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Pt_(1)/Ni_(6)Co_(1)layered double hydroxides/N-doped graphene for electrochemical non-enzymatic glucose sensing by synergistic enhancement of single atoms and doping

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Nano Research 2023年第1期16卷 318-324页

作者： Baojun Long Peiyu Cao Yuanmeng Zhao Qianqian Fu Yan Mo Yueming Zhai Juejing Liu Xingyi Lyu Tao Li Xiaofeng Guo Changsheng Shan Minghua Zeng Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules College of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China The Institute for Advanced Studies(IAS) Wuhan UniversityWuhan 430072China Material Science and Engineering Program Washington State UniversityPullmanWA 99164USA Department of Chemistry and Alexandra Navrotsky Institute for Experimental Thermodynamics Washington State UniversityPullmanWA 99164USA X-ray Science Division Argonne National LaboratoryArgonneIL 60439USA Department of Chemistry and Biochemistry Northern Illinois UniversityDeKalbIL 60115USA

The development of novel single-atom catalysts is important for highly efficient electrochemical catalysis and *** this work,a novel Pt single atoms(SAs)supported on Ni_(6)Co_(1)layered double hydroxides/nitrogen-doped graphene(Pt_(1)/Ni_(6)Co_(1)LDHs/NG)was constructed for electrochemical enzyme-free catalysis and sensing towards *** loading of Pt single atoms increases with doping of Co atoms that generate more anchoring sites for Pt *** resulting Pt_(1)/Ni_(6)Co_(1)LDHs/NG exhibits low oxidative potential of 0.440 V with high sensitivity of 273.78μA·mM^(−1)·cm^(−2)toward glucose,which are 85 mV lower and 15 times higher than those of Ni(OH)_(2),***_(1)/Ni_(6)Co_(1)LDHs/NG also shows excellent selectivity and great stability during 5-week *** and experimental results show that the boosted performance of Pt_(1)/Ni_(6)Co_(1)LDHs/NG originates from its stronger binding energy with glucose and the synergistic effect of Pt SAs,Co doping,and *** work provides a general strategy of designing highly active SACs for extending their application in electrochemical sensing.

关键词： single-atom catalysts electrochemical sensor layered double hydroxides nitrogen-doped graphene synergistic effect

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ENHANCING THE ELECTROCATALYTIC HYDROGEN EVOLUTION ACTIVITY OF BARE COPPER ELECTRODES THROUGH ULTRAFAST FEMTOSECOND LASER NANOSTRUCTURING 23

ENHANCING THE ELECTROCATALYTIC HYDROGEN EVOLUTION ACTIVITY O...

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23rd World Hydrogen Energy Conference: Bridging Continents by H2, WHEC 2022

作者： Ahmad, Shahbaz Egilmez, Mehmet Orhan, Mehmet F. Alnaser, Ali S. Material Science and Engineering Program American University of Sharjah Sharjah United Arab Emirates Department of Physics American University of Sharjah Sharjah United Arab Emirates Department of Mechanical Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9786250008430

In this study, we report on enhancing the surface area of bare copper electrodes via femtosecond laser processing for its application in alkaline water electrolysis. It is shown that the laser nanostructuring process creates unique and hierarchal nanostructures superimposed over spiky microstructures. Analysing the effect of various laser parameters indicate that scanning speed greatly effects the microstructures by decreasing its dimensions and increasing porosity. The results also shows that laser processing has significantly enhanced the surface area with spiky and superhydrophilic structures. Furthermore, this process is expected to improve the hydrogen evolution reaction (HER) kinetics by allowing more electrode to electrolyte interface, which can favor the enrichment and formation of protons on structured Cu cathode. © 2022 Proceedings of WHEC 2022 - 23rd World Hydrogen Energy Conference: Bridging Continents by H2. All rights reserved.

关键词： Femtosecond lasers

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Non-Hermitian selective thermal emitter for thermophotovoltaics

Non-Hermitian selective thermal emitter for thermophotovolta...

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2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Prasad, Ciril S. Raphaelson, Samuel C. Naik, Gururaj V. Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Material Science and NanoEngineering Rice University HoustonTX United States

ISBN: (纸本)9781957171258

Selective thermal emitters can boost the efficiency of heat-to-electricity conversion in thermophotovoltaic systems only if their spectral selectivity is high. We demonstrate a non-Hermitian metasurface-based selective emitter operating at 1200 K in a GaSb-thermophotovoltaic cell. © Optica Publishing Group 2023 © 2023 The Author(s)

关键词： III-V semiconductors

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The Moment of Calcium Nitrate Addition to a Sol-Gel Synthesis Affects the Microstructure and Biological Performance of the Bioactive Glass

SSRN

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SSRN 2023年

作者： Oliveira, Jéssica Fernanda Ribeiro de Oliveira Filho, Ulisses Aparecido Rocha, Ana Julia Silva dos Santos, Hericles Campos Barreto, Ledjane Silva dos Santos, Euler Araujo Graduation Program of Material Science and Engineering Federal University of Sergipe SE São Cristóvão49100-000 Brazil

The inherent mineralization of hydroxyapatite during the synthesis of sol-gel-derived bioactive glasses has been frequently reported in the literature. To date, there is no consensus on how this mineralization occurs and how it can affect the subsequent biological behavior of the glass. In this research, we explored how the time at which the calcium precursor is added to a sol-gel synthesis affects this initial mineralization process and the consequent bioactivity and protein adsorption. It was demonstrated that late addition of the calcium nitrate (after alkoxide hydrolysis) produced a heterogeneous microstructure in which Ca2+-rich regions (nanocrystalline hydroxyapatite) formed among a less polymerized and more reactive silica network. This devitrification-like process during the synthesis resulted in increasing bioactivity and albumin adsorption. Therefore, the bioactivity of a 58S glass and its protein adsorption capacity can be modulated by choosing the moment at which calcium nitrate is added relative to the other alkoxide precursors in a sol-gel synthesis. © 2023, The Authors. All rights reserved.

关键词： Bioactivity

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Microstructural and Interfacial Characteristics of Supersonic/Kinetically Reclaimed 2024al-T3 Substrate Using Cold Sprayed 2024al Deposit

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SSRN 2024年

作者： Zhong, Yuan Zhang, Yingpeng Liu, Zhihao Ramachandran, Chidambaram Seshadri Cha, Limei Wang, Qun College of Materials Science and Engineering Hunan University Hunan Changsha410082 China The Material Science and Engineering Program Guangdong Technion Israel Institute of Technology Shantou515063 China Department of Materials Science and Engineering The State University of New York Stony BrookNY11794 2275 United States

This work systematically investigated the microstructure and interfacial characteristics of cold sprayed (CS) 2024Al coating on 2024Al-T3 substrate. Within the internal structure of the layer, recrystallization processes induced by intense stress were seen, resulting in the formation of nanograins with sizes ranging from 30-100 nm, as well as ultrafine grains with sizes ranging from 100-300 nm. Different bonding modes of splat/splat, including mechanical bonding, mechanical interlocking, and metallurgical bonding, have been found at the interface between splat/substrate. There were no apparent pores and gaps between the particles in the mechanical bonding area and between the coating and the substrate. In regions of metallurgical bonding, adiabatic shear instability promoted the occurrence of continuous dynamic recrystallization (CDRX) on the one hand, leading to viscous flow of local materials, which damaged the original splat/substrate bonding surface and generating new bonding surfaces, on the other hand, promoted atomic diffusion between the coating and the substrate, allowing a close lattice match formed at the splat/substrate interface. Therefore, the CS 2024Al coating exhibited excellent comprehensive properties with a porosity level of 0.31±0.09%, a hardness of 143.4 HV0.025, and an adhesion/cohesion strength exceeding 55.5 MPa. These properties were derived from the strong bonding among splats and between the splats and the substrate. © 2024, The Authors. All rights reserved.

关键词： Shear flow

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Attributional life cycle assessment of recycling and disposal strategies for construction and demolition waste

Cleaner Environmental Systems

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Cleaner Environmental Systems 2025年 18卷

作者： Kanwal, Qudsia Xu, Guochang Gari, Ziad Alhusainan, Ream S. Al-Ghamdi, Sami G. Environmental Science and Engineering Program Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia KAUST Climate and Livability Initiative King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia Material Cycles Division National Institute for Environmental Studies Onogawa 16-2 Tsukuba305-8506 Japan

The management of Construction and Demolition Waste (CDW) poses significant environmental challenges in Saudi Arabia, exacerbated by rapid urbanization and the Giga Projects under Vision 2030. This study presents a Life Cycle Assessment (LCA) of CDW management practices across seventeen municipalities, providing the first region-specific evaluation of environmental impacts using comprehensive data. By integrating primary and secondary data from local sources, Ecoinvent 3.91, and GaBi Sphera, the study evaluates key CDW disposal methods: sanitary landfilling, incineration, and recycling. The findings reveal that advanced recycling infrastructure (e.g., compactor trucks, recycling facilities) significantly reduces non-renewable energy use, Global Warming Potential (GWP), and downstream emissions, particularly in high CDW-generating regions like Riyadh and Jeddah. Notably, recycling achieves a GWP reduction of up to 75 million kg CO2-eq annually for key materials like mixed soil and concrete. Furthermore, the study contributes to global CDW management literature by presenting a replicable LCA framework that can be applied to other rapidly urbanizing economies facing similar waste management challenges. This framework offers valuable insights for policymakers, urban planners, and researchers seeking to develop sustainable CDW management strategies aligned with circular economy principles and international sustainability goals. © 2025 The Authors

关键词： Project management

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Development of a novel quality control indicator for coffee roasting based on the digitalization of smell by a portable electronic nose

Development of a novel quality control indicator for coffee ...

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International Joint Conference on Computer science and Software engineering (JCSSE)

作者： Varanya Somaudon Pathapee Sakuldee Teerakiat Kerdcharoen Faculty of Science Materials Science and Engineering Program Mahidol University Bangkok Thailand School of Science Material Engineering Mae Fah Luang University Chiang rai Thailand Department of Physics Faculty of Science Mahidol University Bangkok Thailand

Northern Thailand is home to several Arabica coffee-growing regions, including Mae-kampong, Teentok, Mae-lord, and Monngo Valleys, whose coffees are featured throughout this study. These coffees have distinct aromas and flavors due to their varied cultivation locations, which are influenced by unique climatic conditions. The purpose of this paper is to comprehend the aroma of coffees brought from various locations and roasted under the same conditions. Our lab-made electronic nose (e-nose) was used to digitalize and analyze the smell of coffee. In order to monitor the coffee scent throughout roasting and assess how similar the aromas of coffee samples taken from various locations are to one another, principal component analysis and hierarchical cluster analysis were used. It was found that our e-nose system is an effective tool for determining the geo-location of the coffee origin as well as for quality control of coffee production.

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Imaging atomic-scale chemistry from fused multi-modal electron microscopy

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npj Computational materials 2022年第1期8卷 164-171页

作者： Jonathan Schwartz Zichao Wendy Di Yi Jiang Alyssa J.Fielitz Don-Hyung Ha Sanjaya D.Perera Ismail El Baggari Richard D.Robinson Jeffrey A.Fessler Colin Ophus Steve Rozeveld Robert Hovden Department of Materials Science and Engineering University of MichiganAnn ArborMIUSA Mathematics and Computer Science Division Argonne National LaboratoryLemontILUSA Advanced Photon Source Facility Argonne National LaboratoryLemontILUSA Dow Chemical Co. MidlandMIUSA Department of Material Science and Engineering Cornell UniversityIthacaNew YorkUSA School of Integrative Engineering Chung-Ang UniversitySeoulRepublic of Korea Department of Physics Cornell UniversityIthacaNYUSA The Rowland Institute at Harvard CambridgeMAUSA Department of Electrical Engineering and Computer Science University of MichiganAnn ArborMIUSA National Center for Electron Microscopy Lawrence Berkeley National LaboratoryMolecular FoundryBerkeleyCAUSA Applied Physics Program University of MIchiganAnn ArborMIUnited States

Efforts to map atomic-scale chemistry at low doses with minimal noise using electron microscopes are fundamentally limited by inelastic ***,fused multi-modal electron microscopy offers high signal-to-noise ratio(SNR)recovery of material chemistry at nano-and atomic-resolution by coupling correlated information encoded within both elastic scattering(high-angle annular dark-field(HAADF))and inelastic spectroscopic signals(electron energy loss(EELS)or energy-dispersive x-ray(EDX)).By linking these simultaneously acquired signals,or modalities,the chemical distribution within nanomaterials can be imaged at significantly lower doses with existing detector *** many cases,the dose requirements can be reduced by over one order of *** high SNR recovery of chemistry is tested against simulated and experimental atomic resolution data of heterogeneous nanomaterials.

关键词： materials chemistry fused

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Short Wave Infrared Upconversion Imager with Electron Blocking Layer to Screen Electron Injection into Photosensitive Layer

Short Wave Infrared Upconversion Imager with Electron Blocki...

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IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)

作者： Chanho Shin Ning Li Tse Nga Ng Material Science and Engineering Program University of California San Diego La Jolla USA Department of Electrical and Computer Engineering University of California San Diego La Jolla USA

In this work, we demonstrated upconversion imagers integrated with shortwave infrared photodetectors paired with an electron blocking layer. The use of electron blocking layer screened charge injection to prevent recombination in photosensitive layer. The characteristics of each electron blocking layer were analyzed in aspects of noise and detectivity. For the optimized device, the parasitic luminance in the dark was efficiently suppressed, and the photon-to-photon efficiency was increased. The electron blocking layer used in this work is generally applicable for upconversion imagers using different absorption and emitting materials.

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Adulteration Detection of Glycol in Medical Grade Solvents Using the CSRR Loaded Stepped Coplanar Waveguide

Adulteration Detection of Glycol in Medical Grade Solvents U...

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Microwaves Antennas and Propagation Conference (MAPCON)

作者： Ankita Kumari Prakrati Azad Abhishek Kumar M. Jaleel Akhtar Dept. of Electrical Engineering Indian Institue of Teechnology Kanpur Kanpur India Material Science Program Indian Institue of Teechnology Kanpur Kanpur India

This study presents a novel CSRR-loaded stepped-CPW sensor to detect adulteration levels of glycol in medical-grade solvents. The proposed RF system comprising the stepped-CPW resonant sensor and specially designed molded glass capillary tube as a sample holder, is well suited for detecting small levels of adulteration in bio-grade glycerol. The main advantage of the proposed sensor is its strong field confinement in the sensing region, defined in terms of the shift in the resonance frequency resulting from changes in the dielectric constant. It is demonstrated that the two-ring CSRR topology, excited by the stepped-CPW and designed on a 0.8 mm thick FR-4 substrate operating at 8 GHz, provides improved sensitivity and high Q-factor compared to its single-ring counterpart. The proposed sensor is tested to detect the adulteration level of EG in medical glycerol. Various adulteration levels of EG in glycerol can be detected using the proposed device due to a substantial shift in the resonant frequency with even a small change in the adulteration level. This study introduces a comprehensive theoretical framework, including vital factors to be considered during the design phase, and explores the usage of the proposed sensor for quality monitoring of various types of medical-grade fluids.

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