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10th Composites and Advanced materials Expo, CAMX 2024

作者： Sheley, Rahul Tate, Jitendra Tehrani, Mehran Materials Science Engineering and Commercialization Program United States Ingram School of Engineering Texas State University 601 University Drive San MarcosTX78666 United States Jacobs School of Engineering University of California 9500 Gilman DriveLa Jolla San DiegoCA92093 United States

ISBN: (纸本)9781934551462

The growing demand for materials that can withstand extreme conditions in the aerospace and automotive industries has led to significant research on high-temperature polymeric composites. These composites are designed to maintain their structural integrity and mechanical properties at temperatures above 300 degrees Celsius. The development of these advanced materials is crucial for improving the performance and safety of aerospace and automotive components operating in extreme environments. Traditionally, thermosets were the most favorable for working in extreme environmental conditions due to their superior heat resistance and durability. Researchers have recently focused more on the development of reinforced thermoplastic composites. The specific challenges faced by researchers and engineers when developing high-temperature composites include maintaining structural integrity and mechanical properties under extreme conditions. The specific techniques used by researchers to modify and reinforce high-temperature thermoplastics for enhanced performance include the use of advanced nanofillers and their dispersion methods, fiber reinforcement strategies, flame retardant formulations, and toughening agent incorporation. The research has shown promising results in improving the mechanical, thermal, and physical performance of thermoplastics composites. However, challenges remain in predicting the long-term performance and durability of high-temperature thermoplastics in aerospace and automotive environments. These materials are essential for applications requiring thermal and chemical resistance, but their deployment in critical environments exposes them to conditions that can lead to fatigue failure through different mechanisms. These mechanisms include oxidation, thermal degradation, matrix crystallinity changes, fiber-matrix interface degradation, residual stresses, creep, and microcracking. This article aims to review the approaches various authors have adopted to ana

关键词： Durability

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Multi-Component Lubricant Additives Derived from Pickering Emulsion-Templated Ionic Liquid Microcapsules

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Journal of Molecular Liquids 2025年 422卷

作者： Yan, Jieming Lak, Sarah N. Pentzer, Emily B. Mangolini, Filippo Texas Materials Institute The University of Texas at Austin AustinTX78712 United States Materials Science and Engineering Program The University of Texas at Austin AustinTX78712 United States Department of Chemistry Texas A&M University College StationTX77843 United States Department of Materials Science and Engineering Texas A&M University College StationTX77843 United States Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States

Room-temperature ionic liquids (RTILs) have emerged as potential next-generation lubricants owing to their unique physico-chemical properties and promising lubricating behavior. However, their implementation in tribological applications has partly been hindered by their negligible solubility in hydrocarbon fluids. Here, encapsulated ionic liquids (ENILs) with a core of 1-hexyl-3-imidazolium bis(trifluoromethylsulfonyl)imide ([HMIM][TFSI]) and a composite shell of polyurea/graphene oxide were prepared via Pickering emulsion-templated interfacial polymerization using two approaches, namely an RTIL-in-water emulsion stabilized with graphene oxide (GO) nanosheets ([HMIM][TFSI]/GO) and an RTIL-in-oil emulsion-stabilized with octadecylamine-functionalized GO nanosheets ([HMIM][TFSI]/C18-GO). The synthesized ENILs were successfully dispersed in polyalphaolefin (PAO) synthetic oil and used as additives to lubricate 52100 steel-vs.-52100 steel sliding contacts. Tribological tests provided evidence that the addition of [HMIM][TFSI]/C18-GO and [HMIM][TFSI]/GO ENILs to PAO could reduce friction and wear owing to the release of the encapsulated [HMIM][TFSI] at the sliding interface after the mechanical breakage of the shell material at the contact inlet, but only if a significant fraction of the ENILs has a diameter smaller than 20 µm. Comparison of these results with the outcomes of sliding experiments performed with PAO containing ENIL obtained by mini-emulsion polymerization with poly(ethylene glycol dimethacrylate-co-buytl methacrylate) (poly(EGDM-c-BMA)) shells highlights the role of the shell material in reducing friction. These outcomes not only demonstrate that multiple parameters (i.e., size distribution, shell material) affect the tribological performance of ENILs, but also pave the way towards further systematic investigations for optimizing ENILs to be used as additives in oil formulations. © 2025 Elsevier B.V.

关键词： Emulsification

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When graphite meets Li metal

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National science Review 2020年第10期7卷 1521-1522页

作者： Yu Ding Guihua Yu Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin

Wetting, indicating the ability of a liquid to spread out over solid surfaces,is of vital importance in addressing the scientific issues related to energy and environment technologies. The study of wetting encompasses the academic disciplines of surface chemistry, nanotechnology, materials science and energy *** past several decades have witnessed significant progress in achieving desirable wetting performance with water,

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Improving the True Cycling of Redox Mediators-assisted Li-O_(2) Batteries

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Energy & Environmental materials 2021年第2期4卷 201-207页

作者： Deqing Cao Fengjiao Yu Yuhui Chen Xiangwen Gao State Key Laboratory of Materials-oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjingJiangsu 211816China Materials Science and Engineering Program and Texas Materials Institute University of Texas at AustinAustinTX 78712USA State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

The application of redox mediators has been considered as a promising strategy to boost the performance of aprotic Li-O_(2)***,the issues brought with redox mediators,especially on the Li anode side have been ***,we propose a facile approach of preparing a gel polymer membrane that not only allow uniform Li plating/stripping withlarge current densities over extended cycling but also inhibit the diffusion of redox mediators and avoid redox shuttling,self-discharge,and internal *** importantly,the gel polymer membrane prevents the penetration of O_(2)and superoxide intermediates from the Li ***,it ensures the successful application of both lithium anode and redox mediators in Li-O_(2)batteries to achieve the desired high capacity and rate ***,it helps understand the benefit and problems of added redox mediators and reactive oxygen species so that theperformance of such Li-O_(2)batteries can be truly evaluated.

关键词： gel polymer electrolyte Li-O_(2)batteries redox mediator redox shuttle effect

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Light-driven single-cell rotational adhesion frequency assay

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eLight 2022年第1期2卷 154-164页

作者： Yaoran Liu Hongru Ding Jingang Li Xin Lou Mingcheng Yang Yuebing Zheng Department of Electrical and Computer Engineering The University of Texas at AustinAustinTX 78712USA Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA Materials Science&Engineering Program and Texas Materials Institute The University of Texas at AustinAustinTX 78712USA School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Beijing National Laboratory for Condensed Matter Physics and Laboratory of Soft Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808GuangdongChina Department of Biomedical Engineering The University of Texas at AustinAustinTX 78712USA

The interaction between cell surface receptors and extracellular ligands is highly related to many physiological processes in living *** techniques have been developed to measure the ligand-receptor binding kinetics at the single-cell ***,few techniques can measure the physiologically relevant shear binding affinity over a single cell in the clinical ***,we develop a new optical technique,termed single-cell rotational adhesion frequency assay(scRAFA),that mimics in vivo cell adhesion to achieve label-free determination of both homogeneous and heterogeneous binding kinetics of targeted cells at the subcellular ***,the scRAFA is also applicable to analyze the binding affinities on a single cell in native human *** its superior performance and general applicability,scRAFA is expected to find applications in study of the spatial organization of cell surface receptors and diagnosis of infectious diseases.

关键词： diagnosis kinetics rotational

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Ferroelectric Mxene-Assisted Bifeo3 Based Free-Standing Memristors for Multifunctional Non-Volatile Memory Storage

SSRN

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SSRN 2024年

作者： Sattar, Kubra Tahir, Rabia Huang, Houbing Akinwande, Deji Rizwan, Syed Islamabad54000 Pakistan School of Materials Science and Engineering Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China Microelectronics Research Center Materials Science and Engineering Program Texas Materials Institute The University of Texas at Austin AustinTX78758 United States

Extensive research focuses on 2D MXenes ascribed to their adaptable behavior under external parameters, intrinsic ferroelectric nature through oxidation and their tailored conductive ability resulting in exceptional electrochemical and flexible data storage applications. By virtue of these tunable capabilities, titanium carbide Ti3C2Tx MXene has been incorporated as electrodes in free-standing novel memory devices comprising of Bismuth Ferrite (BFO), Graphene Oxide (GO) and heated Ti3C2Tx MXene (h-M) as active functional layers. These devices, owing to their distinct conduction mechanisms transform the capacitive like resistive switching in M/BFO/M scheme to pure memristor switching with the addition of GO in M/BFO/GO/M, exhibiting higher ON/OFF ratio along with increased endurance of > 103, the factor crucial for practical implementations. Here also, the assistance of heated Ti3C2Tx MXene as an additional active layer with BFO has marked the co-existence of negative differential resistance (NDR) along with RS as a novel report, observed for the first time in M/BFO/h-M/M. The reproducibility of NDR and RS under 103 sweeps and three memory architectures with a high ON/OFF resistance ratio of 105 have made them emerge as a potential ensemble for multi-level storage and multifunctional characteristics. This work fits the noticeable increase in ON/OFF ratio of M/BFO/h-M/M out of the three explored memristor devices and its current-voltage feature mimicking the charge-discharge response in energy storage domain will pave the way for next generation high density non-volatile energy-efficient computing architectures as it holds immense importance for enhancing the integration density of integrated flexible electronics. © 2024, The Authors. All rights reserved.

关键词： Memristors

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Coupling of mechanical deformation and electromagnetic fields in biological cells

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Reviews of Modern Physics 2022年第2期94卷 025003-025003页

作者： Mehdi Torbati Kosar Mozaffari Liping Liu Pradeep Sharma Departments of Mechanical Engineering Physics and the Materials Science and Engineering Program University of Houston Houston Texas 77204 USA

The cell, as the most fundamental unit of life, is a microcosm of biology in which the confluence of nearly all aspects of classical physics (mechanics, statistical physics, condensed matter, and electromagnetism) plays out. This leads to a rich and complex emergent behavior that determines the entire gamut of biological functions. Specifically, at the cellular scale, mechanical forces and deformations are inextricably linked to electrical fields (and, to a lesser degree, magnetic fields). This in turn is responsible for phenomenology such as cell-cell communication, morphological evolution, cell fusion, self-assembly, cell fission, magnetoreception, endocytosis, and adhesion, among others. From the viewpoint of biomedicine, cellular response to the combined influence of electrical, magnetic, and mechanical fields has applications in cancer treatment, targeted transfer of medicine, gene therapy, and wound amelioration. As an example of the profound influence of the combined electrical-mechanical coupling, one needs to take cognizance only of the operation of ion channels that form the basis for our sensing system (such as hearing, sight, and tactile sense). The coupled mechanical and electromagnetic behavior of a cell is a highly interdisciplinary endeavor and this review provides a distillation of both the theoretical underpinnings of the subject and the pertinent biological interpretation. The key developments pertaining to this topic are reviewed, a unified mathematical framework that couples nonlinear deformation and electromagnetic behavior as germane for soft biological entities is summarized, gaps in current knowledge are pointed out, and the central issues that are pertinent to future research are commented upon.

关键词： Electromagnetism Mechanical deformation

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Optothermal multimodal manipulation of micro/nanoparticles

Optothermal multimodal manipulation of micro/nanoparticles

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Conference on Lasers and Electro-Optics (CLEO)

作者： Hongru Ding Pavana Siddhartha Kollipara Kan Yao Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX USA Materials Science & Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX USA

We report a new optical platform to achieve on-demand multimodal manipulation of micro/nanoparticles by a synergy of optical and thermal forces.

ISBN: (纸本)9781957171258

We report a new optical platform to achieve on-demand multimodal manipulation of micro/nanoparticles by a synergy of optical and thermal forces.

关键词： Laser beams Nanoparticles Optical force Optical manipulation Optical tweezers Spatial resolution

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Moderate-Refractive-Index Mie Resonators for Versatile Modulation of Two-Dimensional Excitons

Moderate-Refractive-Index Mie Resonators for Versatile Modul...

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Conference on Lasers and Electro-Optics (CLEO)

作者： Jie Fang Yuebing Zheng Materials Science & Engineering Program and Texas Materials Institute The University of Texas at Austin Austin TX USA Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX USA

By coupling well-designed moderate-refractive-index Mie resonators to monolayer semiconductors, we have demonstrated efficient modulation of two-dimensional excitons in multiple dimensions: far-field excitonic radiati... 详细信息

ISBN: (纸本)9781957171258

关键词： Excitons Mie resonances Mie theory Optical resonators Refractive index Semiconductors

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Optothermal Manipulation at Fluid Interfaces

Optothermal Manipulation at Fluid Interfaces

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Conference on Lasers and Electro-Optics (CLEO)

作者： Youngsun Kim Carolina Ponce Zhihan Chen Yuebing Zheng Materials Science & Engineering Program Texas Materials Institute The University of Texas at Austin Austin TX USA Walker Department of Mechanical Engineering The University of Texas at Austin Austin TX USA

Optothermal manipulation of particles at fluid interfaces was studied with a film of gold nanoparticles assembled at aqueous/oil interfaces. The unique optothermal behaviors of particles and fluid interfaces under opt... 详细信息

ISBN: (纸本)9781957171258

关键词： Gold Laser beams Laser irradiation Light scattering Optical force Optical tweezers

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