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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PubMed
高影响因子
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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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Abdul Basit,Tanveer Hussain,Xin Li,Jiwu Xin,Bin Zhang,Xiaoyuan Zhou,Guoyu Wang,Ji-Yan Dai
Being a major obstacle, Ag2Te has always been restricted in p-type AgSbTe2-based materials to improve their thermoelectric performance. This work reveals a stabilized AgSbTe2 through Sn/Ge alloying as synthesized by melting, annealing, and hot press. Interestingly, addition of Sn/Ge in AgSbTe2 extended the solubility limit up to ∼30% and hence suppressed Ag2Te in Ag(1–x)SnxSb(1–y)GeyTe2 compounds and led to enhanced electrical transport. Moreover, electrical and thermal transport properties of AgSbTe2 have been greatly affected by the phase transition of Ag2Te near 425 K. However, high-entropy Ag0.85Sn0.15Sb0.85Ge0.15Te2 compound results in a stabilized rock-salt structure and presents a high power factor of ∼10.8 μW cm–1 K–2 at 757 K. Besides, density functional theory reveals that available multivalence bands in Sn/Ge-doped AgSbTe2 lead to reduction in energy offsets. Meanwhile, a variety of defects appear in the Ag0.85Sn0.15Sb0.85Ge0.15Te2 sample due to entropy change, and thus lattice thermal conductivity decreases. Ultimately, a high figure of merit of ∼1.5 is attained at 757 K. This work demonstrates a roadmap for other group IV–VI materials so that the high-entropy approach may inhibit the impurity phases with extended solubility limit and result in high thermoelectric performance.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 16
·1-11
·
IF 2.8
Yan Xunchang,Wang Sai,Nie Guangzhi,Gao Yuyu,Li Lin,Zhang Tong,Long Yun-Ze,Han Wenpeng
With the development of flexible wearable pressure sensors, capacitive pressure sensors using electric double-layer (EDL) effect have attracted much attention due to their advantages such as high sensitivity. In this study, an all-nanofiber ionic liquid EDL capacitive pressure sensor based on biodegradable polymer Polycaprolactone (PCL) is prepared by electrospinning technology. Based on the control of ionic liquid content in nanofibrous membranes, the performance of EDL capacitive pressure sensors has been investigated. The optimized device has a sensitivity of up to 26.4 kPa −1 in the range of below 10 kPa and 6.2 kPa −1 in the pressure range of 10 to 200 kPa. A detection limit as low as 8.53 Pa also gives it an advantage in detecting small pressures. Based on it, the prepared EDL capacitive pressure sensors have been successfully used to detect various physiological signals such as pulse, heartbeat, breathing, etc. In addition, the excellent mechanical properties and gas permeability also lay the foundation for its application in wearable electronics.
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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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CRYSTENGCOMM
·
2024
·Vol. 26
·期 10
·1418-1429
·
IF 2.6
Jun Liao,Sihao Ye,Xupeng Zhu,Wenfeng Fu,Shuwen Xue,Jing Qi,Jun Zhang
Kesterite Cu2ZnSnS4 (CZTS) is considered as one of the most promising thin-film solar cell and photocatalytic materials; however, its efficiency in practical photoelectric applications is often seriously limited by the presence of large numbers of Cu–Zn antisite defects. Alloying with Ag to fabricate Ag-alloyed CZTS ((AgxCu1−x)2ZnSnS4, ACZTS) can reduce the Cu–Zn antisite defects in CZTS, but few research studies have been able to separately clarify the effect of Ag content and growth temperature on large-sized (AgxCu1−x)2ZnSnS4 single crystals. In this study, centimeter-scale high-quality ACZTS single crystals were synthesized via an Ag-alloying strategy by a molten salt method for the first time. The results showed that the synthesized ACZTS have a high-quality single-crystal structure. A series of experiments was performed using various characterization techniques and it was found that Ag content and growth temperature were crucial in determining the size of ACZTS single crystals obtained through a molten salt method and that the associated CZTS base generated at high temperature was beneficial for further ACZTS single-crystal growth in this high-temperature environment. The experimental results showed that the growth mechanism of ACZTS crystals prepared using a molten salt method could be attributed to a type of epitaxial growth process. Our study provides a promising approach for growing large-sized ACZTS single crystals with high quality that can provide a potential single-crystal platform for the study of light-emitting diodes, photocatalytic hydrogen production, etc.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Teng-Fei Ma,Hong-Xi Ma,Chong-Yang Xing,Hui-Min Fu,Yu Shen,You-Peng Chen,Xiang-Yang Wei
This study combines physiological and proteomic analyses to explore the silver nanoparticles (Ag NPs) induced stress response and resistance mechanisms in the aerobic denitrifying Enterobacter cloacae strain HNR (strain HNR). Results demonstrated concentration-dependent inhibition: at 0.30 mM Ag NPs, bacterial growth (OD 600 ) decreased to 79.7 % of the control, while nitrate removal efficiency dropped to 52.4 %, accompanied by a 6.4-fold increase in nitrite accumulation. Activities of nitrate reductase and nitrite reductase were reduced to 34.3 % and 41.6 %, respectively. Ag NPs also compromised motility, induced oxidative stress (33.11 % rise in intracellular reactive oxygen species), and disrupted membrane integrity (10.4 % lactate dehydrogenase release). Conversely, extracellular polymeric substances (EPS) production surged by 25.6 % under low Ag NPs (0.01 mM), primarily driven by polysaccharide synthesis (55.5 % increase). Proteomics revealed 1987 differentially expressed proteins (978 upregulated, 1009 downregulated). Downregulated pathways (DNA repair, ribosome biosynthesis, glycerophospholipid metabolism, ABC transporters, oxidative phosphorylation, etc.) indicated that Ag NPs disrupted bacterial genome stability, inhibit synthesis of protein, cell membrane, and interfered with material transport and energy production. In response, strain HNR upregulated the sulfur relay system, tyrosine metabolism, and pentose and glucuronate interconversions to combat oxidative stress and energy metabolism inhibition. Additionally, strain HNR increased EPS production and cell surface positive electroactivity by upregulating the starch and sucrose metabolism and the cationic antimicrobial peptide resistance pathways to counteract the adsorption and contact of Ag NPs and silver ion. These findings will guide improvements in aerobic denitrification processes in NP-polluted aquatic environments and facilitate the broader application of aerobic denitrification technologies.
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BMC Oral Health
·
2025
·Vol. 25
·期 1
·1-16
·
IF 3.1
Guo Tiantian,Wang Dai,Gao Sherry Shiqian
Background To investigate the antibiofilm effect and mechanism of the silver nanowire (AgNW)-modified glass ionomer cement (GIC) against multi-species oral biofilm, and to examine the mechanical and biochemical properties of this novel GIC material. Methods Conventional GIC was incorporated with different concentrations of AgNW and silver nanoparticles (AgNP). Multi-species biofilms of Streptococcus mutans , Streptococcus sobrinus , Lactobacillus fermentum , and Lactobacillus rhamnosus were cultured for 72 h on GIC specimens. Scanning electron microscopy (SEM) was adopted to examine the accumulation of biofilm on GIC surfaces. A live/dead assay was performed to assess the viability of bacteria. Extracellular polysaccharides (EPS) were labelled with Alexa Fluor 647-labelled dextran conjugate and then observed by a confocal laser scanning microscope (CLSM). The D/L-Lactic Acid Assay Kit was used to evaluate the lactic acid production of the multi-species biofilms. Compressive strength, surface roughness, hardness, and wettability were measured by a universal testing machine, an atomic force microscope (AFM), a Vickers microhardness tester, and a contact angle meter, respectively. Colour stability and fluoride release of GIC specimens were assessed by VITA Easyshade® V and ion chromatography. Cell counting kit-8 (CCK-8) was used to study cytotoxicity. Results SEM images showed that fewer biofilms were accumulated on the AgNW-GIC surfaces. The live/dead assay showed that the ratio of live bacteria was significantly lower in AgNW-GIC groups than in conventional GIC (5.8% vs. 100%, p < 0.0001). The EPS production was significantly less in AgNW-GIC groups compared to conventional GIC ( p < 0.0001). There is no difference between groups regarding lactic acid production and fluoride release. The mechanical strength including compressive strength, surface roughness, hardness, and wettability were comparable between groups. The colour change between AgNW-GIC and conventional GIC was much milder than that between AgNP-GIC and conventional GIC. The results of cytotoxicity showed no significant differences in cell viability between groups. Conclusions This study demonstrated that AgNW-GIC had an excellent antibiofilm effect against multi-species oral biofilm, comparable mechanical and biochemical properties, and did not significantly affect the colour stability of GIC. The antibiofilm mechanism of AgNW-GIC may be related to inhibiting the viability and EPS production of bacteria.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lefan Li,Tuanzhang Li,Pengfei Zhao,Jingyuan Guo,Chengpeng Li,Zhang Hu,Sidong Li,Chengyong Li
Continuous steam generation is still challenging for existing solar-powered interfacial evaporation systems due to insufficient sunlight exposure in overcast day and time from late afternoon to early morning. Here, we present a novel solar-afterglow driven interfacial evaporation system that leverages the effective absorption and thermal conversion stemming from the afterglow of strontium aluminate (SAO) and photothermal effects of the multi-walled carbon nanotubes/silver/polyacrylamide (MWCNTs/Ag/PAM). In virtue of these synergetic effects, this system demonstrates an evaporation rate of 2.91 kg·m −2 ·h −1 under one sun (1 kW m −2 ) in the daytime and an enhanced evaporation capacity of 5.61 kg·m −2 under SAO-induced afterglow overnight. This innovative strategy significantly broadens the utilizing solar energy and emitted fluorescence for continuous interfacial evaporation in seawater desalination.
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Fishes
·
2025
·Vol. 10
·期 1
·29
·
IF 2.4
Yunqiang Guo,Chaoli Zheng,Yingfei Wang,Yongji Dang,Ruiyuan Li,Ye Tao,Yucheng Yang,Xiaofeng Sun,Zekun Song,Pengcheng Sun,Qian Zhang,Dandan Qian,Wenhao Ren,Xiyu Cao,Bowen Wang,Mengxi Xu,Bingyang Jiang,Yujing Li,Qing Sun,Jinye Wang,Lei Zheng,Yanling Sun
Aeromonasspecies are among the main pathogens causing rainbow trout infections. Silver nanoparticles (AgNPs) have a broad spectrum of antimicrobial properties and are usually produced by various green-synthesis methods. However, the application of commercialized AgNPs has not fully been clarified. Thus, the objective of this study was to evaluate the antibacterial activities of commercialized AgNPs (range of sizes 10–12 nm) on two contrastingA.salmonicidastrains (I-1 and I-4), isolated from rainbow trout; the antibacterial mechanism, histopathological alterations and the expression of immune-related genes were investigated. In vitro, the minimal inhibitory concentration (MIC) was 10 µg/mL for I-1, and lowered to 9.5 µg/mL for I-4, respectively. AgNPs were shown to disrupt both the cell wall and membrane of I-1 and I-4, resulting in cell lysis and degradation. In vivo, rainbow trout challenged by immersed or intraperitoneally injected infection, the 10 µg/mL AgNP-treated groups, both showed delayed deaths and lower mortalities compared to the control groups, without any clinical signs and pathological changes. Especially for the virulent I-4, the enhanced expressions of immune-related genes TNF-α, IL-1β, IL-10 and IL-11 were significantly reduced in the AgNP-treated group, indicating a lesser inflammation due to the application of AgNPs. This study would lay theoretical foundation for the wide application of silver nanoparticles in fish diseases.
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Laser & Photonics Reviews
·
2024
·
IF 9.8
Jianhua Xiao,Yang Wang,Jiaao Wu,Liu Yuan,Huiling Tai,Yadong Jiang
Tremendous research efforts are developed to suppress the reverse dark current ( J d ) and enhance the responsivity of organic photodiodes (OPDs). The functional layers of traditional OPDs usually follow the principle of energy level alignment to make unobstructed photo-carriers transport under reverse bias, but this inevitably leads to a large forward J d . Herein, a universal strategy is proposed to manipulate the carrier dynamics and effectively suppress the forward J d of OPDs, that is, tuning the energy level and electron traps of the anode interface layers (AILs). The bandgap and electron traps of typical organometallic chelate AIL (PEIE-Co) can be well controlled by adjusting the component ratio of PEIE and metal ions. The wide bandgap increases the carrier injection barrier under reverse and forward bias, endowing OPD with a much lower J d ; the electron traps induce hole tunneling injection by capturing photo-generated electrons under forward bias, thereby enabling the photomultiplication effect. The obtained OPD exhibits photoconductive/photomultiplication working mode at reverse/forward bias and the specific detectivity approaches ≈10 13 /10 12 Jones, showing promise for adaptively detecting faint and strong light. This study presents an intelligent strategy to achieve dual-mode OPDs, paving the way for the multifunctional development of photodetectors.
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高影响因子
STARCH-STARKE
·
2025
·
IF 2.7
Qin Chen,Xingyu Chen,Shiqing Song,Lingyun Yao,Huatian Wang,Di Zhao,Min Sun,Qian Liu,Chuang Yu,Tao Feng
High concentrations of pigment powders present significant challenges for dispersion stability in cosmetic formulations, the dispersion of iron oxide yellow paste may lead to flocculation, reducing its stability. This study employed octenyl succinate starch (OSA starch) and Arabic gum (AG) as composite wall materials to encapsulate iron oxide yellow and to optimize the dispersion system for water-soluble pigment powders. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) confirmed the formation of a well-structured microcapsule, significantly smaller than the original iron oxide yellow particles. Accelerated stability tests indicated that the microcapsule structure enhanced system stability, with improved performance observed at higher OAF solution concentrations. The contact angle measurements, which were consistently below 90°, demonstrated that the microcapsule structure enhanced the wettability and hydrophilicity of the OAF solution, thereby improving skin adhesion. The encapsulation of iron oxide yellow using OSA starch and AG underscores the potential application of natural hydrocolloids and modified starches in the cosmetics industry.
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