Materials
·
2024
·Vol. 17
·期 17
·4289
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IF 3.1
Xingda Liu,Jiawen Sun,Jizhou Duan,Kunyan Sui,Xiaofan Zhai,Xia Zhao
Biofouling poses a significant challenge to the marine industry, and silicone anti-biofouling coatings have garnered extensive attention owing to their environmental friendliness and low surface energy. However, their widespread application is hindered by their low substrate adhesion and weak static antifouling capabilities. In this study, a novel silicone polymer polydimethylsiloxane (PDMS)-based poly(urea-thiourea-imine) (PDMS-PUTI) was synthesized via stepwise reactions of aminopropyl-terminated polydimethylsiloxane (APT-PDMS) with isophorone diisocyanate (IPDI), isophthalaldehyde (IPAL), and carbon disulfide (CS2). Subsequently, a nanocomposite coating (AgNPs-x/PDMS-PUTI) was prepared by adding silver nanoparticles (AgNPs) to the polymer PDMS-PUTI. The dynamic multiple hydrogen bonds formed between urea and thiourea linkages, along with dynamic imine bonds in the polymer network, endowed the coating with outstanding self-healing properties, enabling complete scratch healing within 10 min at room temperature. Moreover, uniformly dispersed AgNPs not only reduced the surface energy of the coating but also significantly enhanced its antifouling performance. The antibacterial efficiency against common marine bacteriaPseudomonas aeruginosa(P.sp) andStaphylococcus aureus(S.sp) was reduced by 97.08% and 96.71%, respectively, whilst the diatom settlement density on the coating surface was as low as approximately 59 ± 3 diatom cells/mm2. This study presents a novel approach to developing high-performance silicone antifouling coatings.
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Advanced Materials Technologies
·
2024
·
IF 6.4
Sai Wang,Xunchang Yan,Tong Zhang,Lin Li,Ru Li,Seeram Ramakrishna,Yun-Ze Long,Wenpeng Han
Wearable multi-functional sensor with practical features is crucial for applications in many areas such as e-skin, health monitoring, and human-computer interaction. Herein, an all-nanofiber flexible breathable iontronic sensor based on polyacrylonitrile (PAN) nanofiber membrane doped with ionic liquid (IL) is prepared by electrospinning technique. Compared to the traditional capacitor's electrode-dielectric-electrode sandwich structure, an undoped PAN nanofiber membrane is added between the electrode and the dielectric layer as the spacer. The iontronic sensor demonstrated an impressive linear response in pressure ranges of 0–50 and 50–300 kPa, with linearity values of R 1 2 = 0.992, R 2 2 = 0.998 by adjusting the thickness of the spacer. Additionally, the iontronic sensor demonstrates excellent temperature response attributed to the thermal sensitivity of the IL. It exhibits high sensitivities of 8.5, 31.8, and 71.1% °C −1 , along with low detection limits of 0.5°C, across temperature ranges of 20–40, 40–55, and 55–80 °C, respectively. To validate the sensor for practical applications, its uses are demonstrated in various scenarios, such as body joint flexion, heartbeat monitoring, encrypted messaging, and temperature-sensitive gloves. This study enables the integration of pressure and temperature sensing functions to develop diverse and integrated designs for wearable electronic devices.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
·
IF 8.5
Haiyan Li,Zekun Jin,Nengguo Tao
This study aimed to develop food-grade ethyl cellulose/agarose aerogels for the controlled release of plant essential oils to extend the shelf life of fresh rice noodles. The antibacterial efficacy of ten unsaturated aldehyde essential oils was evaluated against primary spoilage bacteria, including Leuconostoc lactis , Lactococcus lactis , Acinetobacter johnsonii , Exiguobacterium indicum , and Enterobacter sichuanensis . Based on its superior antimicrobial performance, (E)-2-hexenal was selected for encapsulation within ethyl cellulose/agarose aerogels to achieve controlled release and extend the shelf life of fresh rice noodles. Increasing the ethyl cellulose concentration resulted in a more uniform pore size distribution, enhanced mechanical properties and hydrophobicity, and improved controlled release of (E)-2-hexenal in the aerogels. The optimized aerogel, loaded with 0.20 μL/mL of (E)-2-hexenal, exhibited significant antimicrobial activity, effectively inhibiting bacterial growth for 72 h. Moreover, the aerogel formulation effectively preserved the quality of fresh rice noodles by mitigating changes in total plate count, pH, water content, water activity, cooking properties, color, and texture, ultimately extending the product's shelf life by 4 days at 25 °C. These findings highlight the potential of ethyl cellulose/agarose aerogels loaded with (E)-2-hexenal as an innovative preservation strategy for fresh rice noodles, providing a promising method for enhancing food quality and longevity.
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ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Yijing Kuang,Wei Yuan,Xuyuan Chen,Xiaoning Wang,Xiaoying Wang
Background The expression of oncoprotein c-Myc (OP c-Myc ) in blood is closely related to the occurrence and development of various tumors. Common detection methods have the disadvantages of complicated procedures, expensive instruments, or low sensitivity. Currently, several single-mode immunosensors have been developed to detect OP c-Myc and overcome the above shortcomings. However, they are susceptible to the interference of the sensing interface and the external environment, which may lead to false-positive or false-negative results. Therefore, sensitive and accurate assessment of OP c-Myc levels in the blood is very important for the early diagnosis and monitoring of tumors. Results A novel electrochemiluminescence (ECL)-electrochemical (EC) dual-mode immunosensor was developed for the sensitive detection of trace OP c-Myc . Gold nanoparticles-magnetic reduced graphene oxide (AuMrGO), with a large surface area and conductivity, were stably fixed on a magnetic glassy carbon electrode and utilized as the immobilization platform. Ruthenium(II)tris(bipyridine) (Ru) doped Au, Ag, and Pd trimetallic nanocomposite (Tri-Ru) with excellent ECL and EC properties was synthesized by mechanical alloying method and used as the bifunctional signaling label. Further, combined with the trace detection advantages of indirect competition, the convenient and sensitive dual-mode detection of OP c-Myc was realized. The results showed a strong linear relationship for concentrations from 10 pg L −1 to 0.1 μg L −1 in ECL mode and from 0.1 ng L −1 to 1 μg L −1 in EC mode, with limits of detection (LOD) of 4.9 pg L −1 and 30 pg L −1 , respectively. The assay performed good analytical performances and clinical practicability in lymphoma patients’ blood samples. Significance This is the first detection of OP c-Myc using an ECL immunosensor, and it is also the first attempt to use a dual-mode detection strategy for OP c-Myc . The strategy could be used for sensing and detecting other proteomic tumor markers and established a promising platform for early auxiliary diagnosis and monitoring of cancers.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-10
·
IF 14.7
Luo Jiabei,Jin Yuefan,Li Linpeng,Chang Boya,Zhang Bin,Li Kerui,Li Yaogang,Zhang Qinghong,Wang Hongzhi,Wang Jing,Yin Shankai,Wang Hui,Hou Chengyi
Maintaining stillness is essential for accurate bioelectrical signal acquisition, but dynamic noise from breathing remains unavoidable. Isotropic adhesives are often used as bioelectronic interfaces to ensure signal fidelity, but they can leave irreversible residues, compromising device accuracy. We propose a hydrogel with selective frequency damping and asymmetric adhesion as a bioelectronic interface. This hydrogel mitigates dynamic noise from breathing, with a damping effect in the breathing frequency range 60 times greater than at other frequencies. It also exhibits an asymmetric adhesion difference of up to 537 times, preventing residues. By homogenizing ion distribution, extending Debye length, and densifying the electric field, the hydrogel ensures stable signal transmission over 10,000 cycles. Additionally, it can non-invasively diagnose otitis media with higher sensitivity than invasive probes and has been effective in clinical polysomnography monitoring, aiding in the diagnosis of obstructive sleep apnea.
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Chenxi Shi,Huan Wang,Xiaojing Wang,Kefeng Li,Pengbi Liu,Lihuan Wang,Hui Yu
Electrical stimulation (ES) dressings have garnered considerable attention owing to their profound impact on chronic wound care, while the existing ES dressings necessitate external power supply or intricate structures, posing potential safety risks and usage inconveniences. Herein, a safe, stable, simple, serviceable, and self-powered (5S) ES dressing composed of an electrospinning asymmetric nanofiber membrane with screen-printed electrodes and a polyurethane foam is developed. The asymmetric nanofiber membrane acts as the power due to its electrical double-layer effect during the unidirectional exudate transfer, and the polyurethane foam with excellent water absorption and retention properties effectively manages the exudate. This 5S dressing generates a sustained low-voltage direct current ES in situ at the wound site and creates a favorable microenvironment for wound re-epithelization. In vitro and in vivo studies indicate that this 5S dressing can significantly promote wound healing. Compared with the control group (on the 7th day), the collagen deposition of the 5S dressing treated group increased by 15.9%, the capillary density increased by 90.6%, and the epidermal thickness increased by 228.3%, resulting in a 23.6% enhancement in the wound healing rate. Consequently, the 5S wound dressing presents a highly sophisticated and effective therapeutic approach for accelerating wound healing.
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Jianhua Xiao,Jiaao Wu,Fangchen Zhu,Jiehao Ke,Qingxia Liu,Yang Wang,Liu Yuan,Huiling Tai,Yadong Jiang
Bias-switchable dual-mode organic photodiodes (OPDs) that integrate photovoltaic and photomultiplication modes are recently developed and shown prospects in complex light-intensity applications. Yet, the device physics that focuses on carrier dynamics is still a challenge and needs to be further explored. Herein, dual-mode OPDs are developed through interface layer manipulation, that is, introducing cathode interface layers (typically, Zn x O:D149) with deep energy levels and abundant bulk defects and an anode interface layer of thermally-evaporated ZnO (e-ZnO) with a wide bandgap. Under reverse bias, Zn x O:D149 forms a barrier wall to effectively block external holes and maintain the photovoltaic mode of the OPDs. Under forward bias, the capturing effect of Zn x O:D149 and blocking effect of e-ZnO help to reduce the dark current; when under illumination, defect traps capture photo-generated holes, eliminating the barrier traps and promoting unobstructed injection of external carriers to achieve photomultiplication effect. The typical device delivers high specific detectivity (>10 12 Jones) and fast response (<40 µs), and exhibits disparate external quantum efficiency in two operating modes, showing promise for simultaneously detecting faint and strong light. This general strategy for preparing dual-mode OPDs is compatible with CMOS processing technology and meets the miniaturization and integration requirements of next-generation detection systems.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Naiqiang Wang,Xiaoqing Si,Baiqi Zhang,Jianwei Gao,Mingsheng Li,Tong Lin,Rui Li,Chun Li,Junlei Qi,Jian Cao
A novel sintered-joining of Al 2 O 3 and AlN is achieved for the first time using micro-Ag particle interlayers in air. In comparison with reactive air brazing , this method addresses the issue of reduced strength caused by air holes in brazed joints . Also, this sintered-joining method can be performed at a lower temperature (920 °C), improving the joint strength by relieving the residual stresses. The sintering effect of micro-Ag particles and their high density of dislocations promote the recovery and recrystallization of the Ag interlayer, as well as the interdiffusion of Ag and ceramic. Ag–O clusters formed at the interface can be embedded into oxygen vacancies on the ceramic surface, playing a key role in interfacial joining. By optimizing joining temperature, assembly pressure and holding time, a maximum joint shear strength of 85.2 MPa is achieved at 920 °C for 30 min with an assembly pressure of 1 MPa. This study successfully prepares Al 2 O 3 /AlN joints with excellent mechanical properties, providing a reliable foundation for the fabrication of power integrated circuits with efficient operation.
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-12
·
IF 14.7
Mao Qian,Liao Zijian,Yuan Jinfeng,Zhu Rong
As robots are increasingly participating in our daily lives, the quests to mimic human abilities have driven the advancements of robotic multimodal senses. However, current perceptual technologies still unsatisfied robotic needs for home tasks/environments, particularly facing great challenges in multisensory integration and fusion, rapid response capability, and highly sensitive perception. Here, we report a flexible tactile sensor utilizing thin-film thermistors to implement multimodal perceptions of pressure, temperature, matter thermal property, texture, and slippage. Notably, the tactile sensor is endowed with an ultrasensitive (0.05 mm/s) and ultrafast (4 ms) slip sensing that is indispensable for dexterous and reliable grasping control to avoid crushing fragile objects or dropping slippery objects. We further propose and develop a robotic tactile-visual fusion architecture that seamlessly encompasses multimodal sensations from the bottom level to robotic decision-making at the top level. A series of intelligent grasping strategies with rapid slip feedback control and a tactile-visual fusion recognition strategy ensure dexterous robotic grasping and accurate recognition of daily objects, handling various challenging tasks, for instance grabbing a paper cup containing liquid. Furthermore, we showcase a robotic desktop-cleaning task, the robot autonomously accomplishes multi-item sorting and cleaning desktop, demonstrating its promising potential for smart housekeeping.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2020
·
IF 4.872
Bowen Xiao,Xiaolei Wang,Jing Yang,Kunkun Wang,Yinqing Zhang,Binbin Sun,Tong Zhang,Lingyan Zhu
The wide application of silver nanoparticles (AgNPs) has inevitably led to their release into the natural aquatic environment. Natural organic matter (NOM) is ubiquitous and would influence the fate and effects of these nanoparticles in such aquatic environments. Here we demonstrate that NOM plays an important role in the bioaccumulation kinetics and tissue distribution of AgNPs in zebrafish. In the presence of humic acid and fulvic acid , the uptake rates of AgNPs decreased while the depuration rates of AgNPs increased. As a result, the bioconcentration factor (BCF) of AgNPs in the entire body of the zebrafish was reduced. AgNPs were mainly taken up by the zebrafish via oral ingestion and were greatly accumulated in the liver, intestine and gill. In the intestine, NOM effectively inhibited the AgNPs from penetrating the cell membranes into internal tissues and also suppressed the disintegration and dissolution of AgNPs in gastrointestinal fluid, thereby decreasing the absorption of Ag by zebrafish. This research underlines the significance of incorporating the effects of NOM into predictive models for accurately assessing the toxicity and ecological risks of nanoparticles in natural aquatic environments.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Jiahui Li,Zhongmei Xia,Bin Tian,Longlong Tian,Tianyi Zhang,Chengxu Wang,Hao Wu,Jian Ni,Fuhua Hou,Yanlai Wang,Tiantian Li
Conductive hydrogels, widely recognized as flexible sensor materials for health monitoring, pose a research challenge in selecting suitable frameworks and designing multifunctional composites that balance conductivity, transparency, self-healing, and mechanical properties. In this work, a simple and efficient plant-template method (corn husk) is used to generate a multifunctional textured hydrogel (PPA) with PEI and PVA as the transparent framework, without additional cross-linking agents. The resulting hydrogel exhibits high conductivity (8.56 S/m), excellent transparency (94% @ 550 nm for the nontextured variant), and remarkable stretchability (627.1%). Additionally, the PPA hydrogel exhibits remarkable self-healing capabilities, achieving a maximum self-healing efficiency of 94.68%. To enhance conductivity, AgNWs are applied to the PPA surface using a rod coating method, forming PPA@RCA with a conductivity of 12.39 S/m. This improvement is attributed to the interactions between the silver-based nanomaterials (AgNWs, AgNPs), Li+, and the PEI/PVA framework in PPA@RCA. The flexible wearable strain sensor based on PPA@RCA features a high gauge factor of 3.35 and instantaneous response characteristics (response time of 195 ms), exhibiting exceptional sensitivity and repeatability across diverse strain ranges and external stimuli. Therefore, the ultrahigh-conductive textured hydrogel, produced through a plant-template strategy, demonstrates significant potential for applications in tablet capacitive pens, writing devices, smart wearables, and health monitoring.
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MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Linghui Tang,Yue Wang,Wenwen Yu,Yan Dong,Yasushi Hasebe
Heavy metal ions have significant risks to both environment and human health, and their detrimental effects are irreversible. Therefore, a sensor capable of simultaneous detecting heavy metal ions with high accuracy presents a significant challenge. In this work, a conductive hydrogel was synthesized using 2-acrylamido-2-methyl-1-propanesulfonic acid (AMPS), methacrylamide (MAM), and hydroxyethyl methacrylate (HEMA) as monomers, N, N’-methylenebis(acrylamide) as the crosslinker, through physically doping with silver nanoparticles. The prepared hydrogel has the characteristics of good conductivity, excellent swelling ability and high adsorption capacity for enrichment of heavy metal ions (HIMs). The three-dimensional network hydrogel was directly used for simultaneous detection of HIMs in multiplex system, with superior separation ability, good linear ranges, excellent reproducibility and good long-time stability. Additionally, this sensor can accurately detect Cu 2+ in river sample, demonstrating high precision and applicability. The fabrication of the hydrogel electrochemical sensor is simple and mild, allowing for the electrochemical capture of various HIMs and holds practical application prospect.
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