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Dual-compressed photoacoustic single-pixel imaging

National science Review 2023年第1期10卷 187-195页

作者： Yuning Guo Baowen Li Xiaobo Yin Department of Mechanical Engineering University of Colorado Department of Material Science and Engineering Department of Physics Shenzhen Institute for Quantum Science and Engineering Southern University of Science and Technology Materials Science and Engineering Program University of Colorado

Photoacoustic imaging,an acoustic imaging modality with potentially optical resolution in an optical turbid medium,has attracted great ***,the convergence of wavefront optimization and raster scanning in computational photoacoustic imaging leads to the challenge of fast mapping,especially for a spatial resolution approaching the acoustic deep-subwavelength *** a sparse sampling paradigm,compressive sensing has been applied in numerous fields to accelerate data acquisition without significant quality *** this work,we propose a dual-compressed approach for photoacoustic surface tomography that enables high-efficiency imaging with 3D spatial resolution unlimited by the acoustics in a turbid *** dual-compressed photoacoustic imaging with single-pixel detection,enabled by spatially optical modulation with synchronized temporally photoacoustic coding,allows decoding of the fine optical information from the modulated acoustic signal even when the variance of original photoacoustic signals is *** perform a proof-of-principle numerical demonstration of dual-compressed photoacoustic imaging, that resolves acoustic sub-acoustic-wavelength details with a significantly reduced number of measurements,revealing the potential for dynamic *** dual-compressed concept,which transforms unobtrusive spatial difference into spatio-temporal detectable information,can be generalized to other imaging modalities to re alize efficient,high-spatial-resolution imaging.

关键词： photoacoustic imaging compressive sensing single-pixel imaging surface tomography

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Texture development and surface reconstruction of BiVO_(4)photoanode via one-pot hydrothermal reaction for enhanced photoelectrochemical water splitting

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Journal of Advanced Ceramics 2025年第3期14卷 133-141页

作者： Sung Won Hwang Yoo Jae Jeong Runfa Tan Indhujasri Saravanan Hyun Soo Han Dong Hoe Kim In Sun Cho Department of Energy Systems Research Ajou UniversitySuwon 16499Republic of Korea Department of Material Science&Engineering Ajou UniversitySuwon 16499Republic of Korea Department of Mechanical Engineering Stanford UniversityStanford 94305USA Department of Material Science&Engineering Korea UniversitySeoul 02841Republic of Korea Materials Science and Engineering Program University of Colorado BoulderBoulder 80303USA

The simultaneous optimization of the bulk and surface characteristics of photoelectrodes is essential to maximize their photoelectrochemical(PEC)*** report a novel one-pot hydrothermal synthesis of textured and surface-reconstructed BiVO_(4)photoanodes(ts-BVO),achieving significant improvements in PEC water *** controlling precursor molarity and ethylene glycol(EG)addition,we developed a stepwise dual reaction(SDR)mechanism,which enables simultaneous bulk texture development and surface *** optimized CoBi/ts-BVO photoanode exhibited a photocurrent density of 4.3 mA∙cm^(−2)at 1.23 V *** hydrogen electrode(RHE)with a high Faradaic efficiency of 98%under one sun *** with nontextured BiVO_(4),the charge transport efficiency increased from 8%to 70%,whereas the surface charge transfer efficiency improved from 9%to 85%.These results underscore the critical role of both bulk and surface engineering in enhancing PEC *** findings offer a streamlined approach for improving the intrinsic properties of photoanodes in solar water splitting.

关键词： BiVO_(4) hydrothermal texture surface reconstruction ethylene glycol(EG) photoelectrochemical water splitting

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Interfacial reactions in the Sn-9.0 wt.% Zn/Cu-Ti alloy (C1990 HP) couple

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Soldering and Surface Mount Technology 2024年第1期36卷 30-38页

作者： Laksono, Andromeda Dwi Chen, Chih-Ming Yen, Yee-Wen Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan Department of Chemical Engineering National Chung Hsing University Taichung Taiwan Study Program of Material and Metallurgical Engineering Institut Teknologi Kalimantan Balikpapan Indonesia

Purpose: The purpose of this study was to examine the influence of adding a small amount of Ti to a Cu-based alloy, specifically the commercial Hyper Titanium Copper alloy (C1990 HP), which contains Cu-3.28 wt.% Ti, on its interfacial reaction with Sn-9.0 wt.% Zn (SnZn) solder, using the liquid/solid reaction couple technique. Design/methodology/approach: The SnZn/C1990 HP couples were subjected to a reaction temperature of 240–270°C for a duration of 0.5–5 h. The resulting reaction couple was characterized using a scanning electron microscope, energy dispersive spectrometer, electron probe microanalyzer and X-ray diffractometer. Findings: It was observed that the scallop-shaped CuZn5 and planar Cu5Zn8 phases were formed in almost all SnZn/C1990 HP couples. With increased reaction duration and temperature, the Cu-rich intermetallic compound (IMC)-Cu5Zn8 phase became a dominant IMC formed at the interface. The total thickness of the IMCs was increased with the increase in the reaction duration and temperature. The IMC growth obeyed the parabolic law, and the IMC growth mechanism was diffusion controlled. The activation energy of the SnZn/C1990 HP couple was 64.71 kJ/mol. Originality/value: This article presents an analysis of the IMC thickness in each sample using ImageJ software, followed by kinetic analysis using Origin software at various reaction temperatures of SnZn/C1990 HP in liquid/solid couples. The study also includes detailed reports on the morphology, interface composition and X-ray diffraction analysis, as well as the activation energy. The findings can serve as a valuable reference for electronic packaging companies that utilize C1990 HP substrates. © 2023, Emerald Publishing Limited.

关键词： Binary alloys

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Passerini and thiol-ene reactions: A facile, green, and efficient route to high-performance bio-based plasticizers

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Progress in Natural science:materials International 2024年第6期34卷 1249-1257页

作者： Menghua Feng Xuyi Wang Wenjia Jiang Jianming Zhao Yutong Xie Haojun Fan Qiang Yan Jun Xiang College of Biomass Science and Engineering Sichuan University China Blue-Star Chengrand Co. Ltd. High-Tech Organic Fibers Key Laboratory of Sichuan Province Guangzhou Wenjia New Material Technology Co. Ltd. State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University

The increasing global demand for sustainable alternatives to petroleum-based plasticizers, particularly in poly(-vinyl chloride)(PVC) products, has intensified the exploration of bio-based options derived from renewable resources such as plant oils. Traditional bio-based plasticizers, while promising, often suffer from limitations such as low molecular weight, high volatility, and poor compatibility with PVC, thereby restricting their practical applications. To surmount this hurdle, we introduce a novel synthetic route combining the Passerini reaction with the thiol-ene click reaction, aimed at producing high-performance plant oil-based plasticizers(POPs) with enhanced ester content and molecular weight. This method offers significant advantages over traditional methods,including low reaction temperatures(≤40°C), ultrahigh yield(95 %) when using ethanol as the solvent, and precise control over ester content. Furthermore, the key findings demonstrate that the designed and synthesized POP(bio-content, 69 %) produced using this method exhibits outstanding overall performance, such as excellent migration resistance, good compatibility with PVC, and high thermal stability compared to traditional *** facile, green, and efficient method may significantly advance the adoption of bio-based plasticizers, establishing them as a viable alternative to petroleum-based counterparts.

关键词： Bio-based plasticizers Passerini reaction Thiol-ene click reaction Plant oil Sustainability

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Polyamide Composite Membranes on Electrospun Nanofibers for Osmotic Enrichment of Ionic Liquids from Aqueous Solutions

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Chinese Journal of Polymer science 2025年第5期43卷 819-827页

作者： Yu-Jie Shang Bian-Bian Guo Hao-Nan Li Yong-Jin Li Jing Yang Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education and Key Laboratory of Organosilicon Material Technology of Zhejiang ProvinceCollege of MaterialChemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou311121China MOE Key Laboratory of Macromolecular Synthesis and Functionalization and Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou310027China

The recovery of ionic liquids(ILs)has attracted growing attention as an indispensable process in“green”industrial *** osmosis(FO)has proven to be a sustainable method for concentrating the very dilute aqueous solutions of ILs at ambient temperature,in which semi-permeable membranes play a vital role in determining the recovery ***,we use interfacial polymerization method to prepare thin-film composite membranes consisting of polyamide skin layer and electrospun nanofibrous substrate with tunable water permeability and IL selectivity for osmotic enrichment of imidazolium ILs from their dilute aqueous solutions through FO *** resulting FO membrane shows a compact polyamide layer with a thickness of 30-200 nm,guranteeing a high selectivity to ILs and ***,the nanofibrous substrate with large and interconnect pores as well as low tortuosity,providing mechanical and permeable support for the composite *** structure influences the osmotic pressure difference as well as the interactions with polyamide layer of the membrane and thus determines the whole concentration ***,the alkyl chain growth augments the osmosis pressure difference between the ILs solution and draw solution,resulting in an enhancement in driving force of water osmosis and IL ***,alkyl length aggravates external concentration polarization caused by the enhanced adsorption of ILs onto the skin layer via electrostatic and alkyl-π***,such adsorbed ILs further enhance the IL retention but decrease the reverse salt ***,imidazolium ILs with varied alkyl lengths are ultimately enriched with a 100-fold increase in concentration from their dilute aqueous solutions with high IL/NaCl rejection and low IL ***,the final concentration of IL with longest alkyl length reaches the highest(6.4 mol·L^(-1)).This work provides the insights in respect to material preparation and process amelioratio

关键词： Thin-film composite membrane Forward osmosis Ionic liquids Interfacial polymerization Electrospun nanofiber

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Silk-derived peptide nanospirals assembled by self-propelled wormlike filaments

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Nano Research 2023年第1期16卷 1414-1420页

作者： Huijuan Wen Jinrong Yao Xin Chen Shengjie Ling Zhengzhong Shao State Key Laboratory of Molecular Engineering of Polymers Advanced Material LaboratoryDepartment of Macromolecular ScienceFudan UniversityShanghai 200433China School of Physical Science and Technology ShanghaiTech University393 Middle Huaxia RoadShanghai 201210China

Swirl-like nanospiral is a common structure found in free-swimming biological systems,such as microtubules and actin filaments or slender *** is desired for artificially designed dynamic ***,the spiral formation has rarely been reported in both engineered peptides and regenerated ***,we report that such a unique assembly behavior can be achieved by using a fusion peptide consisting of a silk-derived peptide(i.e.,GAGAGAGY)and a hydrophobic,photoresponsive azobenzene(Azo)*** this fusion structure,GAGAGAGY acts as a domain that spontaneously forms an elongated filament in an aqueous solution,while Azo acts as a"light-operated switch"that can undergo photoinduced isomerization to modulate the self-propulsion forces and assembly *** this design,the critical factors that affect the assembly of Azo-GAGAGAGY filament,including(i)length and flexibility of filaments;(ii)propulsion,and(iii)excluded volume interactions force the tip of the filament to wind up,can be regulated to realize the spiral *** addition,the configurations of Azo-GAGAGAGY filaments,such as straight nanoribbons,wavy nanoribbons,single-circle spiral,and multiple-circle spiral,can be facilely mediated by changing the preparation procedure,concentration,and pH value of Azo-GAGAGAGY solution,as these changes have significant influences on self-propulsion *** findings can help in the better understanding of nonequilibrium thermodynamics and collective behavior of biological *** findings can be used as a guideline for the designs of nanoactuators,microswimmers,transformable microrobots,and intelligent drug carriers.

关键词： nanospiral silk-derived peptide self-assembly worm-like filaments photoinduced isomerization

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Smartly tuning supramolecular chirality in polymer gels via photoexcitation-induced cooperative self-assembly

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science China Chemistry 2025年第3期68卷 1126-1135页

作者： Bingbing Yue Yulong Shi Fan Yang Danfeng Ye Jian Jin Pilan Zhang Shen Song Yifei Xu Hui Lin Shihui Zhu Liangliang Zhu School of Materials and Chemistry University of Shanghai for Science and TechnologyShanghai 200093China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200438China College of Material Science and Chemical Engineering Ningbo University of TechnologyNingbo 315211China Shanghai Depeac Biotechnology Co. Ltd.Shanghai 201900China Burn and Plastic Surgery Department Children’s Medical Center Affiliated to Shanghai Jiao Tong University School of MedicineShanghai 200120China

Although supramolecular chirality tuning is prosperous in systems with small molecular building blocks,these systems lack structural strength and have limited practical ***,polymer systems do not exhibit these drawbacks but suffer from topological chain entanglement,which often leads to large dynamic obstacles and therefore limits the tunability of supramolecular ***,we report that by manipulating stoichiometry and employing light to alter the H-bond crosslinking between a photoexcitation-induced aggregatable molecule and high molecular weight poly(L-lactic acids),supramolecular chirality tuning of the polymer gel systems can be achieved in different ways through a cooperative ***,the Cotton effects of the examined systems can be negatively tuned by varying their stoichiometry,while positive tuning can be realized by *** deexcitation,negative Cotton effect tuning occurs again spontaneously in some *** supramolecular chirality tuning is accompanied by rheological property tuning,demonstrating that our strategy can overcome polymer chain entanglement *** proposed strategy inspires further works on the precise control of polymer chirality and,hence,development of asymmetric materials with changeable optical activity and modulus.

关键词： supramolecular chirality polymer gels phototuning self-assembly rheological property

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Design and Optimization of the Porous Metamaterial EM Absorbers in X-band

Design and Optimization of the Porous Metamaterial EM Absorb...

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2023 IEEE Symposium on Electromagnetic Compatibility and Signal/Power Integrity, EMC+SIPI 2023

作者： Anurakparadorn, Kanat Taub, Alan Michielssen, Eric University of Michigan Macromolecular Science and Engineering Program Department of Material Science and Engineering Ann ArborMI United States University of Michigan Department of Mechanical Engineering Ann ArborMI United States University of Michigan Department of Electrical Engineering and Computer Science Ann ArborMI United States

ISBN: (纸本)9798350309768

A strategy that combines experiment and simulation to design and optimize electromagnetic (EM) metamaterial absorbers containing a periodic porous structure is described. The approach provides the ability to produce absorbers that meet multiple user-specified objectives. Using the measured intrinsic properties of the baseline materials as an input to EM-field based computational modelling and optimization, absorption by the studied metamaterials measured by their reflection loss (RL) increases significantly. The resulting metamaterials have the potential for lower cost and lighter weight while providing greater protection than traditional metal gaskets and foams. © 2023 IEEE.

关键词： Metamaterials

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Sulfonation of HwBKP by Sulfur Trioxide Pyridine Complex and Preparation of Anionic Cellulose Beads Using the Same

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Palpu Chongi Gisul/Journal of Korea Technical Association of the Pulp and Paper Industry 2023年第2期55卷 10-18页

作者： Kim, Younglae Heo, Dohyeon Cho, Byoung-Uk Department of Paper Science & Engineering College of Forest & Environmental Sciences Kangwon National University Korea Republic of Program of Paper Material Science & Engineering College of Forest & Environmental Sciences Kangwon National University Korea Republic of

To expand the applications of cellulose beads, sulfonated cellulose beads were prepared by chemically modifying HwBKP fibers with sulfur trioxide pyridine complex (STP), dissolving in tetraethylammonium hydroxide (TEAOH)/urea solvent, and dropping into acetic acid solution. The effect of the amount of STP added on the properties of sulfonated cellulose solution and cellulose beads was investigated. It was observed that the sulfonated cellulose beads exhibited anionic surface charge in a fairly wide pH range, and the degree of substitution of sulfonic acid groups and the zeta potential of the cellulose beads could be controlled by adjusting the amount of added STP. In addition, as the amount of STP added increased, the crystallinity of the cellulose decreased, the viscosity and surface tension of the sulfonated cellulose/TEAOH/urea solution decreased, and the size of the cellulose beads increased. © 2023 Korean Technical Assoc. of the Pulp and Paper Industry. All rights reserved.

关键词： Zeta potential

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Evaluating mechanism of banana pseudo-stem retting using seawater:A cost-effective surface pre-treatment approach

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Journal of Bioresources and Bioproducts 2024年第3期9卷 322-335页

作者： Prince Hotor Ahmed H.Hassanin Osbert Akatwijuka Mohamed A.H.Gepreel Mitsuo Yamamoto Yukie Saito Ahmed Abdel-Mawgood Egypt-Japan University of Science and Technology Biotechnology ProgramAlexandria GovernorateNew Borg Al Arab 21934Egypt Alexandria University Department of Textile EngineeringAlexandria GovernorateBab Sharqi 5424041Egypt Egypt-Japan University of Science and Technology Material Science and EngineeringAlexandria GovernorateNew Borg Al Arab 21934Egypt Graduate School of Agricultural and Life Sciences The University of TokyoBunkyo-KuTokyo 113-8657Japan

Retting has been employed to extract natural fibers from agricultural wastes as a biological and cost-effective approach for *** its global abundance,banana pseudo-stem is a promising agro-waste for lignocellulosic fiber *** this study,fibers were extracted from the pseudo-stems after being pre-treated under four conditions using seawater at room temperature for up to 35 d Bacterial isolation from the fresh seawater sample and screening for ligninolytic ability were *** load as well as laccase and manganese peroxidase enzyme activity profile assay during the retting duration were *** transform infrared(FT-IR)and X-day diffraction(XRD)analyses were also examined for both pre-treated and untreated extracted *** results shows that six out of the eight bacterial isolates had the ability to degrade *** treatments(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)recorded the highest viable bacterial load of 9.24×102 and 4.46×102 CFU,respectively,on the 14th day of the retting ***,the highest laccase and manganese peroxidase enzymes activity was recorded for(Raw stem+Raw seawater)and(Autoclaved stem+Raw seawater)treatments in the second to the third *** FT-IR spectra of the pre-treated fibers revealed relative reductions in peaks attributed to polysaccharides and other amorphous substances for all retting *** XRD diffractogram revealed that the crystallinity index(CI)of pre-treated fibers increased in all seawater retting treatment ***,the CI for fibers pre-treated under enzymatic conditions were enhanced even after five *** analysis for selected bacterial isolates showed homology to sequences of Bacillus velezensis,Shewanella sp.L8–5,and Citrobacter amalonaticus and Bacillus subtilis j8 *** these findings,it was suggested that physical,biological,and chemical actions were collectively involved in the seawater retting process of banana ps

关键词： Seawater retting Banana pseudo-stem Natural fiber Enzyme activity Colony forming unit

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