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CsPbBr3nanocrystals plasmonic distributed Bragg reflector waveguide laser

Applied Physics Letters 2023年第7期122卷 1-6页

作者： Ahmad Kamal, Ahmad Syazwan Lin, Cheng-Chieh Wang, Zhiyu Xing, Di Lee, Yang-Chun Chen, Mu-Hsin Ho, Ya-Lun Chen, Chun-Wei Delaunay, Jean-Jacques School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan School of Mechanical Engineering Engineering Campus Universiti Sains Malaysia Pulau Pinang14300 Malaysia Universiti Sains Malaysia Pulau Pinang11900 Malaysia Taiwan International Graduate Program National Taiwan University and Academia Sinica No. 1 Sec. 4 Roosevelt Rd Taipei10617 Taiwan Department of Materials Science and Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Rd. Taipei10617 Taiwan Academia Sinica No. 128 Sec. 2 Academia Rd. Taipei11529 Taiwan National Taiwan University No. 1 Sec. 4 Roosevelt Rd. Taipei10617 Taiwan

The recent development of perovskite-based lasers showcased the outstanding optical properties of the material such as high absorption coefficient and high quantum yield. The lasers were demonstrated in the form of nanowires and nanoplates, which are difficult to be integrated on a chip in the form of high-density arrays due to the difficulties in positioning them on the chip. The solution to this problem should be to use the well-known lithography process in the fabrication process of the lasers. In this work, we demonstrate several perovskite-based plasmonic lasers that were fabricated by using the lithographic in-mold patterning method that relies on the electron beam lithography process. The lasers utilized CsPbBr3 perovskite nanocrystals as the gain material and plasmonic distributed Bragg reflector grating structure as the optical feedback provider to achieve a low lasing threshold of 42.5 μJ/cm2 with a linewidth of 0.6 nm (FWHM) at room temperature. The use of the lithographic process in the fabrication of the lasers makes it possible to fabricate and integrate them on a chip in a relatively high-density manner, so that they can be used extensively in quantum optics and on-chip integrated photonics applications. © 2023 Author(s).

关键词： Perovskite

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Ab initio study on changing behaviors of lithium-rich layered composite cathode materials

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Electrochimica Acta 2024年 500卷

作者： Chuang, Yu-cheng Tran, Ngoc Thanh Thuy Tsai, Ping-chun Lin, Shih-kang Department of Materials Science and Engineering National Cheng Kung University Tainan70101 Taiwan Research Center National Cheng Kung University Tainan70101 Taiwan Department of Mechanical Engineering National Taiwan University of Science and Technology Taipei10607 Taiwan Program on Smart and Sustainable Manufacturing Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan70101 Taiwan Core Facility Center National Cheng Kung University Tainan70101 Taiwan

The lithium-rich composite-layered oxide, xLi2MnO3•(1-x)LiM'O2, where M’ represents transition metals, is a promising cathode material with excellent capacity at high working voltage for lithium-ion batteries (LIBs). Nevertheless, an unusual charge-discharge feature is observed for this material with sloping and plateau regions during the initial charging. In this work, ab initio calculations based on density functional theory were employed to examine the stability of xLi2MnO3•(1-x)Li(Ni1/3Co1/3Mn1/3)O2 composite-layered cathode materials during the first charging. Optimized atomistic models for different compositions (x = 0.0, 0.3, 0.4, 0.5, 0.7, and 1) unveil a pseudo-rhombohedral or monoclinic-like structure within the solid solution phase, with simulated X-ray diffraction patterns closely matching experimental data. Using these atomistic models, the first charging process of the 0.4Li2MnO3•0.6Li(Ni1/3Co1/3Mn1/3)O2 cathode were investigated. There exists phase transition from a layered to a spinel structure. Additionally, Bader charge analysis reveals intriguing trends during the first delithiation process, where the valence states of Ni and Co gradual increase, while that of Mn almost remains unchanged. Simultaneously, significant oxidation of O is observed. This finding leads to further evaluations on oxygen vacancy formation in comparison to the energy required for delithiation. Defect formation energy calculations demonstrate that the plateau in charging curve is resulted from oxygen vacancy formation during the first charging. By empirical fitting oxygen chemical potential at μO = -1.200 eV, the calculated charging-discharging curves aligned well with experimental data during the first and second charging. Furthermore, the pathways of lithium and oxygen deintercalation are elucidated. This work contributes fundamental understandings on the xLi2MnO3•(1-x)LiM'O2 composite-layered oxides as cathode for LIBs, providing valuable guidance for further developments

关键词： Cathodes

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On The Mechanism of Nucleation in Pulsed-laser Quenched Si Films on SiO 2

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MRS Online Proceedings Library 2021年第1期1245卷 1-6页

作者： Y. Deng Q. Hu U. J. Chung A. M. Chitu A. B. Limanov S. James Im Program in Materials Science and Engineering Department of Applied Physics and Applied Mathematics Columbia University New York USA

We have investigated the solid nucleation mechanism in laser-quenched Si films on SiO2. Previously neglected experimental steps, consisting of BHF-etching and irradiation in vacuum, were implemented to reduce potential extrinsic influences. The resulting experimental findings and computational analysis lead us to conclude that solid nucleation consistently takes place heterogeneously at, and only at, the bottom liquid Si-SiO2 interface.

关键词： Si thin film nucleation & growth

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Evaluation of Automatic Microstructural Analysis of Energy Dispersive Spectroscopy (EDS) Maps via a Python-Based Data Processing Framework 240

Evaluation of Automatic Microstructural Analysis of Energy D...

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240th ECS Meeting

作者： Batool, Mariah O. Godoy, Andres Birnbach, Martin Dekel, Dario R Jankovic, Jasna Institute of Materials Science University of Connecticut 97 North Eagleville Road StorrsCT06269-3136 United States Department of Materials Science and Engineering University of Connecticut 97 North Eagleville Road StorrsCT06269-3136 United States Wolfson Department of Chemical Engineering Nancy and Stephen Grand Technion Energy Program Israel Institute of Technology Haifa3200003 Israel

ISBN: (纸本)9781607685395

Computer-aided data acquisition, analysis and interpretation have been employed in various research areas generating useful information. Among these, image processing is most often implemented for post-processing of material characterization data. However, to tackle ambiguity of multi-component materials analysis, spectral data analysis can be used instead. The current study introduces a unique Python-based data processing method for in-depth analysis of energy dispersive spectroscopy (EDS) elemental maps to analyze agglomerate size distribution, average area of each component and their overlap. The framework developed in this study is applied to examine interaction of Cerium (Ce) and Palladium (Pd) particles in membrane electrode assembly (MEA) of Anion-Exchange Membrane Fuel Cell (AEMFC) and investigate if this approach can be utilized to predict the fuel cell's electrochemical behavior. The study concludes that the developed framework is a promising method for automatic data extraction and can be beneficial for use in a variety of clean energy applications. © 2021 ECS - The Electrochemical Society.

关键词： Python

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No external load measurement strategy for micro thermoelectric generator based on high-performance Si_(1-x-y)Ge_(x)Sn_(y) film

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Journal of Materiomics 2021年第4期7卷 665-671页

作者： Ying Peng Sijing Zhu Huajun Lai Jie Gao Masashi Kurosawa Osamu Nakatsuka Sakae Tanemura Biaolin Peng Lei Miao Guangxi Key Laboratory of Information Material School of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin541004China Department of Materials Physics Graduate School of EngineeringNagoya UniversityNagoya464-8603Japan PRESTO Japan Science and Technology Agency4-1-8HonchoKawaguchiSaitama332-0012Japan Institute of Materials and Systems for Sustainability Nagoya UniversityNagoya464-8601Japan Japan Fine Ceramics Center 2-4-1 MutsunoAtsuta-kuNagoya456-8587Japan Center on Nanoenergy Research Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured MaterialsGuangxi Key Laboratory for Relativity AstrophysicsNanning530004China Department of Materials Science and Engineering SIT Research LaboratoriesInnovative Global ProgramFaculty of EngineeringShibaura Institute of TechnologyTokyo135-8548Japan

In this study,a micro in-plane p-type thermoelectric generator(TEG),which consists of thin-film Si_(1-x-y)Ge_(x)Sn_(y) ternary alloy semiconductor on insulator,is developed to make efficient use of waste heat such as human body.A power factor value as high as 1095 mWm^(-1) K^(-2) had been achieved using Bion implanted and short-term rapid thermal annealing(RTA)*** addition,a measuring scheme for micro TEG without external load resistance was *** one measuring session,multiple parameters can be *** micro single-arm TEG prepared by semiconductor process can output 0.29 nW power at a temperature difference of 15 K,and a cross-sectional power density has reached up to 0.58 mW/cm^(2),which is a superior value for wearable *** findings of this study have important reference value for wearable device performance improvement and output power measuring of micro TEG.

关键词： Si_(1-x-y)Ge_(x)Sn_(y) film P-type TEG No external load measurement Ambient power density

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A Surface-Strained and Geometry-Tailored Nanoreactor that Promotes Ammonia Electrosynthesis

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Advanced materials 2020年第50期132卷 22799-22805页

作者： Li, Panpan Jin, Zhaoyu Fang, Zhiwei Yu, Guihua Materials Science and Engineering Program and Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States Center for Electrochemistry Department of Chemistry The University of Texas at Austin AustinTX78712 United States

A surface-strained and geometry-optimized TiO2 nanoreactor enhances the performance of electrocatalytic nitrogen fixation. The nanotubular confinement allows spatial regulation of the mass transport of nitrogen during the NRR process and offers an enlarged surface area, thus boosting the ammonia production with high selectivity. Both experimental and theoretical evidence support strained Ti3+ sites, demon- strating a more favorable pathway for the N2 activation and selective NH3 production with a faster kinetic rate than the pristine TiO2. The TiO2-based nanoreactor with surface and bulk structure tailoring delivered an NH3 yield rate up to 5.50 μgh-1cm-2 (16.67 μgh-1 mgcat-1) and high faradaic effi- ciency of 26 % under ambient aqueous conditions Our findings highlight the concept of lattice strain and geometry modified nanoreactors, which will have broad implications in the renewable energy catalysis and electrosynthesis of valuable products. © 2020 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

关键词： Nitrogen fixation

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Surface engineering Strategy to Synthesize Bicomponent Carbons for Rechargeable Zinc-Air Batteries

SSRN

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SSRN 2024年

作者： An, Jia-Xing Meng, Yu Fang, Lingzhe Lyu, Zhaoyuan Tang, Selene Li, Tao Liu, Chang Shin, Hamin Lee, Jiyoung Ding, Shichao Kim, Il-Doo Li, Jin-Cheng Faculty of Chemical Engineering Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials Kunming University of Science and Technology Kunming650500 China Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang110016 China Department of Chemistry and Biochemistry Northern Illinois University 1425 W. Lincoln Hwy. DeKalbIL60115 United States School of Mechanical and Materials Engineering Washington State University PullmanWA99164 United States Department of Nanoengineering University of California San Diego La Jolla CA92093 United States X-ray Science Division Argonne National Laboratory 9700 South Cass Avenue LemontIL60439 United States 291 Daehak-ro Yuseong-gu Daejeon34141 Korea Republic of Department of Chemical and Biological Engineering Northwestern University EvanstonIL60208 United States Kunming University of Science and Technology China

Atomic Fe-Nx moieties and nanosized FeCo species anchored on carbons have respectively demonstrated to be one of the best active parts for oxygen reduction and evolution reactions (ORR/OER) in rechargeable zinc-air batteries (ZABs). However, achieving these two parts in a catalyst is a great challenge due to the trade-off in formation between them during high-temperature preparation. Herein, we integrate them into a bicomponent carbon through surface engineering strategy. Within this process, K3[Fe(CN)6] is engineered on the surface of a precursor mixture consisting of polyaniline-coated graphene oxide and ZIF-67. This is followed by pyrolysis to achieve the bicomponent carbon catalyst of FeCo nanoparticles modified carbon polyhedron (for accelerating the OER), supported on atomically dispersed Fe-N-doped carbon nanosheet (for boosting the ORR). The catalyst exhibits a small potential gap of 0.69 V for OER/ORR. In situ Raman spectroscopy demonstrates that spinel FeCo oxides can be responsible for OER. When used in ZABs, high power densities of 225 mW cm-2 in aqueous electrolyte and 164 mW cm-2 in solid-state electrolyte as well as a small and stable voltage gap of 0.712 V at 10 mA cm-2 after 1035 discharge-charge cycles are achieved, demonstrating the great application potential in energy devices. © 2024, The Authors. All rights reserved.

关键词： Oxygen

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Alloyed β-(AlxGa1-x)2O3 Bulk Czochralski Single β-(Al0.1Ga0.9)2O3 and Polycrystals β-(Al0.33Ga0.66)2O3, β-(Al0.5Ga0.5)2O3) and Property Trends

arXiv

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arXiv 2022年

作者： Jesenovec, Jani Dutton, Benjamin Stone-Weiss, Nicholas Chmielewski, Adrian Saleh, Muad Peterson, Carl Alem, Nasim Krishnamoorthy, Sriram McCloy, John S. Institute of Materials Research Washington State University PullmanWA99164-2711 United States Materials Science & Engineering Program Washington State University PullmanWA99164 United States Department of Materials Science and Engineering Materials Research Institute The Pennsylvania State University University Park United States Materials Department University of California Santa BarbaraCA93106 United States

In this work, bulk Czochralski-grown single crystals of 10 mol.% Al2O3 alloyed β-Ga2O3 – monoclinic 10% AGO or β-(Al0.1Ga0.9)2O3 – are obtained, which show +0.20 eV increase in the bandgap compared to unintentionally doped β-Ga2O3. Further, growths of 33% AGO – β-(Al0.33Ga0.67)2O3 – and 50% AGO – β-(Al0.5Ga0.5)2O3 or β-AlGaO3 – produce polycrystalline single-phase monoclinic material (β-AGO). All three compositions are investigated by X-ray diffraction (XRD), Raman spectroscopy, optical absorption, and 27Al nuclear magnetic resonance (NMR). By investigating single phase β-AGO over a large range of Al2O3 concentration (10-50 mol.%), broad trends in lattice parameter, vibrational modes, optical band gap, and crystallographic site preference are determined. All lattice parameters show a linear trend with Al incorporation. According to NMR, aluminum incorporates on both crystallographic sites of bGa2O3, with a slight preference for the octahedral (GaII) site, which becomes more disordered with increasing Al. Single crystals of 10% AGO were also characterized by X-ray rocking curve, transmission electron microscopy, purity (glow discharge mass spectroscopy, X-ray fluorescence), optical transmission (200 nm – 20 µm wavelengths), and resistivity. These measurements suggest that electrical compensation by impurity acceptor doping is not the likely explanation for high resistivity, but rather the shift of a hydrogen level from a shallow donor to a deep acceptor due to Al alloying. Bulk crystals of β-(Al0.1Ga0.9)2O3 have the potential to be ultra-wide bandgap substrates for thin film growth, with a lattice parameter that may even allow higher Al concentration β-Ga2O3 single crystal thin films to be grown. Copyright © 2022, The Authors. All rights reserved.

关键词： Energy gap

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Colorimetric Metasurfaces for Quantitative, On-Chip Tissue Diagnostics

Colorimetric Metasurfaces for Quantitative, On-Chip Tissue D...

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CLEO: science and Innovations, S and I 2022

作者： Poulikakos, L.V. Bordy, S. Byun, J. Haddadin, Z. Kirya, P. Khan, S. Kim, D.Y. Hochberg, J. Pokorski, J.K. Lawrence, M. Barton, D.R. Jeffrey, S.S. Dionne, J.A. University of California Department of Mechanical and Aerospace Engineering 9500 Gilman Drive La Jolla San DiegoCA92093 United States University of California Department of Nanoengineering 9500 Gilman Drive La Jolla San DiegoCA92093 United States Washington University St. Louis Department of Electrical and Systems Engineering 1 Brookings Drive St. LouisMO63130-4899 United States Harvard University School of Engineering and Applied Sciences 150 Western Ave BostonMA02134 United States Stanford University Department of Surgery 300 Pasteur Drive StanfordCA94305 United States Stanford University Department of Materials Science and Engineering 496 Lomita Mall StanfordCA94305 United States

ISBN: (纸本)9781557528209

We leverage the unique properties of anisotropic, colorimetric metasurfaces to selectively visualize disease-relevant fiber density and orientation in biological tissue, paving the way toward rapid, precise and low-cost diagnostics ranging from cancer to neurodegenerative disease. © Optica Publishing Group 2022, © 2022 The Author(s)

关键词： Neurodegenerative diseases

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Antitumor efficacy and potential mechanism of FAP-targeted radioligand therapy combined with immune checkpoint blockade

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Signal Transduction and Targeted Therapy 2024年第7期9卷 2936-2952页

作者： Liang Zhao Yizhen Pang Yangfan Zhou Jianhao Chen Hao Fu Wei Guo Weizhi Xu Xin Xue Guoqiang Su Long Sun Hua Wu Jingjing Zhang Zhanxiang Wang Qin Lin Xiaoyuan Chen Haojun Chen Department of Nuclear Medicine and Minnan PET Center Xiamen Key Laboratory of RadiopharmaceuticalsThe First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen UniversityXiamenChina Departments of Diagnostic Radiology SurgeryChemical and Biomolecular Engineeringand Biomedical EngineeringYong Loo Lin School of Medicine and College of Design and EngineeringNational University of SingaporeSingaporeSingapore Clinical Imaging Research Centre Centre for Translational MedicineYong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore Department of Radiation Oncology Xiamen Cancer CenterXiamen Key Laboratory of Radiation OncologyThe First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen UniversityXiamenChina Department of Colorectal Tumor Surgery Xiamen Cancer CenterXiamen Key Laboratory of Radiation OncologyThe First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen UniversityXiamenChina Department of Cardiothoracic Surgery Zhongda HospitalSchool of MedicineSoutheast UniversityNanjingChina Nanomedicine Translational Research Program NUS Center for NanomedicineYong Loo Lin School of MedicineNational University of SingaporeSingaporeSingapore Department of Neurosurgery and Department of Neuroscience Fujian Key Laboratory of Brain Tumors Diagnosis and Precision TreatmentXiamen Key Laboratory of Brain Centerthe First Affiliated Hospital of Xiamen UniversitySchool of MedicineXiamen UniversityXiamenChina Institute of Molecular and Cell Biology Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth MaterialsHaixi InstituteChinese Academy of SciencesXiamenChina

Radiotherapy combined with immune checkpoint blockade holds great promise for synergistic antitumor *** radionuclide therapy delivers radiation directly to tumor ***1004 is a fibroblast activation protein(FAP)-targeting radiopharmaceutical,conjugated with the albumin binder Evans Blue,which has demonstrated enhanced tumor uptake and retention in previous preclinical and clinical ***,we demonstrate that^(68)Ga/^(177)Lu-labeled LNC1004 exhibits increased uptake and prolonged retention in MC38/NIH3T3-FAP and CT26/NIH3T3-FAP tumor *** therapy with^(177)Lu-LNC1004 induced a transient upregulation of PD-L1 expression in tumor *** combination of^(177)Lu-LNC1004 and anti-PD-L1 immunotherapy led to complete eradication of all tumors in MC38/NIH3T3-FAP tumor-bearing mice,with mice showing 100%tumor rejection upon ***,single-cell RNA sequencing(scRNA-seq),and TCR sequencing revealed that combination therapy reprogrammed the tumor microenvironment in mice to foster antitumor immunity by suppressing malignant progression and increasing cell-to-cell communication,CD8^(+)T-cell activation and expansion,M1 macrophage counts,antitumor activity of neutrophils,and T-cell receptor diversity.A preliminary clinical study demonstrated that^(177)Lu-LNC1004 was well-tolerated and effective in patients with refractory ***,scRNA-seq of peripheral blood mononuclear cells underscored the importance of addressing immune evasion through immune checkpoint blockade *** was emphasized by the observed increase in antigen processing and presentation juxtaposed with T cell *** conclusion,our data supported the efficacy of immunotherapy combined with^(177)Lu-LNC1004 for cancer patients with FAP-positive tumors.

关键词： immunity retention holds

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