Thermal Science and Engineering Progress
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2025
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IF 5.4
HaoMing Huang,Shan Qing,XiaoHui Zhang,ChengHang Li,Jing Zhang,Ying Zhang,Xi Wang
Nanofluids (NFs) are considered advanced heat transfer fluids due to their enhanced thermal conductivity, improved heat transfer efficiency, energy-saving potential, and prospects for system miniaturization. However, the development of NFs faces challenges, as traditional single-component NFs often suffer from poor stability, limited thermal conductivity improvement, and high viscosity, which hinder their practical application. Herein, we prepared multi-walled carbon nanotubes (MWCNTs)-TiO 2 /H 2 O NFs via a two-step method and investigated the regulatory effects of temperature (20 °C-80 °C) and mass ratio (10:1-1:10) on their dispersion stability, thermal conductivity, and viscosity characteristics. It turned out that MWCNTs and TiO 2 nanoparticles formed an interfacial coupling structure through physical adsorption. This structure was mediated by the preferential anchoring of TiO 2 nanoparticles onto the surface-active sites of MWCNTs, which effectively suppressed particle agglomeration and ensured dispersion stability of the MWCNTs-TiO 2 /H 2 O NFs. The MWCNTs-TiO 2 /H 2 O NFs with a mass ratio of 1:2 demonstrated optimal performance enhancement ratios (PER) by reducing viscosity loss and significantly improving thermal conductivity within the temperature range. Comparative studies with single-component NFs revealed that this hybrid NFs exhibited significant advantages in both thermal conductivity and viscosity performance, further confirming the synergistic optimization effect between the MWCNTs and TiO 2 nanoparticles. Our work reveals the core role of the interface coupling mechanism between MWCNTs and TiO 2 nanoparticles in optimizing the thermal transport performance of NFs, providing a theoretical basis for the development of efficient heat transfer systems based on synergistic effects.
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高影响因子
ACS Applied Materials & Interfaces
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2025
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IF 8.2
Xuecheng Yang,Xiaoyu Zhang,Ge Yu,Yubin Ma,Xin Li,Yiyang Guo,Shuping Wang,Dan Ge,Changying Xue,Kun Jin,Bingbing Sun
Amyloid-β (Aβ) fibrillation is a spontaneous, thermodynamic process governed by nucleation and elongation. While many studies have explored the ability of engineered nanomaterials (ENMs) to modulate Aβ fibrillation, such as inhibitors, promoters, and dual-modulators, the key physicochemical property of ENMs that determines this behavior remains unclear. In this study, we developed a comprehensive library of ENMs with well-controlled physicochemical properties, including surface charges, morphologies, and hydrophilicity, to systematically investigate their effects on Aβ40 fibrillation. We identified hydrophilicity as the primary determinant of ENM-mediated modulation, rather than surface charge or morphology. Thioflavin T (ThT) kinetics assays indicated that hydrophilic ENMs exhibited bidirectional modulation, both promoting and inhibiting fibrillation depending on concentration. This bidirectional effect results from a competition between accelerated nucleation and decelerated elongation. While hydrophobic ENMs exhibited only unidirectional inhibition from the initial nucleation phase, two-dimensional-NMR (2D-NMR) mechanism studies indicated that this difference resulted from specific interactions with Aβ40 residues. Hydrophilic ENMs targeted hydrophilic residues involved in elongation, including Arginine R5, Glycine G9, G25, G33, G37, and G38, Lysine K28, and Alanine A30, while hydrophobic ENMs bound to hydrophobic residues critical for nucleation, such as I31. These findings provide mechanistic insight into NP–peptide interactions and lay a foundation for the rational design of nanomaterials to modulate amyloid fibrillation.
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高影响因子
APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Xian Xie,Huxiao Xia,Changtao Wang,Xiong Tong,Chuandong Zhao
The entrainment of Mg-containing chlorite usually occurs during marmatite flotation, which further deteriorates the smelting of zinc concentrate. In this study, the flotation behavior of marmatite and chlorite were investigated, which disclosed that fine-grained chlorite was more floatable and easily entered into zinc concentrate than coarse-grained chlorite. The combined water glass (AWG) and sodium citrate (SC) has been confirmed excellent chlorite depressant, which could decrease the grade of MgO from 3.45 % to 0.31 % in zinc concentrate. XPS and reagent adsorption analysis uncovered that Cu 2+ would not adhere and induce collector ML-8 attach to chlorite surface, meaning the entrainment of chlorite was not caused by activation flotation. The moisture of foam for fine-grained chlorite flotation is much higher than of marmatite, confirming that foam for chlorite flotation is not mineralized, and the collection of chlorites was caused by foam entrainment. Moreover, AWG and SC could selectively adsorb on the chlorite surface and reduce its contact angle to 16.85°. Eventually, SEM-EDS detection further revealed that the entrainment of fine-grained chlorite in zinc concentrate was almost disappeared after using the combined AWG and SC to increase the surface wettability of chlorite. The actual ore flotation further confirmed its excellent inhibitory effect on selectivity.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2025
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IF 2.8
Ying Hu,Xin Wu,Lin Zhou,Yan Kou,Ming Huang,Mao Chen
Epoxy resin, as a widely utilized insulating material in the field of electronic device encapsulation, faces challenges in achieving nondestructive disassembly of end-of-life devices and material recycling due to its three-dimensional cross-linked network structure, despite providing excellent mechanical properties. Additionally, it lacks autonomous repair capabilities when subjected to mechanical damage. To address these critical industry challenges, this study introduces dynamic disulfide bonds into the epoxy potting system, designing an epoxy vitrimer material with topologically reconfigurable network capabilities. This approach offers a viable solution for advancing the sustainable development of electronic encapsulation materials. The experiment employed an epoxy monomer containing dynamic disulfide bonds and a trifunctional thiol curing agent to prepare epoxy vitrimer potting insulation materials via a one-pot thiol-epoxy click reaction. The synthesized vitrimer demonstrates outstanding thermal stability ( T d = 318°C), electrical breakdown strength ( E b = 27.09 kV/mm), rapid stress relaxation behavior ( τ = 39 s), and superior hydrophobicity (contact angle = 118°). Furthermore, the encapsulated electronic components function normally, while the material's dynamic properties enable nondestructive recycling of components, autonomous repair of mechanical damage, and shape memory characteristics. The material maintains robust stability even after multiple high-low temperature cycles.
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MATERIALS LETTERS
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2025
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IF 2.7
Ze Yin,Wenxu Tang,Ke Zhao,Binghao Chen,Jinggang Yang,Lei Sun,Shan Gao,Potao Sun
Microcracks and electrical treeing within polymer insulating materials are the primary causes of insulation failure. Early detection and repair of such damages are crucial. In this study, we leveraged the aggregation-induced emission (AIE) effect and a microcapsule self-healing system to design a UV-triggered smart insulating material capable of autonomous damage repair and self-reporting. The composite material demonstrated effective healing of both mechanical damage and electrical treeing channels, achieving damage-recovery rates of 91.67 % and 93.26 % for tensile strength and electrical strength, respectively. As the released healing agent was solidified within the damage path, it triggered intense AIE fluorescence, precisely indicating the location of damage.
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TALANTA
·
2025
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IF 6.1
Qiyu Zhang,Zhaoying Liu,Enze Sheng,Zhenjiang Liu,Rujin Zhao,Ming Li
To address the challenge of readily available and cost-effective monitoring, a novel aptasensor platform was proposed relying on the clustered regularly interspaced short palindromic repeats/associated protein 12a (CRISPR/Cas12a)-driven and glucosemeter-assisted system for zearalenone (ZEN). The magnetic bead (MB)-based probes of MB@Apt-cDNA and MB@invertase were prepared to provide specific recognition and efficient conversion. When ZEN presented, the released cDNA activated the cutting function of CRISPR/Cas12a for ssDNA, releasing numerous invertase to convert the environmentally friendly sucrose. Then, the generated glucose signals were positively related to ZEN levels, which quantified by a glucosemeter. The proposed aptasensor displayed an excellent sensitivity, achieving the limit of detection (LOD) and detection range of 0.218 ng/mL and 0.218−109.89 ng/mL, respectively. The platform also exhibited high specificity (with cross-reactivity values below 6.81 % for other analytes) and high accuracy for ZEN detection. The satisfactory reliability and practicability had been demonstrated through its application in real agricultural byproduct samples. The area under the curve was 0.979, with an optimal operating point being (0.125, 1.000). This study can provide an alternative pathway for improving the detection performance and accessibility to public in limited situation, suggesting the efficient CRISPR/Cas12a and green glucosemeter detection strategies for other pollutant monitoring.
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JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Dong Wentao,Zhang Mingguang,Peng Tao,Peng Yangyi,He Zanhua,Yao Daojin
With the rapid development of high-speed railway, real-time monitoring of operation safety becomes more and more crucial. However, power supply for microsensors in railway monitoring systems is still demanding and challenging. Stable energy to onboard sensing devices is essential to ensure the safe operation of rail transit systems. Herein, a hybrid piezoelectric–triboelectric nanogenerator (HPTG) is proposed to harvest the vibration energy on the bogie, which is also used as the self-powered sensing for continuous structural health monitoring (SHM) of train bogie. HPTG is designed and fabricated with polyvinylidene fluoride (PVDF)/zinc oxide (ZnO) composite and polydimethylsiloxane (PDMS) film. The experiment results demonstrate that incorporating ZnO simultaneously enhances piezoelectric and triboelectric outputs while improving the overall output performance of the device, fully realizing the synergistic effect of piezoelectric effect and triboelectric effect. Under the condition of external load, the maximum power of the hybrid output is 3.256 μW with excellent working stability. Through the integration of rectifier circuit and energy storage module, the microthermohygrometer is successfully driven. In addition, the feasibility of vibration energy harvesting of HPTG in the actual operating environment is further verified on the small-scale wheel rolling test bench, which provides a solution for the power supply problem of microelectronic equipment for train bogie monitoring, and can effectively help to develop the self-powered monitoring system of rail transit.
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LANGMUIR
·
2025
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IF 3.9
Zhenxin Yang,Fushun Li,Yuanju Zhao,Delong Yang,Juntao Hu,Tao Zhang,Deng-Ke Wang,Qiang Zhu,Zheng-Hong Lu
Organic field-effect transistors (OFETs) fabricated on SiO2/Si wafers represent a crucial avenue for the development of organic-on-silicon technology and serve as a platform for materials science to characterize carrier mobility. The surface cleaning treatment of wafers is critical because OFETs are highly sensitive to surface states. In this study, the effects of intrinsic organic contaminants on wafers, as well as the functions of commonly used cleaning solvents and treatments on the surface states, electronic structure of SiO2, and the performance of OFETs were systematically investigated. The intrinsic organic contaminants on the wafer surface were identified as being in positively charged states, which led to high operational voltages of OFETs and degraded bias-stress stability. However, their impact on field-effect mobility was found to be minimal following any surface cleaning process. The conventional ultrasonic cleaning using acetone and isopropanol only partially removed contaminants, which provides limited improvement in reducing operational voltages and enhancing bias-stress stability. The subsequent ultrasonic cleaning with deionized water and UV-ozone treatment further removed contaminants. More importantly, these processes anchor hydroxyl species on the SiO2 surface, which impart negative charges for the neutralization of surface charge states, thereby comprehensively enhancing operational performance of devices. By leveraging the distinct properties of various solvents and treatments, an optimized surface cleaning protocol was proposed, in which the threshold voltage of OFETs was reduced to nearly 0 V, and the bias-stress stability was enhanced by approximately 300%.
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ULTRASONICS SONOCHEMISTRY
·
2025
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IF 9.7
Longshi Rao,Shengxin Zhu,Jiaying Liu,Qiuling Bai,Junxian Zou,Chuheng Deng,Hongze Tu,Qingxian Liu,Guisheng Zhong,Xiaodong Niu,Jiasheng Li
Carbon dots (CDs) are promising fluorescent nanomaterials with broad applications in optoelectronics, healthcare, and artificial photosynthesis. However, synthesizing indigo-emitting CDs with optimal properties remains challenging due to the inefficiencies and complexity of conventional methods. This study introduces a high-performance ultrasonic microreactor inspired by biomimetic leaf vein structures to enhance CD synthesis efficiency. We developed a COMSOL Multiphysics-based optimization framework to improve flow field uniformity and examine transport dynamics within the microchannel. This framework identified key parameters, including leaf vein contours, fractal angles, depth-to-width ratios, and inlet configurations, that govern flow characteristics. Additionally, we optimized ultrasonic energy transfer by directly coupling the transducer with the microreactor, determining the optimal frequency (21 kHz) and power (100 W) for maximum reactor performance. Visualization experiments revealed how ultrasound regulates bubble dynamics, enhancing interfacial area and stabilizing suspension behavior. Using this optimized system, we synthesized indigo-emitting CDs with a maximum PLQY of 27.5 % and a narrow FWHM of ∼78 nm under 365 nm excitation. Multivariate experiments revealed how flow velocity, reaction temperature, and ultrasonic modulation influence the optical properties of the CDs. This work underscores the synergistic combination of ultrasonic energy, biomimetic design, and simulation-guided optimization, providing a solid foundation for scalable synthesis of carbon-based nanomaterials with applications in optoelectronics, healthcare, and beyond.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Yalin Zhang,Xiaoyue Li,Yanhui Duo,Xiaoyuan Liao,Zongzheng Yang
This study reported a modified hydrothermal solvent method for preparing lignin microspheres (LNSs) with controllable size and morphology by precisely regulating the reaction temperature (160–220 °C). Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM) were employed to evaluate the structure, morphological, and dimensional attributes of lignin microspheres, and the synthesis mechanism was discussed. The antibacterial efficacy of the hydrothermally treated lignin microspheres (HTLNSs) was evaluated through phosphate-buffered saline (PBS) culture assays, as well as by assessing nucleic acid and protein leakage, and their inhibitory effect on cell membrane permeability. Among the synthesized samples, HTLNS-180 demonstrated superior bacteriostatic properties, achieving the highest nucleic acid content and bacterial cell permeability post-treatment, suggesting significant bacterial cell wall disruption. Its antibacterial inhibition rate reached 51.0 % against Staphylococcus aureus ( S. aureus ) and 54.3 % against Escherichia coli ( E. coli ). The study provides new insights into the structure-property relationship of lignin-based nanomaterials and their potential in biomedical and antimicrobial applications.
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iEnergy
·
2025
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IF 5.1
Chaolu Niu,Wenxia Sima,Potao Sun,Qichang Liu,Tao Yuan,Ming Yang,Zheng Fang,Hefei Wang,Wenxu Tang,Jiameng Xu,Yuhang Yang,Yuxiang Mai,Binghao Chen
To address the inherent trade-off between mechanical strength and repair efficiency in conventional microcapsule-based self-healing technologies, this study presents an eggshell-inspired approach for fabricating high-load rigid porous microcapsules (HLRPMs) through subcritical water etching. By optimizing the subcritical water treatment parameters (OH− concentration: 0.031 mol/L, temperature: 240 °C, duration: 1.5 h), nanoscale through-holes were generated on hollow glass microspheres (shell thickness ∼ 700 nm). The subsequent gradient pressure infiltration of flaxseed oil enabled a record-high core content of 88.2%. Systematic investigations demonstrated that incorporating 3 wt% HLRPMs into epoxy resin composites preserved excellent dielectric properties (breakdown strength ≥ 30 kV/mm) and enhanced tensile strength by 7.52%. In addressing multimodal damage, the system achieved a 95.5% filling efficiency for mechanical scratches, a 97.0% reduction in frictional damage depth, and a 96.2% recovery of insulation following electrical treeing. This biomimetic microcapsule system concurrently improved self-healing capability and matrix performance, offering a promising strategy for the development of next-generation smart insulating materials.
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ACS Omega
·
2025
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IF 4.3
Peiying Han,Li jun Yang,Zhaofei Zhu,Xuyuan Liang,Wanxin Wu
The coffee-ring effect commonly occurs during the evaporation and deposition of particle-laden droplets on the substrates. The resulting deposition pattern is influenced by internal flows, which depend on substrate properties, droplet chemistry, and external conditions. However, in applications such as inkjet printing, drug formulation, and self-assembly, avoiding coffee ring formation is crucial. This study presents a method to suppress the coffee-ring effect using focused laser irradiation on droplet surfaces. By irradiating droplets containing silica microparticles with a green laser and adjusting the particle concentration, we controlled the deposition patterns. Uniform patterns formed at particle concentrations below 0.02%, while gradient patterns appeared above 0.08%. A dimensionless parameter, G, was introduced to quantify particle deposition patterns. Uniform deposition structures are established when Gmax > 10, whereas gradient structures are formed when Gmax < 2. This approach offers new insights into the laser-induced control of microparticle deposition patterns.
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