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Self-assembled monolayers for electrochemical migration protection of low-temperature sintered nano-Ag paste

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Rare Metals 2022年第4期41卷 1239-1244页

作者： Shan Wan Hong Wang Jin-Hang Liu bo-kai liao Xing-Peng Guo School of Chemistry and Chemical Engineering Guangzhou Key Laboratory for Clean Energy and MaterialsGuangzhou UniversityGuangzhou 510006China School of Chemistry and Chemical Engineering Jiangxi Province Engineering Research Center of Ecological Chemical IndustryJiujiang UniversityJiujiang 332005China School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074China

The protective self-assembled monolayers(SAMs)were fabricated on the surface of low-temperature sintered nano-Ag paste electrode in the sodium mercaptobenzothiazole(MBT-Na)solution at room *** migration(ECM)behavior was investigated using waterdrop test,andthemeantimeto failure was employed as a parameter to evaluate ECM *** electrochemical meth-ods,including electrochemical impedance,potentiodynamic polarization curves,localized electrochemical impedance spectroscopy and scanning Kelvin probe,have been carried out to clarify the formation process of *** indi-cated that growth of tree-like silver dendrites after ECM tests resulted in the short circuit between twin *** SAMs-coated electrode can reduce the rate of anodic disso-lution and thus retard the growth of *** ECM inhibition efflciency increased with the concentration of MBT-Na *** the optimum self-assembled time was 60 min.A higher applied bias resultedin a shorter failuretime for *** relevant mechanisms have been proposed.

关键词： electrochemical paste electrode

Insight into microstructure evolution on anti-corrosion property of Al_(x)CoCrFeNiC_(0.01) high-entropy alloys using scanning vibration electrode technique

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Rare Metals 2023年第10期42卷 3455-3467页

作者： bo-kai liao Zhan-Xiang Liang Zhi-Gang Luo Yue Liu Hao-Wei Deng Tao Zhang Xing-Peng Guo Qi-Sen Ren Hong-En Ge School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou510006China School of Physics and Materials Science Center of Advanced Functional MaterialsGuangzhou UniversityGuangzhou510006China Joint Institute of Guangzhou University and Institute of Corrosion Science and Technology Guangzhou UniversityGuangzhou510006China Science and Technology Digitization Department China General Nuclear Power CorporationShenzhen518038China Institute of Nuclear Fuel and Materials China Nuclear Power Technology Research InstituteShenzhen518031China Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan430074China

The effect of micro structure on the corrosion resistance of Al_(x)CoCrFeNiC_(0.01)(x=0.2,0.7,and 1.2)high-entropy alloys(HEAs) was systematically studied in this *** microstructure evolution by regulating the Al content was analyzed in *** behavior was in situ monitored using the scanning vibration electrode technique,as well as some traditional electrochemical *** is interesting to find that the compositions of body-centered cubic(bcc) and face-centered cubic(fcc)phases changed with the rising Al content,while the corresponding electrochemical responses for both phases were discriminated using the scanning Kelvin probe force microscopy *** element was mainly distributed in the bcc phase for Al0.2(x=0.2) alloy,while its distribution changed to the fcc phase for the A10.7 and *** micro-galvanic corrosion cells formed between Cr-depleted and Cr-rich phases,resulting in the localized corrosion behaviors for the Al_(x)CoCrFeNiC_(0.01) HEAs,and the order for anti-corrosion property was Al0.2>Al1.2> Al0.7 HEAs.

关键词： High-entropy alloy Corrosion Mechanical property Scanning vibration electrode technique

Comparative investigation on copper atmospheric corrosion by electrochemical impedance and electrical resistance sensors

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Transactions of Nonferrous Metals Society of China 2021年第10期31卷 3024-3038页

作者： Shan WAN bo-kai liao Ze-hua DONG Xing-peng GUO School of Chemistry and Chemical Engineering Guangzhou UniversityGuangzhou 510006China Hubei Key Laboratory of Material Chemistry and Service Failure School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Electrochemical impedance(EIS)and thin electrical resistance(ER)sensors were invented for atmospheric corrosion measurement of copper(Cu)during cyclic wetting−drying/high−low temperature tests and field exposure ***-month field exposure results showed that average corrosion rate of Cu measured by ER sensor was well in accordance with that by weight loss *** cyclic wetting−drying test,EIS was proven to reflect sensitively time of wetting and drying on the surface of *** corrosion rate obtained from EIS had a similar tendency to that obtained from ER sensors,the former was more dependent on environmental humidity than the *** relative humidity was low than 60%,corrosion rate of Cu measured by EIS was much lower than that by weight loss method,mainly attributing to the fact that impedance sensor failed to detect corrosion current of interlaced Cu electrodes due to the breakdown of conductive passage composed of absorbed thin liquid film under low humidity ***,ER sensor was proven to be more suitable for atmospheric corrosion monitoring than electrochemical techniques because it could sensitively monitor thickness loss of Cu foil according to the Ohmic law,no matter how dry or wet the sensor surface is.

关键词： atmospheric corrosion copper electrical resistance probe electrochemical impedance in-situ corrosion monitoring

Graphene oxide wrapped-silica microspheres humidity sensor with fast response/recovery, high sensitivity, and selectivity for pig respiratory rate monitoring

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Science China Technological Sciences 2025年

作者： Jing LI bo LI Ziqi liao Yunhui DUAN Xinglan FU Yuehua HUANG Guanglin LI College of Engineering and Technology Southwest University Modern Agricultural Equipment Research Institute Xihua University

Respiratory rate monitoring is of great significance in pig healthy breeding for the early detection and timely prevention of respiratory diseases. Humidity sensing is an important noncontact method to monitor pig respiration, which does not cause direct harm to pigs and meets the requirements of animal welfare. This paper proposes a humidity sensor based on graphene oxide wrapped-silica microspheres （GO@SiO2）. First, the sensor shows fast response/recovery performances of0.24/0.73 s. Experiments demonstrate that the wrapped microsphere structure can inhibit water aggregation. It is speculated that the wrapped microsphere structure can inhibit the stacking of GO, and its curved surface can promote the evaporation of water molecules. Second, the sensor shows a high sensitivity of 1.2%/%RH–4.2%/%RH in 11%–95%RH range. This can be attributed to different sensing mechanisms, from hopping transport to increasing ion transport, leading to a significant change in the sensor’s resistance. Third, the sensor shows selectivity to water molecules due to the hydrophilic characteristic of GO and the significant increase in conductivity by ion transport. Finally, the sensor is applied to realize the respiratory rate monitoring of adult pigs and piglets.

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Human-induced pluripotent stem cell-derived neural stem cell exosomes improve blood-brain barrier function after intracerebral hemorrhage by activating astrocytes via PI3K/AKT/MCP-1 axis

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Neural Regeneration Research 2025年第2期20卷 518-532页

作者： Conglin Wang Fangyuan Cheng Zhaoli Han bo Yan Pan liao Zhenyu Yin Xintong Ge Dai Li Rongrong Zhong Qiang Liu Fanglian Chen Ping Lei Department of Geriatrics Tianjin Medical University General HospitalTianjinChina School of Medicine Nankai UniversityTianjinChina Tianjin Neurological Institute TianjinChina

Cerebral edema caused by blood-brain barrier injury after intracerebral hemorrhage is an important factor leading to poor ***-induced pluripotent stem cell-derived neural stem cell exosomes(hiPSC-NSC-Exos)have shown potential for brain injury repair in central nervous system *** this study,we explored the impact of hiPSC-NSC-Exos on blood-brain barrier preservation and the underlying *** results indicated that intranasal delivery of hiPSC-NSC-Exos mitigated neurological deficits,enhanced blood-brain barrier integrity,and reduced leukocyte infiltration in a mouse model of intracerebral ***,hiPSC-NSC-Exos decreased immune cell infiltration,activated astrocytes,and decreased the secretion of inflammatory cytokines like monocyte chemoattractant protein-1,macrophage inflammatory protein-1α,and tumor necrosis factor-αpost-intracerebral hemorrhage,thereby improving the inflammatory *** sequencing indicated that hiPSC-NSC-Exo activated the PI3K/AKT signaling pathway in astrocytes and decreased monocyte chemoattractant protein-1 secretion,thereby improving blood-brain barrier *** with the PI3K/AKT inhibitor LY294002 or the monocyte chemoattractant protein-1 neutralizing agent C1142 abolished these *** summary,our findings suggest that hiPSC-NSC-Exos maintains blood-brain barrier integrity,in part by downregulating monocyte chemoattractant protein-1 secretion through activation of the PI3K/AKT signaling pathway in astrocytes.

关键词： AKT astrocyte blood-brain barrier cerebral edema exosomes human-induced pluripotent stem cells intracerebral hemorrhage neural stem cells neuroinflammation PI3K

A versatile synthetic strategy towards rare earth based metal-organic frameworks

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Science China Chemistry 2025年

作者： Quan Shi Yun-Hao Xu Ming-Hui Chen Peng Zhao Wen-bo Deng Ji Xiong kai Guo Ya-Qing Feng Bao Zhang School of Chemical Engineering and Technology Tianjin University Tianjin Collaborative Innovation Center of Chemical Science and Engineering Guangdong Laboratory Chemistry & Fine Chemical Industry Jieyang Center

Rare earth metal-organic frameworks (RE-MOFs) have drawn wide attention owing to diverse network structures and various application ***,due to the unpredictable formation of the nodes,it is still challenging to design novel RE-MOFs.A novel versatile strategy was developed employing a RE-acetate complex (RE2(CH3COO)6·4H2O) as a precursor to construct RE-MOFs.2D RE-MOFs (RE-DBP) and 3D RE-MOFs (RE-TCPP) could be obtained by using dicarboxylic porphyrin ligands H2DBP and tetracarboxylic porphyrin ligands H2TCPP,*** RE-MOFs were further synthesized to verify the universality of the *** crystalline RE-MOFs could also be prepared at room temperature via the developed strategy,which could significantly promote large-scale preparation and practical application of *** proof of the concept,the performance of porphyrin-based RE-MOFs was investigated in the photocatalytic cycloaddition of CO2with *** the RE-DBP(Co) MOFs,Tb-DBP(Co) exhibited the best photocatalytic performance,which was also greater than that of the corresponding 3D MOF Tb-TCPP(Co) due to the optimal 2D structure and thus the accelerated photogenerated charge separation and transfer *** work not only provides a novel versatile strategy to design and develop RE-MOFs,but also proposes a promising approach for the potential bulk production of RE-MOFs at room temperature.

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Molecular mechanism and research progress of traditional Chinese medicine in the treatment of prostate cancer

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Traditional Medicine Research 2025年第1期10卷 62-72页

作者： Hai-Luo Wang Ruo-Ran Zhang Hao Wang Peng Xu Jing-kai Wang bo Chen Hao Xu Deng Pan Yu-Yang Ma Kun Pang Department of Urology Xuzhou Central HospitalXuzhou Clinical School of Xuzhou Medical CollegeXuzhou 221009China Graduate School Jiangsu UniversityZhenjiang 212013China Graduate School Bengbu Medical UniversityBengbu 233040China Department of Urology The Peixian People’s HospitalXuzhou 221699China.

Prostate cancer(PCa)is one of the most common malignant tumors in the male genitourinary system,ranking second in incidence *** Chinese medicine(TCM),as an important component of complementary and alternative medicine,shows unique advantages in cancer *** herbal medicine is usually composed of multiple ingredients and involves multiple signaling pathways,which showed function of inducing apoptosis of cancer cells,arresting the cell cycle,inhibiting invasion and metastasis,reducing drug resistance,and regulating immune *** therapy is also an important treatment of ***,Physical therapy such as acupuncture or Tai Chi and Qigong are gaining increased recognition in the management of PCa,particularly in addressing issues like urinary incontinence and bone metastasis-related *** article reviews the TCM treatment and therapy of PCa,in order to provide new research avenues and treatment options for the treatment of PCa with TCM and improve the quality of life of patients.

关键词： traditional Chinese medicine prostate cancer Chinese herbal medicine physical therapy

Density Map Guided Region Localization for End-to-End Small Object Detection

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Journal of Systems Science and Information 2023年第6期11卷 776-794页

作者： bo LI kai HUANG Junhui LI Yufu liao Sichuan Jiuzhou Aerocont Technologies Co. Ltd.Mianyang 621000China

With the advancement of society and science and technology, the demand for detecting small objects in practical scenarios becomes stronger. Such objects are only represented by relatively small coverage of pixels, and the features are degraded severely after being extracted by a deep convolutional neural network, which is detrimental to the detection performance for small objects. Therefore, an intuitive solution is to increase the resolution of small objects by cropping the original image. In this paper, we propose a simple but effective object density map guided region localization module (DMGRL) to locate and crop the regions of interest where small objects may exist. Firstly, the density map of the objects is estimated by object density map estimation network, and then the coordinates of the small object regions are calculated;Secondly, the continuous differentiable affine transformation is utilized to crop these regions so that the detector with DMGRL can be trained end-to-end instead of two-stage training. Finally, the all prediction results of input image and cropped region images are merged together to output the final detection results by non maximum suppression (NMS). Extensive experiments demonstrate the superior performance of the detector incorporated DMGRL.

关键词： small object detection density map estimation end-to-end training affine transformation

Period analysis of the Logistic map for the finite field

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Science China(Information Sciences) 2017年第2期60卷 49-63页

作者： bo YANG Xiaofeng liao College of Electronic and Information Engineering Southwest University

Usually, the security of traditional cryptography which works on integer numbers and chaotic cryptosystem which works on real numbers is worthy of study. But the classical chaotic map over the real domain has a disadvantage that the calculation accuracy of the floating point number can be doubled when the map is implemented by computer. This is a serious drawback for practical application. The Logistic map is a classical chaotic system and it has been used as a chaotic cipher in the real number field. This inevitably leads to the degradation of finite precision under computer environment, and it is also very difficult to guarantee *** solve these drawbacks, we extend the Logistic map to the finite field. In this paper, we consider the Logistic map for the finite field N = 3~n, and analyze the period property of sequences generated by the Logistic map over ZN. Moreover, we discuss the control parameters which may influence the behavior of the mapping, and show that the Logistic map over ZN may be suitable for application by performance analysis. Ultimately, we find that there exists an automorphic map between two Logistic maps with the different control parameters, which makes them suitable for sequence generator in cryptosystem. The automorphic sequence generated algorithm based on the Logistic map over ZN is designed and analyzed in detail. These sequences can be used in the pseudorandom number generator, the chaotic stream cipher, and the chaotic block cipher, etc.

关键词： chaos Logistic map period analysis sequence generated algorithm Galois ring