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CLEO: science and Innovations, S and I 2022

作者： Arnold, Kellen P. Halimi, Sami I. Allen, Joshua A. Hu, Shuren Weiss, Sharon M. Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37235 United States Department of Electrical Engineering and Computer Science Vanderbilt University NashvilleTN37235 United States

We report a split ring photonic crystal that demonstrates an order of magnitude larger peak energy density compared to traditional photonic crystals. The split ring offers highly focused optical energy in an accessibl...

ISBN: (纸本)9781557528209

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Electrochemically Modulated Metasurfaces

Electrochemically Modulated Metasurfaces

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Eaves-Rathert, Janna Kovalik, Elena Ugwu, Chibuzor Fabian Pint, Cary L. Valentine, Jason G. Department of Mechanical Engineering Vanderbilt University NashvilleTN37212 United States Interdisciplinary Materials Science Program Vanderbilt University NashvilleTN37212 United States Department of Mechanical Engineering Iowa State University AmesIA50011 United States

Electrochemical intercalation of lithium in titanium dioxide and silicon-based metasurfaces is used to initiate phase changes in a continuously tunable, reversible, and bistable manner for dynamic control over structu... 详细信息

ISBN: (纸本)9781957171258

关键词： Titanium dioxide

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Field-driven cluster formation in two-dimensional colloidal binary mixtures

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Physical Review E 2023年第4期107卷 044605-044605页

作者： Dingwen Qian Monica Olvera de la Cruz Applied Physics Program Department of Materials Science and Engineering Department of Chemistry and Department of Physic and Astronomy Northwestern University Evanston Illinois 60208 USA

We study size- and charge-asymmetric oppositely charged colloids driven by an external electric field. The large particles are connected by harmonic springs, forming a hexagonal-lattice network, while the small particles are free of bonds and exhibit fluidlike motion. We show that this model exhibits a cluster formation pattern when the external driving force exceeds a critical value. The clustering is accompanied with stable wave packets in vibrational motions of the large particles.

关键词： Transport phenomena Charged colloids

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Specular Inverse Faraday Effect in Transition Metals

arXiv

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arXiv 2023年

作者： Ortiz, Victor H. Mishra, Shashi B. Vuong, Luat Coh, Sinisa Wilson, Richard B. Department of Mechanical Engineering and Materials Science and Engineering Program University of California RiversideCA92521 United States

The inverse Faraday effect is an opto-magnetic phenomenon that describes the ability of circularly polarized light to induce magnetism in solids. The capability of light to control magnetic order in solid state materials and devices is of interest for a variety of applications, such as magnetic recording, quantum computation and spintronic technologies. However, significant gaps in understanding about the effect persist, such as what material properties govern the magnitude of the effect in metals. In this work, we report time-resolved measurements of the specular inverse Faraday effect in non-magnetic metals, i.e., the magneto-optic Kerr effect induced by circularly polarized light. We measure this specular inverse Faraday effect in Cu, Pd, Pt, W, Ta, and Au at a laser wavelength of 783 nm. For Ta and W, we investigate both α and β phases. We observe that excitation of these metals with circularly polarized light induces significant circular dichroism. This nonlinear magneto-optical response to circularly polarized light is an order of magnitude larger in α-W than other metals, e.g., Pt, Au, and is greater than nearly all other reported values for the inverse Faraday effect in other materials. Our results benchmark the range of the inverse Faraday effect that can be observed in non-magnetic metals and provide insight into what material properties govern the inverse Faraday effect in metals. © 2023, CC BY.

关键词： Light polarization

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Study Of The Influence Of Milling Time On The Synthesis Temperature Of Monoclinic And Orthorhombic Nanostructured Cunb2o6 Via High-Energy Milling

Study Of The Influence Of Milling Time On The Synthesis Temp...

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Euro Powder Metallurgy 2023 Congress and Exhibition, PM 2023

作者： Gomes, Uilame Umbelino de Araújo, Kívia Fabiana Galvão José, Maria Lima, Santos De Souza, Vitor Manoel Silva Fernandes da Silva Lourenço, Cléber Raimundo, Rafael Alexandre Materials Science and Engineering Postgraduate Program Federal University of Rio Grande do Norte Natal59078-970 Brazil Department of Physics Federal University of Paraíba João Pessoa58051-900 Brazil

Copper niobate (CuNb2O6) has been studied for technological and environmental applications, such as in solar cells and photocatalysts, for example. And to make the application of CuNb2O6 even more feasible, in this study, therefore, high-energy milling was applied in its synthesis process with variation in the milling time, from the precursor powders Nb2O5 and CuO. The calcination occurred in a muffle with temperatures in the range of 500 °C to 1000 °C, for 3 h and heating rate of 5 °/min. Then, the powders were characterized by XRD, SEM, EDS and Raman. The powders showed crystallite sizes smaller than 80 nm, good homogeneity and high purity. The particle morphologies and the Raman spectrum are coherent with the literature. It was also verified that the increase in milling time reduced the initial formation temperature of the monoclinic phase and the calcination time for the complete formation of the orthorhombic phase. © European Powder Metallurgy Association (EPMA)

关键词： Mechanical alloying

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Sequence-Defined Nanotubes Assembled from IR780-Conjugated Peptoids for Chemophototherapy of Malignant Glioma

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Research 2021年第1期2021卷 1379-1390页

作者： Xiaoli Cai Mingming Wang Peng Mu Tengyue Jian Dong Liu Shichao Ding Yanan Luo Dan Du Yang Song Chun-Long Chen Yuehe Lin School of Mechanical and Materials Engineering Washington State UniversityPO Box 642920 PullmanWashington 99164USA Physical Sciences Division Pacific Northwest National LaboratoryRichlandWA 99352USA Department of Mechanical Engineering and Materials Science and Engineering Program State University of New YorkBinghamtonNew York 13902USA

Near-infrared(NIR)laser-induced phototherapy through NIR agents has demonstrated the great potential for cancer ***,insufficient tumor killing due to the nonuniform heat or cytotoxic singlet oxygen(1 O2)distribution over tumors from phototherapy results in tumor recurrence and inferior *** achieve high tumor killing efficacy,one of the solutions is to employ the combinational treatment of phototherapy with other modalities,especially with chemotherapeutic *** this paper,a simple and effective multimodal therapeutic system was designed via combining chemotherapy,photothermal therapy(PTT),and photodynamic therapy(PDT)to achieve the polytherapy of malignant glioma which is one of the most aggressive tumors in the ***-780(IR780)dye-labeled tube-forming peptoids(PepIR)were synthesized and self-assembled into crystalline nanotubes(PepIR nanotubes).These PepIR nanotubes showed an excellent efficacy for PDT/PTT because the IR780 photosensitizers were effectively packed and separated from each other within crystalline nanotubes by tuning IR780 density;thus,a self-quenching of these IR780 molecules was significantly ***,the efficient DOX loading achieved due to the nanotube large surface area contributed to an efficient and synergistic chemotherapy against glioma *** the unique properties of peptoids and peptoid nanotubes,we believe that the developed multimodal DOX-loaded PepIR nanotubes in this work offer great promises for future glioma therapy in clinic.

关键词： chemotherapy IR780 modal

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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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Synthesis and characterization of chicken feather derived rachis fiber-bamboo particulate hybrid reinforced epoxy composites for sustainable structural applications

Journal of Responsible Production and Consumption

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Journal of Responsible Production and Consumption 2024年第1期1卷 1-17页

作者： Isiaka Oluwole Oladele Omoye Oseyomon Odemilin Samson Oluwagbenga Adelani Anuoluwapo Samuel Taiwo Olajesu Favor Olanrewaju Department of Metallurgical and Materials Engineering Federal University of Technology Akure Akure Nigeria and Department of Chemical and Mining Engineering University of Johannesburg Johannesburg South Africa Department of Metallurgical and Materials Engineering Federal University of Technology Akure Akure Nigeria Department of Materials Science and Engineering Program University of Colorado at Boulder Boulder Colorado USA Department of School of Aerospace Transport and Manufacturing School of Aerospace Transport and Manufacturing Cranfield University Cranfield UK Department of Materials Science and Engineering Iowa State University Ames Iowa USA

Purpose This paper aims to reduce waste management and generate wealth by investigating the novelty of combining chicken feather fiber and bamboo particles to produce hybrid biocomposites. This is part of responsible production and sustainability techniques for sustainable development goals. This study aims to broaden animal and plant fiber utilization in the sustainable production of epoxy resins for engineering applications. Design/methodology/approach This research used two reinforcing materials [chicken feather fiber (CFF) and bamboo particles (BP)] to reinforce epoxy resin. The BPs were kept constant at 6 Wt.%, while the CFF was varied within 3–15 Wt.% in the composites to make CFF-BP polymer-reinforced composite (CFF-BP PRC). The mechanical experiment showed a 21% reduction in densities, making the CFF-BP PRC an excellent choice for lightweight applications. Findings It was discovered that fabricated composites with 10 mm CFF length had improved properties compared with the 15 mm CFF length and pristine samples, which confirmed that short fibers are better at enhancing randomly dispersed fibers in the epoxy matrix. However, the ballistic properties of both samples matched. There is a 40% increase in tensile strength and a 54% increase in flexural strength of the CFF-BP PRC compared to the pristine sample. Originality/value According to the literature review, to the best of the authors’ knowledge, this is a novel study of chicken fiber and bamboo particles in reinforcing epoxy composite.

关键词： Green composite Sustainability Rachis fiber Bamboo particles Clean environment

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Zinc-Doping-Induced Electronic States Modulation of Molybdenum Carbide: Expediting Rate-Determining Steps of Sulfur Conversion in Lithium-Sulfur Batteries

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Advanced science 2025年第0期 e2417126页

作者： Qin, Bin Li, Yanmei Wang, Qun Zhang, Si Zhang, Jinglin Wang, Bin Wang, Peijia Chen, Yuhan Yao, Weiqi Wang, Fang Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education & School of Chemistry and Materials Science Shanxi Normal University Taiyuan030001 China Shanxi Key Laboratory of Advanced Magnetic Materials and Devices & Research Institute of Materials Science of Shanxi Normal University Taiyuan030001 China Basic Department Shanxi Agricultural University Jinzhong030801 China School of Materials Science and Engineering Harbin Institute of Technology Harbin150001 China Department of Mechanical Engineering City University of Hong Kong 999077 Hong Kong Materials Science and Engineering Program & Texas Materials Institute The University of Texas at Austin AustinTX78712 United States

Enhancing Li2S deposition and oxidation kinetics in lithium-sulfur batteries, especially the potential-limiting step under lean electrolyte, can be effectively achieved by developing conductive catalysts. In this study, by using ZnMoO4 as precursors, Zn-doped molybdenum carbide microflowers (Zn-Mo2C) composed of speared porous sheets are fabricated with a hierarchically ordered structure. Density functional theory calculations indicate that Zn doping shifts the d-band center on Mo atoms in Mo2C upward, promotes the elevation of certain antibonding orbitals in Mo─S bonds above the Fermi level, enhances d-p interaction between lithium polysulfides (LiPSs) and catalysts, weakens both S─S and Li─S bonds of LiPSs. Incorporating Zn significantly reduces the Gibbs free energy barrier for the rate-limiting step of the Li2S2 → Li2S conversion, from 0.52 eV for Mo2C to just 0.05 eV for Zn-doped Mo2C. Thus, the synthesized Zn-Mo2C demonstrates impressive bifunctional electrocatalytic performance, significantly advancing sulfur reduction and Li2S decomposition. Moreover, this modification enhances charge transfer within the Zn-Mo2C/LiPSs system, synergistically accelerating the kinetics of Li2S4 to Li2S reduction and Li2S oxidation. The Zn-Mo2C/S cathode demonstrates impressive electrochemical performance, achieves remarkable cycling stability with a minimal capacity decay of 0.021% per cycle over 1000 cycles at 5 C, underscoring its potential for high-energy applications. © 2025 The Author(s). Advanced science published by Wiley-VCH GmbH.

关键词： Gibbs free energy

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Method for the extraction of circulating nucleic acids based on MOF reveals cell-free RNA signatures in liver cancer

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National science Review 2024年第1期11卷 94-106页

作者： Yuqing Sun Haixin Yu Shaoqing Han Ruoxi Ran Ying Yang Yongling Tang Yuhao Wang Wenhao Zhang Heng Tang Boqiao Fu Boshi Fu Xiaocheng Weng Song-Mei Liu Hexiang Deng Shuang Peng Xiang Zhou College of Chemistry and Molecular Sciences Key Laboratory of Biomedical Polymers-Ministry of Education Wuhan University Department of Digestive Surgical Oncology Union Hospital Tongji Medical College Huazhong University of Science and Technology Cancer Center Union HospitalTongji Medical CollegeHuazhong University of Science and Technology Department of Clinical Laboratory Center for Gene Diagnosis and Program of Clinical Laboratory Zhongnan Hospital of Wuhan University College of Chemistry and Materials Science Hubei Engineering University Department of Pharmacology School of Pharmacy China Medical University Taikang Center for Life and Medical Sciences Wuhan University Department of Hematology Zhongnan Hospital of Wuhan University

Cell-free RNA(cf RNA) allows assessment of health, status, and phenotype of a variety of human organs and is a potential biomarker to non-invasively diagnose numerous diseases. Nevertheless, there is a lack of highly efficient and bias-free cf RNA isolation technologies due to the low abundance and instability of cf ***, we developed a reproducible and high-efficiency isolation technology for different types of cell-free nucleic acids(containing cf RNA and viral RNA) in serum/plasma based on the inclusion of nucleic acids by metal-organic framework(MOF) materials, which greatly improved the isolation efficiency and was able to preserve RNA integrity compared with the most widely used research kit method. Importantly, the quality of cf RNA extracted by the MOF method is about 10-fold that of the kit method, and the MOF method isolates more than three times as many different RNA types as the kit method. The whole transcriptome mapping characteristics of cf RNA in serum from patients with liver cancer was described and a cf RNA signature with six cf RNAs was identified to diagnose liver cancer with high diagnostic efficiency(area under curve = 0.905 in the independent validation cohort) using this MOF method. Thus, this new MOF isolation technique will advance the field of liquid biopsy, with the potential to diagnose liver cancer.

关键词： MOF circulating cell-free RNA biomarker liver cancer diagnosis

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