Nature Communications
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2024
·Vol. 15
·期 1
·1-13
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IF 14.7
Zhang Lei,Chen Lu,Wang Siheng,Wang Shanshan,Wang Dan,Yu Le,Xu Xu,Liu He,Chen Chaoji
Self-powered skin attachable and detachable electronics are under intense development to enable the internet of everything and everyone in new and useful ways. Existing on-demand separation strategies rely on complicated pretreatments and physical properties of the adherends, achieving detachable-on-demand in a facile, rapid, and universal way remains challenging. To overcome this challenge, an ingenious cellulose nanofiber-mediated manifold dynamic synergy strategy is developed to construct a supramolecular hydrogel with both reversible tough adhesion and easy photodetachment. The cellulose nanofiber-reinforced network and the coordination between Fe ions and polymer chains endow the dynamic reconfiguration of supramolecular networks and the adhesion behavior of the hydrogel. This strategy enables the simple and rapid fabrication of strong yet reversible hydrogels with tunable toughness ((Value max -Value min )/Value max of up to 86%), on-demand adhesion energy ((Value max -Value min )/Value max of up to 93%), and stable conductivity up to 12 mS cm −1 . We further extend this strategy to fabricate different cellulose nanofiber/Fe 3+ -based hydrogels from various biomacromolecules and petroleum polymers, and shed light on exploration of fundamental dynamic supramolecular network reconfiguration. Simultaneously, we prepare an adhesive-detachable triboelectric nanogenerator as a human-machine interface for a self-powered wireless monitoring system based on this strategy, which can acquire the real-time, self-powered monitoring, and wireless whole-body movement signal, opening up possibilities for diversifying potential applications in electronic skins and intelligent devices.
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Mimi Han,Wenhao Shen,Xin Tong,Jean-Pierre Corriou
Two-dimensional (2D) MXene provides large surface area for the adsorption and interaction of H 2 O molecules, which is highly desirable for the construction of humidity-sensing materials. However, the drawbacks, involving easy stacking and poor mechanical strength, pose a huge challenge to its practical application. Herein, inspired by nacred “brick-mortar” nanostructure , a nanopaper humidity sensor made of flexible TEMPO-oxidated cellulose nanofibers/MXene/silver nanowires (TOCNFs/MXene/AgNWs) was developed by vacuum-assisted filtration self-assembly strategy. The synergism of 1D TOCNFs, AgNWs “mortar” and 2D MXene “bricks” endows the nanopaper with superb tensile strength (146.3 MPa), modulus (16.9 GPa), and superior bending durability, and the obtained TOCNFs/MXene/AgNWs nanopaper humidity sensor exhibits high response value of 90% at 97% RH with a low MXene addition of 20 wt%. Furthermore, the unique photothermal response property of MXene accelerates the desorption of H 2 O molecules during sensor recovery, realizing the reversible sensing performance. The proposed humidity sensing mechanism lies in the variation of MXene interlayer d-spacing induced by adsorbing ambient H 2 O molecules and the swelling of TOCNFs. Lastly, the sensor demonstrates the possibilities in human respiration monitoring, non-contact sensing, and humidity actuating.
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CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Hui Liu,Yi Lu,Bitao Peng,Jingxian Wei,Hongli Dai,Lei Wang,Hongxiang Zhu,Hui He
Materials capable of multiple encryption, color-changing visualizations, and time-dependent functionalities are ideal for efficient and secure information storage and transmission. In this study, a time-dependent self-erasing material (TDSEM) containing urease developed through the in-situ synthesis of gold nanoclusters on the surface of cellulose nanocrystal (CNC) chemically bonding fluorescein isothiocyanate. CNC not only played an important role as a long-term stabilizer for the material, but also acted as a bridge facilitating the assembly of organic and inorganic interfaces, enabling the integrated system to achieve multi-color regulation and fluorescence resonance energy transfer. The TDSEM demonstrated excellent pH responsiveness, cyclic stability, and durability. The information was encoded by directly introducing HCl/urea into the TDSEM, and automatically erased over time. Additionally, the fluorescence intensity and color (transitioning from red to orange to green) were modulated over a time scale by adjusting the urea concentration, thus precisely controlling the time to retrieve the correct information (22 min). The confidentiality of the encoded information was enhanced by dual “locking” of time and color, ensuring that decryption only occurred “time color key”. This time-dependent and color-varying dual functions provide valuable insights for the development of advanced information encryption and anti-counterfeiting technologies.
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APPLIED ORGANOMETALLIC CHEMISTRY
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2024
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IF 3.7
Lifei Liu,Xiaoqing Yang,Pengfei Li,Luyuan Zhang,Yali Luo,Meng Yan,Yang Deng,Xia An,Jianling Zhang,Xu Wu
The construction of metal–organic frameworks (MOFs) with desirable structures for high-performance photocatalysis is attractive but remains challenging. Here, a hierarchically meso- and microporous sc Cu-MOF-74 was synthesized in supercritical CO 2 ( sc CO 2 )/methanol solution. Compared with the conventional microporous Cu-MOF-74, the meso- and microporous sc Cu-MOF-74 has more exposed and accessible Lewis acid sites derived from the missing-linker defects. The unique structure endows sc Cu-MOF-74 with superior molecular accessibility, enhanced separation, and transfer efficiency of photogenerated charges. High catalytic activity and reusability can be achieved in photo-oxidative coupling of amines, reaching a maximum N-benzylbenzaldimine yield rate of 4.80 mmol g −1 h −1 under mild conditions, that is, air atmosphere and room temperature. This study provides a new idea for improving the intrinsic photocatalytic activities of MOFs.
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COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
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IF 8.1
Jingren Ma,Chunxiao Zheng,Ya Lu,Yiying Yue,Weisheng Yang,Changtong Mei,Xinwu Xu,Huining Xiao,Jingquan Han
Conductive hydrogels are ideal candidates for wearable strain sensors due to their intrinsic stretchability and conductivity. However, it’s still a challenge to fabricate a conductive hydrogel with a combination performance of high mechanical strength, self-adhesion, sensitivity, self-recovery capability, fatigue-resistant ability and biocompatibility. Herein, a dual-network hydrogel (TG/P-LP) composed of 2,2,6,6-tetra-methylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOCNs) supported graphene (GN), Laponite-oxidized polydopamine (LP) and polyacrylic acid-co-poly acrylamide (P) hydrogel matrix was synthesized via a facile in-situ radical polymerization process. The optimized biocompatible TG/P-LP hydrogel exhibits a high mechanical strength, self-adhesive performance, intrinsic self-recovery capability (95.7 % in 60 min) and anti-fatigue property. The hydrogel-based strain sensor exhibits a wide strain range (0 ∼ 600 %) and a high sensitivity ( GF = 12). This work designs a novel hydrogel-based sensor with excellent mechanical properties, long-term fatigue resistance, high strain sensitivity and wearability, demonstrating enormous potential in the applications of human motion detection and human–machine interaction.
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Advanced Science
·
2025
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IF 14.1
Siying Tao,Yingming Yang,Chenzhou Wu,Jiaojiao Yang,Ziyou Wang,Fangjie Zhou,Kunneng Liang,Yi Deng,Jianshu Li,Jiyao Li
Chronic infectious bone destruction diseases, such as periodontitis, pose a significant global health challenge. Repairing the bone loss caused by these chronic infections remains challenging. In addition to pathogen removal, regulating host immunity is imperative. The retention of neutrophil extracellular traps (NETs) in chronic infectious niches is found to be a barrier to inflammation resolution. However, whether ruining the existing NETs within the local infectious bone lesions can contribute to inflammation resolve and bone repair remains understudied. Herein, a nanocapsuled delivery system that scavenges NETs dual-responsively to near-infrared light as a switch and to NETs themselves as a microenvironment sensor is designed. Besides, the photothermal and photodynamic effects endow the nanocapsules with antibacterial properties. Together with the ability to clear NETs, these features facilitate the restoration of the normal host response. The immunocorrective properties and inherent pro-osteogenic effects finally promote local bone repair. Together, the NET scavenging nanocapsules address the challenge of impaired bone repair in chronic infections due to biased host response caused by excessive NETs. This study provides new concepts and strategies for repairing bone destruction attributable to chronic infections via correcting biased host responses in chronic infectious diseases.
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CARBOHYDRATE POLYMERS
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2024
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IF 10.7
Chenyu Sang,Shaowei Wang,Xiaoyue Jin,Xiaoyu Cheng,Huining Xiao,Yiying Yue,Jingquan Han
The rapid development of hydrogels has garnered significant attention in health monitoring and human motion sensing. However, the synthesis of multifunctional conductive hydrogels with excellent strain/pressure sensing and photoresponsiveness remains a challenge. Herein, the conductive hydrogels (BPTP) with excellent mechanical properties, fatigue resistance and photoresponsive behavior composed of polyacrylamide (PAM) matrix, 2,2,6,6-tetramethylpiperidin-1-yloxy-oxidized cellulose nanofibers (TOCNs) reinforcement and polydopamine-modified black phosphorus (BP@PDA) photosensitizer are prepared through a facile free-radical polymerization approach. The PDA adhered to the BP surface by π-π stacking promotes the optical properties of BP while also preventing BP oxidation from water. Through hydrogen bonding interactions, TOCNs improve the homogeneous dispersion of BP@PDA nanosheets and the mechanical toughness of BPTP. Benefiting from the synergistic effect of PDA and TOCNs, the conductive BPTP integrates superior mechanical performances, excellent photoelectric response and photothermal conversion capability. The BPTP-based sensor with high cycling stability demonstrates superior strain sensitivity ( GF = 6.0) and pressure sensing capability ( S = 0.13 kPa −1 ) to monitor various human activities. Therefore, this work delivers an alternative construction strategy for generating high-performance conductive hydrogels as multifunctional wearable sensors.
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CARBOHYDRATE POLYMERS
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2024
·
IF 10.7
Yuanyuan Ma,Ya Lu,Yiying Yue,Shuijian He,Shaohua Jiang,Changtong Mei,Xinwu Xu,Qinglin Wu,Huining Xiao,Jingquan Han
Inspired by creatures, abundant stimulus-responsive hydrogel actuators with diverse functionalities have been manufactured for applications in soft robotics. However, constructing a shape memory and self-sensing bilayer hydrogel actuator with high mechanical strength and strong interfacial bonding still remains a challenge. Herein, a novel bilayer hydrogel with a stimulus-responsive TEMPO-oxidized cellulose nanofibers/poly(N-isopropylacrylamide) (TOCN/PNIPAM) layer and a non-responsive TOCN/polyacrylamide (TOCN/PAM) layer is proposed as a thermosensitive actuator. TOCNs as a nano-reinforced phase provide a high mechanical strength and endow the hydrogel actuator with a strong interfacial bonding. Due to the incorporation of TOCNs, the TOCN/PNIPAM hydrogel exhibits a high compressive strength (~89.2 kPa), elongation at break (~170.7 %) and tensile strength (~24.0 kPa). The prepared PNIPAM/TOCN/PAM hydrogel actuator performs the roles of an encapsulation, jack, temperature-controlled fluid valve and temperature-control manipulator. The incorporation of Fe 3+ further endows the bilayer hydrogel actuator with a synergistic performance of shape memory and temperature-driven, which can be used as a temperature-responsive switch to detect ambient temperature. The PNIPAM/TOCN/PAM-Fe 3+ conductive hydrogel can be assembled into a flexible sensor and generate sensing signals when driven by temperature changes to achieve real-time feedback. This research may lead to new insights into the design and manufacturing of intelligent flexible soft robots.
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CELLULOSE
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2025
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IF 4.8
Wu Zhongbo,Shi Zhuqun,Xiong Chuanxi,Yang Quanling
The limited energy storage density which is ascribed to low dielectric constant impedes the more diversified applications of polymer dielectric capacitors, and the environmental pollution problem caused by petroleum-based polymers cannot be ignored. Cellulose has the characteristics of wide source, low cost, and strong polarization generated by the hydroxy groups on the molecular chain giving it a high dielectric constant. In addition, nanocellulose has excellent mechanical properties that enable it to be fabricated into homogeneous films with high tensile strength. In this work, barium titanate nanoparticles (BTNPs) were incorporated into nanocellulose films to obtain enhanced dielectric performance. The composite film has the best comprehensive performance with BTNP content of 0.9 wt.%, resulting in a discharge energy density of 5.21 J cm −3 and charge/discharge efficiency of 77.7% at 350 MV m −1 . Consequently, nanocellulose-based dielectric materials give great promise for applications in biopolymer-based dielectric capacitors. Graphical abstract
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Jialu Ji,Qi Zhang,Hesu Mo,Zhongfei Ren,Yan Lin,Zhigang Chen,Tiina Leiviskä,Zhengying Wu
Nanosized bimetallic oxides can efficiently activate peroxymonosulfate (PMS) to degrade organic pollutants attributed to their synergetic electron transfer between the two metals. However, their scalable and controllable synthesis remains challenging. In this study, small and regular MnCo 2 O 4 nanoparticles (NPs) were successfully synthesized via a facile bio-templating method. Leaf cells were used as structure-directing agents, and the nucleation and growth of MnCo 2 O 4 were restricted in the confined space of cells, resulting in MnCo 2 O 4 spinel with an average size of 22 nm. The MnCo 2 O 4 NPs can activate PMS to achieve 99 % degradation of TC ( C 0 = 20 mg·L −1 ) within 10 min. Moreover, the MnCo 2 O 4 NPs also show a wide applicable pH range (3.0 − 11.0, RE > 94 %), excellent reusability ( RE = 96 % after four cycles), and good adaptability in the complex water matrix. Analysis of the catalytic mechanisms suggests that radical O 2 •− and non-radical 1 O 2 dominate this MnCo 2 O 4 + PMS + TC system. Besides, 17 major degradation intermediates of TC were identified (most of them were predicted to be harmless), and 3 possible degradation pathways were proposed. This study provides a feasible strategy for synthesizing spinel-structured MnCo 2 O 4 NPs, which show great potential in removing antibiotics from wastewater.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Shujie Zhou,Ningning Song,Tianye Wang,Guangfeng Wu
Photocatalysis is limited by the high recombination rate of photogenerated e - and h + , but the piezoelectric effect can enhance the separation efficiency of charge carriers, so that the combining piezoelectric catalysis with photocatalysis is a highly promising approach for improving catalytic performance. In this study, aim to enhance piezo-photocatalytic performance, plasma treatment was applied to modify the surface of Bi 2 WO 6 to form oxygen vacancies . After plasma treatment, Bi 2 WO 6 exhibited a larger specific surface area, thinner thickness, narrower band gap, etc. These improvements have been confirmed to enhance the piezoelectric response of Bi 2 WO 6 , facilitate band bending and further improve the absorption of visible light , accelerate the separation of charge carriers, thus enhanced the piezo-photocatalytic activity. Consequently, utilization of plasma treatment had improved greatly the piezo-photocatalytic performance of Bi 2 WO 6 for the degradation of tetracycline hydrochloride . Impressively, plasma treatment promoted the generation of 1 O 2 during the piezo-photocatalytic reaction, emphasizing the advantages of utilizing plasma treatment for improving the performance of piezo-photocatalysts. This work highlights the use of plasma treatment to increase active sites and induce vacancy defects on the surface of catalysts, which exhibit excellent piezo-photocatalytic degradation performance and show great potential in the field of environmental remediation.
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ENVIRONMENTAL RESEARCH
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2024
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IF 7.7
Ziqi Wang,Yingyue Huang,Miao Yu,Wei Zhuang,Minghao Sui
Antimicrobial resistance (AMR) poses a global health threat to aquatic environments and its propagation is a hot topic. Therefore, deactivating antibiotic-resistant bacteria (ARB) and removing antibiotic resistance genes (ARGs) from water is crucial for controlling AMR transmission. Peracetic acid (PAA), which is known for its potent oxidizing properties and limited by-product formation, is emerging as a favorable disinfectant for water treatment. In this study, we aimed to assess the efficacy of pre-exposure to PAA followed by UV treatment (PAA-UV/PAA) compared with the simultaneous application of UV and PAA (UV/PAA). The focus was on deactivating vancomycin-resistant Enterococcus faecalis (VRE fs ), a typical ARB in water. Pre-exposure to PAA significantly enhanced the efficacy of subsequent UV/PAA treatment. At a UV fluence of 7.2 mJ cm −2 , the PAA-UV/PAA method achieved a 6.21 log reduction in VRE fs , surpassing the 1.29 log reduction observed with UV/PAA. Moreover, compared to UV/PAA, PAA-UV/PAA showed increased efficacy with longer pre-exposure times and higher PAA concentrations, maintaining superior performance across a broad pH range and in the presence of humic acid. Flow cytometry analysis indicated minimal cellular membrane damage using both methods. However, the assessments of superoxide dismutase (SOD) activity and adenosine triphosphate content revealed that PAA-UV/PAA induced greater oxidative stress under similar UV irradiation conditions, leading to slower bacterial regrowth. Specifically, SOD activity in PAA-UV/PAA surged to 3.06 times its baseline, exceeding the 1.73-fold increase under UV/PAA conditions. Additionally, pre-exposure to PAA amplified ARGs degradation and reduced resistance gene leakage, effectively mitigating the spread of AMR. Pre-exposure to 200 μM PAA for 10 and 20 min enhanced vanB gene removal efficiency by 0.14 log and 1.29 log, respectively. Our study provides a feasible approach for optimizing UV/PAA disinfection for efficient removal of ARB and ARGs.
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