INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Yajun Chen,Yi Hao,Lingling Feng,Jinmin Meng,Zhenming Yang,Huiying Wu,Peiying Li,Zhen Zhu,Bing Zhao,Qufu Wei
MXene-composited conductive hydrogels have received extensive attention in flexible, portable and self-powered wearable electronics based on triboelectric nanogenerators (TENGs). Yet, the incompatibility of the MXene with hydrogel matrix due to easy oxidation and weak interactions with polymer chains weakens the performance of hydrogels. Herein, inspired by the structure of leaves, tannic acid (TA) with abundant catechol groups was introduced to encapsulate MXene and TEMPO-oxidized cellulose nanofibers (TOCNF) was intercalated to support the MXene nanosheets as leaf vein, forming a stable TOCNF/TA@MXene nano-motif with three-dimensional (3D) network. Benefiting from the addition of TOCNF, TOCNF/TA@MXene exhibited long-term stability (>10 days) in aqueous environment with the presence of oxidant. Therefore, the obtained TOCNF/TA@MXene-composited hydrogel (PCM) exhibited high stretchability (>800 %), reliable fatigue resistance and good adhesiveness, which can be served as electrodes of flexible TENGs. The formed PCM-TENG demonstrated flexibility and versatility, achieving an open-circuit voltage of 106 V, a short-circuit current of ~2 μA and a transfer charge of ~31 nC even in a single-electrode mode. Besides, PCM-TENG showed enduring practicality and responsiveness as a self-powered sensor to detect human biomotions. PCM-TENG also presented desirable photothermal antibacterial capacity and cytocompatibility. All these properties endowed the PCM-TENG with great application potential in human healthcare.
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Science Advances
·
2024
·Vol. 10
·期 15
·
IF 11.7
Hanwen Guo,Xiaoying Chu,Yishun Guo,Jianhua Yang,Yingying Jin,Liyang Zhou,Yaou Peng,Qingying Wang,Fan Lu,Bailiang Wang
Contact lenses (CLs) are prone to adhesion and invasion by pollutants and pathogenic bacteria, leading to infection and inflammatory diseases. However, the functionalization of CL (biological functions such as anti-fouling, antibacterial, and anti-inflammatory) and maintaining its transparency still face great challenges. In this work, as a member of the MXenes family, vanadium carbide (V2C) is modified onto CL via a water transfer printing method after the formation of a tightly arranged uniform film at the water surface under the action of the Marangoni effect. The coating interface is stable owing to the electrostatic forces. The V2C-modified CL (V2C@CL) maintains optical clarity while providing good biocompatibility, strong antioxidant properties, and anti-inflammatory activities. In vitro antibacterial experiments indicate that V2C@CL shows excellent performance in bacterial anti-adhesion, sterilization, and anti-biofilm formation. Last, V2C@CL displays notable advantages of bacteria elimination and inflammation removal in infectious keratitis treatment.
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RARE METALS
·
2024
·
IF 9.6
Li Zhao-Yang,Zhao Wei-Jun,Sun Yu,Zhou Bing,Feng Yue-Zhan,Liu Chun-Tai
The pressing demand for ultrathin and flexible shields to counter electromagnetic interference (EMI) has sparked interest in Ti 3 C 2 T x MXene materials due to their exceptional electrical conductivity, tunable surface chemistry, and layered structure. However, pure Ti 3 C 2 T x MXene films often lack the mechanical properties required for practical engineering applications, and traditional reinforcement methods tend to reduce electrical conductivity. This work demonstrates an effective strategy to enhance the alignment and densely packed layered structure of Ti 3 C 2 T x MXene films by regulating the acidity and alkalinity of Ti 3 C 2 T x MXene aqueous solutions. This approach simultaneously improves mechanical strength and electromagnetic interference shielding effectiveness (EMI SE). Compared with original Ti 3 C 2 T x MXene films, MXene films modified with ammonia solution (NH 3 ·H 2 O) via OH − show a significant improvement in tensile strength (27.7 ± 1.9 MPa). Meanwhile, MXene films treated with hydrochloric acid (HCl) via H + reach an even higher tensile strength of 39 ± 1.5 MPa. Moreover, the EMI SE values of the treated MXene films increase significantly, each reaching 66.2 and 58.4 dB. The maximum improvements in EMI SE values for the acid- and alkali-treated samples are 17.9% and 4%, respectively. In conclusion, the simultaneous enhancement of mechanical strength and EMI shielding efficacy highlights the potential of acid- and alkali-treated Ti 3 C 2 T x MXene films for applications in ultrathin and flexible EMI shielding materials. Graphical abstract
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Xiaojing Su,Weihua Yang,Zhenhao Zhang,Lexi Deng,Kunquan Li,Huali Xie,Yunhui Wu,Xiaofan Zhang,Wenjian Wu
Wearable piezoresistive sensors have aroused considerable attention for their huge potential in emerging applications such as healthcare monitoring and intelligent electronics. However, the fabrication of piezoresistive sensors that combine excellent sensing performance with outstanding working reliability in watery environments still remains challenging. Herein, a superhydrophobic polyurethane (PU) sponge was proposed as a piezoresistive sensor through the synthesis of d-asparagine-modified MXene nanosheets (MXene-NH2) and coating of a conductive cross-linkable layer constructed by dihydroxyl-terminated poly(dimethylsiloxane) (PDMS(OH)) and MXene-NH2 nanosheets. The microscale sponge skeleton and nanoscale PDMS-MXene nanosheet wrinkles formed a hierarchically rough structure in support of superhydrophobicity with a water contact angle of 160°. Benefiting from the chemically cross-linkable network and strong adhesion of PDMS-MXene nanosheet coating, the obtained PDMS-MXene@PU sponge exhibited a robust water repellency with water contact angles (WCAs) larger than 150° after enduring chemical and physical damages. Owing to the synergistic effect of the production of microcrack junctions in the PDMS-MXene nanosheet layer and contact separation between conductive backbones, the PDMS-MXene@PU sensor was successfully applied in monitoring full-scale human motions (e.g., blowing, facial expression, finger and knee bending, etc.) with excellent sensing performances of the gauge factor reaching −1.9. The findings conceivably stand out as a methodology to fabricate robust superhydrophobic piezoresistive sensors with desirable sensing property for innovative and broad applications even under special working conditions.
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Materials Today Bio
·
2025
·
IF 10.2
Xue Ou,Zhijie Yu,Xi Zheng,Le Chen,Chuanyu Pan,Dandan Li,Zhenzhen Qiao,Xiaoyuan Zheng
Diabetic wounds are a major clinical challenge due to their chronic, non-healing nature, which significantly impacts patients' quality of life. Traditional treatments often fail to effectively promote wound healing, highlighting the need for new biomaterials. In this study, we developed a composite hydrogel (KC@PF@TA) that combines the photothermal and antibacterial properties of Ti₃C₂Tx-Ag (Titanium carbide-silver) with the regenerative effects of paeoniflorin (PF). The hydrogel was optimized by adjusting the composition, crosslinking density, and the incorporation of nanoparticles, which enhanced its mechanical strength, photothermal conversion efficiency, antibacterial properties, and biocompatibility. The optimized hydrogel demonstrated enhanced cell proliferation, migration, and robust photothermal and antibacterial properties in vitro. In a diabetic murine model of Staphylococcus aureus -infected wounds, KC@PF@TA exhibited exceptional therapeutic benefits in antibacterial, anti-inflammatory, angiogenic, and tissue regeneration. Overall, our results suggest that composite hydrogels with controlled bioactive agent release and mechanical modulation present a promising solution for treating chronic diabetic wounds.
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Nano-Micro Letters
·
2025
·
IF 36.3
Ruiqi Xu,Hongzhi Cui,Na Wei,Yang Yu,Lin Dai,Xiaohua Chen
Solar-driven interfacial evaporation is one of the most attractive approaches to addressing the global freshwater shortage. However, achieving an integrated high evaporation rate, salt harvesting, and multifunctionality in evaporator is still a crucial challenge. Here, a novel composite membrane with biomimetic micro-nanostructured superhydrophobic surface is designed via ultrafast laser etching technology. Attractively, the double‐transition‐metal (V 1/2 Mo 1/2 ) 2 CT x MXene nanomaterials as a photothermal layer, exhibiting the enhanced photothermal conversion performance due to elevated joint densities of states, which enables high populations of photoexcited carrier relaxation and heat release, provides a new insight into the photothermal conversion mechanism for multiple principal element MXene. Hence, the (V 1/2 Mo 1/2 ) 2 CT x MXene-200 composite membrane can achieve a high evaporation rate of 2.23 kg m −2 h −1 under one sun, owing to the enhanced “light trap” effect, photothermal conversion, and high-throughput water transfer. Synergetically, the membrane can induce the directed precipitation of salt at the membrane edge, thus enabling salt harvesting for recycling and zero-emission of brine water. Moreover, the composite membrane is endowed with excellent multifunctionality of anti‐/de‐icing, anti-fouling, and antibacterial, overcoming the disadvantage that versatility is difficult to be compatible. Therefore, the evaporator and the promising strategy hold great potential for the practical application of solar evaporation.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Li Zhang,Chao Li,Yue Chen,Shaobin Li,Xue Wang,Fengbo Li
L-tryptophan (L-Trp) is crucial for human metabolism, and its imbalance or deficiency can lead to certain diseases, such as insomnia, depression, and heart disease. Since the body cannot synthesize L-Trp and must obtain it from external sources, accurately monitoring L-Trp levels in food is essential. Herein, a nanocomposite film based on polyoxometalate (P 2 Mo 17 V), Ti 3 C 2 T x MXene , and chitosan (Cs) was developed through a green electrostatically mediated layer-by-layer self-assembly strategy for electrochemical detection of L-Trp. The composite film exhibits fast electron transfer and remarkable electrocatalytic performance for L-Trp with a wide linear range (0.1–103 μM), low limit of detection (0.08 μM, S/N = 3), good selectivity, reproducibility, and repeatability. In milk sample, the recoveries of L-Trp were from 95.78% and 104.31%. The P 2 Mo 17 V/Cs-Ti 3 C 2 T x electrochemical sensor not only provides exceptional recognition and detection capabilities for L-Trp but also shows significant potential for practical applications, particularly in food safety and quality control .
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JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Haseebul Hassan,Khakemin Khan,Sidra Mumtaz,Arslan Ahmed Rafi,Ahmed Mahmoud Idris,Ahmed Althobaiti,Alsharef Mohammad
Supercapacitors represent a promising avenue for advanced energy storage solutions. However, achieving devices that simultaneously possess all the ideal properties, such as high capacitance, fast charge-discharge rates, and excellent cyclability, remains a significant challenge. Herein, a facile approach for fabricating carbon aerogel-induced chromium metal-organic framework (CA@MIL-101) integrated with titanium carbide MXene (CA@MIL-101-(Cr)/Ti 3 C 2 T x ) nanocomposites was demonstrated via hydrothermal method. The CA@MIL-101-(Cr)/Ti 3 C 2 T x nanocomposites offer numerous divalent ion active sites and significantly improve charge transfer kinetics, attributed to their interconnected porous structure. This novel anode exhibits an outstanding specific capacity of 1632 Cg -1 with a PVDF binder-based electrode and a high rate of performance. Moreover, a full-cell supercapacitor was developed with carbon aerogel as the cathode and CA@MIL-101 (Cr)/Ti 3 C 2 T x as the anode. With its hierarchical pore structure and functional groups, the CA@MIL-101 (Cr)/Ti 3 C 2 T x anode achieves an energy density of 38 Wh-kg −1 , a high-power density of 1280 W-kg −1 , and robust anti-self-discharge behavior. The CA@MIL-101 (Cr)/Ti 3 C 2 T x //CA supercapattery uses both adsorption/desorption processes and faradaic reactions for charge storage. The synthesized materials also perform exceptionally well electro-catalytically. This research advances high-performance CA@MIL-101 (Cr)/Ti 3 C 2 T x electrodes, enhances understanding of supercapacitor charge storage, and paves the way for next-generation energy storage technologies.
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Nano Materials Science
·
2024
·
IF 12.6
Wenting Tao,Wenqin Shao,Meng Ma,Si Chen,Yanqin Shi,Huiwen He,Yulu Zhu,Xu Wang
The increasingly serious electromagnetic (EM) radiation and related pollution effects have gradually attracted people's attention in the information age. Hence, it's crucial to develop adaptive shielding materials with minimum EM waves (EMW) reflection. In this paper, Ag nanoparticles loaded mesoporous carbon hollow spheres (MCHS@Ag) were synthesized by chemical reduction method, and cellulose nanofibers (CNF)/MXene/MCHS@Ag homogeneous composites were prepared. The total EM interference shielding efficiency (SE T ) of CNF/MXene/MCHS@Ag composite film was 32.83 dB (at 12.4 GHz), and the absorption effectiveness (SE A ) was improved to 26.6 dB, which was 63.1% and 195.5% higher than that of CNF/MXene/MCHS composite film. The low dielectric property of MCHS effectively optimized the impedance matching between the composites and air. The hollow porous structure prolonged the transmission path of EMW and increased the absorption loss of the composites. At the same time, Ag nanoparticles located the MCHS were helpful to construct the internal conductive path overcoming the damage of the conductive property caused by the low dielectric of MCHS. This research adopts a straightforward method to construct a lightweight, pliable, and mesoporous composites for EMI shielding, which serves a crucial role in the current era of severe EM pollution.
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Journal of Food Measurement and Characterization
·
2024
·
IF 2.9
Liao Diyan,Zhao Yong,Zhou Yi,Yi Yinhui,Weng Wenchuan,Zhu Gangbing
The extensive usage of organophosphate pesticides (OPs) has posed severe harm to human health and environmental system, but achieving highly effective and on-site detection is still a great challenge. In this work, a novel nanozyme Nb 2 CT x MXene/bimetallic PdPt (Nb 2 CT x @PdPt) was synthesized firstly through a simple self-reduction method, and the results show that the as-prepared Nb 2 CT x @PdPt nanozyme exhibits outstanding peroxidase-like activity. Interestingly, the nanozyme activity of Nb 2 CT x @PdPt is restrained remarkably in the presence of acetylcholine chloride and acetylcholinesterase while it can be restored through the addition of OPs (selecting glyphosate as a model). Based on this phenomenon, a sensitive colorimetric assay coupled with hydrogel and smartphone for OPs was then constructed. After optimizing various conditions, the designed sensing platform can achieve stable, rapid, and sensitive on-site detection for OPs, showing superior sensing performances: a wide linearity of 1.0 ng mL −1 –1.0 µg mL −1 and low detection limit of 0.419 ng mL −1 .
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Science China-Materials
·
2024
·Vol. 67
·期 7
·2246-2255
·
IF 6.8
Dai Yan,Chen Gengxu,Huang Weilong,Xu Chenhui,Liu Changfei,Huang Ziyu,Guo Tailiang,Chen Huipeng
Artificial photonic synapses offer an efficient solution for overcoming the von Neumann bottleneck in data storage and processing, providing advantages over electrical synapses by eliminating the bandwidth-connection-density tradeoff and exhibiting low power consumption. Perovskite quantum dots (QDs) have garnered significant attention in artificial photonic synapses due to their facile synthesis and favorable optoelectronic properties. However, challenges such as limited carrier mobility and nonlinearity impede their performance in neuromorphic applications. In this study, CsPbBr 3 -attached MXene nanostructures (CsPbBr 3 -MXene), in-situ growth of CsPbBr 3 QDs on MXene nanosheets, were proposed as the light-absorbing layer of a synaptic phototransistor. The heterostructure formed by CsPbBr 3 and MXene enhances photocurrent generation. Comparative analyses between CsPbBr 3 -MXene synapse transistor and that containing only CsPbBr 3 revealed a 24.6% higher excitatory postsynaptic current (EPSC) in the CsPbBr 3 -MXene one under identical light pulse stimulation. Following calculations and comparisons, the linearity exhibited significant improvement, decreasing from 4.586 to 1.099. Furthermore, the recognition accuracy in handwritten digit classification notably increased, rising from 86.13% to 92.05%. Moreover, the F1 score in edge detection had improvement, advancing from 0.8165 to 0.9065, approaching closer to 1. These improvements have demonstrated substantial assistance in the field of neural computing.
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Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-16
·
IF 36.3
Zhou Yang,Zhang Wen,Pan Dong,Li Zhaoyang,Zhou Bing,Huang Ming,Mi Liwei,Liu Chuntai,Feng Yuezhan,Shen Changyu
The morphological distribution of absorbent in composites is equally important with absorbents for the overall electromagnetic properties, but it is often ignored. Herein, a comprehensive consideration including electromagnetic component regulation, layered arrangement structure, and gradient concentration distribution was used to optimize impedance matching and enhance electromagnetic loss. On the microscale, the incorporation of magnetic Ni nanoparticles into MXene nanosheets (Ni@MXene) endows suitable intrinsic permittivity and permeability. On the macroscale, the layered arrangement of Ni@MXene increases the effective interaction area with electromagnetic waves, inducing multiple reflection/scattering effects. On this basis, according to the analysis of absorption, reflection, and transmission (A–R–T) power coefficients of layered composites, the gradient concentration distribution was constructed to realize the impedance matching at low-concentration surface layer, electromagnetic loss at middle concentration interlayer and microwave reflection at high-concentration bottom layer. Consequently, the layered gradient composite (LG5-10–15) achieves complete absorption coverage of X-band at thickness of 2.00–2.20 mm with RL min of −68.67 dB at 9.85 GHz in 2.05 mm, which is 199.0%, 12.6%, and 50.6% higher than non-layered, layered and layered descending gradient composites, respectively. Therefore, this work confirms the importance of layered gradient structure in improving absorption performance and broadens the design of high-performance microwave absorption materials.
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