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Aggregate 2022年第4期3卷 85-100页

作者： Pavana Siddhartha Kollipara Ritvik Mahendra Jingang Li Yuebing Zheng Walker Department of Mechanical Engineering The University of Texas at AustinAustinTexasUSA Department of Electrical and Computer Engineering The University of Texas at AustinAustinTexasUSA Material Science and Engineering Program Texas Materials InstituteThe University of Texas at AustinAustinTexasUSA

Developing on-chip functional devices requires reliable fabrication methods with high resolution for miniaturization,desired components for enhanced performance,and high throughput for fast prototyping and mass ***,laser-based bubble-pen lithography(BPL)has been developed to enable sub-micron linewidths,in situ synthesis of custom materials,and on-demand patterning for various functional components and *** exploits Marangoni convection induced by a laser-controlled microbubble to attract,accumulate,and immobilize particles,ions,and molecules onto different *** years have witnessed tremendous progress in theory,engineering,and application of BPL,which motivated us to write this ***,an overview of experimental demonstrations and theoretical understandings of BPL is ***,we discuss the advantages of BPL and its diverse applications in quantum dot displays,biological and chemical sensing,clinical diagnosis,nanoalloy synthesis,and *** conclude this review with our perspective on the challenges and future directions of BPL.

关键词： additive manufacturing capillary flow lithography marangoni convection microbubbles sensing

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Van der Waals device integration beyond the limits of van der Waals forces using adhesive matrix transfer

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Nature Electronics 2024年第1期7卷 17-28页

作者： Satterthwaite, Peter F. Zhu, Weikun Jastrzebska-Perfect, Patricia Tang, Melbourne Spector, Sarah O. Gao, Hongze Kitadai, Hikari Lu, Ang-Yu Tan, Qishuo Tang, Shin-Yi Chueh, Yu-Lun Kuo, Chia-Nung Lue, Chin Shan Kong, Jing Ling, Xi Niroui, Farnaz Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology CambridgeMA United States Research Laboratory of Electronics Massachusetts Institute of Technology CambridgeMA United States Department of Chemical Engineering Massachusetts Institute of Technology CambridgeMA United States Department of Physics Massachusetts Institute of Technology CambridgeMA United States Department of Chemistry Boston University BostonMA United States Department of Materials Science and Engineering National Tsing Hua University Hsinchu Taiwan Semiconductor Research Center Hon Hai Research Institute Taipei Taiwan College of Semiconductor Research National Tsing Hua University Hsinchu Taiwan Department of Physics National Cheng Kung University Tainan Taiwan Taiwan Consortium of Emergent Crystalline Materials National Science and Technology Council Taipei Taiwan Program on Key Materials Academy of Innovative Semiconductor and Sustainable Manufacturing National Cheng Kung University Tainan Taiwan Division of Materials Science and Engineering Boston University BostonMA United States The Photonics Center Boston University BostonMA United States

Pristine van der Waals (vdW) heterostructures formed between two-dimensional (2D) and other materials can be used to create optical and electronic devices. However, the weak vdW forces alone do not allow direct physical stacking of arbitrary layers. As a result, vdW heterostructure fabrication typically requires solvents, sacrificial layers or high temperatures, which can introduce damage and contaminants. Here, we show that adhesive matrix transfer can eliminate these limitations and can provide vdW integration beyond the limits of vdW forces. In the approach, a hybrid high- and low-adhesion surface is used to decouple the forces driving the transfer from the vdW forces defining the heterostructure of interest. We show that the technique can be used to achieve direct vdW integration of diverse 2D materials (MoS2, WSe2, PtS2 and GaS) with dielectrics (SiO2 and Al2O3), which is conventionally forbidden but critical for active devices and scalable, aligned heterostructure formation. The approach also allows single-step 2D material-to-device integration, which we illustrate by fabricating arrays of monolayer MoS2 transistors. As any exposure to solvents or polymers is avoided, the interfaces and surfaces remain pristine. Thus, intrinsic 2D material properties can be probed without the influence of processing steps. The materials can be further engineered through surface treatments and used to fabricate unconventional device form factors. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Van der Waals forces

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High-quality Mid-infrared Chalcogenide Ring Resonator

High-quality Mid-infrared Chalcogenide Ring Resonator

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2024 Conference on Lasers and Electro-Optics, CLEO 2024

作者： Lu, Bright Xu, Bo Krueper, Greg Zohrabi, Mo Gopinath, Juliet T. Park, Wounjhang Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO80309 United States Department of Physics University of Colorado BoulderCO80309 United States Materials Science and Engineering Program University of Colorado BoulderCO80309 United States

ISBN: (纸本)9781957171395

We report Ge23Sb7S70 chalcogenide ring resonators with up to 8 × 104 quality factors operating around 3.6 µm wavelength fabricated through e-beam lithography. Their rib waveguide geometry can be engineered to support close-to-zero dispersion modes needed for mid-infrared microcomb generation. CLEO 2024 © Optica Publishing Group 2024 © 2024 The Author(s)

关键词： Ring lasers

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Advances in powder nano-photocatalysts as pollutant removal and as emerging contaminants in water:Analysis of pros and cons on health and environment

Advanced Powder Materials

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Advanced Powder materials 2024年第6期3卷 33-69页

作者： Sahil Thakur Abhijeet Ojha Sushil Kumar Kansal Navneet Kumar Gupta Hendrik C.Swart Junghyun Cho Andrej Kuznetsov Shuhui Sun Jai Prakash Department of Chemistry National Institute of Technology HamirpurHamirpur(H.P.)177005India Department of Materials Science and Engineering National Institute of Technology HamirpurHamirpur(H.P.)177005India Dr.S.S.Bhatnagar University Institute of Chemical Engineering and Technology Panjab UniversityChandigarh 160014India Center for Sustainable Technologies Indian Institute of Science(IISc)Gulmohar MargMathikereBengaluru 560012India Department of Physics University of the Free State(UFS)BloemfonteinZA 9300South Africa Department of Mechanical Engineering&Materials Science and Engineering Program State University of New York(SUNY)BinghamtonNY 13902-6000USA University of Oslo Department of Physics and Centre for Materials Science and NanotechnologyPO Box 1048 BlindernN-0316OsloNorway Institut National de la Recherche Scientifique(INRS)-CentreEnergie Materiaux et Telecommunications VarennesQuebec J3X 1P7Canada

Photocatalysis is an advanced oxidation process where light exposure triggers a semiconducting nanomaterial(nano-photocatalyst)to generate electron-hole(e^(-)/h^(+))pairs and free *** phenomenon is widely used for the photocatalysis-assisted removal of organic and other contaminants using wide range of nanophotocatalysts,offering an efficient approach to environmental ***,the introduction of powdered nano-photocatalysts into water systems often leads to unintended secondary pollution in the form of residual nano-photocatalysts,ion leaching,free radicals,toxic by-products *** practices potentially introduce emerging secondary contaminants into aquatic environments,posing risks to both aquatic life and human *** resulting chemical by-products and intermediates can effectively induce chronic toxicity,neurological and developmental disorders,cardiovascular defects,and intestinal ailments in humans and aquatic *** having a range of health and environmental consequences,this dark side of nano-photocatalysts has been comparatively less explored and discussed in the *** this review,the pros and cons of powder nanophotocatalysts are discussed in view of their advantages as well as disadvantages in wastewater *** discussion encompasses their classification based on composition,dimensions,structure,and activity,as well as recent advancements in improving their photocatalytic *** article also explores the recent advances on their applications in photocatalytic removal of various water pollutants/contaminants of emerging concern(i.e.,organic pollutants,micro/nano plastics,heavy ions,disinfections,etc.)Furthermore,an emphasis on the role of such nano-photocatalysts as emerging(secondary)contaminants in water system,along with a thorough discussion of latest studies related to the health and environmental issues,has been ***,it addresses critical issues in applying powder nano-photo

关键词： Powder nano-photocatalysts Advanced oxidation processes Wastewater treatment Pros and cons Emerging contaminants Health and environment issues

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Halogen-based functionalized chemistry engineering for high-performance supercapacitors

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Chinese Chemical Letters 2023年第1期34卷 114-126页

作者： Wuquan Ye Hongfei Wang Junling Shen Shahid Khan Yijun Zhong Jiqiang Ning Yong Hu Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of ChemistryZhejiang Normal UniversityJinhua 321004China Department of Optical Science and Engineering Fudan UniversityShanghai 200438China Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China

Supercapacitors(SCs)are rated as the foremost efficient devices bridging the production and consumption of renewable *** address the ever-increasing energy requirements,it is indispensable to further develop high-performance SCs with merits of high energy-density,acceptable price and long-term *** review highlights the recent advances on halogen-based functionalized chemistry engineering in the state-of-the-art electrode system for high-performance SCs,primarily referring to the doping and decoration strategies of F,Cl,Br and I *** to the discrepancy of electronegativity and atomic radius,the functionalization of each halogen element endows the substrate materials with different physicochemical properties,including energy bandgap structure,porosity distribution and surface *** principle of halogen embedment into host materials by precisely controlling ionic adsorption and electronic structure is ***,the vital perspectives on the future challenges of halogen functionalization are also *** work aims to deepen the understanding of halogen-based functionalized strategies to motivate further research for the development of high-performance SCs,and it also provides a prospect for exploring new material modification methods for electrochemical energy storage.

关键词： Halogen-based functionalized chemistry Doping strategy Decoration strategy Electrode materials Supercapacitors

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High-quality Mid-infrared Chalcogenide Ring Resonator

High-quality Mid-infrared Chalcogenide Ring Resonator

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CLEO: science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and Electro-Optics

关键词： Infrared devices

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Development of 2D zinc-aluminum hexagonal LDHs for greater catalytic degradation of food colorant Allura red dye: Catalytic property and DFT studies

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Ceramics International 2024年第16期51卷 22691-22697页

作者： Prasanna, Sanjay Ballur Ravikumar, Srujan Basavapura Mallu, Trishul Alanahalli Shadakshari, Sandeep Krishnegowda, Hema Mylnahalli Rajabathar, Jothi Ramalingam Lin, Yu-Chien Arul Thomas, Mosas Vinsy Shivamurthy, Santhosh Arehalli Chung, Ren-Jei Taipei10608 Taiwan Department of Chemistry SJCE JSS Science and Technology University Karnataka Mysuru570006 India Department of Environmental Engineering Sri Jayachamarajendra College of Engineering JSS Science and Technology University Mysuru570006 India N.M.K.R.V. College for Women Karnataka 560011 India Department of Studies in Physics University of Mysore Manasagangotri Karnataka Mysuru570006 India Surfactants Research Chair Department of Chemistry College of Science King Saud University P.O. Box. 2455 Riyadh11451 Saudi Arabia School of Materials Science and Engineering Nanyang Technological University Singapore 639798 Singapore ZhongSun Co. LTD New Taipei City220031 Taiwan Taipei10608 Taiwan

Allura Red (AR) is a synthetic food colorant that is found in the wastewater of several food companies. It is utilized in drinks, syrups, and instant drink powders. In this study, 2D Zinc-Aluminum hexagonal layered double hydroxides (LDHs) were successfully synthesized and demonstrated to be an effective catalyst for AR degradation. In the presence of sodium borohydride (NaBH4), these synthesized LDHs demonstrated greater catalytic activity for AR degradation. According to the pseudo-first-order kinetic investigation, 2D Zinc-Aluminum hexagonal LDHs have excellent catalytic degradation activity toward AR. AR degradation rates can reach 77.03 % in 60 min, suggesting the fast catalytic efficacy of the resultant Zinc-Aluminum hexagonal LDHs in the presence of NaBH4. The experimental and DFT calculation findings revealed that an electric field existed between the surfaces, resulting in rapid electron movement. The outstanding catalytic activity indicates that Zinc-Aluminum hexagonal LDHs may have a good prospective use in organic dye wastewater treatment. © 2024 Elsevier Ltd and Techna Group S.r.l.

关键词： Wastewater treatment

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Atomistic observation of in situ fractured surfaces at a V-doped WC–Co interface

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Journal of materials science & Technology 2022年第15期110卷 103-108页

作者： Congying Xiang Min Shen Chongze Hu Lok Wing Wong Hongbo Nie Huasheng Lei Jian Luo Jiong Zhao Zhiyang Yu State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Department of NanoEngineering Program of Materials Science and EngineeringUniversity of California San DiegoLa JollaCA 92093United States Department of Applied Physics Hong Kong Polytechnic UniversityHong Kong 999077China School of Materials Science and Engineering Baise UniversityBaise 533000China

*** Cemented carbides are composites of WC ceramic phases and metallic Co binders that endow them with superior hardness and excellent *** metals are widely used as metal cutting and rock drilling tools[1,2].Their hardness is believed to be inversely proportional to the sizes of WC grains^([3]).Grain growth inhibitors are widely employed to achieve smaller grain sizes.

关键词： toughness grain sizes

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Homochiral carbon nanotube van der Waals crystals

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science (New York, N.Y.) 2025年第6740期387卷 1310-1316页

作者： Zhang, Zhichun Chen, Yi Shen, Peiyue Chen, Jiajun Wang, Sen Wang, Bo Ma, Saiqun Lyu, Bosai Zhou, Xianliang Lou, Shuo Wu, Zhenghan Xie, Yufeng Zhang, Chengjia Wang, Liguo Xu, Kunqi Li, Haonan Wang, Guohua Watanabe, Kenji Taniguchi, Takashi Qian, Dong Jia, Jinfeng Liang, Qi Wang, Xiaoqun Yang, Wei Zhang, Guangyu Jin, Chuanhong Ouyang, Wengen Shi, Zhiwen Key Laboratory of Artificial Structures and Quantum Control (Ministry of Education) Shanghai Jiao Tong University School of Physics and Astronomy and Tsung-Dao Lee Institute Shanghai China Department of Engineering Mechanics School of Civil Engineering Wuhan University Wuhan Hubei China State Key Laboratory of Water Resources Engineering and Management Wuhan University Wuhan Hubei China State Key Laboratory of Silicon and Advanced Semiconductor Materials School of Materials Science and Engineering Zhejiang University Hangzhou Zhejiang China Research Center for Electronic and Optical Materials National Institute for Materials Science Tsukuba Japan Research Center for Materials Nanoarchitectonics National Institute for Materials Science Tsukuba Japan Collaborative Innovation Centre of Advanced Microstructures Nanjing University Nanjing China School of Physics and Institute for Advanced Studies of Physics Zhejiang University Hangzhou Zhejiang China Beijing National Laboratory for Condensed Matter Physics Key Laboratory for Nanoscale Physics and Devices Institute of Physics Chinese Academy of Sciences Beijing China Songshan Lake Materials Laboratory Dongguan China State Key Laboratory of Micro-Nano Engineering Science Shanghai Jiao Tong University Shanghai China

For applications of single-walled carbon nanotubes (SWNTs) in integrated circuits, it is crucial to have high-tube density arrays of SWNTs that are well aligned and purely semiconducting. In this work, we report on the direct growth of close-packed SWNT arrays on hexagonal boron nitride (hBN) substrates, demonstrating high alignment and uniform chirality within each array. Molecular dynamics simulations suggest that a self-assembly growth mechanism resulted from the intertube van der Waals attraction and the ultralow sliding friction of SWNTs on the atomically flat hBN substrate. Field-effect transistors constructed from the grown SWNT array exhibit high performance at room temperature, with mobilities of up to 2000 square centimeters per volt per second, on/off ratios of ~107, and a maximum current density of ~6 milliamperes per micrometer.

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Formability Analysis of Metal–Polymer Sandwich Composites Made of Al and PE Sheets Using Numerical Simulations 1

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12th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, NUMISHEET 2022

作者： Bekele, Tsegaye Janaki Ramulu, Perumalla Beri, Habtamu Siraji, Amrela Praveen Kumar Reddy, P. Program of Mechanical Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia Centre of Excellence for Advanced Manufacturing Engineering School of Mechanical Chemical and Materials Engineering Adama Science and Technology University Adama Ethiopia School of Technology Gitam Deemed to Be University and Mahaveer Institute of Science and Technology Hyderabad India

ISBN: (数字)9783031062124

ISBN: (纸本)9783031062117

Metal/polymer/metal (MPM) sandwiched composites are in the class of capable engineering materials which give outstanding strength-to-weight ratios because of their comparatively low density. These materials are vital constituents within the automobile, aerospace, marine, and civil construction industries as substitutes for sheet metals that considerably reduce weight while not compromising practicality such as load bearing capacity stiffness and flexibility. For these materials to be utilised within the aforesaid industries, they need to bear numerous forming processes. This paper investigates the formability of metal-polymer sandwich composites made of AA-PE-AA (APA) and Galvanised Steel-PE-Galvanised Steel (GPG) considering the adhesion strength via numerical simulation. For evaluating the formability, the actual limit dome height (LDH)—bi-axial strain path—test setup is simulated using FEM. The results analysed are forming limit diagram (FLD), punch force distribution, and dome height at diverse conditions of punch velocity and friction. All the numerical simulations were performed using Altair Hyperworks with various blank sizes. The results are noted as FLD and dome height at varied conditions. A comparison is made to represent the best combinations for formability of the sandwich composites. Maximum formability and dome height are attained at low friction conditions and forming speed. © 2022, The Minerals, Metals & materials Society.

关键词： Adhesion

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