardness, pressing pressure and position simultaneously just by one touch. The sensor works by using single-walled carbon nanotubes doped thermoplastic polyurethane elastomer (SWNTs-TPU film) for differentiating object's conductivity based on the work function difference induced electron transfer. A porous anionic aliphatic waterborne polyurethane film containing carboxyl functional groups (C-WPU) is used for generating ionic currents under pressing to determine the pressing pressure and position and recognize the relative hardness of an object. It is found that the magnitude of current signal generated by a metallic object is much larger than that of an insulative object. The signal magnitude increases with the increase in the applied pressure, the pressing area and the film thickness. Furthermore, completely encapsulating the C-WPU film and introducing carboxylic functional groups significantly improve the sensitivity (maximum 1.2 kPa −1 ). The response time and recovery time of sensing signals are 150 and 530 ms respectively. A pressure detection range of 45–625 kPa is achieved, with a pressure detection resolution of 9.2 kPa. The signal magnitude is decreased only by 10.54% when the sensor is placed under a simulated 100 m water depth. Proof of concept demonstration of underwater object discrimination and hardness recognition with this sensor placed on a mechanical finger of a ROV (Remotely Operated Vehicle) is successfully achieved. This work provides a new solution for multi-modal tactile information sensing in deep-sea environment.
研究领域:
材料科学
·
纳米技术
·
柔性电子器件
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传感器技术
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水下机器人
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触觉感知
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聚合物复合材料
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2014
·Vol. 6
·期 23
·9410-9418
·
IF 1.938
Lingxi Yang,Lu Wang,Kunjing Li,Baoxian Ye
A new voltammetric sensor, based on single-walled carbon nanotubes (SWNTs) modified glassy carbon electrode, was established and used for the determination of neohesperidin dihydrochalcone (NHDC). The electrochemical characterization of NHDC on this sensor was studied systematically by cyclic voltammetry, and the kinetics parameters were calculated for the first time. Compared with a bare GCE, the proposed sensor exhibited excellent redox activity towards NHDC, and a new voltammetric analytical method for NHDC was proposed with a wide linear range from 5 × 10−8 mol L−1 to 8 × 10−6 mol L−1 and a low detection limit of 2 × 10−8 mol L−1. In addition, a reasonable mechanism was also proposed and discussed. Finally, the developed method was successfully applied for the quantitative determination of NHDC in beverages with high accuracy and satisfactory recovery results.
研究领域:
分析化学
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电化学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
·
2025
·
IF 1.8
Hai-Wen Tang,Jin-Jin Jiang,Liu-Si Yu,Hong-Lin Yu,Yun-Qian Zhong,Li-Mei Yu,Su-Jun Wang,Huan Zhang
This study presents a dual-carbon modified LiMn0.6Fe0.4PO4 cathode (LMFP/SWNT/C) through the combined integration of amorphous carbon and single-walled carbon nanotubes (SWNTs). The composite was synthesized via a solvothermal approach followed by carbonization, forming a homogeneous conductive network with enhanced graphitization (IG/ID ratio = 3.24–4.24 versus 0.98–0.99 for LMFP/C). Electrochemical characterization revealed superior performance, including a high discharge capacity of 160.8 mAh g−1 at 0.1C and excellent cycling stability (124.9 mAh g−1 with 92.6% capacity retention after 280 cycles at 1C). In-situ electrochemical impedance spectroscopy (EIS) coupled with distribution of relaxation times (DRT) analysis indicated that the addition of SWNTs could improve the electronic conductivity. These results demonstrate the effectiveness of hybrid carbon architectures for optimizing LMFP cathode materials.
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2015
·
IF 2.587
Bo Jin,Juan Shen,Rufang Peng,Congdi Chen,Qingchun Zhang,Xiaoyan Wang,Shijin Chu
Dimethyl sulfoxide (DMSO) with sodium carbonate (Na2CO3) is an effective catalyst system for C60 cyclopropanation through the Bingel reaction. Various bromomalonic esters, brominated β-keto esters, brominated 1,3-diketones, and other bromo-substituted active methylene compounds can react with C60 in the presence of DMSO and Na2CO3 to achieve excellent yields of the corresponding methanofullerenes at 10 °C. Moreover, this proposed methodology has been also employed successfully to functionalize [70]fullerene, single-walled carbon nanotubes (SWNTs), and graphene. This protocol is beneficial because it involves short reaction time, high yield, and a simple procedure. Additionally, this method does not need a strong base, such as sodium hydride and 1,8-diazabicyclo[5,4,0]undec-7-ene, because inexpensive Na2CO3 can be the catalyst.
研究领域:
有机化学
·
纳米材料化学
·
碳材料科学
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功能化修饰
·
催化化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2014
·Vol. 5
·期 8
·5604-5610
·
IF 3.708
Mei Yu,Jindan Zhang,Songmei Li,Yanbing Meng,Jianhua Liu
The performances of photovoltaic devices can be improved by increasing light-harvesting and charge collection respectively. The design and synthesis of nanocomposites with the ability of enhancing the generation and collection of the photo-generated electrons provide a significant way to improve the power conversion efficiency (PCE). Herein, SWNTs@(TiO2/Ag/Au) nanocomposites were synthesized and successfully integrated into photoanode films of dye-sensitized solar cells (DSSCs) to improve the power conversion efficiency. The synthesis processes were based on multi-functional DNA. DNA not only works as a dispersing agent preventing SWNTs bundling but also as a sacrificial mold assembling TiO2, Ag and Au nanoparticles on the surface of the SWNTs. The synthesized SWNTs@(TiO2/Ag/Au) nanocomposites enhance the charge collection and light-harvesting of DSSCs simultaneously. With 2.45 wt% SWNTs@(TiO2/Ag/Au) nanocomposites incorporating into the photoanode films, the PCE of the DSSCs increases from 6.8% to 8.3%.
研究领域:
材料科学
·
纳米科技
·
能源化学
·
光伏器件
·
表面科学
·
胶体与界面化学
✓ 已验证
DOI
高影响因子
CARBON
·
2018
·
IF 7.082
Zhaolan Zhai,Xinyan Yan,Ji Xu,Zhanqian Song,Shibin Shang,Xiaoping Rao
The phase behavior and aggregates induced by changes in pH in a sodium N -tetradecyl-maleimidepimaric carboxylate (C 14 -MPA-Na)/cetyltrimethylammonium bromide (CTAB) system have been investigated using rheology and cryogenic transmission electron microscopy (cryo-TEM). Viscoelastic solutions at a pH between 6.40 and 1.41, opalescent blue solutions at a pH between 1.41 and 1.32 and aqueous surfactant two-phase systems (ASTPs) at a pH between 1.32 and 0.56 are formed sequentially. The microstructures in the viscoelastic solutions are wormlike micelles that partially transform to vesicles in the opalescent blue solutions. The aggregates in the upper phase of the ASTPs are vesicles and lamellar micelles, and in the lower phase are spherical micelles. Further, Single-walled carbon nanotubes (SWNTs) were successfully hybridized into the wormlike micellar viscoelastic solutions. cryo-TEM, UV–Vis-IR, near-infrared photoluminescence (NIR-PL) and UV–Vis spectroscopy were used to study the dispersion of SWNTs in the viscoelastic solutions, and the results showed SWNTs can remain dispersed for more than 6 months at pH 6.40. The results obtained from rheology showed that the hybridization of SWNTs will not affect the aggregates and viscoelasticity compared that to the native viscoelastic solution. Above more, the SWNTs could be recycled by the pH-switched phase behaviors between viscoelastic solutions and ASTPs.
研究领域:
材料科学
·
胶体化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jiaxue Liang,Hang Qi,Feng Zhu,Shuqi Chen,Bohua Liu,Chongling Sun,Yanyan Wang
Real-time monitoring the drugs penetration into brain is crucial for clinical therapy of neurodegenerative diseases. In this study, a Blood-Brain Barrier-electrochemical sensing (BBB-ES) platform combining BBB on chip model and electrochemical sensing system was proposed, which facilitated stable BBB growth under fluidic conditions and realized real-time detection of L-Dopa across the BBB. Based on this system, the effects of fluid force on the cell morphology, skeleton arrangement and tight junction protein ZO-1 of BBB growth were evaluated, it was verified that the fluid force promote cell rearrangement. Additionally, L-Dopa detecting performance was optimized by modifying SWNTs-AuNPs-PPy/Tyr(Single-Walled Carbon Nanotubes-Au Nanoparticles-Polypyrrole/Tyrosinase) on electrochemical electrode, which showed a wide linear response range of 10–500 μM and excellent selectivity toward L-Dopa. The integrated BBB-ES system was finally applied to real-time monitor the penetration process of L-Dopa through the BBB, it was proved that the penetration of L-Dopa increased with the increase of flow rate and time, and finding that L-Dopa was delivered by passive diffusion without disrupting the integrity of BBB. Based on these findings, the system can be used to monitor the real-time process of different drugs penetrating BBB and even different organ barriers, which also provide the possibility to solve the clinical demand for drugs screen.
研究领域:
神经科学
·
生物医学工程
·
药学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2023
·
IF 7.4
Duo Chen,Na Chen,Fangning Liu,Yiming Wang,Huageng Liang,Yanbing Yang,Quan Yuan
Portable point-of-care testing (POCT) is currently drawing enormous attention owing to its great potential for disease diagnosis and personal health management. Electrochemical biosensors, with the intrinsic advantages of cost-effectiveness, fast response, ease of miniaturization, and integration, are considered as one of the most promising candidates for POCT application. However, the clinical application of electrochemical biosensors-based POCT is hindered by the decreased detection sensitivity due to the low abundance of disease-relevant biomolecules in extremely complex biological samples. Herein, we construct a flexible electrochemical biosensor based on single-stranded DNA functionalized single-walled carbon nanotubes (ssDNA-SWNTs) for high sensitivity and stability detection of miRNA-21 in human urine to achieve bladder cancer (BCa) diagnosis and classification. The ssDNA-SWNT electrodes with a 2D interconnected network structure exhibit a high electrical conductivity, thus enabling the ultrasensitive detection of miRNA-21 with a detection limit of 3.0 fM. Additionally, the intrinsic flexibility of ssDNA-SWNT electrodes endows the biosensors with the capability to achieve high stability detection of miRNA-21 even under large bending deformations. In a cohort of 40 BCa patients at stages I–III and 44 negative control samples, the constructed ssDNA-SWNT biosensors could detect BCa with a 92.5% sensitivity, an 88.6% specificity, and classify the cancer stages with an overall accuracy of 81.0%. Additionally, the flexible ssDNA-SWNT biosensors could also be utilized for treatment efficiency assessment and cancer recurrence monitoring. Owing to their excellent sensitivity and stability, the designed flexible ssDNA-SWNT biosensors in this work propose a strategy to realize point-of-care detection of complex clinical samples to achieve personalized healthcare.
研究领域:
生物医学工程
·
纳米技术
·
癌症诊断
·
电化学
·
即时检测设备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）