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Phase-pure two-dimensional Fe_(X)GeTe_(2) magnets with near-room-temperature Tc

Nano Research 2022年第1期15卷 457-464页

作者： Govindan Kutty Rajendran Nair Zhaowei Zhang Fuchen Hou§ Ali Abdelaziem Xiaodong Xu Steve Wu Qing Yang Nan Zhang Weiqi Li Chao Zhu Yao Wu Heng Weiling lixing kang Teddy Salim Jiadong Zhou Lin Ke Junhao Lin Xingji Li Weibo Gao Zheng Liu School of Material Science and Engineering 50 Nanyang Ave639798Singapore Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological University21 Nanyang Link637371 Singapore Department of Physics Southern University of Science and TechnologyShenzhen 518055China Institute of Materials Research and Engineering Agency for Science Technology and Research(A*STAR)2 Fusionopolis WaySingapore 138634Singapore School of Material Science and Engineering School of PhysicsHarbin Institute of TechnologyHarbin 150001China Shenzhen Key Laboratory of for Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen 518055China National Institute of Laser Enhanced Sciences(NILES) Cairo UniversityGiza 12613Egypt CINTRA CNRS/NTU/THALES UMI3288Research Techno Plaza637553Singapore School of Electrical and Electronic Engineering Nanyang Technological University50 Nanyang Ave639798Singapore

Two-dimensional(2D)ferromagnets with out-of-plane(OOP)magnetic anisotropy are potential candidates for realizing the next-generation memory devices with ultra-low power consumption and high storage density.However,a scalable approach to synthesize 2D magnets with OOP anisotropy directly on the complimentary metal-oxide semiconductor(CMOS)compatible substrates has not yet been mainly explored,which hinders the practical application of 2D magnets.This work demonstrates a cascaded space confined chemical vapor deposition(CS-CVD)technique to synthesize 2D FexGeTe_(2) ferromagnets.The weight fraction of iron(Fe)in the precursor controls the phase purity of the as-grown FexGeTe2.As a result,high-quality Fe_(3)GeTe_(2) and Fe_(5)GeTe_(2) flakes have been grown selectively using the CS-CVD technique.Curie temperature(Tc)of the as-grown FexGeTe2 can be up to-280 K,nearly room temperature.The thickness and temperature-dependent magnetic studies on the Fe_(5)GeTe_(2) reveal a 2D Ising to 3D XY behavior.Also,Terahertz spectroscopy experiments on Fe_(5)GeTe_(2) display the highest conductivity among other FexGeTe_(2) 2D magnets.The results of this work indicate a scalable pathway for the direct growth and integration of 2D ternary magnets on CMOS-based substrates to develop spintronic memory devices.

关键词： cascaded space confined chemical vapor deposition(CVD) van der Waals(vdW) ferromagnetism out of plane anisotropy iron germanium telluride terahertz

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Large-area growth of ultra-high-density single-walled carbon nanotube arrays on sapphire surface

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Nano Research 2015年第11期8卷 3694-3703页

作者： lixing kang Yue Hu Hua Zhong Jia Si Shuchen Zhang Qiuchen Zhao Jingjing Lin Qingwen Li Zhiyong Zhang Lianmao Peng Jin Zhang Division ofAdvanced Nanomaterials Suzhou Institute of Nanotech and Nanobionics Chinese Academy of Sciences Suzhou 215123 China Center for Nanochemistry Beijing Science and Engineering Technology Research Center for Low Dimensional Carbon Materials College of Chemistry and Molecular Engineering Peking University Beijing 100871 China University of ChineseAcademy of Sciences Beijing 100049 China 4 Key Laboratory for the Physics and Chemistry of Nanodevices Department of Electronics Peking University Beijing 100871 China Key Laboratory for the Physics and Chemistry of Nanodevices Department of Electronics Peking University Beijing 100871 China

获得高密度的、大区域的围单人赛的碳 nanotube (SWNT ) 的可伸缩的途径穿的 A 为在实际电子设备认识到 SWNT 的完整的潜力是必要的；这仍然是大挑战。这里，我们由联合特洛伊催化剂在蓝宝石表面上为 ultra-high-density SWNT 数组的大... 详细信息

获得高密度的、大区域的围单人赛的碳 nanotube (SWNT ) 的可伸缩的途径穿的 A 为在实际电子设备认识到 SWNT 的完整的潜力是必要的；这仍然是大挑战。这里，我们由联合特洛伊催化剂在蓝宝石表面上为 ultra-high-density SWNT 数组的大区域的生长报导一个改进合成方法(免除了底层，保证超离频密度) 与瞬间 nanoparticles (在表面上装载了，稳定释放特洛伊催化剂) 作为合作催化剂。稠密、非常排列的 SWNT 盖住全部底层，本地密度象 160 tubes/m 一样高。在如此的数组上造的地效果晶体管(联邦货物税) 在排水管来源电压给了 488 A/m 的产量电流密度(V ds )= 门来源电压(V gs )=2 V，相应于在传导力上每 244 S/m 的宽度。这些结果在 SWNT 的控制结构的生长证实特洛伊瞬间催化剂的潜在的应用的宽范围。

关键词：单壁碳纳米管碳纳米管阵列超高密度可控生长蓝宝石表面面积催化剂结构

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2D/2D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core nanosheets with ultrafast interfacial charge transfer for boosting photocatalytic H_(2)evolution

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Chinese Chemical Letters 2021年第10期32卷 3128-3132页

作者： Bo Lin Hao Chen Yao Zhou Xiao Luo Dan Tian Xiaoqing Yan Ruihuan Duan Jun Di lixing kang Aimin Zhou Guidong Yang Yonghui Li Jiadong Zhou Zheng Liu Fucai Liu School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Wuhan Second Ship Design and Research Institute Wuhan 430200China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore 637371Singapore College of Materials Science and Engineering Co-Innovation Center of Efficient Processing and Utilization of Forest ResourcesNanjing Forestry UniversityNanjing 210037China XJTU-Oxford International Joint Laboratory for Catalysis School of Chemical Engineering and TechnologyXi'an Jiaotong UniversityXi’an 710049China School of Materials Science and Engineering Nanyang Technological UniversitySingapore 639798Singapore Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of ScienceTianjin UniversityTianjin 300350China Key Lab of Advanced Optoelectronic Quantum Architecture and Measurement(Ministry of Education) Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systemsand School of PhysicsBeijing Institute of TechnologyBeijing 100081China

Low-efficiency charge transfer is a critical factor to limit the photocatalytic H_(2)evolution activity of semiconductor photocatalysts.The interface design is a promising approach to achieve high chargetransfer efficiency for photocatalysts.Herein,a new 2 D/2 D atomic double-layer WS_(2)/Nb_(2)O_(5)shell/core photocatalyst(DLWS/Nb_(2)O_(5))is designed.The atom-resolved HAADF-STEM results unravel the presence of an unusual 2 D/2 D shell/core interface in DLWS/Nb_(2)O_(5).Taking advantage of the advanced femtosecond-resolved ultrafast TAS spectra,the average lifetime of charge carriers for DLWS/Nb_(2)O_(5)(180.97 ps)is considerably shortened as compared to that of Nb_(2)O_(5)(230.50 ps),strongly indicating that the 2 D/2 D shell/core interface enables DLWS/Nb_(2)O_(5)to achieve ultrafast charge transfer from Nb_(2)O_(5)to atomic double-layer WS_(2),thus yielding a high photocatalytic H_(2)evolution rate of 237.6 mmol/h,up to10.8 times higher than that of pure Nb_(2)O_(5)nanosheet.This study will open a new window for the development of high-efficient photocatalytic systems through the interface design.

关键词： 2D/2D shell/core interface Atomic double-layer WS_(2) Nb_(2)O_(5)nanosheet Charge transfer Photocatalytic H_(2)evolution

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Enhancing the cycling stability of Na-ion batteries by bonding MoS2 on assembled carbon-based materials

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Nano Materials Science 2019年第4期1卷 310-317页

作者： Pin Song Jun Di lixing kang Manzhang Xu Bijun Tang Jun Xiong Jiewu Cui Qingsheng Zeng Jiadong Zhou Yongmin He Qundong Fu Juan Peng Shasha Guo Bo Lin Jingyu Zhang Peng Meng Zheng Liu School of Materials Science&Engineering Nanyang Technological UniversitySingapore639798Singapore Institute for Energy Research Jiangsu University301 Xuefu RoadZhenjiang212013China School of Materials Science and Engineering Hefei University of TechnologyHefei230009China Stage Key Laboratory of High-efficiency Coal Utilization and Green Chemical Engineering School of Chemistry and Chemical EngineeringNingxia UniversityYinchuan750021China

Room temperature Na-ion batteries(SIBs) show great potential for use as renewable energy storage systems.However, the large-scale application of SIBs has been hindered by the lack of an ideal SIBs anode material. We synthesized MoS2 on carbonized graphene-chitosan(G-C) using the hydrothermal method. The strong interaction between the MoS2 and the G-C greatly improved the electron transport rate and maintained the structural stability of the electrode, which lead to both an excellent rate capability and long cycle stability. The G-C monolith was proven to enhance the electrical conductivity of the composites and served as a matrix for uniformly dispersing active MoS2 nanosheets(NSs), as well as being a buffer material to adapt to changes in volume during the cycle.Serving as an anode material for SIBs, the MoS2-G-C electrode showed good cycling stability(527.3mAh g-1 at100 m A g-1 after 200 cycles), excellent rate capability, and a long cycle life(439.1 m Ah g-1 at 1 A g-1 after 200 cycles).

关键词： Na-ion batteries Carbon-based materials MoS2 Long cycle life

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Space-confined microwave synthesis of ternary-layered BiOCl crystals with high-performance ultraviolet photodetection

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InfoMat 2020年第3期2卷 593-600页

作者： lixing kang Xuechao Yu Xiaoxu Zhao Qingling Ouyang Jun Di Manzhang Xu Dan Tian Weiliang Gan Calvin CIAng Shoucong Ning Qundong Fu Jiadong Zhou R.G.Kutty Ya Deng Pin Song Qingsheng Zeng Stephen J.Pennycook Jun Shen Ken-T.Yong Zheng Liu School of Materials Science and Engineering Nanyang Technological UniversitySingapore CINTRA CNRS/NTU/THALES Singapore Centre for OptoElectronics and Biophotonics School of Electrical and Electronic EngineeringNanyang Technological UniversitySingapore School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore Department of Materials Science and Engineering National University of SingaporeSingapore Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqingChina

In recent years,two-dimensional(2D)ternary materials have attracted wide attention due to their novel properties which can be achieved by regulating their chemical composition with a very great degree of freedom and adjustable space.However,as for the precise synthesis of 2D ternary materials,great challenges still lie ahead that hinder their further development.In this work,we demonstrated a simple and reliable approach to synthesize 2D ternary-layered BiOCl crystals through a microwave-assisted space-confined process in a short time(<3 minutes).Their ultraviolet(UV)detection performance was analyzed systematically.The photodetectors based on the as-obtained BiOCl platelets demonstrate high sensitivity to 266-nm laser illumination.The responsivity is calculated to be8 A/W and the response time is up to be18 ps.On the other hand,the device is quite stable after being exposed in the ambient air within 3 weeks and the response is almost unchanged during the measurement.The facile and fast synthesis of single crystalline BiOCl platelets and its high sensitivity to UV light irradiation indicate the potential optoelectronic applications of 2D BiOCl photodetectors.

关键词： 2D materials bismuth oxyhalide microwave synthesis UV photodetector

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Enhanced identification and localization of metabolites in Scutellariae Radix using ion mobility enabled MALDI-Q-TOF/MS imaging

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Journal of Pharmaceutical Analysis 2024年第2期14卷 284-286页

作者： lixing Nie Lieyan Huang Xiaofei Jia Shuai kang Lingwen Yao Yanpei Wu Hao Yuan Yongli Liu Feng Wei Hongyu Jin Xiang Li Shuangcheng Ma National Institutes for Food and Drug Control Beijing102629China Chinese Academy of Medical Science and Peking Union Medical College Beijing100006China Waters Corporation Beijing102600China Hebei Institute for Drug and Medical Device Control Shijiazhuang050227China Department of Pharmacy Medical Supplies Center of the PLA General HospitalBeijing100853China

Unraveling the distribution of metabolites in traditional Chinese medicine(TCM)provides direct indications for understanding their regulatory and functional basis,which is of paramount significance for better utilization and quality control of medicinal plants[1].Recently,imaging techniques such as near-infrared spectroscopy,Raman spectroscopy,and mass spectrometry(MS)were explored to reveal the spatial context of component accumulation and localization[2,3].

关键词： medicine(TCM) Radix Scutellaria

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无定型NiCoS_(x)纳米片在多孔碳基纳米纤维表面的原位可控形成及其超级电容性能研究

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Science China Materials 2023年第9期66卷 3484-3492页

作者：张振渊王健朱兆媛马翔房宽峻王策康黎星潘争辉乜广弟 Collaborative Innovation Center for Eco-Textiles of Shandong Province and the Ministry of Education College of Textiles and ClothingQingdao UniversityQingdao 266071China School of Materials Science and Engineering Tongji UniversityShanghai 201804China Alan G.MacDiarmid Institute College of ChemistryJilin UniversityChangchun 130012China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China

近年来,导电碳基质与过渡金属硫化物(TMS)的巧妙结合在超级电容器中取得了一系列的研究进展.然而,在长期的充/放电过程中,这些复合物在异质界面处较弱的兼容性和结合力通常导致TMS的剥离和电极容量的衰减.基于此,本文设计了一种简单且... 详细信息

近年来,导电碳基质与过渡金属硫化物(TMS)的巧妙结合在超级电容器中取得了一系列的研究进展.然而,在长期的充/放电过程中,这些复合物在异质界面处较弱的兼容性和结合力通常导致TMS的剥离和电极容量的衰减.基于此,本文设计了一种简单且可扩展的原位硫化方法,用于构建稳定的超级电容器电极,其中多孔NiCo/C纳米纤维作为核芯,无定形NiCoS_(x)纳米片作为壳层,形成NiCo/C@NiCoS_(x)(CNCS)分级核壳结构.外部NiCoS_(x)纳米片的质量负载和尺寸在很大程度上取决于内部NiCo/C纳米纤维的碳化温度.优化后的CNCS电极表现出优异的比容量和良好的倍率性能.组装的非对称超级电容器具有突出的能量密度和较高的循环稳定性.这种调节异质界面的原位策略有望用于开发稳定的基于TMS的复合电极.

关键词：过渡金属硫化物纳米纤维纳米片超级电容器无定形能量密度多孔碳异质界面

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紫苏叶与白苏叶的性状与显微鉴别研究

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中国药学杂志 2024年第11期59卷 990-997页

作者：王馨平聂黎行张毅康帅马双成河北中医药大学药学院河北省中药炮制技术创新中心石家庄050200 中国食品药品检定研究院北京100050 重庆市食品药品检验检测研究院重庆401121

目的探究紫苏叶的性状和显微鉴别特征,为鉴别不同生长期紫苏叶、鉴别紫苏叶与白苏叶提供依据。方法采用性状鉴别法、显微鉴别法进行对比研究,对幼苗期、营养生长期、生殖生长期共6批紫苏叶与白苏叶进行系统的性状及显微鉴别研究。结果... 详细信息

目的探究紫苏叶的性状和显微鉴别特征,为鉴别不同生长期紫苏叶、鉴别紫苏叶与白苏叶提供依据。方法采用性状鉴别法、显微鉴别法进行对比研究,对幼苗期、营养生长期、生殖生长期共6批紫苏叶与白苏叶进行系统的性状及显微鉴别研究。结果对不同生长期紫苏叶的叶脉横切特征进行总结,发现不同生长期紫苏叶的叶脉横切面中,呈现紫色的部位面积有所不同,且不同生长期紫苏叶叶脉横切面的荧光表征也不相同,这些现象可用于鉴别不同生长期的紫苏叶。随后,本实验对紫苏叶与其伪品白苏叶的显微差异展开研究。发现紫苏叶与白苏叶的叶表面细胞纹饰存在差异,紫苏叶上表面细胞纹理有螺纹状细胞纹饰,白苏叶的上表面细胞有条状褶皱细胞纹饰;此外,紫苏叶与白苏叶头状、盾状腺毛密度及气孔指数比(下/上表面)的数值有所不同。结论本实验通过研究紫苏叶与白苏叶的性状与显微特征,探索了鉴别不同生长期紫苏叶、鉴别紫苏叶与其伪品白苏叶的方法,实验结果可为紫苏叶的监督检验、临床使用和标准修订提供参考。

关键词：紫苏叶白苏叶性状鉴别显微鉴别

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PtSe_(2)薄膜的时间分辨太赫兹光谱特性研究(特邀)

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光子学报 2021年第8期50卷 92-99页

作者：戴子杰康黎星龚诚刘政刘伟伟南开大学现代光学研究所天津300350 天津市微尺度光学信息技术科学重点实验室天津300350 南洋理工大学材料科学与工程学院新加坡639798 江苏大学微纳光电子与太赫兹技术研究院江苏镇江212013

基于时间分辨太赫兹光谱技术,研究了不同厚度的二硒化铂(PtSe2)薄膜在太赫兹波段的光学特性。实验结果表明,当泵浦光功率从0增强至2540μJ/cm2时,11 nm-PtSe2薄膜的电导率逐渐增大,透射太赫兹信号强度减小;而197 nm-PtSe2薄膜的电导率... 详细信息

基于时间分辨太赫兹光谱技术,研究了不同厚度的二硒化铂(PtSe2)薄膜在太赫兹波段的光学特性。实验结果表明,当泵浦光功率从0增强至2540μJ/cm2时,11 nm-PtSe2薄膜的电导率逐渐增大,透射太赫兹信号强度减小;而197 nm-PtSe2薄膜的电导率逐渐减小,透射太赫兹信号强度增大。由此构造的光控太赫兹调制器件的调制速度约为14 ps,工作带宽为0.2-1.8 THz,调制深度为15%-35%。研究证明PtSe2薄膜材料在高速光控太赫兹器件领域具有应用潜力。

关键词：太赫兹时间分辨超快二硒化铂太赫兹调制

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碳纳米管阵列的可控生长及应用

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科学通报 2014年第33期59卷 3264-3279页

作者：康黎星邸江涛张永毅李清文中国科学院苏州纳米技术与纳米仿生研究所苏州215123 中国科学院大学北京100049

取向阵列结构是碳纳米管聚集体中的一种重要形式,可以通过化学气相沉积(CVD)技术可控制备,是实现碳纳米管结构与性能从微观向宏观跨越的重要桥梁.本文综述了近期碳纳米管阵列(包括水平阵列和垂直阵列)的制备技术进展,以及它们在纳电子... 详细信息

取向阵列结构是碳纳米管聚集体中的一种重要形式,可以通过化学气相沉积(CVD)技术可控制备,是实现碳纳米管结构与性能从微观向宏观跨越的重要桥梁.本文综述了近期碳纳米管阵列(包括水平阵列和垂直阵列)的制备技术进展,以及它们在纳电子器件、高性能纤维、功能薄膜与器件、能源存储等领域的应用现状,并对碳纳米管阵列制备与应用仍然面临的一些关键问题以及未来潜在的发展方向进行了分析和展望.

关键词：碳纳米管阵列可控生长场效应晶体管碳纳米管纤维取向碳纳米管薄膜

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