检索结果-内蒙古大学图书馆

Direct Observation of Early-Stage Polymer Crystallization Driven by Surface Wrinkling and Compressive Stress in Thin Films

引用

Chinese Journal of Polymer science 2025年第2期43卷 360-367页

作者： Peng Zhang Stephan V.Roth Peter Muller-Buschbaum Tian-Bai He School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationInstitute of Green Chemistry and Molecular EngineeringSun Yat-sen UniversityGuangzhou510275China Deutsches Elektronen-Synchrotron(DESY) Notkestrasse 8522607HamburgGermany Department of Fibre and Polymer Technology KTH Royal Institute of TechnologyTeknikringen 56-58StockholmSE-10044Sweden TUM School of Natural Sciences Department of PhysicsChair for Functional MaterialsTechnical University of MunichJames-Franck-Str.1Garching85748Germany Heinz Maier-Leibnitz-Zentrum(MLZ) Technical University of MunichLichtenbergstr.1Garching85748Germany State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryGraduate University of Chinese Academy of SciencesChinese Academy of SciencesChangchun130022China

The early stages of crystallization and occurrence of surface wrinkling were investigated using poly(butadiene)-block-poly(ε-caprolactone)with an ordered lamellar *** evidence has demonstrated that surface wrinkling precedes nucleation and crystal *** study examined the relationship between surface wrinkling,nucleation,and the formation of crystalline supramolecular structures using atomic force microscopy(AFM)and X-ray scattering *** wrinkling is attributed to curving induced by accumulated stresses,including residual stress from the sample preparation and thermal stress during *** stresses cause large-scale material flow and corresponding changes in the molecular conformations,potentially reducing the nucleation *** hypothesis is supported by the rapid crystal growth observed following the spread of surface ***,the surface curving of the polymer thin film creates local minima of the free energy,facilitating *** nuclei subsequently grow into crystalline supramolecular structures by incorporating polymer molecules from the *** mechanism highlights the role of localized structural inhomogeneity in the early stages of crystallization and provides new insights into structure formation processes.

关键词： Polymer crystallization Nucleation Surface wrinkling Stress Thin film

来源：评论

学校读者我要写书评

暂无评论

Elevating kinetics of passivated Fe anodes with NH_(4)Cl regulator:Toward low-cost,long-cyclic and green cathode-free Fe-ion aqueous batteries

引用

Nano Research 2022年第4期15卷 3187-3194页

作者： Shibo Chai Jianhui Zhu Jian Jiang Chang Ming Li School of Physical Science and Technology Southwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China School of Materials and Energy and Chongqing Key Lab for Advanced Materials and Clean Energies of TechnologiesSouthwest UniversityNo.2 Tiansheng RoadBeiBei DistrictChongqing 400715China Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province Key Laboratory of Functional Materials and Photoelectrochemistry of HaikouCollege of Chemistry and Chemical EngineeringHainan Normal UniversityHaikou 571158China

The environment benignity and battery cost are major concerns for grid-scale energy storage *** emerging dendrite-free Fe-ion aqueous batteries are promising due to the rich natural abundance,low cost and non-toxicity for Fe ***,serious passivation reactions on Fe anodes and poor long-term cyclability for matched cathodes still stand in the way for their practical *** settle above constraints,we herein use NH_(4)Cl as the electrolyte regulator to elevate the reaction kinetics of passivated Fe anodes,and also propose a special cathode-free design to prolong the cells lifetime over 1,000 *** added NH_(4)Cl can erode/break inert passivation layers and strengthen the ion conductivity of electrolytes,facilitating the reversible Fe plating/stripping and Fe^(2+)*** highly puffed nano carbon foams function as current collectors and actives anchoring hosts,enabling expedite Fe^(2+)adsorption/desorption,FeII/FeIII redox conversions and FeIII *** configured rocking-chair Fe-ion cells have good environmental benignity and decent energy-storage behaviors,including high reactivity/reversibility,outstanding cyclic stability and far enhanced operation *** economical,long-cyclic and green cathode-free Fe-ion batteries may hold great potential in near-future energy-storage power stations.

关键词： elevated kinetics passivated Fe anodes NH_(4)Cl regulator cathode-free design Fe-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Atomically dispersed Ni anchored on polymer-derived mesh-like Ndoped carbon nanofibers as an efficient CO_(2) electrocatalytic reduction catalyst

引用

Nano Research 2022年第5期15卷 3959-3963页

作者： Tai Cao Rui Lin Shoujie Liu Weng-Chon(Max)Cheong Zhi Li Konglin Wu Youqi Zhu Xiaolu Wang Jian Zhang Qiheng Li Xiao Liang Ninghua Fu Chen Chen Dingsheng Wang Qing Peng Yadong Li Department of Chemistry Tsinghua UniversityBeijing 100084China College of Chemistry and Materials Science Anhui Normal UniversityWuhu 241000China Department of Physics and Chemistry Faculty of Science and TechnologyUniversity of MacaoMacao SARChina Research Center of Materials Science Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsBeijing Institute of TechnologyBeijing 100081China

Efficient electroreduction of CO_(2) into CO and other chemicals turns greenhouse gases into fuels and value-added chemicals,holding great promise for a closed carbon cycle and the alleviation of climate ***,there are still challenges in the large-scale application of CO_(2) electroreduction due to the sluggish *** we develop a self-assembly strategy to synthesize a highly efficient CO_(2) reduction electrocatalyst with atomically dispersed Ni-N_(4) active centers anchored on polymerderived mesh-like N-doped carbon nanofibers(Ni-N_(4)/NC).The Ni-N_(4)/NC exhibits high selectivity for CO_(2) reduction reaction with CO Faradaic efficiency(CO FE)above 90% over a wide potential range from−0.6 to−1.0 V *** catalyst reaches a maximum CO FE up to 98.4% at−0.8 V with a TOF of 1.28×10^(5) h^(–1) and Tafel slope of 113 mV·dec^(–1).The catalyst also exhibits remarkable stability,with little change in current density and CO FE over a 10-hour durability test at–0.8 V *** method provides a new route for the synthesis of highly efficient CO_(2) reduction electrocatalyst.

关键词： CO_(2)reduction reaction Ni-N_(4)site Ni single atoms self-assembly

来源：评论

学校读者我要写书评

暂无评论

Mass transport induced structural evolution and healing of sulfur vacancy lines and Mo chain in monolayer MoS_(2)

引用

Rare Metals 2022年第1期41卷 333-341页

作者： Xiao-Wei Wang Lin-Fang Hou Wei Huang Xi-Biao Ren Wei Ji Chuan-Hong Jin State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Department of Physics Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-Nano DevicesRenmin University of ChinaBeijing 100872China Hunan Institute of Advanced Sensing and Information Technology Xiangtan UniversityXiangtan 411105China

Defects play vital roles in tailoring structures and properties of materials including the atomically thin two-dimensional(2D)materials,and increasing demands are requested to find effective ways to realize the defect engineering,i.e.,tuning the defects and thus the materials’structure–property in a well-controlled ***,we propose a novel method to tune the structures and configurations of one-dimensional(1D)line defects in monolayer MoS2 via mass transport induced structural *** using atomic-resolved annular dark-field scanning transmission electron microscopy(ADF-STEM),we demonstrate in situ that sulfur vacancy line defect can be healed locally into defect-free MoS_(2)lattice via the desorption of Mo atoms from vacancy lines and adsorption into a moving Mo ***,directional transport of Mo atoms(or Mo cluster)along the sulfur vacancy lines can induce the formation of Mo *** a mass transport induced defect tuning provides more operational routes for the rational defect designing and property tuning in MoS_(2)as well as other related 2D materials.

关键词： MoS_(2) Defect engineering In situ transmission electron microscopy(TEM) Mass transport Line defect

来源：评论

学校读者我要写书评

暂无评论

Liquid crystal-based optical aptasensor for the sensitive and selective detection of Gram-negative bacteria

引用

science China Chemistry 2022年第10期65卷 2023-2030页

作者： Mengjun Liu Minmin Zhang Jiamei Chen Ruizhi Yang Zhaofan Huang Zhenping Liu Na Li Lingling Shui Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal UniversityGuangzhou 510006China Joint Laboratory of Optofluidic Technology and Systems National Center for International Research on Green OptoelectronicsSouth China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China

The sensitive and differential detection of Gram-negative bacteria is essential in food processing,environmental monitoring,and the daily chemical ***,we propose and validate a liquid crystal(LC)-based aptasensor for the ultrasensitive detection of Escherichia coli(***),a model of Gram-negative *** nematic liquid crystal of 4-cyano-4’-pentylbiphenyl(5 CB) molecules can be orderly or disorderly arranged at the LC-aqueous interface via different stimuli,causing changes in optical texture due to *** schlieren texture is observed when a mixture solution of aptamer and hexadecyl trimethyl ammonium bromide(CTAB) is dripped onto the segmented LC films on a copper *** specific binding of aptamers with target bacteria biomarkers liberates the CTAB molecules,which then self-assemble at the LC-aqueous interface to induce the vertical alignment of *** optical transition from bright to dark is therefore achieved via the LC molecular orientation and serves as an *** the prominent affinity and specificity of the aptamer,the established sensitive and selective *** assay shows an ultralow detection limit of 27 cfu/*** prepared aptasensor can also be applied for the sensitive and selective determination of *** in fruit juice,soft drink,and cosmetic products,and shows great promise for the on-site detection of Gram-negative bacteria with high sensitivity and specificity for environmental monitoring,food safety assessment,and household chemical inspection.

关键词： liquid crystal molecular arrangement optical sensor aptamer Gram-negative bacteria

来源：评论

学校读者我要写书评

暂无评论

Moiré Synaptic Transistor for Homogeneous-Architecture Reservoir Computing

引用

Chinese Physics Letters 2023年第11期40卷 100-107页

作者：王鹏飞陈墨雨谢永勤潘晨 Kenji Watanabe Takashi Taniguchi 程斌梁世军缪峰 Institute of Brain-Inspired Intelligence National Laboratory of Solid State MicrostructuresSchool of PhysicsCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Institute of Interdisciplinary Physical Sciences School of ScienceNanjing University of Science and TechnologyNanjing 210094China Research Center for Functional Materials National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan International Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 NamikiTsukuba 305-0044Japan

Reservoir computing has been considered as a promising intelligent computing paradigm for effectively processing complex temporal *** tunable and reproducible dynamics in the single electronic device have been desired to implement the “reservoir” and the “readout” layer of reservoir computing ***-dimensional moiré materials,with an artificial lattice constant many times larger than the atomic length scale,are one type of most studied artificial quantum materials in community of material science and condensed-matter physics over the past *** materials are featured with gate-tunable periodic potential and electronic correlation,thus varying the electric field allows the electrons in the moiré potential per unit cell to exhibit distinct and reproducible dynamics,showing great promise in robust reservoir ***,we report that a moiré synaptic transistor can be used to implement the reservoir computing system with a homogeneous reservoir-readout *** synaptic transistor is fabricated based on an h-BN/bilayer graphene/h-BN moiré heterostructure,exhibiting ferroelectricity-like hysteretic gate voltage dependence of *** the magnitude of the gate voltage enables the moiré transistor to switch between long-term memory and shortterm memory with nonlinear *** employing the short-and long-term memories as the reservoir nodes and weights of the readout layer,respectively,we construct a full-moiré physical neural network and demonstrate that the classification accuracy of 90.8% can be achieved for the MNIST(Modified National Institute of Standards and technology) handwritten digits *** work would pave the way towards the development of neuromorphic computing based on moiré materials.

关键词： transistor tunable reservoir

来源：评论

学校读者我要写书评

暂无评论

Enhance gas-separation efficiency of mixed matrix membranes by lamellarly arranged metal-organic polyhedron

引用

Nano Research 2023年第8期16卷 11450-11454页

作者： Yida Yang Bowen Pang Wang Zeng Bingxu Ma Panchao Yin Shenglin Yao Xiufang Wen Wei Zhang South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhou 510640China National Centre for Inorganic Mass Spectrometry in Shanghai Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhou 510640China School of Chemistry and Chemical Engineering South China University of TechnologyGuangzhou 510640China

Eliminating the nonselective permeation path inside the mixed-matrix membranes(MMMs)is critical for fabrication of gas separation *** demonstrate that by utilizing the phase separation of block copolymers,we are able to introduce metal-organic polyhedrons(MOPs)with precise pore sizes into a polymer matrix and form an ordered layered *** also prove that,by arranging MOP cages into a continuous nanosheet-like layer structure,we are able to generate repeated MOP-effective pathways and deplete the MOP-free permeation pathways,thus enhancing the gas-separation efficiency of MMMs.

关键词： metal-organic polyhedrons(MOPs) mixed-matrix membranes(MMMs) phase separation of mixed-matrix membranes arrangement of MOPs

来源：评论

学校读者我要写书评

暂无评论

Oil-Water Separation Performance of Electrospray Reduced Graphene Oxide Microspheres with a Local Radially Aligned and Porous Structure

引用

Chemical Research in Chinese Universities 2021年第3期37卷 528-534页

作者： YU Ruomeng SHI Yongzheng YANG Dongzhi Beijing Key Laboratory of Advanced Functional Polymer Composites College of Materials Science and EngineeringBeijing University of Chemical TechnologyBeijing100029P.R.China

Micro-size oil adsorbents are effective for the rapid remediation of special oil ***,N-doped reduced graphene oxide(RGO)microspheres(ca.150µm in diameter)with a local radially aligned and porous structure are fabricated by combining electrospray-freeze-drying with thermal treatment for rapid separation of *** to its hydrophobic/oleophilic properties and oriented structure,the N-doped RGO microspheres achieve high capacities and fast adsorption rates for a variety of oils and organic ***,excellent oil-water separation performance on floating oil/oil-water emulsions and stable cyclic adsorption capacities are obtained for the local radially aligned and porous ***,N-doped RGO microspheres with the unique porous structure have the potential for the remediation of oily sewage and oil spills.

关键词： Electrospray Radially aligned structure Microsphere Reduced graphene oxide Oil-water separation

来源：评论

学校读者我要写书评

暂无评论

V-doped Ni_(3)N/Ni heterostructure with engineered interfaces as a bifunctional hydrogen electrocatalyst in alkaline solution:Simultaneously improving water dissociation and hydrogen adsorption

引用

Nano Research 2021年第10期14卷 3489-3496页

作者： Huan Zhang Juan Wang Fengqi Qin Huiling Liu Cheng Wang Tianjin Key Laboratory of Advanced Functional Porous Materials Institute for New Energy Materials and Low-Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China

Alkali-water electrolyzers and hydroxide exchange membrane fuel cells are emerging as promising technologies to realize hydrogen *** cost-effective electrode materials with high activities towards corresponding hydrogen evolution(HER)and oxidation(HOR)reactions plays a crucial role in commercial hydrogen production and ***,we fabricated a V-doped Ni_(3)N/Ni heterostructure(V-Ni_(3)N/Ni)through a controlled nitridation treatment on a V-incorporated nickel hydroxide *** resultant catalyst exhibits comparable catalytic activity and durability to commercial Pt/C in terms of both HER(a low overpotential of 44 mV at the current density of 10 mA·cm^(-2))and HOR(a high current density of 1.54 mA·cm^(-2)at 0.1 V versus reversible hydrogen electrode)under alkaline *** superior activity of V-Ni_(3)N/Ni grown on different substrates further implies its intrinsic *** functional theory(DFT)calculations reveal that the coupled metallic Ni and doped V can promote the water adsorption,accelerate the Volmer step of alkaline HER,as well as optimize the adsorption and desorption of hydrogen intermediate(H^(*))to reach a balancedΔGH*value.

关键词： interface engineering doping water dissociation hydrogen adsorption alkaline hydrogen electrocatalysis

来源：评论

学校读者我要写书评

暂无评论

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

引用

science China(Technological sciences) 2023年第9期66卷 2735-2742页

作者： WANG Yun ZHA YanFang YANG YunYi LIU CiHui DI YunSong CAO GuiYuan WEI ShiBiao CHEN ZhiHui GAN ZhiXing Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationSchool of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, ***-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

关键词： perovskite nanocrystals photonic crystals all-optical logic gates modulation of photoluminescence

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：