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MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

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Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen Wang Wei Ming Longfu Chen Tianliang Song Moxi Yele Hao Zhang Long Yang Gegen Sarula Benliang Liang luting Yan Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

Electrodes for Li-ion batteries: From high-voltage LiCoO_(2) to Coreduced /Co-free layered oxides with potential anodes

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Nano Research 2023年第12期16卷 12983-13007页

作者： luting Song Weiguo Chu Nanofabrication Laboratory National Center for Nanoscience and TechnologyBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Li-ion batteries(LIBs)are one type of more and more widely used devices for energy storage and power supply in which cathode materials are playing a relatively more decisive role at current *** this review,we start with pioneeringly commercialized R¯3mLiCoO_(2)(LCO)with a layered rhombohedral structure(space group)to discuss novel sequentially emerging LCO-derived layered oxides from the perspectives of both cobalt content reduction and performance *** is placed on the improvement of high-voltage performance of LCO and Co-reduced/free layered oxides,including Co-reduced high-nickel layered oxides,Co-free Li-rich layered oxides,and Ni-based layered oxides cathodes,and their underlying mechanisms via different ***,possibly matched carbon and silicon-based anode materials are briefly *** common issues and prospects of the layered oxides cathodes and their potential anodes are summarized and commented *** review can help understand the emergence logics of novel layered oxides with gradually vanishing cobalt involved,provide insights about the underlying mechanisms of performance enhancement pertaining to particular strategies,and even inspire the discovery of novel cathode materials with high performance and low cost.

关键词： Li-ion batteries cathodic materials anode materials high-voltage LiCoO_(2) Co-reduced/free layered oxides

Genomes and evolutionary genomics of animals

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Current Zoology 2013年第1期59卷 87-98页

作者： luting SONG Wen WANG State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kun-ming Yunnan 650223 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Alongside recent advances and booming applications of DNA sequencing technologies, a great number of complete genome sequences for animal species are available to researchers. Hundreds of animals have been involved in whole genome se- quencing, and at least 87 non-human animal species＇ complete or draft genome sequences have been published since 1998. Based on these technological advances and the subsequent accumulation of large quantity of genomic data, evolutionary genomics has become one of the most rapidly advancing disciplines in biology. Scientists now can perform a number of comparative and evolu- tionary genomic studies for animals, to identify conserved genes or other functional elements among species, genomic elements that confer animals their own specific characteristics and new phenotypes for adaptation. This review deals with the current ge- nomic and evolutionary research on non-human animals, and displays a comprehensive landscape of genomes and the evolution- ary genomics of non-human animals. It is very helpful to a better understanding of the biology and evolution of the myriad forms within the animal kingdom [Current Zoology 59 （1）： 87-98, 2013].

关键词： Animals Genome Evolutionary genomics

Hybrid CuO-Co_(3)O_(4)nanosphere/RGO sandwiched composites as anode materials for lithium-ion batteries

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Chinese Journal of Chemical Engineering 2022年第7期35卷 185-192页

作者： Yingmeng Zhang luting Liu Qingwei deng Wanlin Wu Yongliang Li Xiangzhong Ren Peixin Zhang Lingna Sun College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China

Hybrid CuO-Co_(3)O_(4)nanosphere building blocks have been embedded between the layered nanosheets of reduced graphene oxides with a three dimensional(3D)hybrid architecture(CuO-Co_(3)O_(4)-RGO),which are successfully applied as enhanced anodes for lithium-ion batteries(LIBs).The CuO-Co_(3)O_(4)-RGO sandwiched nanostructures exhibit a reversible capacity of~847 mA·h·g^(-1)after 200 cycles’cycling at 100 mA·g^(-1)with a capacity retention of 79%.The CuO-Co_(3)O_(4)-RGO compounds show superior electrochemical properties than the comparative CuO-Co_(3)O_(4),Co_(3)O_(4)and CuO anodes,which may be ascribed to the following reasons:the hybridizing multicomponent can probably give the complementary advantages;the mutual benefit of uniformly distributing nanospheres across the layered RGO nanosheets can avoid the agglomeration of both the RGO nanosheets and the CuO-Co_(3)O_(4) nanospheres;the 3D storage structure as well as the graphene wrapped composite could enhance the electrical conductivity and reduce volume expansion effect associated with the discharge-charge process.

关键词： Composites Nanostructure Nanoparticles Reduced graphene oxide Metal oxides Lithium ion batteries

Theory for frequent measurements of spontaneous emissions in a non-Markovian environment: Beyond the Lorentzian spectrum

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Science China(Physics,Mechanics & Astronomy) 2019年第8期62卷 46-54页

作者： luting Xu Xin-Qi Li Center for Joint Quantum Studies School of Science Tianjin University

The measurement-result-conditioned evolution of a system(e.g., an atom) with spontaneous emissions of photons is described by the quantum trajectory(QT) theory. In this work we generalize the associated QT theory from an infinitely wide bandwidth Markovian environment to the finite bandwidth non-Markovian environment. In particular, we generalize the treatment for an arbitrary spectrum, which is not restricted by the specific Lorentzian case. We rigorously prove the general existence of a perfect scaling behavior jointly defined by the bandwidth of the environment and the time interval between successive photon *** a couple of examples, we obtain analytic results to facilitate the QT simulations based on the Monte-Carlo algorithm. For the case where the analytical result is not available, a numerical scheme is proposed for practical simulations.

关键词： quantum measurement quantum trajectory Zeno effect non-Markovian environment

Effect of Meridional Characteristic Angle on Aerodynamic Performance of Ram-Rotor

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Journal of Thermal Science 2020年第3期29卷 753-762页

作者： HAN Ji'ang GUAN Jian ZHONG Jingjun CHEN luting Naval Architecture and Ocean Engineering College Dalian Maritime UniversityDalian 116026China Merchant Marine College Shanghai Maritime UniversityShanghai 201306China

A kind of meridional concept which has a shape of contraction-expansion(Con-Exp)was applied to the ram-rotor in the paper,and detailed numerical simulation to understand the impact of meridional shape and geometric characteristic angle on the aerodynamic behavior of ram-rotors has been *** to baseline,there was a positive effect in intensifying shock train and suppressing low momentum fluid in Con-Exp scheme,and the pressure ratio and efficiency of Con-Exp scheme increased by 2.075%and 3.160%,*** the contracting angle was increasing,supersonic flow at and after throat region accelerated remarkably,and the static pressure rise was decreased *** terminating shock train was transformed to terminating shock,and the efficiency of ram-rotor was unfavorable to improve due to low throttle *** expanding angle rose,the terminating shock moved forward and turned to shock train *** pressure rise capacity and throttling ability of ram-rotor were *** low momentum fluid was accumulated near the middle and upper flow-path,yielding greater flow loss at large expanding angle.

关键词： ram-rotor meridional shape contracting angle expanding angle numerical simulation

Band structures of strained kagome lattices

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Chinese Physics B 2024年第2期33卷 456-463页

作者：徐露婷杨帆 Center for Joint Quantum Studies and Department of Physics School of ScienceTianjin UniversityTianjin 300354China Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology Department of PhysicsTianjin UniversityTianjin 300354China

Materials with kagome lattices have attracted significant research attention due to their nontrivial features in energy *** theoretically investigate the evolution of electronic band structures of kagome lattices in response to uniaxial strain using both a tight-binding model and an antidot model based on a periodic muffin-tin *** is found that the Dirac points move with applied ***,the flat band of unstrained kagome lattices is found to develop into a highly anisotropic shape under a stretching strain along y direction,forming a partially flat band with a region dispersionless along ky direction while dispersive along kx *** results shed light on the possibility of engineering the electronic band structures of kagome materials by mechanical strain.

关键词： kagome lattice strain band structure engineering

Multimodal bioimaging based on gold nanorod and carbon dot nanohybrids as a novel tool for atherosclerosis detection

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Nano Research 2018年第3期11卷 1262-1273页

作者： Xiaojing Liu luting Liu Xiujie Hu Shuyun Zhou Rinat Ankri Dror Fixler Zheng Xie Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Faculty of Engineering and Institute of Nanotechnology and Advanced Materials Bar-Ilan University Ramat-Gan 52900 Israel

Advanced biocompatible and robust platforms equipped with diverse properties are highly required in biomedical imaging applications for the early detection of atherosclerotic vascular disease and cancers. Designing nanohybrids composed of noble metals and fluorescent materials is a new way to perform multimodal imaging to overcome the limitations of single-modality counterparts. Herein, we propose the novel design of a multimodal contrast agent; namely, an enhanced nanohybrid comprising gold nanorods （GNRs） and carbon dots （CDs） with silica （SiO2） as a bridge. The nanohybrid （GNR@SiO2@CD） construction is based on covalent bonding between SiO2 and the silane-functionalized CDs, which links the GNRs with the CDs to form typical core-shell units. The novel structure not only retains and even highly improves the optical properties of the GNRs and CDs, but also possesses superior imaging performance in both diffusion reflection （DR） and fluorescence lifetime imaging microscopy （FLIM） measurements compared with bare GNRs or fluorescence dyes and CDs. The superior bioimaging properties of the GNR@SiOa@CD nanohybrids were successfully exploited for in vitro DR and FLIM measurements of macrophages within tissue-like phantoms, paving the way toward a theranostic contrast agent for atherosclerosis and cancer.

关键词： nanohybrids multimodal imagingcontrast agent diffusion reflection fluorescence lifetimeimaging atherosclerosis macrophages

Data Service: Characteristics, Market Structure, and the Role of Operator

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The Journal of China Universities of Posts and Telecommunications 2005年第1期12卷 107-112页

作者： LIRuo-peng luting-jie SchoolofManagementandEconomics BeijingUniversityofPostsandTelecommunicationsBeijing100876P.R.China

To study characteristics and market structure of data service and the role ofoperator, this paper makes a commercial model by applying the theory of intermediaries andneoclassic economics. Data service has different economic characteristics from voice ***, production mode of data service is roundabout production, secondly, driving power of dataservice is economies of specialization, and finally, management method of data service is impersonalmanagement. In data service market, information asymmetry and barrier to entry determinetransaction efficiency and the specialization level of service providers indirectly. Therefore,operator should intervene in the market by offering trade service in order to promote development ofservice providers. Because of different quality of service providers, market structure of dataservice must be the state that trade platform built by operator and intermediary platform built byoperator coexists.

关键词： data service roundabout production economies of specialization marketstructure intermediary