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Nanoparticles assembly-induced special wettability for bio-inspired materials

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Particuology 2013年第4期11卷 361-370页

作者： Shuai Yang Xu Jin Kesong Liu Leijiang Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of the Ministry of Education School of Chemistry and EnvironmentBeihang University Research Institute of Petroleum Exploration and Development Beijing National Laboratory for Molecular Sciences(BNLMS) Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of Sciences

Through billions of years of evolution, nature has optimized the programmed assembly of the nano- and micro-scale structures of biological materials. Nanoparticle assembly provides an avenue for mimick- ing these multiscale functional structures. Bio-inspired surfaces with special wettability have attracted much attention for both fundamental research and practical applications. In this review, we focus on recent progress in nanoparticle assembly-induced special wettability, including superhydrophilic surfaces, superhydrophobic surfaces, superamphiphobic surfaces, stimuli-responsive surfaces, and self- healing surfaces. A brief summary and an outlook of the future of this research field are also provided.

关键词： Nanoparticle assemblyBio-inspired materialsWettabilitySurface

Hierarchical structures hydrogel evaporator and superhydrophilic water collect device for efficient solar steam evaporation

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Nano Research 2021年第4期14卷 1135-1140页

作者： Wenwei Lei Sovann Khan Lie Chen Norihiro Suzuki Chiaki Terashima Kesong Liu Akira Fujishima Mingjie liu Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China Photocatalysis International Research Center Tokyo University of Science2641 YamazakiNodaChiba 278-8510Japan

Efficient light absorption and trapping are of vital importance for the solar water evaporation by hydrogel-based photothermal conversion materials.Conventional strategies are focused on the development of the composition and structure of the hydrogers internal network.In our point of view,the importance of the surface structure of hydrogel has usually been underestimated or ignored.Here inspired by the excellent absorbance and water transportation ability of biological surface structure,the hierarchical structured hydrogel evaporators(HSEs)increased the light absorption,trapping,water transportation and water-air interface,which is the beneficial photothermal conversion and water evaporation.The HSEs showed a rapid evaporation rate of 1.77 kg·m^(-2)·h^(-1)at about 92%energy efficiency under one sun(1 kW·m^(-2)).Furthermore,the superhydrophilic window device was used in this work to collect the condensed water,which avoids the light-blocking caused by the water mist formed by the small droplets and the problem of the droplets stick on the device dropping back to the bulk water.Integrated with the excellent photothermal conversion hydrogel and superhydrophilic window equipment,this work provides efficient evaporation and desalination of hydrogel-based solar evaporators in practical large-scale applications.

关键词： light-trapping large-scale hierarchical structure hydrogel evaporator solar steam evaporation superhydrophilic window

Unexpected de-twinning of strongly-textured Ti mediated by local stress

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Journal of Materials Science & Technology 2022年第30期125卷 231-237页

作者： kesong Miao Meng Huang Yiping Xia Hao Wu Qing liu Guohua Fan Key Laboratory for Light-weight Materials Nanjing Tech UniversityNanjing 211816China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

As one of the heterostructures,the layered structure has attracted extensive research interests as it could regulate the deformation mechanisms[1-3].A remarkable combination of strength and ductility has been achieved in layered metals,including CuCu[4-6],Cu-Ni[7],Cu-Al[8,9],Cu-Ti[10],Ti-Ti[11,12],and Ti-Al[13-15].During deformation,mechanical mismatch(discrepancies of yield strength,work hardening,etc.)between component layers leads to mutual constraints,which generates local stress and local strain that deviate from the applied counterparts[16-18].As a result,the activation of additional deformation mechanisms is promoted in layered metals,such as slip systems with low Schmid factor or high critical resolved shear stress[19,20].

关键词： stress deformation strength

Fabricating ion-conducting channel in SU-8 matrix for highperformance patternable polymer electrolytes

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Nano Research 2023年第1期16卷 496-502页

作者： Tianzhao Li Xuelei Pan Zhongzhuo Yang Fang liu kesong Yu Lin Xu Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Advances in electrochemical energy storage technologies drive the need for battery safety performance and miniaturization,which calls for the easily processable polymer electrolytes suitable for on-chip microbattery technology.However,the low ionic conductivity of polymer electrolytes and poor-patternable capabilities hinder their application in microdevices.Herein,we modified SU-8,as the matrix material,by poly(ethylene oxide)(PEO)with lithium salts to obtain a patternable lithium-ion polymer electrolyte.Due to the highly amorphous state and more Li-ion transport pathways through blending effect and the increase in number of epoxides,the ionic conductivity of achieved sample is increased by an order of magnitude to 2.9×10^(−4) S·cm^(−1) in comparison with the SU-8 sample at 50°C.The modified SU-8 exhibits good thermal stability(>150°C),mechanical properties(elastic modulus of 1.52 GPa),as well as an electrochemical window of 4.3 V.Half-cell and microdevice were fabricated and tested to verify the possibility of the micro-sized on-chip battery.All of these results demonstrate a promising strategy for the integration of on-chip batteries with microelectronics.

关键词： polymer electrolytes patternable electrolytes on-chip battery lithium-ion battery

High-resolution 3D crustal S-wave velocity structure of the MiddleLower Yangtze River Metallogenic Belt and implications for its deep geodynamic setting

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Science China Earth Sciences 2019年第9期62卷 1361-1378页

作者： Song LUO Huajian YAO Qiusheng LI Weitao WANG kesong WAN Yafeng MENG Bin liu Laboratory of Seismology and Physics of the Earth’s Interior School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China National Geophysical Observatory at Mengcheng University of Science and Technology of China Mengcheng 233500 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geophysics Chinese Earthquake Administration Beijing 100081 China

The Middle-Lower Yangtze River Metallogenic Belt(MLYMB) is an important mineral resource region in China.High-resolution crustal models can provide crucial constraints to understand the ore-forming processes and geodynamic setting in this region. Using ambient seismic noise from 107 permanent and 82 portable stations in the MLYMB and the adjacent area,we present a new high-resolution 3D S-wave velocity model of this region. We first extract 5–50 s Rayleigh wave phase velocity dispersion data by calculating ambient noise cross-correlation functions(CFs) and then use the surface wave direct inversion method to invert the mixed path travel times for the 3D S-wave velocity structure. Checkerboard tests show that the horizontal resolution of the 3D S-wave velocity model is approximately 0.5°–1.0° and that the vertical resolution decreases with increasing noise and depth. Our high-resolution 3D S-wave velocity model reveals:(1) AV-shaped high-velocity zone(HVZ) is located in the lower crust and the uppermost mantle in the study region. The western branch of the HVZ passes through the Jianghan Basin,the Qinling-Dabie orogenic belt and the Nanxiang Basin. The eastern branch, which almost completely covers the main body of the MLYMB, is located near the Tanlu Fault. The low-velocity anomalies between the western and eastern branches are located in the area of the Qinling-Dabie orogenic belt.(2) High-velocity uplifts(HVUs) are common in the crust of the MLYMB,especially in the areas near the Tanlu Fault, the Changjiang Fault and the Yangxin-Changzhou Fault. The intensities of the HVUs gradually weaken from west to east. The V-shaped HVZ in the lower crust and uppermost mantle and the HVUs in the middle and lower crust likely represent cooled mantle intrusive rocks. During the Yanshanian period, fault systems formed in the MLYMB due to the convergence between the South China Plate and the North China Plate, the multiple-direction drifting of the PaleoPacific Plate and its subduction beneath the Eurasian Plate. The dehydrati

关键词： Middle-Lower Yangtze River Metallogenic Belt Ambient noise Surface wave Crustal structure Mineralization dynamics

7YSZ coating prepared by PS-PVD based on heterogeneous nucleation

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Chinese Journal of Aeronautics 2018年第4期31卷 820-825页

作者： Ziqian DENG Xiaofeng ZHANG kesong ZHOU Min liu Chunming DENG Jie MAO Zhikun CHEN School of Materials and Energy Guangdong University of Technology Guangzhou 510006 China National Engineering Laboratory for Modern Materials Surface Engineering Technology & the Key Lab of Guangdong for Modern Surfuce Engineering Technology Guangdong Institute of New Materials Guangzhou 510650 China School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

Plasma spray-physical vapor deposition（PS-PVD） as a novel coating process based on low-pressure plasma spray（LPPS） has been significantly used for thermal barrier coatings（TBCs）.A coating can be deposited from liquid splats, nano-sized clusters, and the vapor phase forming different structured coatings, which shows obvious advantages in contrast to conventional technologies like atmospheric plasma spray（APS） and electron beam-physical vapor deposition（EBPVD）. In addition, it can be used to produce thin, dense, and porous ceramic coatings for special applications because of its special characteristics, such as high power, very low pressure, etc. These provide new opportunities to obtain different advanced microstructures, thus to meet the growing requirements of modern functional coatings. In this work, focusing on exploiting the potential of gas-phase deposition from PS-PVD, a series of 7 YSZ coating experiments with various process conditions was performed in order to better understand the deposition process in PS-PVD, where coatings were deposited on different substrates including graphite and zirconia. Meanwhile, various substrate temperatures were investigated for the same substrate. As a result, a deposition mechanism of heterogeneous nucleation has been presented showing that surface energy is an important influencing factor for coating structures. Besides, undercooling of the interface between substrate and vapor phase plays an important role in coating structures.

关键词： 7YSZ Deposition mechanism Heterogeneous nucleation PS-PVD TBC

Reaction Mechanism and Thermal Insulation Property of Al-deposited 7YSZ Thermal Barrier Coating

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Journal of Materials Science & Technology 2015年第10期31卷 1006-1010页

作者： Xiaofeng Zhang kesong Zhou Wei Xu Jinbing Song Chunming Deng Min liu School of Materials Science and Engineering South China University of Technology Institute of New Materials Guangzhou Research Institute of Non-ferrous Metals

To increase the performance and efficiency of thermal barrier coating （TBC）, it is important to improve the thermal insulation property. In this work, a columnar AI film was deposited at the top of 7 wt% yttria- stabilized zirconia （7YSZ） TBC by magnetron sputtering. A vacuum heat treatment was then carried out to improve the insulation property of Al-deposited TBC. Reaction mechanism of AI-ZrO2 system in AIdeposited TBC was studied by differential thermal analysis （DTA）. The phase structures of the assprayed TBC, the Al-deposited and vacuum-treated TBC were characterized. The microstructure evolution of M-deposited TBC was illustrated after vacuum heat treatment. And the insulation property of the assprayed TBC and treated TBC was compared. The results show that a multi-scaled layer, consisting of micron/ nano structured α-Al2O3 and AI3Zr grain was in situ synthesized at the top of 7YSZ coating via vacuum heat treatment. The TBC with the multi-scaled overlay has better insulation property than the asspraved TBC.

关键词： Thermal barrier coatingAl deposition Insulation propertyc α-alumina

无人机视角下的矿区水土保持研究--以本溪思山矿区为例

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山东煤炭科技 2022年第10期40卷 207-209,215页

作者：柳克松中煤科工集团沈阳设计研究院有限公司辽宁沈阳110000

为评估矿区水土保持度,保护矿区生态,提出从矿区土方量计算与土壤流失模型两个角度对矿区的水土保持度进行监测,利用倾斜摄影测量技术生成矿区数字高程模型并计算矿区土方量和坡度,引入土壤流失方程定量分析土壤侵蚀强度,对土方量计算... 详细信息

为评估矿区水土保持度,保护矿区生态,提出从矿区土方量计算与土壤流失模型两个角度对矿区的水土保持度进行监测,利用倾斜摄影测量技术生成矿区数字高程模型并计算矿区土方量和坡度,引入土壤流失方程定量分析土壤侵蚀强度,对土方量计算结果与土壤侵蚀强度值进行分析。结果表明研究对矿区生态保护有着重大意义。

关键词：水土保持数字高程模型土壤流失方程土方量

3-D shear wave velocity structure in the shallow crust of the Tan-Lu fault zone in Lujiang,Anhui,and adjacent areas,and its tectonic implications

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Earth and Planetary Physics 2020年第3期4卷 317-328页

作者： Cheng Li HuaJian Yao Yuan Yang Song Luo KangDong Wang kesong Wan Jian Wen Bin liu School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China

The Tan-Lu fault zone is a large NNE-trending fault zone in eastern China.Investigations of the structures of the fault zone and its surrounding areas have attracted much attention.In this study,we used dense-array ambient noise tomography to construct a threedimensional shear wave velocity model of shallow crust in an area about 80km×70km in Lujiang,Anhui Province,eastern China.For approximately one month we collected continuous ambient noise signals recorded by 90 short-period seismographs in the region,and obtained the short-period Rayleigh wave empirical Green's functions between stations by the cross-correlation method;we also extracted 0.5–8 s fundamental mode Rayleigh wave group velocity and phase velocity dispersion curves.Based on the direct surface wave tomography method,we jointly inverted the group velocity and phase velocity dispersion data of all paths and obtained the 3-D shear wave velocity structure in the depth range of 0–5 km.The results revealed important geological structural features of the study area.In the north region,the sedimentary center of the Hefei Basin—the southwestern part of the Chaohu Lake—shows a significant low-velocity anomaly to a depth of at least 5 km.The southwestern and southeastern regions of the array are the eastern margin of the Dabie orogenic belt and the intrusion area of Luzong volcanic rocks,respectively,and both show obvious high-speed anomalies;the sedimentary area within the Tan-Lu fault zone(about 10 km wide)shows low-velocity anomalies.However,the volcanic rock intrusion area in the fault zone is shown as high velocity.Our shallow crustal imaging results reflect the characteristics of different structures in the study area,especially the high-speed intrusive rocks in the Tan-Lu fault zone,which were probably partially derived from the magmatic activity of Luzong volcanic basin.From the Late Cretaceous to Early Tertiary,the Tan-Lu fault zone was in a period of extensional activity;the special stress environment and the fractured fault zone morphology provided

关键词： Tan-Lu fault zone Lujiang of Anhui ambient noise tomography shallow crust structure intrusive rocks