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Bioinspired Ultrasensitive Flexible Strain Sensors for Real‑Time Wireless Detection of Liquid Leakage

Nano-Micro Letters 2025年第3期17卷 310-327页

作者： Weilong Zhou Yu Du Yingying Chen Congyuan Zhang Xiaowei Ning Heng Xie Ting Wu Jinlian Hu Jinping Qu key laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationHubei Key Laboratory of Material Chemistry and Service Failure and Hubei Engineering Research Center for Biomaterials and Medical Protective MaterialsSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074People’s Republic of China School of Materials Science and engineering Wuhan Institute of TechnologyWuhan 430205People’s Republic of China Department of biomedical engineering City University of Hong KongHong KongSAR 999077People’s Republic of China

Liquid leakage of pipeline networks not only results in considerableresource wastage but also leads to environmental pollution and ecological *** response to this global issue, a bioinspired superhydrophobic thermoplastic polyurethane/carbon nanotubes/graphene nanosheets flexible strain sensor (TCGS) hasbeen developed using a combination of micro-extrusion compression molding andsurface modification for real-time wireless detection of liquid leakage. The TCGSutilizes the synergistic effects of Archimedean spiral crack arrays and micropores,which are inspired by the remarkable sensory capabilities of scorpions. This designachieves a sensitivity of 218.13 at a strain of 2%, which is an increase of 4300%. Additionally, it demonstrates exceptional durability bywithstanding over 5000 usage cycles. The robust superhydrophobicity of the TCGS significantly enhances sensitivity and stability indetecting small-scale liquid leakage, enabling precise monitoring of liquid leakage across a wide range of sizes, velocities, and compositionswhile issuing prompt alerts. This provides critical early warnings for both industrial pipelines and potential liquid leakage scenariosin everyday life. The development and utilization of bioinspired ultrasensitive flexible strain sensors offer an innovative and effectivesolution for the early wireless detection of liquid leakage.

关键词： Thermoplastic polyurethane Bioinspired Cracks Liquid leakage Flexible strain sensor

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浅陷阱态调控增强绿色发光钙钛矿微球的负热猝灭效应（英文）

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Science China Materials 2025年第1期 149-155页

作者：林圳旭黄锐宋捷张毅林泽文李洪亮吴海霞侯得健郭艳青王静朱剑豪 School of Materials Science and engineering Hanshan Normal University ministry of education key laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and Technologies Sun YatSen University Department of Physics Department of Materials Science and Engineering and Department of Biomedical Engineering City University of Hong Kong

发光材料中的负热猝灭（NTQ）现象,表现为随温度升高发光强度增加,在照明和显示技术中具有广泛应用前景.然而,在金属卤化物钙钛矿中实现NTQ具有一定挑战性,其机制尚不完全清楚.本研究通过低温光致发光、长余辉和热释光谱技术,系统研究了...

发光材料中的负热猝灭（NTQ）现象,表现为随温度升高发光强度增加,在照明和显示技术中具有广泛应用前景.然而,在金属卤化物钙钛矿中实现NTQ具有一定挑战性,其机制尚不完全清楚.本研究通过低温光致发光、长余辉和热释光谱技术,系统研究了CsPbBr3微球中NTQ现象的起源.结果表明, NTQ现象与浅陷阱态中载流子的释放密切相关.实验与理论分析揭示,这些浅缺陷态的能级位于导带下方约0.135 eV处.快速热处理可显著增加浅陷阱的密度,从而增强NTQ效应,使室温下的光致发光强度较150 K时提高了60%以上.同时,该处理将受激自发辐射的阈值降低至约45 W/cm2.本研究不仅加深了对CsPbBr3微球中NTQ机制的理解,也为通过能态调控提升钙钛矿光电子器件性能开辟了新途径.

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High sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber

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Optoelectronics Letters 2025年

作者： CUI Nan PAN Honggang ZHANG Ailing ZHAO Zihong CHEN Zhipan ZHANG Bo Tianjin key laboratory of Film Electronic and Communication Devices， engineering Research Center of Optoelectronic Devices and Communication Technology， ministry of education， School of Integrated Circuit Science and engineering， Tianjin University of Technology

In this paper， we propose and numerically characterize the optical characteristics of a high sensitivity dual polarization four channels surface plasmon resonance refractive index sensor with wide detection range and high linearity based on photonic crystal fiber （PCF）. Four light transmission channels are constructed by using big air holes. The small rectangular air hole in the center of the fiber core is used to add asymmetry. We use gold plasma material to achieve better sensing performance. A thin film of TiO2is placed on the PCF surface， which assists gold in the adhesion on PCF. The maximum wavelength sensitivity of the sensor can reach 20000 nm/RIU in both x and y polarization modes. While the maximum wavelength resolution of the sensor is 5×10-6RIU. The average wavelength sensitivity reached 15900nm/RIU and 15800nm/RIU in x and y polarization mode. The sensor features R2=0.9969 / R2=0.9966 high linear performance in x and y polarization mode and the maximum FOM values 509.13 RIU-1/ 489.63 RIU-1in x and y polarization mode. Besides the sensor’s detection range is 1.26-1.36， which is a wide refractive index detection range. The sensor has a wide range of applications in biomedical and other fields.

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功函促进钼基异质结电催化剂的电子结构重整提升其析氢反应活性（英文）

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Science China Materials 2025年第1期 189-198页

作者：陈想冯帅谢松苗亚萍高标张旭明黄莉李筠 Paul K.Chu 彭祥 Hubei key laboratory of Plasma Chemistry and Advanced Materials Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education School of Materials Science and Engineering Wuhan Institute of Technology School of Textile Science and engineering Xi'an Polytechnic University The State key laboratory of Refractories and Metallurgy Institute of Advanced Materials and Nanotechnology Wuhan University of Science and Technology Guizhou Wujiang Hydropower Development Co. Ltd. Department of Physics Department of Materials Science and Engineering and Department of Biomedical Engineering City University of Hong Kong

Mo基催化剂在电催化析氢反应（HER）中具有巨大应用潜力.然而,其活性位点的暴露不足、极强的氢吸附能力导致其催化性能未能充分体现.本文在碳布上构筑了Mo2N–MoSe2异质结（MNS）,以增强Mo基催化剂的HER活性.由于MNS中的Mo2N具有较低的...

Mo基催化剂在电催化析氢反应（HER）中具有巨大应用潜力.然而,其活性位点的暴露不足、极强的氢吸附能力导致其催化性能未能充分体现.本文在碳布上构筑了Mo2N–MoSe2异质结（MNS）,以增强Mo基催化剂的HER活性.由于MNS中的Mo2N具有较低的功函数,能够在异质界面产生内建电场,显著提高了其在HER中电荷转移效率.此外,MNS中原子之间的强电子相互作用优化了Mo位点的电子结构,降低了氢吸附能力,进一步增强了其本征催化活性.因此, MNS催化剂产生20 m A cm-2和1 A cm-2的析氢电流密度所需的过电位仅为65和210 mV, Tafel斜率仅为96 mV dec-1.此外, MNS在1 A cm-2电流密度下稳定运行240小时后,形貌、结构和性能均无明显变化.以上研究结果为工业大电流制氢所需的非贵金属基电催化剂的设计和合成提供了新思路.

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Systemic antibiotics increase microbiota pathogenicity and oral bone loss

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International Journal of Oral Science 2023年第1期15卷 99-112页

作者： Xulei Yuan Fuyuan Zhou He Wang Xinxin Xu Shihan Xu Chuangwei Zhang Yanan Zhang Miao Lu Yang Zhang Mengjiao Zhou Han Li Ximu Zhang Tingwei Zhang Jinlin Song chongqing key laboratory for Oral Diseases and biomedical Sciences Chongqing Municipal Key Laboratory for Oral Biomedical Engineering of Higher EducationStomatological Hospital of Chongqing Medical UniversityChongqingChina

Periodontitis is the most widespread oral disease and is closely related to the oral *** oral microbiota is adversely affected by some pharmacologic *** antibiotics are widely used for infectious diseases but can lead to gut dysbiosis,causing negative effects on the human *** systemic antibiotic-induced gut dysbiosis can affect the oral microbiota or even periodontitis has not yet been *** this research,mice were exposed to drinking water containing a cocktail of four antibiotics to explore how systemic antibiotics affect microbiota pathogenicity and oral bone *** results demonstrated,for the first time,that gut dysbiosis caused by long-term use of antibiotics can disturb the oral microbiota and aggravate ***,the expression of cytokines related to Th17 was increased while transcription factors and cytokines related to Treg were decreased in the periodontal *** microbiota transplantation with normal mice feces restored the gut microbiota and barrier,decreased the pathogenicity of the oral microbiota,reversed the Th17/Treg imbalance in periodontal tissue,and alleviated alveolar bone *** study highlights the potential adverse effects of long-term systemic antibiotics-induced gut dysbiosis on the oral microbiota and periodontitis.A Th17/Treg imbalance might be related to this ***,these results reveal that the periodontal condition of patients should be assessed regularly when using systemic antibiotics in clinical practice.

关键词： Th17/Treg diseases reversed

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Support vector machine applied in QSAR modelling

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Chinese Science Bulletin 2005年第20期50卷 2291-2296页

作者： MEI Hu ZHOU Yuan LIANG Guizhao LI Zhiliang College of Chemistry and Chemical engineering Chongqing University Chongqing 400044 China key laboratory of biomedical engineering of ministry of education and chongqing city Chongqing 400044 China College of Bioengineering. chongqing University Chongqing 400044 China

Support vector machine (SVM), partial least squares (PLS), and Back-Propagation artificial neural net- work (ANN) were employed to establish QSAR models of 2 dipeptide datasets. In order to validate predictive capabilities on external dataset of the resulting models, both internal and external validations were performed. The division of dataset into both training and test sets was carried out by D-optimal design. The results showed that support vector machine (SVM) behaved well in both calibration and prediction. For the dataset of 48 bitter tasting dipeptides (BTD), the results obtained by support vector regression (SVR) were superior to that by PLS in both calibration and prediction. When compared with BP artificial neural network, SVR showed less calibration power but more predictive capability. For the dataset of angiotensin-converting enzyme (ACE) inhibitors, the results obtained by support vector machine (SVM) re- gression were equivalent to those by PLS and BP artificial neural network. In both datasets, SVR using linear kernel function behaved well as that using radial basis kernel func- tion. The results showed that there is wide prospect for the application of support vector machine (SVM) into QSAR modeling.

关键词：支撑向量装置 SVM 最小二乘法 QSAR模型人工神经网络

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Stress-strain Model of Corroded Concrete under Uniaxial Compressive Loading

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Journal of Wuhan University of Technology(Materials Science) 2010年第2期25卷 303-307页

作者：陈朝晖黄河 College of Civil engineering Chongqing University ministry of education key laboratory of Construction and New Technology of Mountain city

The prism specimens of corroded concrete were subjected to uniaxial compressive load to develop the stress-strain model. Compared to the un-corroded concrete, the mechanical prop- erties of corroded concrete, such as peak strength, Young＇s modulus, and residual deformation, et al are degraded. The concrete, which were subjected to the aggressive media in the environment, were resulted in randomly distributed pre-loading flaws and defects. The propagation of these corrosion flaws during the procedure of loading was the main reason of degradation of corroded concrete properties. By the application of the statistic theory of continuum damage, the compressive stress-strain curve of corroded concrete was simulated. The initial damage factor was introduced to represent the corrosive effects of different media. The present damage constitutive model agreed well with the test results.

关键词： concrete corrosion damage theorem statistics compressive stress-strain curve

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Extracellular vesicles derived from human dental mesenchymal stem cells stimulated with low-intensity pulsed ultrasound alleviate inflammation-induced bone loss in a mouse model of periodontitis

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Genes & Diseases 2023年第4期10卷 1613-1625页

作者： Tingwei Zhang Ziqi Chen Mengyuan Zhu Xuan Jing Xiaohui Xu Xulei Yuan Mengjiao Zhou Yanan Zhang Miao Lu Duanjing Chen Shihan Xu Jinlin Song chongqing key laboratory for Oral Diseases and biomedical Sciences Chongqing Municipal Key Laboratory for Oral Biomedical Engineering of Higher Educationand Stomatological Hospital of Chongqing Medical UniversityChongqing 401147China

Extracellular vesicles(EVs)derived from mesenchymal stem cells(MSCs)have emerged as a new mode of intercellular crosstalk and are responsible for many of the thera-peutic effects of *** promote the application of MSC-EVs,recent studies have focused on the manipulation of MSCs to improve the production of EVs and EV-mediated *** current paper details an optimization method using non-invasive low-intensity pulsed ul-trasound(LIPUS)as the stimulation for improving oral MSC-EV production and *** cells from apical papilla(SCAP),a type of oral mesenchymal stem cell,displayed inten-sity-dependent pro-osteogenic and anti-inflammatory responses to LIPUS without significant cytotoxicity or *** stimuli increased the secretion of EVs by promoting the expres-sion of neutral sphingomyelinases in *** addition,EVs from LIPUS-induced SCAP exhibited stronger efficacy in promoting the osteogenic differentiation and anti-inflammation of peri-odontal ligament cells in vitro and alleviating oral inflammatory bone loss in *** addition,LIPUS stimulation affected the physical characteristics and miRNA cargo of *** investigations indicated that miR-935 is an important mediator of the pro-osteogenic and anti-inflammatory capabilities of LIPUS-induced *** together,these findings demonstrate that LIPUS is a simple and effective physical method to optimize SCAP-EV produc-tion and efficacy.

关键词： Extracellular vesicles Low-intensity pulsed ultrasound Oral bone loss Periodontitis Stem cells from apical papilla

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Electroformation and collection of giant liposomes on an integrated microchip

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Chinese Chemical Letters 2019年第2期30卷 353-358页

作者： Zhenyu Wang Chaoxiong Wu Ting Fan Xianwei Han Qiong Wang Jincan Lei Jun Yang State key laboratory of Ultrasound engineering in Medicine Co-Founded by chongqing ξ the ministry of Science ξ Technology College of Biomedical Engineering Chongqing Medical University key laboratory of Biorheological Science and Technology (chongqing University) Ministry of Education and Key Lab of Visual Damage and Regeneration ξ Restoration of ChongqingBioengineering College Chongqing University chongqing engineering and Technology Research Center of Intelligent Rehabilitation and Eldercare Chongqing City Management College

Giant liposome is an important lipid structure widely used in biological and medical fields. In its main preparation method, electroformation, many influencing factors must be optimized for good effect. How to collect the desired giant liposomes is another major issue. In this work, a microchip with a reactor chamber array was used to study the influences of multiple parameters, and a suitable condition could be achieved rapidly and efficiently. A tailor-made collection chamber was also integrated on the chip. Based on the multifactor and multilevel orthogonal experiment, optimal conditions of the lipid solution, buffer solution, and electric signal were achieved with high efficiency. More than one thousand giant liposomes could be formed in each microscale reactor chamber, and most of them were unilamellar. The on-chip collection ratio of giant liposome carriers could also approximate to 40%.

关键词： Giant liposome Microchip ITO Electroformation Collection

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Versatile functionalization of amylopectin for effective biomedical applications

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Science China Chemistry 2015年第9期58卷 1461-1470页

作者： Ranran Wang Hao Hu Qin Cai Nana Zhao Yun Zhu Fujian Xu State key laboratory of Chemical Resource engineering Beijing University of Chemical Technology key laboratory of Carbon Fiber and Functional Polymers Ministry of Education Beijing laboratory of biomedical Materials chongqing Academy of Agricultural Science

Successful gene vectors should be with high transfection efficiency and minimal cytotoxicity. Natural polysaccharides, due to their good biocompatibility and biodegradability, have been widely studied and applied. Amylopectin is one of polysaccharides with dendritic structure and numerous hydroxyl groups that could be used for subsequent modification. In this work, a series of dendritic cationic gene vectors comprising amylopectin backbones and poly(2-(dimethylamino) ethyl methacrylate)(PDMAEMA) side chains with different lengths(termed as AMY-PDs) were readily prepared by atom transfer radical polymerization(ATRP). The gene condensation ability, cytotoxicity and gene transfection of AMY-PDs carriers were investigated. In comparison with "gold-standard" poly(ethyleneimine)(PEI, 25 k Da), the AMY-PDs exhibited higher transfection efficiency with lower cytotoxicity. AMY-PDs could be further modified with Au nanoparticles(termed as AMY-PD@Au). The potential of the AMY-PD@Au vectors to be utilized as a CT contrast agent for imaging of cancer cells was investigated. Such AMY-PD@Au vectors may realize gene therapy with the ability of real-time imaging.

关键词： amylopectin ATRP gene carriers CT imaging

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