检索结果-内蒙古大学图书馆

Temperature-Dependent Anisotropy and Two-Band Superconductivity Revealed by Lower Critical Field in Organic Superconductorκ-(BEDT-TTF)_(2)Cu[N(CN)_(2)]Br

引用

Chinese Physics Letters 2023年第6期40卷 56-62页

作者：睦惠景司进杨琴珪相英杨海朋闻海虎 National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China College of Materials Science and Engineering Shenzhen Key Laboratory of Polymer Science and TechnologyShenzhen UniversityShenzhen 518060China

Resistivity and magnetization have been measured at different temperatures and magnetic fields in organic superconductorsκ-(BEDT-TTF)_(2)Cu[N(CN)_(2)]*** lower critical field and upper critical field are determined,which allow to depict a complete phase *** the comparison between the upper critical fields with magnetic field perpendicular and parallel to the conducting ac-planes,and the scaling of the in-plane resistivity with field along different directions,we find that the anisotropyΓis strongly dependent on *** is realized thatΓis quite large(above 20)near Tc,which satisfies the 2D model,but approaches a small value in the low-temperature *** 2D-Tinkham model can also be used to fit the data at high *** is explained as a crossover from the orbital depairing mechanism in high-temperature and low-field region to the paramagnetic depairing mechanism in the high-field and low-temperature *** temperature dependence of lower critical field,Hc1(T),shows a concave shape in wide temperature *** is found that neither a single d-wave nor a single s-wave gap can fit the Hc1(T),however a two-gap model containing an s-wave and a d-wave can fit the data rather well,suggesting two-band superconductivity and an unconventional pairing mechanism in this organic superconductor.

关键词： temperature satis directions

来源：评论

学校读者我要写书评

暂无评论

Block Sequence Effects on the Self-Assembly Behaviors of Polypeptide-Based Penta-Block Copolymer Hydrogels

引用

ACS Applied materials and Interfaces 2024年第5期16卷 6674-6686页

作者： Wang, Ke-Hsin Liu, Chung-Hao Tan, Dun-Heng Nieh, Mu-Ping Su, Wei-Fang Department of Materials Science and Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Polymer program Institute of Materials Science University of Connecticut 25 King Hill Road Unit 3136 StorrsCT06269-3136 United States Department of Chemical and Biomolecular Engineering University of Connecticut StorrsCT06269 United States Department of Materials Engineering Ming-Chi University of Technology 84 Gungjuan Rd. New Taipei City243303 Taiwan

Peptide-based hydrogels have great potential for applications in tissue engineering, drug delivery, and so on. We systematically synthesize, characterize, and investigate the self-assembly behaviors of a series of polypeptide-based penta-block copolymers by varying block sequences and lengths. The copolymers contain hydrophobic blocks of poly(γ-benzyl-l-glutamate) (PBG, Bx) and two kinds of hydrophilic blocks, poly(l-lysine) (PLL, Ky) and poly(ethylene glycol) (PEG, EG34), where x and y are the number of repeating units of each block, where PBG and PLL blocks have unique functions for nerve regeneration and cell adhesion. It shows that a sufficient length of the middle hydrophilic segment capped with hydrophobic end PBG blocks is required. They first self-assemble into flower-like micelles and sequentially form transparent hydrogels (as low as 2.3 wt %) with increased polymer concentration. The hydrogels contain a microscale porous structure, a desired property for tissue engineering to facilitate the access of nutrient flow for cell growth and drug delivery systems with high efficiency of drug storage. We hypothesize that the structure of Bx-Ky-EG34-Ky-Bx agglomerates is beyond micron size (transparent), while that of Ky-Bx-EG34-Bx-Ky is on the submicron scale (opaque). We establish a working strategy to synthesize a polypeptide-based block copolymer with a wide window of sol-gel transition. The study offers insight into rational polypeptide hydrogel design with specific morphology, exploring the novel materials as potential candidates for neural tissue engineering. © 2024 The Authors. Published by American Chemical Society

关键词： Block copolymers

来源：评论

学校读者我要写书评

暂无评论

Effect of Mixing Strategy on the Structure-Properties of the PLA/PBAT Blends Incorporated with CNC

引用

Journal of Renewable materials 2022年第1期10卷 149-164页

作者： Deniz Sema Sarul Dogan Arslan Emre Vatansever Yusuf Kahraman Ali Durmus Reza Salehiyan Mohammadreza Nofar Polymer Science and Technology Program Institute of Science and TechnologyIstanbul Technical UniversityIstanbul34469Turkey Metallurgical&Materials Engineering Department Faculty of Chemical and Metallurgical EngineeringIstanbul Technical UniversityIstanbul34469Turkey Department of Chemical Engineering Faculty of EngineeringIstanbul University-CerrahpasaIstanbul34320Turkey Department of Materials Research and Technology Luxembourg Institute of Science and TechnologyEsch-sur-Alzette4362Luxembourg

Polylactide(PLA)/poly(butylene adipate-co-terephthalate)(PBAT)blend nanocomposites including 3 wt%of cel-lulose nanocrystals(CNCs)were prepared by melt compounding method in a twin-screw extruder and an inter-nal *** nanocomposites were formulated by diluting three different masterbatches prepared by solution casting method that contained 7 wt%of *** masterbatches were:(m1)PLA/PBAT/CNC masterbatch;(m2)PLA/CNC masterbatch;and(m3)PBAT/CNC *** were to explore how different prepara-tion methods affect the dispersion and localization of CNC and hence the properties of PLA/PBAT/CNC blend *** electron microscopy(SEM)was used to study the structural changes of the *** properties of PLA/PBAT blends and PLA/PBAT/CNC blend nanocomposites were also *** the samples prepared by internal mixer,the rheological behavior of blend nanocomposite prepared through premixing of CNC particles with PLA showed a transition from liquid-like to a gel-like *** to the rheological results and differential scanning calorimetry(DSC)analysis,it was found that the CNC overall enhanced the viscoelastic properties of blends and improved the PLA crystallization,*** mechanical analysis(DMA)illustrated that the incorporation of CNC also enhanced the elastic modulus of PLA/PBAT blends specifically above the glass transition temperature of *** expected improvements in mechanical properties did not occur due to the possible existence of residual solvent in the blends.

关键词： Polylactide poly(butylene adipate-co-terephthalate) cellulose nanocrystals blend nanocomposite morphology rheology

来源：评论

学校读者我要写书评

暂无评论

Highly aligned reduced graphene oxide in alumina composites for strengthening,toughening,and electromagnetic interference shielding

引用

Journal of Materiomics 2023年第6期9卷 993-1003页

作者： Tufail Mustafa Yongping Liu Jie Gao Peng Yan Qi Ding Yuchi Fan Wan Jiang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai200050China Department of Chemical Engineering Balochistan University of Information TechnologyEngineering&Management Sciences(BUITEMS)Quetta87300Pakistan

engineering ceramics with high strength,toughness and electromagnetic interference(EMI)shielding effectiveness(SE)are highly desirable as electromagnetic protecting material in harsh ***,we show that both excellent mechanical and EMI shielding performance can be realized in alumina composites embedded with highly aligned reduced graphene oxide(RGO),which are readily prepared via sintering of core-shell structured RGO@Al_(2)O_(3)nanoplates with *** to monolithic Al_(2)O_(3),the highly aligned RGO/Al_(2)O_(3)composites show simultaneously improved strength and toughness up to~26.1%and~60.2%,*** steeply rising R-curve behavior proves the better crack tolerance in the highly aligned structure with respect to randomly oriented ***,the RGO/Al_(2)O_(3)composites also exhibit a high specific EMI SE reaching~34 dB/mm in K band,due to the reflection and highly enhanced absorption after percolation in the out-of-plane *** findings provide a novel strategy of designing mechanically reliable engineering ceramic for EMI shielding.

关键词： Reduced graphene oxide Ceramic composites Strengthening Toughening Electromagnetic interference shielding

来源：评论

学校读者我要写书评

暂无评论

N-Type Doping of Naphthalenediimide-Based Random Donor-Acceptor Copolymers to Enhance Transistor Performance and Structural Crystallinity

引用

ACS Applied materials and Interfaces 2023年第12期15卷 15745-15757页

作者： Chang, Yun Wu, Ying-Sheng Tung, Shih-Huang Chen, Wen-Chang Chueh, Chu-Chen Liu, Cheng-Liang Department of Materials Science and Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering National Taiwan University Taipei10617 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei10617 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei10617 Taiwan

An integrated strategy of molecular design and conjugated polymer doping is proposed to improve the electronic characteristics for organic field effect transistor (OFET) applications. Here, a series of soluble naphthalene diimide (NDI)-based random donor-acceptor copolymers with selenophene π-conjugated linkers and four acceptors with different electron-withdrawing strengths (named as rNDI-N/S/NN/SS) are synthesized, characterized, and used for OFETs. N-type doping of NDI-based random copolymers using (12a,18a)-5,6,12,12a,13,18,18a,19-octahydro-5,6-dimethyl-13,18[1′,2′]-benzenobisbenzimidazo[1,2-b:2′,1′-d]benzo[i][2.5]benzodiazocine potassium triflate adduct (DMBI-BDZC) is successfully demonstrated. The undoped rNDI-N, rNDI-NN, and rNDI-SS samples exhibit ambipolar charge transport, while rNDI-S presents only a unipolar n-type characteristic. Doping with DMBI-BDZC significantly modulates the performance of rNDI-N/S OFETs, with a 3- to 6-fold increase in electron mobility (μe) for 1 wt % doped device due to simultaneous trap mitigation, lower contact resistance (RC), and activation energy (EA), and enhanced crystallinity and edge-on orientation for charge transport. However, the doping of intrinsic pro-quinoidal rNDI-NN/SS films exhibits unchanged or even reduced device performance. These findings allow us to manipulate the energy levels by developing conjugated copolymers based on various acceptors and quinoids and to optimize the dopant-polymer semiconductor interactions and their impacts on the film morphology and molecular orientation for enhanced charge transport. © 2023 American Chemical Society.

关键词： Organic field effect transistors

来源：评论

学校读者我要写书评

暂无评论

Preparation of Amphiphilic Ag-Polyethylenimine Dendritic polymer Nanocapsules for Surface-Enhanced Raman Scattering Detection

引用

ACS Applied polymer materials 2024年第6期6卷 3222-3232页

作者： Xu, Qi-Yang Lin, Gong-De Wang, Kuan-Syun Huang, Ying-Chi Huang, Yu-Xuan Lin, Chen-Yang Wu, Chien-Hsin Jeng, Ru-Jong Liu, Ting-Yu Institute of Polymer Science and Engineering National Taiwan University Taipei10617 Taiwan Department of Materials Engineering Ming Chi University of Technology New Taipei City243303 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei10617 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan City32003 Taiwan College of Engineering & Center for Sustainability and Energy Technologies Chang Gung University Taoyuan33302 Taiwan

According to recent research, amphiphilic surfactants can stabilize metal nanoparticles because of their excellent dispersibility. Therefore, herein, amphiphilic polyethylenimine (PEI) dendritic polymer nanocapsules were synthesized by using PEI and poly(urea/malonamide) dendrons of different generations. Then, silver nanoparticles (AgNPs) were immobilized on PEI dendritic polymer nanocapsules for surface-enhanced Raman scattering (SERS) detection. Well-designed amphiphilic PEI dendrons possessed abundant nucleation sites for AgNP reduction, which could directly reduce silver ions to AgNPs without additional reducing agents at room temperature, showing the stronger reducing capability than pristine PEI. The size and interparticle gap of AgNPs were manipulated by varying the size of the PEI dendritic polymer and the ratio of PEI dendritic nanocapsules/AgNO3. As a result, the Ag-PEI-dendritic polymer was able to perform Raman enhancing capability. Especially, a sample, namely, Ag-PEI-G0.5, exhibited the strongest Raman enhancement effect, due to the optimal size and interparticle gap of AgNPs. The Ag-PEI dendritic SERS nanocapsules could rapidly and reproducibly detect many kinds of biomolecules (adenine, methylene blue, and beta-carotene) with a linear calibration curve. The limit of detection (LOD) of adenine was lower than 10-7 M. Therefore, this facile method to in situ prepare Ag-PEI dendritic SERS nanocapsules (reducing agent free) possesses high potential to be applied in rapid SERS detection for the quantitative analysis of biomolecules. © 2024 American Chemical Society

关键词： Silver nanoparticles

来源：评论

学校读者我要写书评

暂无评论

Sulfur-doped hard carbon hybrid anodes with dual lithium-ion/metal storage bifunctionality for high-energy-density lithium-ion batteries

引用

Carbon Energy 2023年第1期5卷 71-81页

作者： Sungmin Cho Jong Chan Hyun Son Ha Yeonhua Choi Honggyu Seong Jaewon Choi Hyoung-Joon Jin Young Soo Yun Program in Environmental and Polymer Engineering Inha UniversityIncheonSouth Korea KU-KIST Graduate School of Converging Science and Technology Korea UniversitySeoulSouth Korea Departmant of Chemistry and Research Institute of Natural Science Gyeongsang National UniversityJinjuSouth Korea Department of Polymer Science and Engineering Inha UniversityIncheonSouth Korea Division of Energy Engineering Kangwon National UniversityGangwon-doSouth Korea

Bifunctional hybrid anodes(BHAs),which are both a high-performance active host material for lithium-ion storage as well as a guiding agent for homogeneous lithium metal nucleation and growth,exhibit significant potential as anodes for next-generation high-energy-density lithium-ion batteries(LIBs).In this study,sulfur-doped hard carbon nanosphere assemblies(S-HCNAs)were prepared through a hydrothermal treatment of a liquid organic precursor,followed by high-temperature thermal annealing with elemental sulfur for application as BHAs for *** a carbonate-based electrolyte containing fluoroethylene carbonate additive,the S-HCNAs showed high lithium-ion storage capacities in sloping as well as plateau voltage sections,good rate capabilities,and stable *** addition,high average Coulombic efficiencies(CEs)of~96.9%were achieved for dual lithium-ion and lithium metal storage *** the LIB full-cell tests with typical NCM811 cathodes,the S-HCNA-based BHAs containing~400 mA h g^(−1) of excess lithium led to high energy and power densities of~500Wh kg^(−1) and~1695Wkg^(−1),respectively,and a stable cycling performance with~100%CEs was achieved.

关键词： hard carbon hybrid anode lithium-ion batteries lithium metal anode lithium metal batteries sulfur-doped carbon

来源：评论

学校读者我要写书评

暂无评论

Wearable and interactive multicolored photochromic fiber display

引用

Light(science & Applications) 2024年第3期13卷 454-465页

作者： Pan Li Yuwei Wang Xiaoxian He Yuyang Cui Jingyu Ouyang Ju Ouyang Zicheng He Jiayu Hu Xiaojuan Liu Hang Wei Yu Wang Xiaoling Lu Qian Ji Xinyuan Cai Li Liu Chong Hou Ning Zhou Shaowu Pan Xiangru Wang Huamin Zhou Cheng-Wei Qiu Yan-Qing Lu Guangming Tao State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and Engineering and Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China Key Laboratory of Vascular Aging(HUST) Ministry of EducationWuhan 430030China School of Optoelectronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Department of Electrical and Computer Engineering National University of SingaporeSingapore 117583Singapore National Laboratory of Solid State Microstructures Key Laboratory of Intelligent Optical Sensing and ManipulationCollege of Engineering and Applied Sciencesand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210023China School of Performing Arts Wuhan Conservatory of MusicWuhan 430060China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Architecture and Urban Planning Huazhong University of Science and TechnologyWuhan 430074China School of Fashion Beijing Institute of Fashion TechnologyBeijing 100029China School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Tongji Medical College Huazhong University of Science and TechnologyWuhan 430074China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Endowing flexible and adaptable fiber devices with light-emitting capabilities has the potential to revolutionize the current design philosophy of intelligent,wearable interactive ***,significant challenges remain in developing fiber devices when it comes to achieving uniform and customizable light effects while utilizing lightweight ***,we introduce a mass-produced,wearable,and interactive photochromic fiber that provides uniform multicolored light *** designed independent waveguides inside the fiber to maintain total internal reflection of light as it traverses the *** impact of excessive light leakage on the overall illuminance can be reduced by utilizing the saturable absorption effect of fluorescent materials to ensure light emission uniformity along the transmission *** addition,we coupled various fluorescent composite materials inside the fiber to achieve artificially controllable spectral radiation of multiple color systems in a single *** prepared fibers on mass-produced kilometer-long using the thermal drawing *** fibers can be directly integrated into daily wearable devices or clothing in various patterns and combined with other signal input components to control and display patterns as *** work provides a new perspective and inspiration to the existing field of fiber display interaction,paving the way for future human–machine integration.

关键词： fiber interactive colored

来源：评论

学校读者我要写书评

暂无评论

Monodisperse micro-spherical Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+)red phosphors

引用

Journal of Rare Earths 2022年第4期40卷 526-533,I0001页

作者： Jiannan Jia Mengting He Jun Wan Yuting Zhang Hai Guo Xianping Fan Xusheng Qiao Shiguo Chen Department of Physics Zhejiang Normal UniversityJinhua 321004China State Key Laboratory of Silicon Materials&School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China Shenzhen Key Laboratory of Polymer Science and Technology College of Materials Science and EngineeringShenzhen UniversityShenzhen 518055China

With narrow red photoluminescence (PL) bands, tetravalent Mn^(4+) doped phosphors show promising prospect in commercial application to effectively expand color gamut of phosphor converted LED displays. Here, we report a type of Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) phosphors with regular cage-like micro-spherical morphologies. The micron size spherical precursors were synthesized with a propylene oxide (PO) driven fast sol–gel method. The cage -like spherical morphology is beneficial to efficiently trapping much incident light to enhance the PL of the phosphors. Being calcined at 1300 ℃, Sr_(2)MgAl_(21.978)O_(36):0.022Mn^(4+) only exhibits the internal quantum efficiency (IQE) of 24.91%. With the Mg^(2+)-Mn^(4+) codoping and Y^(3+)/Sr^(2+) substituting strategies, to fulfill charge balance and produce John-Teller distortion, IQE of Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) can be further improved up to 36.45%. The CIE color coordinates of Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) under near ultraviolet excitation can be stably fixed to (0.723, 0.227) at deep red region. It thus finds a potential application as pc-LED display with much broader color gamut than that of the NTSC standard. Therefore, Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36):xMn^(4+) micron size spheres can be employed as promising red phosphors for high performance LED displays.

关键词： Mn^(4+) Sr_(2-z)Mg_(1+y)Y_(z)Al_(22-x)O_(36) LED phosphor Cage-like micro-sphere Luminescence Rare earths

来源：评论

学校读者我要写书评

暂无评论

Trace Determination of Cardiac Troponin I Using a Label-Free Fiber Optical Localized Surface Plasmon Resonance Biosensors

Trace Determination of Cardiac Troponin I Using a Label-Free...

引用

2024 Laser Applications to Chemical, Security and Environmental Analysis, LACSEA 2024 - Part of Optica Sensing Congress

作者： Chiang, Chang-Yue Chen, Chien-Hsing Wang, Chien-Tsung Wu, Chin-Wei Chiang, Hsing-Yu Graduate School of Engineering Science and Technology Interdisciplinary Program of Engineering National Yunlin University of Science and Technology Yunlin64002 Taiwan Department of Biomechatronics Engineering National Pingtung University of Science and Technology Pingtung91201 Taiwan Department of Chemical & Materials Engineering National Yunlin University of Science and Technology Yunlin64002 Taiwan

ISBN: (纸本)9781957171371

This work proposes a carboxyl-graphene-oxide-based fiber optic localized surface plasmon resonance biosensor which employed anti-Cardiac Troponin I (anti-cTnI) as the recognition element to detect the cTnI-protein in 10 min with a limit of detection (LOD) of 5.8 pM, which meets the acceptable LOD for clinical testing of 0.04 ng/mL. © Optica Publishing Group 2024, © 2024 The Author(s)

关键词： Surface plasmon resonance

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：