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A mini review on two-dimensional nanomaterial assembly

Nano Research 2020年第5期13卷 1179-1190页

作者： Zhiwei Fang Qiyu Xing Desiree Fernandez Xiao Zhang Guihua Yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at AustinAustinTexas 78712USA 2 School of Chemistry and Materials ScienceUniversity of Science&Technology of ChinaHefei 230026China

Two-dimensional(2D)nanomaterials have attracted a great deal of attention since the discovery of graphene in 2004,due to their intriguing physicochemical properties and wide-ranging applications in catalysis,energy-related devices,electronics and *** maximize the potential of 2D nanomaterials for their technological applications,controlled assembly of 2D nanobulding blocks into integrated systems is critically *** mini review summarizes the reported strategies of 2D materials-based assembly into integrated functional nanostructures,from in-situ assembly method to post-synthesis *** applications of 2D assembled integrated structures are also covered,especially in the areas of energy,electronics and sensing,and we conclude with discussion on the remaining challenges and potential directions in this emerging field.

关键词： two-dimensional materials assembly self-assembly post-synthesis assembly integrated nanostructures

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Efficient First-Principles Framework for Overdamped Phonon Dynamics and Anharmonic Electron-Phonon Coupling in Superionic materials

arXiv

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arXiv 2025年

作者： Wang, Yuxuan Zacharias, Marios Zhang, Xiao Pant, Nick Even, Jacky Poudeu, Pierre F.P. Kioupakis, Emmanouil Department of Materials Science and Engineering University of Michigan Ann ArborMI48109 United States Univ Rennes INSA Rennes CNRS Institut FOTON - UMR 6082 RennesF-35000 France Applied Physics Program University of Michigan Ann ArborMI48109 United States Oden Institute for Computational Engineering and Sciences The University of Texas at Austin AustinTX78712 United States

Relying on the anharmonic special displacement method, we introduce an ab initio quasistatic polymorphous framework to describe local disorder, anharmonicity, and electron-phonon coupling in superionic conductors. Using the example of cubic Cu2Se, we show that positional polymorphism yields extremely overdamped anharmonic vibrations while preserving transverse acoustic phonons, consistent with experiments. We also demonstrate well-defined electronic band structures with large band gap openings due to polymorphism of 1.0 eV and calculate anharmonic electron-phonon renormalization, yielding band gap narrowing with increasing temperature in agreement with previous measurements. Our approach opens the way for efficient ab initio electronic structure calculations in superionic crystals to elucidate their compelling high figure-of-merit. © 2025, CC BY-NC-ND.

关键词： Energy gap

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Observation of a dynamic magneto-chiral instability in photoexcited tellurium

arXiv

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arXiv 2025年

作者： Huang, Yijing Abboud, Nick Lv, Yinchuan Zhu, Penghao Murzabekova, Azel Lee, Changjun Pappas, Emma A. Petruzzi, Dominic Yan, Jason Y. Chauduri, Dipanjan Abbamonte, Peter Shoemaker, Daniel P. Fernandes, Rafael M. Noronha, Jorge Mahmood, Fahad Department of Physics The Grainger College of Engineering University of Illinois Urbana-Champaign UrbanaIL61801 United States Materials Research Laboratory The Grainger College of Engineering University of Illinois Urbana-Champaign UrbanaIL61801 United States Illinois Center for Advanced Studies of the Universe Department of Physics The Grainger College of Engineering University of Illinois Urbana-Champaign UrbanaIL61801 United States Anthony J. Leggett Institute for Condensed Matter Theory The Grainger College of Engineering University of Illinois Urbana-Champaign UrbanaIL61801 United States Department of Physics The Ohio State University ColumbusOH43210 United States Department of Materials Science and Engineering The Grainger College of Engineering University of Illinois Urbana-Champaign UrbanaIL61801 United States

In a system of charged chiral fermions driven out of equilibrium, an electric current parallel to the magnetic field can generate a dynamic instability by which electromagnetic waves become amplified. Whether a similar instability can occur in chiral solid-state systems remains an open question. Using time-domain terahertz (THz) emission spectroscopy, we detect signatures of what we dub a "dynamic magneto-chiral instability" in elemental tellurium, a structurally chiral crystal. Upon transient photoexcitation in a moderate external magnetic field, tellurium emits THz radiation consisting of coherent modes that amplify over time. An explanation for this amplification is proposed using a theoretical model based on a dynamic instability of electromagnetic waves interacting with infrared-active oscillators of impurity acceptor states in tellurium to form an amplifying polariton. Our work not only uncovers the presence of a magneto-chiral instability but also highlights its promise for THz-wave amplification in chiral materials. © 2025, CC BY.

关键词： Terahertz waves

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THERMODYNAMIC ANALYSIS OF THE IN-GA-SB SYSTEM

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METALLURGICAL AND materials TRANSACTIONS A-PHYSICAL METALLURGY AND materials science 1994年第11期25卷 2331-2340页

作者： YU, TC BREBRICK, RF 1. Materials Science and Engineering Program College of Engineering Marquette University 53233 Milwaukee WI

The phase diagram and thermodynamic data for the In-Ga-Sb system are fit with a model for the LII-V liquid phases, in which the enthalpy and excess entropy of mixing are quartic functions of the atomic fraction and the enthalpy of mixing is a quadratic function of temperature. The Gibbs energy, enthalpy, and entropy of formation of the LII-V compounds are obtained as functions of temperature from the heat capacities and the standard enthalpy and entropy of formation at 298 K. The fits are quantitatively satisfactory and better than any hitherto obtained, particularly for the m-V liquidus lines and the ternary liquid. The partial pressures of Sb, and Sb-4 are calculated along the three phase curves of In1-uGauSb(s), and relations given to obtain the relative chemical potentials of In and/or Ga are from these. The enthalpy of mixing of the m-v liquids is calculated for a few hundred degrees above the compound melting points, where presently there are no data. Characteristics of an improved model are postulated.

关键词： Blending Thermodynamics Mixing Formation entropy formation entropy Quadratics THREE-PHASE function of temperature Phase diagrams Enthalpy Heat capacity Function

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Multifunctional MgF_2/Polydopamine Coating on Mg Alloy for Vascular Stent Application

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Journal of materials science & Technology 2015年第7期31卷 733-743页

作者： Xiaoli Liu Zhen Zhen Jing Liu Tingfei Xi Yudong Zheng Shaokang Guan Yufeng Zheng Yan Cheng School of Materials Science and Technology University of Science and Technology Beijing Center for Biomedical Materials and Tissue Engineering Academy for Advanced Interdisciplinary StudiesPeking University Shenzhen Research Institute Peking University Materials Research Center School of Materials Science and EngineeringZhengzhou University

Mg alloy is of great potential in the application of vascular stent due to its degradation in physical environment and proper mechanical property. However its mechanical integrity does not meet the clinical requirement clue to relatively fast degradation. Besides, in order to accelerate the re- endothelialization of Mg-based stents, it needs surface modification to improve the attachment, growth and adhesion of endothelial cells （ECs）. To solve the main obstacles, an anti-corrosion and quick endothelialization coating was prepared on novel Mg-Zn-Y-Ncl alloy via a simple two-step immersion method in the present study, first in hydrofluoric acid （HF） then in dopamine tris-Hydrochloric acid （tris -HCI） solution. The coating was uniform and thin, which consisted of two layers--the upper was pol- yclopamine （PDA） layer and the lower was MgF2 layer. The alloy with the coating demonstrated dramatic corrosion resistance enhancement in vitro by immersion test and electrochemical test. Moreover the HF- PDA-treated Mg alloy exhibited great performance of cell adhesion and proliferation. The coating created a favorable environment for ECs to have a competitive advantage over vascular smooth muscle ceils （VSMCs）, which was preferable for re-enclothelialization. The results suggest that HF-PDA-treatecl Mg -Zn-Y-Nd alloy has great potential in the application of vascular stent and the surface coating method is of great aPPlication value in biodegraclable Mg alloy stent clue to its simplicity and effectiveness.

关键词： Mg-Zn-Y-Nd alloyVascular stentHF converted layerPolydopamineCorrosion resistanceRe-endotheliazation

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ASSOCIATED SOLUTION MODEL FOR GA-IN-SB AND HG-CD-TE

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SEMICONDUCTORS AND SEMIMETALS 1983年第C期19卷 171-253页

作者： BREBRICK, RF SU, CH LIAO, PK Materials Science and Metallurgy Program College of Engineering Marquette University Milwaukee Wisconsin

This chapter presents a large part of the experimental phase diagram and thermodynamic data for the Ga–In–Sb and Hg–Cd–Te systems, along with calculated values for these data obtained from a simultaneous, quantitatively good, and thermodynamically self-consistent fit to the experimental data. There are three aspects of the chapter. (1) Reliable phase diagram and thermodynamic data are considered simultaneously. (2) The congruent melting of binary compounds introduces pinning points for any proposed liquid model. For instance, at the 1092°C melting point of CdTe(s), the enthalpy of the mixing of the 50 at.% liquid must equal the sum of the enthaIpy of the formation of CdTe(s) from its pure liquid elements and the enthalpy of fusion. (3) The basic liquidus equations used are not equivalent to the commonly used simplification of the equation in which the constant pressure heat capacity of CdTe(s) and of CdTe(l) would be assumed to be equal. Such an assumption introduces an error into the calculation of liquidus temperatures that can be significant.

关键词： Mercury compounds

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Impression recovery of amorphous polymers

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JOURNAL OF ELECTRONIC materials 1997年第7期26卷 859-862页

作者： Yang, FQ Zhang, SL Li, JCM Materials Science Program Department of Mechanical Engineering University of Rochester Rochester

The impression made by a loaded cylindrical flat-end punch on a polymer surface was observed to disappear with time at the same temperature after the load was removed. The depth-time relation appeared to obey second order kinetics. The temperature dependence of the rate constant shows two consecutive processes with activation energies, 906 kJ/mole (between 143 and 147 degrees C) and 91 kJ/mole (between 150 and 160 degrees C) for PC (Tg is at about 146 degrees C) and 440 kJ/mole (between 104 and 110 degrees C) and 95 kJ/mole (between 115 and 140 degrees C) for PMMA (Tg is at about 112 degrees C). These activation energies are probably associated with the motion and annihilation of conformational or structural defects of opposite signs. This kind of shape memory phenomena may be general for all amorphous polymers.

关键词： creep dimensional recovery dimensional stability impression recovery indentation recovery PC PMMA polymer

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Bioprinted high cell density liver model with improved hepatic metabolic functions

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Biomaterials 2025年 320卷 123256-123256页

作者： Lu, Ting-Yu Ji, Yichun Lyu, Cheng Shen, Erin Nicole Sun, Yazhi Xiang, Yi Meng-Saccoccio, Tobias Feng, Gen-Sheng Chen, Shaochen Program in Materials Science and Engineering University of California San Diego La Jolla CA92093 United States Department of Pathology Department of Molecular Biology Moores Cancer Center University of California San Diego La Jolla CA92093 United States Department of Chemical and Nano Engineering University of California San Diego La Jolla CA92093 United States Department of Bioengineering University of California San Diego La Jolla CA92093 United States

In vitro liver tissue models are valuable for studying liver function, understanding liver diseases, and screening candidate drugs for toxicity and efficacy. While three-dimensional (3D) bioprinting shows promise in creating various types of functional tissues, current efforts to engineer a functional liver tissue face challenges in replicating native high cell density (HCD) and maintaining long-term cell viability. HCD is crucial for establishing the cell-cell interactions necessary to mimic the liver's metabolic and detoxification functions. However, HCD bioinks exacerbate light scattering in light-based 3D bioprinting. In this study, we incorporated iodixanol into our bioink formulation to minimize light scattering, enabling the fabrication of hepatic tissue constructs with an HCD of 8 × 107 cells/mL while maintaining high cell viability (∼80 %). The printed dense hepatic tissue constructs showed enhanced cell-cell interactions, as evidenced by increased expression of E-cadherin and ZO-1. Furthermore, these constructs promoted albumin secretion, urea production, and P450 metabolic activity. Additionally, HCD hepatic tissue inactivated the YAP/TAZ pathway via cell-cell interactions, preserving primary hepatocyte functions. Further screening revealed that hepatocytes in the dense model were more sensitive to drug treatments than those in a lower-density hepatic model, highlighting the importance of HCD in recapitulating the physiological drug responses. Overall, our approach represents a significant advancement in liver tissue engineering, providing a promising platform for the development of physiologically relevant in vitro liver models for drug screening and toxicity testing. © 2025 Elsevier Ltd

关键词： 3D bioprinting in vitro hepatic model primary hepatocyte high cell density drug screening

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Monitoring blood pressure through a single hybrid hemodynamic signal with a flexible optoelectronic patch

Device

引用

Device 2025年

作者： Zhong, Yizhou Zhang, Yongcao Pu, Jing Wustoni, Shofarul Uribe, Johana Lopez-Larrea, Naroa Marks, Adam McCulloch, Iain Mecerreyes, David Baran, Derya Inal, Sahika Organic Bioelectronics Laboratory Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Materials Science and Engineering Program (MSE) Physical Sciences and Engineering Division (PSE) KAUST Thuwal 23955-6900 Saudi Arabia POLYMAT University of the Basque Country UPV/EHU Avenida Tolosa 72 Guipuzcoa Donostia-San Sebastian 20018 Spain Department of Chemistry University of Oxford Oxford OX1 3TF United Kingdom Andlinger Center for Energy and the Environment and Department of Electrical and Computer Engineering Princeton University Princeton 08544 NJ United States IKERBASQUE Basque Foundation for Science Plaza Euskadi 5 Bilbao 48009 Spain

Hemodynamics, the study of blood flow and circulatory forces, is fundamental for assessing cardiovascular health, disease states, and therapeutic outcomes. Here, we introduce a skin-conformable organic optoelectronic thin-film patch (ePatch) designed to simultaneously capture electrocardiography (ECG) and photoplethysmography (PPG) signals as a single hybrid signal, named the electrocardio-photoplethysmogram (EC-PPG). The ePatch integrates an organic electrochemical transistor (OECT), an organic photodiode, surface-mounted light-emitting diodes, and electrochemical electrodes on a flexible, skin-conforming substrate. By training deep learning models on the hybrid EC-PPG data, we achieved accurate arterial blood pressure estimations, with mean errors of just 1.69 mmHg for systolic and 0.89 mmHg for diastolic blood pressure, outperforming traditional predictions that rely on individual physiological signals as inputs. Our findings underscore the potential of EC-PPG as a compound hemodynamic signal for AI-driven vital sign monitoring and integrated, solution-processable soft electronics for clinical and point-of-care applications. © 2025 The Authors

关键词： DTI-3: Develop electrocardiography electrophysiology flexible electronics OECT OPD organic electrochemical transistor photoplethysmography wearable electronics

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EBSD Investigation on Effect of Cooling Rate on Microstructure and Transformation Textures of High Strength Hot-rolled Steel Plates

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Journal of Iron and Steel Research International 2016年第3期23卷 261-269页

作者： Nancy M.LOPEZ GRANADOS Armando SALINAS RODRIGUEZ Department of Metallurgical Engineering and Materials Science Center of Research and Advanced StudiesCINVESTAV-Unidad Saltillo

The effect of cooling rate on the microstructure and transformation textures of high strength hot-rolled steels was *** treated samples subjected to different cooling conditions were characterized by optical and scanning electron microscopes using orientation imaging microscopy（OIM）.The experimental results demonstrate that there is a significant effect of cooling rate on microstructures and textures resulting from phase *** cooling rates lead to the appearance of the cube（001）[010],rotated cube（001）[110]/（001）[110],Goss（110）[001]and rotated Goss（110）[110]*** contrast,textures developed at rapid cooling rates are preferably of Cu（112）[111],Br（110）[112],transformed Cu（113）[110]and transformed Br（332）[113]/（112）[131].These texture changes are attributed to the selective character of the phase *** OIM technique was used to have a better understanding of the formation of phases and their relationship between microstructure and processing *** volume fraction of micro-constituents resulting from phase transformation such as bainite,martensite and different types of ferrite,can be measured satisfactorily by this technique correlating image quality of EBSD patterns to specific phases.

关键词： orientation imaging microscopy texture phase transformation microstructure steel

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