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Aerosol jet printing of piezoelectric surface acousticwave thermometer

Microsystems & Nanoengineering 2023年第3期9卷 31-42页

作者： Nicholas McKibben Blake Ryel Jacob Manzi Florent Muramutsa Joshua Daw Harish Subbaraman David Estrada Zhangxian Deng Micron School of Materials Science and Engineering Boise State University1910 W University DriveBoiseID 83725USA Department of Mechanical and Biomedical Engineering Boise State UniversityBoiseID 83725USA School of Electrical Engineering and Computer Science Oregon State University2500 NW Monroe AvenueCorvallisOR 97331USA Idaho National Laboratory Idaho FallsID 83415USA Center for Advanced Energy Studies Idaho FallsID 83401USA

Surface acoustic wave(SAW)devices are a subclass of micro-electromechanical systems(MEMS)that generate an acoustic emission when electrically *** transducers also work as detectors,converting surface strain into readable electrical *** properties of the generated SAW are material dependent and influenced by external factors like *** monitoring temperature-dependent scattering parameters a SAW device can function as a thermometer to elucidate substrate *** fabrication of SAW sensors requires labor-and cost-intensive subtractive processes that produce large volumes of hazardous *** study utilizes an innovative aerosol jet printer to directly write consistent,high-resolution,silver comb electrodes onto a Y-cut LiNbO3 *** printed,two-port,20 MHz SAW sensor exhibited excellent linearity and repeatability while being verified as a thermometer from 25 to 200℃.Sensitivities of the printed SAW thermometer are−96.9×10^(−6)℃^(−1)and−92.0×10^(-6)℃^(−1) when operating in pulse-echo mode and pulse-receiver mode,*** results highlight a repeatable path to the additive fabrication of compact high-frequency SAW thermometers.

关键词： scattering wave surface

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Laser powder bed fusion of a Ni3Al-based intermetallic alloy with tailored microstructure and superior mechanical performance

Advanced Powder Materials

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Advanced Powder materials 2024年第1期3卷 90-101页

作者： Mingyu Liu Jiang Wang Tao Hu Songzhe Xu Sansan Shuai Weidong Xuan Shuo Yin Chaoyue Chen Zhongming Ren State Key Laboratory of Advanced Special Steels School of Materials Science and EngineeringShanghai UniversityShanghai 200444China Parsons Building Department of MechanicalManufacturing and Biomedical EngineeringTrinity College DublinThe University of DublinDublinIreland College of Mechanical Engineering Yangzhou UniversityYangzhou 225127China

Ni3Al-based alloys are excellent candidates for the structural materials used for turbine engines due to their excellent high-temperature *** study aims at laser powder bed fusion and post-hot isostatic pressing(HIP)treatment of Ni3Al-based IC^(-2)21 M alloy with a highγ0 volume *** as-built samples exhibits unavoidable solidification cracking and ductility dip cracking,and the laser parameter optimization can reduce the crack density to 1.34 mm/mm^(2).Transmission electron microscope(TEM)analysis reveals ultra-fine nanoscaleγ0 phases in the as-built samples due to the high cooling rate during rapid *** HIP treatment,a fully dense structure without cracking defects is achieved,which exhibits an equiaxed structure with grain size~120-180μm and irregularly shapedγ0 precipitates~1-3μm with a prominently high fraction of 86%.The room-temperature tensile test of as-built samples shows a high ultimate tensile strength(σUTS)of 1039.7 MPa and low fracture elongation of 6.4%.After HIP treatment,a significant improvement in ductility(15.7%)and a slight loss of strength(σUTS of 831.7 MPa)are obtained by eliminating the crack *** the as-built and HIP samples exhibit retained highσUTS values of 589.8 MPa and 786.2 MPa,respectively,at *** HIP samples exhibita slight decrease in ductility to~12.9%,indicating excellent high-temperature mechanical ***,the abnormal increase in strength and decrease in ductility suggest the critical role of a highγ0 fraction in cracking *** intrinsic heat treatment during repeating thermal cycles can induce brittleness and trigger cracking initiation in the heat-affected zone with notable deteriorating *** results indicate that the combination of LPBF and HIP can effectively reduce the crack density and enhance the mechanical properties of Ni_(3)Al-based alloy,making it a promising material for high-temperature applications.

关键词： Laser powder bed fusion Ni3Al-Based alloy Hot isostatic pressing Solidification cracking High-temperature tensile performance

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Challenges and opportunities in flexible,stretchable and morphable bio-interfaced technologies

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National science Review 2022年第10期9卷 10-13页

作者： Abraham Vázquez-Guardado Yiyuan Yang John A.Rogers Center for Bio-Integrated Electronics Northwestern University Querrey Simpson Institute for Bioelectronics Northwestern University Department of Mechanical Engineering Northwestern University Department of Materials Science and Engineering Northwestern University Department of Biomedical Engineering Northwestern University Department of Neurological Surgery Feinberg School of Medicine Northwestern University

Living organisms operate on the basis of dynamic biochemical processes elicited by a rich diversity of endogenous and exogenous *** higher-level forms of life,the result manifests as complex patterns of behavior and ultimately in the form of intelligence and *** classes of biocompatible electronic interfaces support expanding possibilities in bidirectional communication.

关键词：

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Fully rubbery synaptic transistors made out of all-organic materials for elastic neurological electronic skin

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Nano Research 2022年第2期15卷 758-764页

作者： Hyunseok Shim Seonmin Jang Jae Gyu Jang Zhoulyu Rao Jong-ln Hong Kyoseung Sim Cunjiang Yu Materials Science and Engineering Program University of HoustonHoustonTX 77204 USA Department of Chemistry Seoul National UniversitySeoul 08826Republic of Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Republic of Korea Department of Mechanical Engineering University of HoustonHoustonTX 77204 USA Department of Biomedical Engineering University of HoustonHoustonTX 77204USA Department of Electrical and Computer Engineering University of HoustonHoustonTX 77204 USA Texas Center for Superconductivity University of HoustonHoustonTX 77204USA

Neurologic function implemented soft organic electronic skin holds promise for wide range of applications,such as skin prosthetics,neurorobot,bioelectronics,human-robotic interaction(HRI),***,we report the development of a fully rubbery synaptic transistor which consists of all-organic materials,which shows unique synaptic characteristics existing in biological *** synaptic characteristics retained even under mechanical stretch by 30%.We further developed a neurological electronic skin in a fully rubbery format based on two mechanoreceptors(for synaptic potentiation or depression)of pressure-sensitive rubber and an all-organic synaptic *** converting tactile signals into Morse Code,potentiation and depression of excitatory postsynaptic current(EPSC)signals allow the neurological electronic skin on a human forearm to communicate with a robotic *** collective studies on the materials,devices,and their characteristics revealed the fundamental aspects and applicability of the all-organic synaptic transistor and the neurological electronic skin.

关键词： synaptic transistor stretchable electronic skin all-organic

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Janus orthogonal nanofiber membrane containing CPP@PDA for skull base reconstruction

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Journal of materials science & Technology 2025年第1期204卷 314-327页

作者： Xiaomei Xia Ziyang Liu Hongshui Wang Yazhou Hu Werner E.G.Müller Xiaohong Wang Kun Qin Jiantao Zheng Huan Zhou Lei Yang Chunyong Liang School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Center for Health Science and Engineering Hebei Key Laboratory of Biomaterials and Smart TheranosticsSchool of Health Sciences and Biomedical EngineeringHebei University of TechnologyTianjin 300131China Department of Orthopedics Tianjin HospitalTianjin 300299China ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry University Medical Center of the Johannes Gutenberg UniversityDuesbergweg 6D-55128 MainzGermany Department of Neurosurgery Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510180China

In neurosurgery procedures,cerebrospinal fluid leakage is a commonly encountered ***-constructing skull base defects with patch materials can reduce the risk of cerebrospinal fluid leakage which can lead to serious issues such as infection,meningitis,arachnoiditis,and delayed wound *** ideal skull base reconstruction material should not only serve as a leak-proof barrier but also pro-mote skull base bone *** fulfill this challenge,this research designed and fabricated a Janus orthogonal bilayer nanofiber membrane(OPCL/PG-PCPP).The aligned PCL(APCL)nanofibers were con-stituted as the top layer to resist cerebrospinal fluid leakage,while the perpendicular PCL/gelatin(APG)fibers with calcium polyphosphate encapsulated polydopamine nanoparticles(CPP@PDA,labeled as PCPP)were designed as the bottom layer(APG-PCPP)to facilitate osteoblast migration and osteogenic *** these,APG-1%PCPP nanofibers demonstrated the most effective induction of osteogenic differentiation in bone marrow mesenchymal stem cells(rBMSCs).Subsequent in vivo animal experi-ments revealed that the bone surface area(BS),bone volume fraction(BV/TV),and number of trabec-ulae(Tb.N)in the APG-1%PCPP group were twice as high as those in the control group,which confirmed the good osteogenic ***,due to its unique leak-proof and osteoinductive properties,the OPCL/PG-PCPP membrane holds promise as an applicable skull base reconstruction material in the field of neurosurgery.

关键词： Skull base reconstruction Calcium polyphosphate Orthogonal nanofiber membrane Cell migration

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Insights into the microstructural design of high-performance Ti alloys for laser powder bed fusion by tailoring columnar prior-βgrains andα-Ti morphology

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Journal of materials science & Technology 2024年第20期187卷 156-168页

作者： S.X.Wang S.F.Li X.M.Gan R.D.K.Misra R.Zheng K.Kondoh Y.F.Yang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Science and Technology on Particle Materials Chinese Academy of SciencesBeijing 100190China Department of Metallurgical Materials and Biomedical EngineeringUniversity of TexasEl Paso TX 79968USA Joining and Welding Research Institution Osaka University11-1 MihogaokaIbarakiOsaka 567-0047Japan

A high-performance Ti-Ni-B alloy with good tensile properties and reduced mechanical anisotropy was developed by promoting the columnar to equiaxed transition(CET)of prior-βgrains and modifyingα-laths to equiaxed *** Ni and B contributed to the refinement of columnar prior-βgrains during the L→βphase transformation by generating constitutional *** with Ni,B had a su-perior capability of generating constitutional undercooling,which not only replaced a significant amount of Ni with a minor addition to reduce the formation of brittle eutectoid,but also reacted with Ti to form TiB to promote heterogeneous nucleation ofα-Ti grains during theβ→αphase *** with the restricted growth ofα-laths induced by the refinement of prior-βgrains,a fully equiaxedα-Ti structure was *** competition between the negative effect of brittle eutectoid and the positive role ofα-lath to equiaxed grain transition on the ductility of as-printed Ti-Ni-B alloys was fundamen-tally governed by the morphology of eutectoid and technically dependent on the Ni-B *** the addition was 1.2Ni-0.06B(wt.%)or less,the positive effect ofα-lath on equiaxed grain transition can effectively mitigate the issue of reduced ductility caused by brittle *** contrast,at 1.8Ni-0.09B or greater,the negative effect of eutectoid *** insights into microstructural design obtained through the aforementioned approach were presented and discussed.

关键词： Laser powder bed fusion Titanium alloys Grain refinement Powder processing Anisotropy

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Optimization of the in vitro biodegradability,cytocompatibility,and wear resistance of the AZ31B alloy by micro-arc oxidation coatings doped with zinc phosphate

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Journal of materials science & Technology 2024年第12期179卷 224-239页

作者： Chao Yang Suihan Cui Ricky KYFu Liyuan Sheng Min Wen Daokui Xu Ying Zhao Yufeng Zheng Paul KChu Zhongzhen Wu School of Advanced Materials Peking University Shenzhen Graduate SchoolShenzhen 518055China Department of Physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong Kong 999077China Shenzhen Institute Peking UniversityShenzhen 518057China PKU-HKUST Shenzhen–Hong Kong Institution Shenzhen 518057China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518055China National Engineering Research Center of Light Alloy Net Forming and State Key Laboratory of Metal Matrix Composite Shanghai Jiao Tong UniversityShanghai 200240China

As implanted bone fixation materials,magnesium(Mg)alloys have significant advantages because the density and elastic modulus are closest to those of the human bone and they can bio-degrade in the physiological ***,Mg alloys degrade too rapidly and uncontrollably thus hampering clinical *** this study,a highly corrosion-resistant zinc-phosphate-doped micro-arc oxidation(MAO)coating is prepared on the AZ31B alloy,and the degradation process is assessed in *** increasing zinc phosphate concentrations,both the corrosion potentials and charge transfer resistance of the AZ31B alloy coated with MAO coatings increase gradually,while the corrosion current densities di-minish *** tests in the simulated body fluid(SBF)reveal that the increased zinc phos-phate concentration in MAO coating decreases the degradation rate,consequently reducing the release rates of Mg^(2+)and OH-in the physiological micro-environment,which obtains the lowest weight loss of only 5.22%after immersion for 56 *** regulation of degradation provides a weak alkaline environment that is suitable for long-term cell growth and subsequent promotion of bone proliferation,differentiation,mineralization,and *** addition,the zinc-phosphate-doped MAO coat-ings show an improved wear resistance as manifested by a wear rate of only 3.81 x 10^(-5) mm^(3) N^(-1) m^(-1).The results reveal a suitable strategy to improve the properties of biodegradable Mg alloys to balance tissue healing with mechanical degradation.

关键词： Mg alloys MAO coatings Degradation regulation Cytocompatibility Wear resistance

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3D imaging reveals changes in the neurovascular architecture of the murine calvarium with aging

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Bone Research 2025年第2期13卷 463-475页

作者： Allison L.Horenberg Yunke Ren Eric Z.Zeng Alexandra N.Rindone Arvind P.Pathak Warren L.Grayson Department of Biomedical Engineering Johns Hopkins University School of MedicineBaltimoreMDUSA Translational Tissue Engineering Center Johns Hopkins University School of MedicineBaltimoreMDUSA Russell H.Morgan Department of Radiology and Radiological Sciences the Johns Hopkins University School of MedicineBaltimoreMDUSA Sidney Kimmel Comprehensive Cancer Center the Johns Hopkins University School of MedicineBaltimoreMDUSA Department of Electrical Engineering Johns Hopkins UniversityBaltimoreMDUSA Institute for Nanobiotechnology Johns Hopkins UniversityBaltimoreMDUSA Department of Materials Science and Engineering Johns Hopkins UniversityBaltimoreMDUSA Department of Chemical and Biomolecular Engineering Johns Hopkins UniversityBaltimoreMDUSA

Calvarial nerves,along with vasculature,influence skull formation during development and following injury,but it remains unclear how calvarial nerves are spatially distributed during postnatal growth and *** the spatial distribution of nerves in the skull remains a challenge due to a lack of methods to quantify 3D structures in intact *** visualize calvarial 3D neurovascular architecture,we imaged nerves and endothelial cells with lightsheet microscopy.

关键词： endothelial cells calvarial nervesalong D imaging skull formation neurovascular architecture calvarial nerves lightsheet microscopy murine calvarium

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3D Image Generation from X-ray Projections Using Generative Adversarial Networks 23

3D Image Generation from X-ray Projections Using Generative ...

引用

23rd IEEE International Conference on Bioinformatics and Bioengineering, BIBE 2023

作者： AlShurbaji, Mohammad Dhou, Salam Biomedical Engineering Graduate Program American University of Sharjah Sharjah United Arab Emirates Department of Computer Science and Engineering American University of Sharjah Sharjah United Arab Emirates

ISBN: (纸本)9798350393118

The human brain can effortlessly imagine a 3D image from only 2D images with a little expertise and imagination, but for machines, this is not a trivial task. Because of this, reconstructing 3D images from 2D ones is a hot topic and has many applications. In this paper, we propose a Generative Adversarial Network (GAN)-based approach that generates CT-like images using pairs of orthogonal X-ray projections taken from different angles. In this work, a variety of orthogonal pairs from different angles, ranging from 0 &90 to 60 &150, were considered as input to the 3D image generation model. The effectiveness of the proposed method was assessed by measuring the Structural Similarity Index (SSIM) and Peak Signal-to-Noise Ratio (PSNR), which resulted in values of 0.641 and 29.21, respectively. Furthermore, the model's ability to capture the respiratory motion in the input projections and reflect it in the generated images was also assessed. This work demonstrated the feasibility of generating CT-like images from X-ray projections captured from different orthogonal angles taking into consideration the respiratory motion exhibited in these projections. © 2023 IEEE.

关键词： Generative adversarial networks

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Effect of Yttrium Treatment on Germanium-Oxide-Based Interfacial Layer of Ge P-Channel Metal–Oxide–Semiconductor Field-Effect Transistor Fabricated Through In Situ Plasma-Enhanced Atomic Layer Deposition

引用

IEEE Transactions on Electron Devices 2024年第3期71卷 1-6页

作者： Li, Hui-Hsuan Lin, Kuan-Yu Tsai, Yi-He Lin, Yu-Hsien Chien, Chao-Hsin Institute of Electronics National Yang Ming Chiao Tung University Hsinchu Taiwan Graduate Program for Nanotechnology Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Electronic Engineering National United University Miaoli Taiwan

This study investigated the effect of yttrium (Y) treatment on a germanium (Ge)-oxide-based interfacial layer (IL) through in situ plasma-enhanced atomic layer deposition (PEALD). Time-of-flight secondary-ion mass spectrometry revealed that the surface reaction and deposition could be successfully performed with a Y precursor, and X-ray photoelectron spectroscopy (XPS) revealed that Y treatment on an IL can suppress GeO

$_{\text{x}}$

volatilization. A metal–oxide–semiconductor capacitor gate-stack with a Y-GeO

$_{\text{x}}$

IL has a low leakage current density (2.1

$\times$

$^{-\text{5}}$

A/cm

$^{\text{2}}$

) and a low interface trap density (approximately 5.5

$\times$

$^{\text{11}}$

$^{-\text{1}}$

$^{-\text{2}}$

) under optimized temperatures. Moreover, the Ge P-channel metal–oxide–semiconductor field-effect transistor (P-MOSFET) containing a gate-stack with a Y-treated Ge-oxide-based IL exhibited a high I

$_{\biosc{on}}$

$_{\biosc{off}}$

ratio and low OFF-state current. Therefore, applying the proposed Y treatment on the IL of a Ge P-MOSFET can help achieve a subnanometer equivalent oxide thickness (EOT) and an

关键词： Ge-oxide-based germanium germanium oxide (GeOx) in situ interfacial layer (IL) plasma-enhanced atomic layer deposition (PEALD) Y-GeOx yttrium

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