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Stable alkali halide vapor assisted chemical vapor deposition of 2D HfSe2 templates and controllable oxidation of its heterostructures

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Frontiers of physics 2024年第3期19卷 29-38页

作者： Wenlong Chu Xilong Zhou Ze Wang Xiulian Fan Xuehao Guo Cheng Li jianling yue Fangping Ouyang Jiong Zhao Yu Zhou School of Physics Hunan Key Laboratory of Nanophotonics and DevicesCentral South UniversityChangsha 410083China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing100190China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloonHong KongChina

Two-dimensional hafnium-based semiconductors and their heterostructures with native oxides have been shown unique physical properties and potential electronic and optoelectronic ***,the scalable synthesis methods for ultrathin layered hafnium-based semiconductor laterally epitaxy growth and its heterostructure are still restricted,also for the understanding of its formation ***,we report the stable sublimation of alkali halide vapor assisted synthesis strategy for high-quality 2D HfSe_(2) nanosheets via chemical vapor ***-crystalline ultrathin 2D HfSe_(2) nanosheets were systematically grown by tuning the growth parameters,reaching the lateral size of 6‒40μm and the thickness down to 4.5 *** scalable amorphous HfO_(2)and HfSe_(2)heterostructures were achieved by the controllable oxidation,which benefited from the approximate zero Gibbs free energy of unstable 2D HfSe_(2) *** crystal structure,elemental,and time dependent Raman characterization were carried out to understand surface precipitated Se atoms and the formation of amorphous Hf−O bonds,confirming the slow surface oxidation and lattice incorporation of oxygen *** relatively smooth surface roughness and electrical potential change of HfO_(2)−HfSe_(2) heterostructures indicate the excellent interface quality,which helps obtain the high performance memristor with high on/off ratio of 105 and long retention period over 9000 *** work introduces a new vapor catalysts strategy for the synthesis of lateral 2D HfSe_(2) nanosheets,also providing the scalable oxidation of the Hf-based heterostructures for 2D electronic devices.

关键词： chemical vapor deposition HfSe_(2)−HfO_(2) nanoelectronics

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多层异构复合材料的制备及吸波性能

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中国有色金属学报 2024年第5期34卷 1611-1622页

作者：张泽锋黄小忠岳建岭胡海龙中南大学航空航天技术研究院长沙410083 中南大学粉末冶金研究院长沙410083

通过模板法与物理混合法相结合,成功制备了三维网络结构的BaTiO_(3)(BTO)+Fe_(3)O_(4)三聚氰胺泡沫异质结构复合材料,采用扫描电镜和X射线衍射对复合材料样品的表面形貌和晶体结构进行了表征,并使用矢量网络分析仪测试了该样品在2~18 GH... 详细信息

通过模板法与物理混合法相结合,成功制备了三维网络结构的BaTiO_(3)(BTO)+Fe_(3)O_(4)三聚氰胺泡沫异质结构复合材料,采用扫描电镜和X射线衍射对复合材料样品的表面形貌和晶体结构进行了表征,并使用矢量网络分析仪测试了该样品在2~18 GHz频率范围内的复介电常数和复磁导率,并根据测量数据计算了反射损耗值。随后,使用COMSOL多物理场仿真软件进行有限元分析,研究了该复合体系的吸收机制和吸波性能。结果表明:成功引入了BTO和Fe_(3)O_(4)形成的大量异质界面到三维网络结构碳中,构建了异质结构。BTO和Fe_(3)O_(4)优化了三维网络结构的阻抗匹配,从而显著提高了多层异构复合材料的有效吸收带宽。此外,BTO、Fe_(3)O_(4)和三维网络碳结构构筑成了高气孔率的三维网络,导致电磁波在材料内部发生多次反射和散射,增强了电磁波与材料之间的相互作用,实现了对电磁波的吸收,提升了吸波效率。该复合材料展示了出色的吸波性能,当复合材料的厚度为2.9 mm时,最强的反射损耗值达到−54.76 dB,而当复合材料的厚度为2.7 mm时,有效吸收带宽提升至7.92 GHz。

关键词：多层异构复合材料吸波性能三维网络结构反射损耗

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氮化硼包覆碳化硅纤维表面CVD法生长碳纳米管研究

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表面技术 2024年第12期53卷 218-229,239页

作者：闫兵岳建岭邹杨君楼嘉伟杜作娟刘愚黄小忠中南大学粉末冶金研究院长沙410083 哈尔滨理工大学电气与电子工程学院哈尔滨150006

目的通过调节化学气相沉积(CVD)的工艺参数,实现碳纳米管(CNTs)在氮化硼(BN)包覆的碳化硅纤维(SiCf)表面的可控生长。方法通过控制单一变量,采用扫描电子显微镜、热重分析、X射线光电子能谱等表征手段,系统地研究了CVD工艺参数和BN表面... 详细信息

目的通过调节化学气相沉积(CVD)的工艺参数,实现碳纳米管(CNTs)在氮化硼(BN)包覆的碳化硅纤维(SiCf)表面的可控生长。方法通过控制单一变量,采用扫描电子显微镜、热重分析、X射线光电子能谱等表征手段,系统地研究了CVD工艺参数和BN表面改性对CNTs形貌、长度、含量的影响。结果通过改变CVD工艺参数,实现了对CNTs形貌、长度、含量的调节与控制,获得了CNTs和BN协同改性的SiC纤维(SiC@BN-CNTs)。其中,SiC@BN-OH在反应温度为700℃、反应时间为20 min等参数下具有最大的CNTs产率(质量分数为10.6%),且形貌良好、含量较高。结论浸渍催化剂和缩短碳源与载体的距离对生长CNTs有积极影响,增加了CNTs的长度和生长密度;通过调节反应温度和时间能够实现对CNTs长度、含量的精确控制,从而获得高质量、高结晶度的CNTs;在反应器中,气体和催化剂的含量相互影响,在制备过程中需要考虑气体和催化剂的比例,按比例同时增加气体和催化剂的流入速率能够获得更好的结果。BN表面羟基化改性处理增强了BN对催化剂的吸附,促进了催化剂颗粒的分散,提高了CNTs的产率。

关键词：六方氮化硼碳纳米管化学气相沉积工艺参数氮化硼羟基化

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Significant strain-rate dependence of sensing behavior in TiO2@carbon fibre/PDMS composites for flexible strain sensors

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Journal of Advanced Ceramics 2021年第6期10卷 1350-1359页

作者： Fan ZHANG Hailong HU Simin HU jianling yue School of Minerals Processing and Bioengineering Central South University School of Aeronautics & Astronautics Central South University Research Center in Intelligent Thermal Structures for Aerospace Central South University

Carbon fibre（CF） embedded into elastomeric media has been attracting incredible interest as flexible strain sensors in the application of skin electronics owing to their high sensitivity in a very small strain gauge. To further improve the sensitivity of CF/PDMS composite strain sensor, the relatively low temperature prepared TiO2nanowire via hydrothermal route was employed herein to functionalize *** results showed a significant increase in the sensitivity of the TiO2@CF/PDMS composite strain sensors which was reflected by the calculated gauge factor. As the prepared TiO2nanowire vertically embraced the surroundings of the CF, the introduced TiO2nanowire contributed to a highly porous structure which played a predominant role in improving the sensitivity of strain sensors. Moreover,the significant strain rate dependent behavior of TiO2@CF/PDMS strain sensor was revealed when performing monotonic tests at varied strain rate. Therefore, introducing TiO2nanowire on CF offers a new technique for fabricating flexible strain sensors with improved sensitivity for the application of flexible electronics.

关键词： composites dependence of strain rate sensitivity flexible strain sensors

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Synergy effect of regulated Li-plating and functional solid electrolyte interphase on graphite anodes

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Nano Research 2024年第9期17卷 8077-8085页

作者： Panpan Wang Baojia Xia jianling Li State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Shanghai Institute of Microsystem and Information Technology Chinese Academy of SciencesShanghai 201800China

The growth of Li dendrites poses potential safety hazard to lithium-ion batteries(LIBs),and eliminating Li dendrites thoroughly stills face tough difficulties ***,regulating Li-plating is a critical optimization-direction to address the ***,a“graphite-Li hybrid”anode with high reversibility is realized under the constant-capacity lithiation(CCL).Within CCL,the uniform distribution of Li-plating on the graphite surface is successfully *** evolution in different states of solid electrolyte interphase(SEI)is investigated in detail to study the interaction between the potentials and impedance during the process of Liintercalation and *** the potential below 0 V and the state of charge(SOC)of 110%relative to the theoretical capacity,the F-rich SEI with high stability is constructed to hinder the emergency of Li dendrites and maintain the intact structure of graphite anode under long *** cell presents more than 100%Coulombic efficiency(CE)with the 900 cycles,demonstrating the reversible Li-plating and the utilization of *** the CCL half-cell provides a good cycling performance and specific capacity of 900 cycles at 0.5 C,it is attributed to the synergy effect of stable inorganic-rich SEI and regulated active Li-plating.

关键词： "graphite-Li hybrid"anode Li-plating reversibility solid electrolyte interphase(SEI)

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How do high-voltage cathode and PEO electrolyte get along well?EIS analysis mechanism&potentiometric control strategy

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Journal of Energy Chemistry 2024年第9期96卷 424-436页

作者： Xiaodong Bai Chaoliang Zheng Heng Zhang Jian Liu Panpan Wang Baojia Xia jianling Li State Key Laboratory of Advanced Metallurgy University of Science1nd Technology BeijingBeijing 100083China Shanghai Institute of Microsystem1nd Information Technology Chinese Academy of SciencesShanghai 201800China

PEO-based all-solid-state electrolytes are extensively utilized and researched owing to their exceptional safety,low-mass-density,and ***,the low oxidation potential of PEO makes the interface problem with the high-voltage cathode extremely *** this work,the impedance of PEO-based all-solid-state batteries with high-voltage cathode(NCM811)was studied at different *** Nyquist plots displayed a gyrate arc at low-frequencies for NCM811/PEO *** on the kinetic modeling,it was deduced that there is a decomposition reaction of PEO-matrix in addition to de-embedded reaction of NCM811,and the PEO intermediate product(dehydra-PEO)adsorbed on the electrode surface leading to low-frequency inductive ***,the distribution of relaxation time shows the dehydra-PEO results in the kinetic tardiness of the charge transfer process in the temporal ***,an artificial interface layer(CEI_(x))was modified on the surface of NCM811 to regulate the potential of cathode/electrolyte interface to prevent the high-voltage deterioration of ***/CEI_(x)/PEO batteries exhibit capacity retentions of 96.0%,84.6%,and 76.8%after undergoing 100 cycles at cut-off voltages of 4.1,4.2,and 4.3 V,***,here the failure mechanism of high-voltage PEO electrolyte is investigated by EIS and a proposed solving strategy is presented.

关键词： PEo-based electrolyte High-voltage cathode Electrochemical impedance spectroscopy Mechanism research Electrochemical characteristic

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柔性纳米复合材料压阻式应变传感器的研究进展

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复合材料学报 2022年第1期39卷 1-22页

作者：胡海龙马亚伦张帆岳建岭罗世彬中南大学航空航天学院长沙410083 空天智能热结构研究中心长沙410083 中南大学资源加工与生物工程学院长沙410083 中南大学粉末冶金学院长沙410083

柔性纳米复合材料,由于其优异的传感性能、良好的延展性,在压阻式应变传感器方面,受到研究者们不断的关注,主要应用于智能可穿戴,结构健康监测等领域。本文主要从结构设计、制备方法、应用前景三方面,综述了近年来国内外对复合材料压阻... 详细信息

柔性纳米复合材料,由于其优异的传感性能、良好的延展性,在压阻式应变传感器方面,受到研究者们不断的关注,主要应用于智能可穿戴,结构健康监测等领域。本文主要从结构设计、制备方法、应用前景三方面,综述了近年来国内外对复合材料压阻式应变传感器在材料选取及结构设计下传感器性能的研究成果及研究进展。首先分析了压阻式传感器的性能参数和传感机制,其次围绕材料优化选取-工艺选择与结构设计-性能与具体应用的主线,进行了深入的讨论与性能分析。由于复合材料传感器的微观导电网络结构与介观层状结构协同主导着传感性能的演变,采用有限元模拟理论与人工智能算法,对传感器的导电网络结构(形成、搭接、演化)、多尺度层状结构设计等方面进行了传感性能的调控与机制分析。最后本文探讨了柔性压阻式传感器的多功能化、信号鉴别与分离、高稳定性与低迟滞性等依然亟需突破与提升的问题,并同时总结了目前复合材料压阻式应变传感器研究工作中的重点及未来的发展方向。

关键词：柔性应变传感器纳米复合材料人工智能有限元分析多功能化

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重复式电缆地层测试器常见故障处理方法分析

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石化技术 2023年第3期30卷 147-149页

作者：岳建灵广东南油服务股份有限公司天津分公司天津300457

本文根据测试器基本原理和实际情况对问题原因进行综合分析,提出相应的解决办法及预防措施对其优化。选择采用RFT分阶段维护保养,收集相关的现场数据,对情况复杂井采取应对性措施等,取得显著效果。

关键词：测试器地质层性质评价综合分析措施效果

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The Application of Embodied Cognitive Linguistics in the English Translation of Two-Part Allegorical Saying—An Analysis of Examples From A Dream of Red Mansions

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Sino-US English Teaching 2024年第7期21卷 337-342页

作者： HE Jiamei ZOU jianling University of Shanghai for Science and Technology ShanghaiChina

As a kind of widely circulated folk language,two-part allegorical saying(“xiehouyu”)carries the wisdom of the Chinese people and is characterized with humor and vivid *** the two English translation versions of A Dream of Red Mansions as examples,this paper analyzes the English translation of two-part allegorical saying based on the core principle of Embodied Cognitive Linguistics(ECL),“Reality-Cognition-Language”,and explores how the English translation of two-part allegorical saying reflects the three dimensions of ECL.

关键词： two-part allegorical saying A Dream in Red Mansions Embodied Cognitive Linguistics translation

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Continuous Production of Formic Acid Solution from Electrocatalytic CO_(2) Reduction Using Mesoporous Bi_(2)O_(3) Nanosheets as Catalyst

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CCS Chemistry 2024年第1期6卷 100-109页

作者： Zhonghao Tan jianling Zhang Yisen Yang Jiajun Zhong Yingzhe Zhao Jingyang Hu Yanyue Wang Zhuizhui Su Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of ColloidInterface and Chemical ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049 Beijing Synchrotron Radiation Facility(BSRF) Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049

Electrochemical reduction of CO_(2) to formic acid(HCOOH)is an important route for storing renewable energy and achieving carbon ***,we propose the continuous production of HCOOH solution from electrocatalytic CO_(2) reduction using highly mesoporous bismuth oxide(Bi_(2)O_(3))nanosheets as an electrocatalyst and membrane electrode assembly with solid-state electrolyte as an ***,0.1 M of HCOOH solution could be produced continuously at a current density of -56 mA cm^(-2) for at least 43 *** underlying mechanism for the high performance of the electrocatalytic system was investigated by experimental studies and theoretical calculations.

关键词： CO_(2)electroreduction formic acid Bi_(2)O_(3)nanosheet solid-state electrolyte Zn-CO_(2)battery

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