JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Sainan Liu,Hongtai Shen,Jiawei Xu,Xiaojun Zhou,Jianfei Liu,Zhenyang Cai,Xiaojun Zhao,Lairong Xiao
To develop an ultra-high-temperature resistant coating for a reusable thermal protection system, the preparation of a tantalum-based MoSi 2 -Mo coating by a new two-step process of multi-arc ion plating and halide activated pack cementation is presented. The coating has a dense structure and is well compatible with the tantalum substrate, which can be thermally shocked from room temperature to 1750 °C for 360 cycles without failure. The mechanism of the coating’s excellent resistance to high-temperature thermal shocks is that a strong-binding gradient interface and a dense SiO 2 oxide scale with good oxygen resistance are formed by the high-temperature self-diffusion of Si.
研究领域:
材料科学
·
高温防护技术
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2017
·Vol. 9
·期 46
·18516-18522
·
IF 7.367
Zhenrong Ye,Yunyu Sun,Hui Zhang,Bo Song,Bin Dong
In this paper, we report a unique phototactic (both positive and negative) micromotor based on platinum nanoparticle decorated carbon nitride. The phototaxis relies on the self-diffusiophoretic mechanism and different surface modifications. The micromotor reported in the current study does not require the addition of any external fuels and shows versatile motion behaviour, i.e. start, stop, directional and programmable motion, which is controlled by light. In addition, since the actuation of the precipitated micromotors at the bottom of a solution using light results in the opacity changes from transparent to translucent, we anticipate that the current micromotor may have potential application in the field of smart windows.
研究领域:
材料科学
·
纳米技术
·
光化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2025
·Vol. 32
·期 5
·1103-1113
·
IF 7.2
Wang Yan,Ni Peiyuan,Liu Yuling,Deng Tengfei
The enrichment of chromium in the magnetic iron chromite (Fe(Cr x Fe 1− x ) 2 O 4 ) phase is crucial for the recovery and recycling of chromium in stainless-steel pickling sludge. The kinetics and reaction mechanism of the solid-phase reaction between Fe 3 O 4 and Cr 2 O 3 were investigated using the diffusion couple method at 1473 K. Not only the diffusion behavior of Fe 2+ ions and Cr 3+ ions was elucidated, but also the solid solution behavior of Fe 3+ ions was discussed clearly. The microscopic morphology of the diffusion couple and the change in the concentrations of Fe and Cr cations across the diffusion layers were analyzed using scanning electron microscopy and energy dispersive spectroscopy. The self-diffusion coefficients of cations were calculated based on the concentration profiles of Fe and Cr, with the results indicating that the self-diffusion coefficient of the Fe ions was consistently higher than that of the Cr ions. Additionally, a mixture of Fe 3 O 4 and Cr 2 O 3 was annealed at 1373–1473 K for 1–5 h, and the kinetic parameters were calculated by studying the phase content of the product. The phase content of Fe(Cr x Fe 1− x ) 2 O 4 in the product was determined by Rietveld refinement of X-ray diffraction data, revealing that an activation energy ( E ) of 177.20 kJ·mol −1 and a pre-exponential factor ( B ) of 610.78 min −1 of the solid-phase reaction that produced the Fe(Cr x Fe 1− x ) 2 O 4 spinel.
研究领域:
材料科学
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2021
·Vol. 118
·期 42
·e2104481118
·
IF 11.205
Jintao Tong,Dalei Wang,Ye Liu,Xin Lou,Jiwei Jiang,Bin Dong,Renfeng Dong,Mingcheng Yang
In nature, microorganisms could sense the intensity of the incident visible light and exhibit bidirectional (positive or negative) phototaxis. However, it is still challenging to achieve the similar biomimetic phototaxis for the artificial micro/nanomotor (MNM) counterparts with the size from a few nanometers to a few micrometers. In this work, we report a fuel-free carbon nitride (C3N4)/polypyrrole nanoparticle (PPyNP)-based smart MNM operating in water, whose behavior resembles that of the phototactic microorganism. The MNM moves toward the visible light source under low illumination and away from it under high irradiation, which relies on the competitive interplay between the light-induced self-diffusiophoresis and self-thermophoresis mechanisms concurrently integrated into the MNM. Interestingly, the competition between these two mechanisms leads to a collective bidirectional phototaxis of an ensemble of MNMs under uniform illuminations and a spinning schooling behavior under a nonuniform light, both of which can be finely controllable by visible light energy. Our results provide important insights into the design of the artificial counterpart of the phototactic microorganism with sophisticated motion behaviors for diverse applications.
研究领域:
纳米技术
·
生物物理学
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
·
2019
·
IF 3.683
Jintao Tong,Dalei Wang,Danchen Wang,Fei Xu,Ruomeng Duan,Dafeng Zhang,Jian Fan,Bin Dong
The light-driven micromotor has been demonstrated to have great potential in the environmental remediation field. However, it is still challenging to develop highly efficient, ecofriendly, and visible-light-powered micromotors for organic pollutant degradation. In this paper, we report an ecofriendly micromotor based on iron phthalocyanine (FePc) and gelatin, which exhibits the visible-light-driven self-propulsion behavior using water fuel based on the photocatalytic reaction and self-diffusiophoresis mechanism. Fast motion behavior is observed which induces the rapid agitation of the solution. This, together with the excellent photocatalytic activity, makes the FePc-based micromotor highly efficient when utilized in the degradation of organic pollutants with a normalized reaction rate constant of 2.49 × 10–2 L m–2 s–1, which is by far the fastest and is far superior than the stationary counterpart. The external fuel-free propulsion and the high efficiency in pollutant degradation make the current micromotor potentially attractive for environmental remediation.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 33
·2402482
·
IF 27.4
Wanyuan Li,Baiyao Liu,Leyan Ou,Gangzhou Li,Dapeng Lei,Ze Xiong,Huihua Xu,Jizhuang Wang,Jinyao Tang,Dan Li
Emerging light-driven micro/nanorobots (LMNRs) showcase profound potential for sophisticated manipulation and various applications. However, the realization of a versatile and straightforward fabrication technique remains a challenging pursuit. This study introduces an innovative bulk heterojunction organic semiconductor solar cell (OSC)-based spin-coating approach, aiming to facilitate the arbitrary construction of LMNRs. Leveraging the distinctive properties of a near-infrared (NIR)-responsive organic semiconductor heterojunction solution, this technique enables uniform coating across various dimensional structures (0D, 1D, 2D, 3D) to be LMNRs, denoted as “motorization.” The film, with a slender profile measuring ≈140 nm in thickness, effectively preserves the original morphology of objects while imparting actuation capabilities exceeding hundreds of times their own weight. The propelled motion of these microrobots is realized through NIR-driven photoelectrochemical reaction-induced self-diffusiophoresis, showcasing a versatile array of controllable motion profiles. The strategic customization of arbitrary microrobot construction addresses specific applications, ranging from 0D microrobots inducing living crystal formation to intricate, multidimensional structures designed for tasks such as microplastic extraction, cargo delivery, and phototactic precise maneuvers. This study advances user-friendly and versatile LMNR technologies, unlocking new possibilities for various applications, signaling a transformative era in multifunctional micro/nanorobot technologies.
研究领域:
材料科学
·
微纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Yuzhen Li,Yunfei Wang,Yixin Liu,Yuhan Liu,Liuyang Han,Yanru Chen,Juntian Qu,Puxiang Lai,Xiang Qian
Microchannel force sensors have good stretching characteristics, and have garnered a lot of interest in the research area of health monitoring and human movement identification. However, there are still existing a number of problems for such microchannel-based force sensors, such as costly and time-consuming manufacturing procedures, layer mechanical mismatches, and poor instability. Here, we propose a flexible microchannel-based PDMS-MWCNTs composite sensor with high sensitivity and directional stretching response. MWCNTs are inserted into microchannels using the self-diffusion approach, and a unique encapsulating process has been demonstrated that combines MWCNTs with PDMS to create a composite that maximizes interlayer mechanical compatibility. When compared to traditional encapsulation techniques, the novel encapsulating approach tenfold boosts the sensors’ sensitivity within the same pressure detection range. In the range of 0-100 kPa, the sensitivity is up to 0.0433 kPa
-1
, detecting pressures as low as 11.9 pa, while the gauge factor is as high as 18.1. The results demonstrate that the proposed microchannel force sensor has significant promise for the future in the field of motion detection, health monitoring, etc.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2020
·
IF 4.608
Tingrui Xu,Xuejiao Li,Lili Guo,Feng Wang,Zhongfeng Tang
First principle molecular dynamics (FPMD) simulations in combination with experimental measurements are applied to investigate the phase transition behavior of NaCl-MgCl 2 eutectic salt from 823 to 573 K. First, the essential phase transition indexes of thermal expansion coefficient, density, melting point, and enthalpy of fusion for NaCl-MgCl 2 eutectic obtained by simulations and experiments are in good agreement with each other. Second, the micro-structural characteristics during phase transition are depicted by the temperature dependences of angular distribution function, radial distribution function and coordination number. The structural evolution of NaCl-MgCl 2 eutectic is illustrated from the rearrangement of polyhedral M g C l n 2 - n clusters, and it is founded that high and low temperature are conducive to the formation of 4-fold and 6-fold coordinated structure, respectively. Third, the ionic self-diffusion coefficients for NaCl-MgCl 2 eutectic are predicted and concluded that Mg 2+ behaves like a complex than as a free ion resulting in less diffusivity. Therefore, the shear viscosities of molten NaCl-MgCl 2 as well as the corresponding pre-exponential factor and activation energy are evaluated considering the solvodynamic mean radius of all the diffusive particles. Ultimately, two figures of merit for molten NaCl-MgCl 2 are deduced to evaluate the heat-transfer and heat-loss performance by integrating multiple thermal properties including density, viscosity, specific heat capacity and thermal conductivity. Overall, these simulation results are in satisfactory agreement with available reference data, indicating that the FPMD simulations work extremely well in predicting the thermophysical and structural properties of NaCl-MgCl 2 , which also provide insights for the applications of binary chloride salts in thermal energy storage.
研究领域:
材料科学
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Yi Xing,Mengyun Zhou,Xiangmei Liu,Minghang Qiao,Liping Zhou,Tailin Xu,Xueji Zhang,Xin Du
Chemodynamic therapy (CDT), which catalyzes the production of highly toxic reactive oxygen species (ROS), has been widely used in tumor therapy in the past five years. However, most of the current nanomaterials for CDT are difficult to penetrate into the tumor effectively due to the lack of motility, resulting in an unsatisfactory CDT effect. Herein, bioinspired jellyfish-like carbon/manganese nanomotors (JCMNs) are designed to achieve hydrogen peroxide (H 2 O 2 ) and NIR light dual-propulsion for the enhanced CDT therapy. Based on the jellyfish-like asymmetric structure, the manganese component can catalyze H 2 O 2 to generate chemical concentration gradient, propelling JCMNs to dynamically generate ROS in cells by self-diffusiophoresis. In addition, the carbon component of JCMNs can absorb near-infrared (NIR) light to produce a temperature gradient, driving JCMNs to enhance tumor penetration by self-thermophoresis. The combination of chemical and NIR light propulsions significantly improves the efficiency of tumor CDT, revealing that it should be a reasonable strategy to promote the development of nanobiomedicine by endowing nanosystems with propulsion capacity.
研究领域:
纳米技术
·
生物医学工程
·
癌症治疗
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shuai Yang,Qiang He,Xiankun Lin
Inspired by the chemotaxis of natural organisms that responds to environmental stimuli, chemotactic micro-/nanomotors have been developed toward a certain chemotactic cue. However, the chemotaxis of nanomotors towards the complex environment with multiple chemical gradients is highly desired. Here, we report a glucose-powered Janus mesoporous silica nanomotor exhibiting positive, chemotactic behavior toward regions rich in glucose and low pH. The nanomotors are prepared through partially coating gold onto mesoporous silica nanoparticles and then immobilizing glucose oxidase (GOx) onto the gold patch. Due to the enzymatic catalytic decomposition, the nanomotors propelled by self-diffusiophoresis exhibit the motion behaviors dependent on the glucose concentration and pH. The translation diffusion coefficient of the nanomotors is enhanced with increasing the glucose concentration. The translation diffusion coefficient reaches the maximum value at pH 5.5 when adjusting the pH of the glucose solution. In the presence of either the concentration gradient of glucose or the gradient of pH or both, the nanomotors exhibit positive chemotactic behaviors. This result indicates that multiple chemotaxis can be involved when enzyme-powered nanomotors move towards a complex environment, which will enhance the design of nanomotors for the advanced applications such as actively targeted drug delivery.
研究领域:
纳米技术
·
化学工程
·
生物物理学
·
材料科学
·
酶催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2023
·
IF 6
Zihao Su,Xingyi Liu,Jiafu Xing,Yuyang Jiao,Zhaoyou Zhu,Jianguang Qi,Yinglong Wang
Pharmaceutical production processes produce ester-containing wastewater, and the concentration of esters must be reduced to a specific limit for wastewater discharge. Therefore, this study investigated a synthetic menthol eutectic solvent to separate the ester-water mixture and meet industrial discharge standards. A deep eutectic solvent (DES) composed of menthol as the hydrogen bond acceptor and lauric acid as the hydrogen bond donor in a molar ratio of 2:1 was synthesized to study the liquid–liquid extraction experiment by separating mixtures of water and propyl acetate (PA) and water and butyl acetate (BA) at 1 atm. In addition, a temperature range of 273.15–318.15 K was used to measure the influence of temperature on the experimental results within a 5 K interval. The experimental results indicated that the increase in temperature promoted the extraction efficiency of ester to some extent, but the fluctuation range was unclear. The DES had a high distribution coefficient ( β ) and selectivity ( S ) for ester, enabling a better separation of ester and water. Thereafter, molecular dynamics (MD) simulations were performed to ascertain the mechanism of the DES extraction of esters, and the molecular simulations were used to calculate the interaction energy, radial distribution function (RDF), spatial distribution function (SDF), and self-diffusion coefficient ( D ). The results of the MD simulations illustrated that menthol played an important role in the extraction process, and the hydrogen bond force between menthol and ester was the main force in the extraction process. Both BA and PA were effectively removed from the water by the DES. In general, the excellent extraction ability of the DES for esters was verified by experiments and simulation, which provides solid theoretical support for ester separations in other fields.
研究领域:
环境科学
·
化学工程
·
分子动力学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Tianyi Liu,Miao Yan,Shan Zhou,Qirui Liang,Yanjun He,Xin Zhang,Hui Zeng,Jian Liu,Biao Kong
Micro-/nanomotors with advanced motion manipulation have recently received mounting interest; however, research focusing on the motion regulation strategies is still limited, as the simple construction and composition of micro-/nanomotors restrict the functionality. Herein, a multifunctional TiO2-SiO2-mesoporous carbon nanomotor is synthesized via an interfacial superassembly strategy. This nanomotor shows an asymmetric matchstick-like structure, with a head composed of TiO2 and a tail composed of SiO2. Mesoporous carbon is selectively grown on the surface of TiO2 through surface-charge-mediated assembly. The spatially anisotropic distribution of the photocatalytic TiO2 domain and photothermal carbon domain enables multichannel control of the motion, where the speed can be regulated by energy input and the directionality can be regulated by wavelength. Upon UV irradiation, the nanomotor exhibits a head-leading self-diffusiophoretic motion, while upon NIR irradiation, the nanomotor exhibits a tail-leading self-thermophoretic motion. As a proof-of-concept, this mechanism-switchable nanomotor is employed in wavelength-regulated targeted cargo delivery on a microfluidic chip. From an applied point of view, this nanomotor holds potential in biomedical applications such as active drug delivery and phototherapy. From a fundamental point of view, this research can provide insight into the relationship between the nanostructures, propulsion mechanisms, and motion performance.
研究领域:
纳米技术
·
材料科学
·
生物医学工程
·
光子学
✓ 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）