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Aerosol jet printing of surface acoustic wave microfluidic devices

Microsystems & Nanoengineering 2024年第1期10卷 231-242页

作者： Joseph Rich Brian Cole Teng Li Brandon Lu Hanyu Fu Brittany N.Smith Jianping Xia Shujie Yang Ruoyu Zhong James L.Doherty Kanji Kaneko Hiroaki Suzuki Zhenhua Tian Aaron D.Franklin Tony Jun Huang department of Biomedical engineering Duke UniversityDurhamNC 27708USA department of Electrical and Computer engineering Duke UniversityDurhamNC 27708USA department of mechanical engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA thomas lord department of mechanical engineering and materials science Duke UniversityDurhamNC 27708USA Deptartment of Precision Mechanics Faculty of Science and EngineeringChuo UniversityTokyo 112-8551Japan department of Chemistry Duke UniversityDurhamNC 27708USA

The addition of surface acoustic wave(SAW)technologies to microfluidics has greatly advanced lab-on-a-chip applications due to their unique and powerful attributes,including high-precision manipulation,versatility,integrability,biocompatibility,contactless nature,and rapid ***,the development of SAW microfluidic devices is limited by complex and time-consuming micro/nanofabrication techniques and access to cleanroom facilities for multistep photolithography and vacuum-based *** simplify the fabrication of SAW microfluidic devices with customizable dimensions and functions,we utilized the additive manufacturing technique of aerosol jet *** successfully fabricated customized SAW microfluidic devices of varying materials,including silver nanowires,graphene,and poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS).To characterize and compare the acoustic actuation performance of these aerosol jet printed SAW microfluidic devices with their cleanroom-fabricated counterparts,the wave displacements and resonant frequencies of the different fabricated devices were directly measured through scanning laser Doppler ***,to exhibit the capability of the aerosol jet printed devices for lab-on-a-chip applications,we successfully conducted acoustic streaming and particle concentration ***,we demonstrated a novel solution-based,direct-write,single-step,cleanroom-free additive manufacturing technique to rapidly develop SAW microfluidic devices that shows viability for applications in the fields of biology,chemistry,engineering,and medicine.

关键词： printing wave fluid

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Designing electrodes and electrolytes for batteries by leveraging deep learning

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Nano Research Energy 2024年第2期3卷 83-99页

作者： Chenxi Sui Ziyang Jiang Genesis Higueros David Carlson Po-Chun Hsu Pritzker School of Molecular engineering University of ChicagoChicagoIL 60637USA Civil and Environmental engineering Duke UniversityDurhamNC 27708USA thomas lord department of mechanical engineering and materials science Duke UniversityDurhamNC 27708USA

High-performance batteries are poised for electrification of vehicles and therefore mitigate greenhouse gas emissions,which,in turn,promote a sustainable ***,the design of optimized batteries is challenging due to the nonlinear governing physics and *** advancements have demonstrated the potential of deep learning techniques in efficiently designing batteries,particularly in optimizing electrodes and *** review provides comprehensive concepts and principles of deep learning and its application in solving battery-related electrochemical problems,which bridges the gap between artificial intelligence and *** also examine the potential challenges and opportunities associated with different deep learning approaches,tailoring them to specific battery ***,we aim to inspire future advancements in both fundamental scientific understanding and practical engineering in the field of battery ***,we highlight the potential challenges and opportunities for different deep learning methods according to the specific battery demand to inspire future advancement in fundamental science and practical engineering.

关键词： battery design fast-charging battery three-dimensional(3D)structure deep learning optimization

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Dynamics of self-hybridized exciton–polaritons in 2D halide perovskites

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Light(science & Applications) 2024年第1期13卷 13-22页

作者： Surendra B.Anantharaman Jason Lynch Christopher E.Stevens Christopher Munley Chentao Li Jin Hou Hao Zhang Andrew Torma thomas Darlington Francis Coen Kevin Li Arka Majumdar PJames Schuck Aditya Mohite Hayk Harutyunyan Joshua R.Hendrickson Deep Jariwala department of Electrical and Systems engineering University of PennsylvaniaPhiladelphiaPA19104USA KBR Inc. BeavercreekOH45431USA Air Force Research Laboratory Sensors DirectorateWright-Patterson Air Force BaseOH45433USA department of Physics University of WashingtonSeattleWA98195USA department of Physics Emory UniversityAtlantaGA30322USA department of Chemical and Biomolecular engineering Rice UniversityHoustonTX77005USA department of materials science and Nanoengineering Rice UniversityHoustonTX77005USA Applied Physics Program Smalley‐Curl InstituteRice UniversityHoustonTX77005USA department of mechanical engineering Columbia UniversityNew YorkNY10027USA department of Electrical and Computer engineering University of WashingtonSeattleWA98195USA

Excitons,bound electron–hole pairs,in two-dimensional hybrid organic inorganic perovskites(2D HOIPs)are capable of forming hybrid light-matter states known as exciton-polaritons(E–Ps)when the excitonic medium is confined in an optical *** the case of 2D HOIPs,they can self-hybridize into E–Ps at specific thicknesses of the HOIP crystals that form a resonant optical cavity with the ***,the fundamental properties of these self-hybridized E–Ps in 2D HOIPs,including their role in ultrafast energy and/or charge transfer at interfaces,remain ***,we demonstrate that>0.5µm thick 2D HOIP crystals on Au substrates are capable of supporting multiple-orders of self-hybridized E–P *** E–Ps have high Q factors(>100)and modulate the optical dispersion for the crystal to enhance sub-gap absorption and *** varying excitation energy and ultrafast measurements,we also confirm energy transfer from higher energy E–Ps to lower energy E–***,we also demonstrate that E–Ps are capable of charge transport and transfer at *** findings provide new insights into charge and energy transfer in E–Ps opening new opportunities towards their manipulation for polaritonic devices.

关键词： charge polar excitation

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Change of Electrical and Transport Properties of Nickel Oxide by Carrier Concentration and Temperature through First‑Principle Calculations

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Nanomanufacturing and Metrology 2023年第4期6卷 109-118页

作者： Nayem Md.Reza Shah Chang‑Dong Yeo Minyeong Choi Yang‑Ki Hong Jeong H.You department of mechanical engineering Texas Tech UniversityLubbockTX 79409USA department of Electrical and Computer engineering and Material science Ph.D.Program The University of AlabamaTuscaloosaAL 35487USA department of mechanical engineering School of EngineeringUniversity of St.ThomasSt.PaulMN 55105USA

Nickel is typically used as one of the main components in electrical contact devices or *** oxide(NiO)is usually formed on the surfaces of electrodes and can negatively impact system performance by introducing electrical contact *** thermal,electrical,and transport properties of NiO,as a Mott insulator or a p-type semiconductor,can be altered by operating and environmental conditions such as temperature and stress/strain by *** this study,we inves-tigate the fundamental material properties of NiO through the first-principle ***,we obtain and compare the lattice parameter,magnetic moment,and electronic structure for NiO via the WIEN2K simulations with four different poten-tials(i.e.,GGA,GGA+U,LSDA,and LSDA+U).Then,using the WIEN2K simulation results with LSDA+U potential that produces a highly accurate bandgap for NiO,we calculate the electrical conductivity and electrical part of the thermal conductivity of nickel and NiO as a function of temperature and carrier concentration through the BoltzTraP *** simulation results revealed that the electrical conductivity relative to the relaxation time for NiO increases with the carrier concentration,while it shows a slightly decreasing trend with temperature under a fixed carrier *** contrast,the electrical part of the thermal conductivity shows an increasing trend considering carrier concentration and temperature.

关键词： Nickel oxide Magnetic moments Density of states Seebeck coefcient Electrical conductivity

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An acoustofluidic scanning nanoscope using enhanced image stacking and processing

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Microsystems & Nanoengineering 2022年第4期8卷 191-198页

作者： Geonsoo Jin Joseph Rich Jianping Xia Albert JHe Chenglong Zhao Tony Jun Huang thomas lord department of mechanical engineering and Material science Duke UniversityDurhamNC 27708USA department of Biomedical engineering Duke UniversityDurhamNC 27708USA department of Physics University of Dayton300 College ParkDaytonOH 45469USA department of Electro-Optics and Photonics University of Dayton300 College ParkDaytonOH 45469USA

Nanoscale optical resolution with a large field of view is a critical feature for many research and industry areas,such as semiconductor fabrication,biomedical imaging,and nanoscale material *** scanning microscopes have been developed to resolve the inverse relationship between the resolution and field of view;however,those scanning microscopes still rely upon fluorescence labeling and complex optical *** overcome these limitations,we developed a dual-camera acoustofluidic nanoscope with a seamless image merging algorithm(alphablending process).This design allows us to precisely image both the sample and the microspheres simultaneously and accurately track the particle path and ***,the number of images required to capture the entire field of view(200×200μm)by using our acoustofluidic scanning nanoscope is reduced by 55-fold compared with previous ***,the image quality is also greatly improved by applying an alpha-blending imaging technique,which is critical for accurately depicting and identifying nanoscale objects or *** dual-camera acoustofluidic nanoscope paves the way for enhanced nanoimaging with high resolution and a large field of view.

关键词： image overcome stacking

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A review of the effects of forest fire on soil properties

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Journal of Forestry Research 2022年第5期33卷 1419-1441页

作者： Alex Amerh Agbeshie Simon Abugre thomas Atta-Darkwa Richard Awuah department of Environmental Management University of Energy and Natural Resources(UENR)SunyaniGhana department of Forest science University of Energy and Natural Resources(UENR)SunyaniGhana department of mechanical and Manufacturing engineering University of Energy and Natural Resources(UENR)SunyaniGhana

Forest fires are key ecosystem modifiers affecting the biological,chemical,and physical attributes of forest *** extent of soil disturbance by fire is largely dependent on fire intensity,duration and recurrence,fuel load,and soil *** impact on soil properties is intricate,yielding different results based on these *** paper reviews research investigating the effects of wildfire and prescribed fire on the biological and physico-chemical attributes of forest soils and provides a summary of current knowledge associated with the benefits and disadvantages of such ***-intensity fires with ash deposition on soil surfaces cause changes in soil chemistry,including increase in available nutrients and *** intensity fires are noted for the complete combustion of organic matter and result in severe negative impacts on forest *** intensity fires result in nutrient volatilization,the break down in soil aggregate stability,an increase soil bulk density,an increase in the hydrophobicity of soil particles leading to decreased water infiltration with increased erosion and destroy soil *** soil heating(> 120℃) from high-intensity forest fires is detrimental to the soil ecosystem,especially its physical and biological *** this regard,the use of prescribed burning as a management tool to reduce the fuel load is highly recommended due to its low intensity and limited soil ***,the use of prescribed fires to manage fuel loads is critically needed in the light of current global warming as it will help prevent increased wildfire *** review provides information on the impact of forest fires on soil properties,a key feature in the maintenance of healthy *** addition,the review should prompt comprehensive soil and forest management regimes to limit soil disturbance and restore fire-disturbed soil ecosystems.

关键词： Forest fires Low-severity fire Mineralization Soil available nutrients Soil organic matter Volatilization

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Nanophotonic catalytic combustion enlightens mid-infrared light source

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Nano Research 2023年第9期16卷 11564-11570页

作者： Zhenhua Wu Zhimao Wu Haoran Lv Wenbin Zhang Zekun Liu Shuai Zhang Erzhen Mu Hengxin Lin Qing Zhang Daxiang Cui thomas Thundat Zhiyu Hu National Key Laboratory of Advanced Micro and Nano Manufacture Technology Shanghai Jiao Tong UniversityShanghai 200240China department of Micro/Nano Electronics Shanghai Jiao Tong UniversityShanghai 200240China School of mechanical engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of NanoMicroEnergy School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Physics University of Electronic Science and Technology of ChinaChengdu 611731China School of materials science and engineering Henan Polytechnic UniversityJiaozuo 454000China department of Instrument science and engineering Shanghai Jiao Tong UniversityShanghai 200240China department of Chemical and Biological engineering University at Buffalothe State University of New YorkNew York 14260USA

The tunable mid-infrared source in a broad-spectrum heralds great scientific implications and remains a *** catalytic combustion facilitates access to customizable infrared light ***,we report on fabricating platinumalumina bilayer nano-cylinder arrays for methanol catalytic combustion,which enables them to act as an array of infrared point light sources,with wavelength tunable by controlling the flow rate of methanol/air *** then propose a technique of integrating nanophotonic structures with catalytic combustion to engineer infrared light *** demonstrate a prototype of a topological photonic crystal catalyst array in which infrared emission can be enhanced significantly with highly vertical *** work establishes a framework of nanophotonic catalytic combustion for infrared light sources.

关键词： nanophotonics catalytic combustion nano-array catalyst infrared light source

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Surface modification of biomedical Mg-Ca and Mg-Zn-Ca alloys using selective laser melting: Corrosion behaviour, microhardness and biocompatibility

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Journal of Magnesium and Alloys 2021年第6期9卷 2155-2168页

作者： Xiyu Yao Jincheng Tang Yinghao Zhou Andrej Atrens Matthew S.Dargusch Bjoern Wiese thomas Ebel Ming Yan School of materials science and engineering Harbin Institute of TechnologyHarbin 150001China department of materials science and engineering Southern University of Science and TechnologyShenzhen 518055China The University of Queensland School of Mechanical and Mining EngineeringCentre for Advanced Materials Processing and Manufacturing(AMPAM)QLD 4072 Australia Institute of materials Research Helmholtz-Zentrum GeesthachtGeesthacht 21502Germany

Magnesium alloys such as Mg–Ca and Mg–Zn–Ca are good orthopaedic materials;however their tendency to corrode is *** we utilize selective laser melting(SLM)to modify the surface of these Mg alloys to simultaneously improve the corrosion behaviour and *** corrosion rate decreased from 2.1±0.2 mm/y to 1.0±0.1 mm/y for the laser-processed Mg–0.6Ca,and from 1.6±0.1 mm/y to 0.7±0.2 mm/y for laser-processed Mg–0.5Zn–*** microhardness increased from 46±1 HV to 56±1 HV for Mg–0.6Ca,and from 47±3 HV to 55±3 HV for Mg–0.5Zn–*** addition,good biocompatibility remained in the laser processed Mg *** improved properties are attributed to laser-induced grain refinement,confined impurity elements,residual stress,and modified surface *** results demonstrated the potential of SLM as a surface engineering approach for developing advanced biomedical Mg alloys.

关键词： Mg alloys Selective laser melting Surface modification Corrosion behaviour Microhardness

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In vitro and in vivo study on fine-grained Mg-Zn-RE-Zr alloy as a biodegradeable orthopedic implant produced by friction stir processing

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Bioactive materials 2023年第10期28卷 448-466页

作者： Vasanth C.Shunmugasamy Marwa AbdelGawad Muhammad Umar Sohail Talal Ibrahim Talha Khan thomas Daniel Seers Bilal Mansoor mechanical engineering Program Texas A&M University at QatarEducation CityDohaQatar department of mechanical engineering Texas A&M University3123 TAMUCollege StationTX 77843USA Proteomics Core Weill Cornell MedicineEducation CityDohaQatar department of Surgery Division of Orthopedic SurgerySidra MedicineDohaQatar Clinical Orthopedic Surgery Weill Cornell MedicineEducation CityDohaQatar Petroleum engineering Program Texas A&M University at QatarEducation CityDohaQatar department of materials science and engineering Texas A&M University3003 TAMUCollege StationTX 77843USA

Magnesium alloys containing biocompatible components show tremendous promise for applications as temporary biomedical devices. However, to ensure their safe use as biodegradeable implants, it is essential to control their corrosion rates. In concentrated Mg alloys, a microgalvanic coupling between the α-Mg matrix and secondary precipitates exists which results in increased corrosion rate. To address this challenge, we engineered the microstructure of a biodegradable Mg-Zn-RE-Zr alloy by friction stir processing (FSP), improving its corrosion resistance and mechanical properties simultaneously. The FS processed alloy with refined grains and broken and uniformly distributed secondary precipitates showed a relatively uniform corrosion morphology accompanied with the formation of a stable passive layer on the alloy surface. In vivo corrosion evaluation of the processed alloy in a small animal model showed that the material was well-tolerated with no signs of inflammation or harmful by-products. Remarkably, the processed alloy supported bone until it healed till eight weeks with a low in vivo corrosion rate of 0.7 mm/year. Moreover, we analyzed blood and histology of the critical organs such as liver and kidney, which showed normal functionality and consistent ion and enzyme levels, throughout the 12- week study period. These results demonstrate that the processed Mg-Zn-RE-Zr alloy offers promising potential for osseointegration in bone tissue healing while also exhibiting controlled biodegradability due to its engineered microstructure. The results from the present study will have profound benefit for bone fracture management, particularly in pediatric and elderly patients.

关键词： Biodegradable magnesium Bone healing Friction stir processing Microstructure Corrosion resistance

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Ultra-transparent nanostructured coatings via flow-induced one-step coassembly

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Nano materials science 2022年第2期4卷 97-103页

作者： Jingjing Liu Sonia E.Chavez Hao Ding Maria M.Farooqui Zaili Hou Sharon Lin thomas D.D'Auria Julia M.Kennedy Anna Marie LaChance Luyi Sun Polymer Program Institute of Materials ScienceUniversity of ConnecticutStorrsConnecticut06269United States department of Chemical&Biomolecular engineering University of ConnecticutStorrsConnecticut06269United States department of Biomedical engineering University of ConnecticutStorrsConnecticut06269United States

Polyvinyl alcohol(PVA)/laponite(LP)nanocomposite coatings were fabricated via a facile one-step coassembly *** formed nanocoatings contain a high concentration of LP nanosheets,which can be well aligned along the substrate surface during the coassembly *** to the highly orientated structure,the flexible nanocoatings exhibit ultra-high transparency and superior mechanical properties,and can also act as excellent gas *** nanocoatings can be exceptional candidates for a variety of applications,such as food packaging.

关键词： Nanocoating Coassembly Polyvinyl alcohol Laponite

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