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Structural insights of mechanically induced aluminum-doped hydroxyapatite nanoparticles by Rietveld refinement

Chinese Journal of Chemical engineering 2017年第2期25卷 238-247页

作者： Abbas Fahami Bahman Nasiri-Tabrizi Gary W. Beall Wan Jefrey Basirun Materials Science Engineering and Commercialization Program Texas State University San Marcos 78666 TX USA Advanced Materials Research Center Materials Engineering Department Najafabad Branch Islamic Azad University Najafabad lsfahan lran Department of Chemistry and Biochemistry Texas State University San Marcos 78666 TX USA Physics Department Faculty of Science King Abdulaziz University Jeddah 21589 Saudi Arabia Department of Chemistry Faculty of Science University of Malaya150603 Kuala Lumpur Malaysia

Aluminum doped hydroxyapatite （HA：AI3 ＋） nanopowders were successfully prepared via a simple and efficient one-pot mechanochemical route. The effects of dopant loading on phase compositions and structural features were assessed by Rietveld analysis. The XRD-Rietveld refinement revealed the stabilization of HA in hexagonal structure for all the samples. The sharpness and intensity of the apatite-derived XRD peaks decreased as the dopant content increased to 10% due to the increase in lattice imperfections and mechanically induced amorphization. The incorpo- ration of A13 ＋ into the HA lattice decreased the unit cell parameters. From the FfiR measurements, the representing bands of apatite were identified in all cases. The mechanosynthesized nanopowders consisted of nanospheroids with an average size of 44 - 20 nm and therefore are promising for bone tissue regeneration.

关键词： SynthesisIon exchangeMechanochemicalRietveld refinement

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A Review on Application of Poly(3,4-ethylenedioxythiophene) (PEDOT) in Rechargeable Batteries

Organic Materials

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Organic materials 2022年第4期4卷 292-300页

作者： Su, Laisuo Kumar, Shwetha Sunil Manthiram, Arumugam Reeja-Jayan, B. Materials Science and Engineering Program Texas Materials Institute The University of Texas at Austin Austin 78712 TX United States Department of Mechanical Engineering Carnegie Mellon University Pittsburgh 15213 PA United States

Since the very first patent on poly(3,4-ethylenedioxythiophene) (PEDOT) that was filed in 1988, this polymer has been widely utilized and has achieved great success owing to its high electrical conductivity and excellent stability. The application of the conducting polymer, PEDOT, in renewable energy devices, especially rechargeable batteries, is attracting increasing attention due to its potential to solve the energy and climate crisis. In this review, we summarize the research over the past few decades directed toward the application of PEDOT in rechargeable batteries aimed at improving their electrochemical performance. We focus on PEDOT synthesized via oxidative chemical vapor deposition (oCVD), a relatively new process known for its ability to grow conducting polymer thin films with uniform, pinhole-free properties, and controllable thickness and conformality. For a comparison purpose, PEDOT synthesized via solution-based methods is also briefly summarized. Finally, future research directions for applying oCVD PEDOT in rechargeable batteries are discussed. Introduction PEDOT Synthesis Methods Application of oCVD PEDOT in Rechargeable Batteries Applications of Solution-Based PEDOT in Rechargeable Batteries Conclusions and Outlook. © 2022. The Author(s).

关键词： batteries coating oxidative chemical vapor deposition (oCVD) polyethylene dioxythiophene (PEDOT)

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Concentrated ternary ether electrolyte allows for stable cycling of a lithium metal battery with commercial mass loading high-nickel NMC and thin anodes

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Carbon Energy 2023年第3期5卷 2-18页

作者： Jun Yang Xing Li Ke Qu Yixian Wang Kangqi Shen Changhuan Jiang Bo Yu Pan Luo Zhuangzhi Li Mingyang Chen Bingshu Guo Mingshan Wang Junchen Chen Zhiyuan Ma Yun Huang Zhenzhong Yang Pengcheng Liu Rong Huang Xiaodi Ren David Mitlin School of New Energy and Materials Southwest Petroleum UniversityChengduChina Energy Storage Research Institute Southwest Petroleum UniversityChengduChina Shenzhen Key Laboratory of Nanobiomechanics Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhenChina China Key Laboratory of Polar Materials and Devices(MOE) Department of ElectronicsEast China Normal UniversityShanghaiChina Materials Science Program and Texas Materials Institute The University of Texas at AustinAustinTexasUSA Beijing Computational Science Research Center BeijingChina School of Materials Science and Engineering Center for Green Innovation University of Science and Technology BeijingBeijingChina Department of Materials Science and Engineering Hefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefeiAnhuiChina

A new concentrated ternary salt ether-based electrolyte enables stable cycling of lithium metal battery(LMB)cells with high-mass-loading(13.8 mg cm^(−2),2.5 mAh cm^(−2))NMC622(LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2))cathodes and 50μm Li ***“CETHER-3,”this electrolyte is based on LiTFSI,LiDFOB,and LiBF4 with 5 vol%fluorinated ethylene carbonate in 1,***-cial carbonate and state-of-the-art binary salt ether electrolytes were also tested as *** CETHER-3,the electrochemical performance of the full-cell battery is among the most favorably reported in terms of high-voltage cycling *** example,LiNi_(x)Mn_(y)Co_(1-x-y)O_(2)(NMC)-Li metal cells retain 80%capacity at 430 cycles with a 4.4 V cut-off and 83%capacity at 100 cycles with a 4.5 V cut-off(charge at C/5,discharge at C/2).According to simulation by density functional theory and molecular dynamics,this favorable performance is an outcome of enhanced coordination between Li^(+)and the solvent/salt *** advanced microscopy(high-resolution transmission electron microscopy,scanning electron microscopy)and surface science(X-ray photoelectron spectroscopy,time-of-fight secondary ion mass spectroscopy,Fourier-transform infrared spectroscopy,Raman spectroscopy),it is demonstrated that a thinner and more stable cathode electrolyte interphase(CEI)and solid electrolyte interphase(SEI)are *** CEI is rich in lithium sulfide(Li_(2)SO_(3)),while the SEI is rich in Li_(3)N and *** cycling,the CEI/SEI suppresses both the deleterious transformation of the cathode R-3m layered near-surface structure into disordered rock salt and the growth of lithium metal dendrites.

关键词： concentrated electrolyte density functional theory ether electrolyte high‐nickel cathode high‐voltage battery molecular dynamics

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Solid-state ionic materials for critical applications

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Journal of Materiomics 2019年第2期5卷 147-148页

作者： Yunhui Huang Arumugam Manthiram B.V.R.Chowdari Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai201804China Materials Science and Engineering Program&Texas Materials Institute The University of Texas at AustinAustinTX78712USA Department of Physics Solid State Ionics&Advanced Batteries LabNational University of Singapore117542Singapore

Solid-state ionics is a subdiscipline concerning the theory and application of solid-state ionic conductors,which covers several fields such as solid-state physics,solid-state chemistry,electrochemistry and solid-state ***,the corresponding materials play critical roles in various devices based on solid-state *** recent years,solid-state ionic materials have attracted more attention due to their extensive applications in portable electronics,electric vehicles,large-scale energy storage,etc..In order to exhibit the recent developments on solid-state ionics,we organize a special issue on solid-state ionic materials in the Journal of *** issue includes a broad range of topics like electrode materials,separators and solid-state electrolytes used in Li-ion based batteries,proton conduction in proton exchange membrane fuel cells(PEMFCs),electrodes and membranes used in solid oxide fuel cells(SOFCs),carbon-based micro-supercapacitors,sensors and photocatalysis.

关键词： state critical Solid

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Moisture effects on selective laser flash sintering of yttria-stabilized zirconia 30

Moisture effects on selective laser flash sintering of yttri...

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30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019

作者： Hagen, Deborah Chen, Alex Beaman, Joseph J. Kovar, Desiderio Department of Mechanical Engineering Materials Science and Engineering Program University of Texas at Austin AustinTX78712 United States

Selective laser flash sintering (SLFS) combines a uniform electric field with a localized, scanning laser as the only external heating source. The presence of a large uniform electric field can greatly increase the sintering rate and lower the sintering temperature for ceramics. The combination of lower sintering temperature and faster sintering rates may allow SLFS to be used for ceramic additive manufacturing. In this work, we study the effects of moisture on SLFS of yttria-stabilized zirconia ceramic. We compare the effects of processing parameters on the initiation of SLFS for samples exposed to a range of moisture levels. © Solid Freeform Fabrication 2019: Proceedings of the 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019. All rights reserved.

关键词： Moisture

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Molecular plasmonics: From molecular-scale measurements and control to applications

Molecular plasmonics: From molecular-scale measurements and ...

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作者： Rajeeva, Bharath Bangalore Zheng, Yuebing Materials Science and Engineering Program Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States

ISBN: (纸本)9780841231467

Nanophotonics is a prominent field within nanotechnology aimed at researching the light-matter interactions occurring at the nanoscale. In case of metal nanostructures, collective oscillation of electrons leads to nanoscale confinement of optical fields with high thermal energy and elevated near-field optical forces. The interactions of these effects with molecules known as molecular plasmonics have generated novel devices with implications in energy, biology, and healthcare. In this chapter, we will review our research on molecular plasmonics in three correlated sections: molecular-scale measurements and control, directed and self-assembled nanofabrication, and real-life applications. The first section presents the measurements and control of molecular-scale events using active molecules as a framework. We further summarize two unconventional nanofabrication techniques based on directed and self-assembly, i.e., moiré nanosphere lithography and multi-photon plasmonic lithography. The success in these two arenas positions molecular plasmonics to be propelled for real-life applications. We finally present the potential of plasmonics in achieving its promise of creating futuristic technologies. © 2016 American Chemical Society.

关键词： Plasmonics

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Corrosion behavior of Mg-Zn-Zr-RE alloys under physiological environment-Impact on mechanical integrity and biocompatibility

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Journal of Magnesium and Alloys 2022年第6期10卷 1542-1572页

作者： Marwa AbdelGawad Chaudhry A.Usman Vasanth C.Shunmugasamy Ibrahim Karaman Bilal Mansoor Mechanical Engineering Program Texas A&M University at QatarEducation CityDoh1Qatar Department of Mechanical Engineering Texas A&M University3123 TAMUCollege StationTX 77843United States of America Department of Materials Science and Engineering Texas A&M University3003 TAMUCollege StationTX 77843United States of America

Benefits of RE addition on Mg alloys strength and corrosion resistance are widely reported but their effects on biodegradability and biocompatibility are still of *** paper investigates the effect of RE additions on biodegradability of Mg-Zn alloys under simulated physiological *** this context,two commercial Mg-Zn-Zr-RE alloys,namely ZE41 and EZ33,with same RE addition but different concentrations are studied in Hank’s Balanced Salt Solution(HBSS)at 37℃and with pH of ***-loss,hydrogen evolution,real-time insitu drop test,electrochemical impedance spectroscopy(EIS)and potentiodynamic polarization are deployed to study corrosion *** mechanical integrity of both alloys is assessed by mechanical testing post ***,in vitro biocompatibility is evaluated by indirect cytotoxicity tests using NIH3T3 *** reveal that although both alloys showed similar microstructure,size and distribution of precipitates played a significant role on its corrosion *** and open circuit potential results show stable film formation on EZ33,while ZE41 showed passive layer formation followed by its deterioration,over the analyzed time *** real-time drop test,it was shown in ZE41 alloy that both T-phase and Zr-rich precipitates acted as micro cathodes,resulting in an unstable surface *** EZ33,Zr-rich regions did not influence corrosion response,resulting in better corrosion resistance that was corroborated by post-immersion surface morphology *** higher degradation observed in ZE41 alloy resulted in higher drop in flexural and tensile strength compared to EZ33 *** addition,cytotoxicity tests on NIH3T3 cells revealed that cell viability of EZ33 increased with increasing incubation time,contrary to ZE41,owing to its lower biodegradation behavior and despite higher concentrations of *** results show that an increase in RE concentration in EZ33,relative to ZE41,had a positive effect on

关键词： Magnesium alloy Corrosion EIS Mechanical integrity Cytotoxicity

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Engineered antimicrobial cellulose fiber

Engineered antimicrobial cellulose fiber

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2011 Fall Topical Conference: Filtration and Separation in the New Energy Era

作者： Chen, Jonathan Sun, Liangfeng School of Human Ecology Texas Materials Institute Material Science and Engineering Program University of Texas at Austin TX United States

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Nanomanipulation of Colloidal Particles via Optothermallygated Photon Nudging

Nanomanipulation of Colloidal Particles via Optothermallygat...

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Novel Optical materials and Applications, NOMA 2019

作者： Li, Jingang Liu, Yaoran Zheng, Yuebing Materials Science and Engineering Program and Texas Materials Institute University of Texas at Austin AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin AustinTX78712 United States

We report an all-optical technique for versatile nanomanipulation and assembly of various colloidal particles on a solid substrate by harnessing both photothermal effects and optical scattering forces. © 2019 The... 详细信息

ISBN: (纸本)9781943580644

关键词： Micromanipulators

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Light-controlled reversible assembly of plasmonic nanoparticles

Light-controlled reversible assembly of plasmonic nanopartic...

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Optical Trapping Applications, OTA 2017

作者： Lin, Linhan Peng, Xiaolei Zheng, Yuebing Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Materials Science and Engineering Program and Texas Materials Institute The University of Texas at Austin AustinTX78712 United States

ISBN: (纸本)9781943580255

关键词： Plasmonics

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