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Laser additive manufacturing of Si/ZrO_(2)tunable crystalline phase 3d nanostructures

Opto-Electronic Advances 2022年第5期5卷 22-32页

作者： Greta Merkininkaitė Edvinas Aleksandravičius Mangirdas Malinauskas darius Gailevičius SimasŠakirzanovas Faculty of Chemistry and Geosciences Vilnius UniversityNaugarduko Str.24Vilnius LT-03225Lithuania Femtika Sauletekio Ave.15Vilnius LT-10224Lithuania Laser Research Center Physics FacultyVilnius UniversitySauletekio Ave.10Vilnius LT-10223Lithuania department of Chemical Engineering and Technology Center for Physical Sciences and TechnologySauletekio Ave.3Vilnius LT-10257Lithuania

The current study is directed to the rapidly developing field of inorganic material 3d object production at nano-/micro *** fabrication method includes laser lithography of hybrid organic-inorganic materials with subsequent heat treatment leading to a variety of crystalline phases in 3d *** this work,it was examined a series of organometallic polymer precursors with different silicon(Si)and zirconium(Zr)molar ratios,ranging from 9:1 to 5:5,prepared via sol-gel *** mixtures were examined for perspective to be used in 3d laser manufacturing by fabricating nano-and micro-feature sized *** spatial downscaling and surface morphology were evaluated depending on chemical composition and crystallographic *** appearance of a crystalline phase was proven using single-crystal X-ray diffraction analysis,which revealed a lower crystallization temperature for microstructures compared to bulk *** 3d objects retained a complex geometry without any distortion after heat treatment up to 1400℃.Under the proper conditions,a wide variety of crystalline phases as well as zircon(ZrSiO_(4)-a highly stable material)can be *** addition,the highest new record of achieved resolution below 60 nm has been *** proposed preparation protocol can be used to manufacture micro/nano-devices with high precision and resistance to high temperature and aggressive environment.

关键词： 3d nanostructures additive manufacturing crystalline phases laser lithography 3d printing high resilience inorganic materials SZ2080^(TM)

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Plasma Triggered Grain Coalescence for Self-Assembly of 3d nanostructures

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Nano-Micro Letters 2017年第3期9卷 33-42页

作者： Chunhui dai daeha Joung Jeong-Hyun Cho department of Electrical and Computer Engineering University of MinnesotaMN 55455USA

Grain coalescence has been applied in many areas of nanofabrication technology, including modification of thinfilm properties, nanowelding, and self-assembly of nanostructures. However, very few systematic studies of selfassembly using the grain coalescence, especially for threedimensional(3d) nanostructures, exist at present. Here, we investigate the mechanism of plasma triggered grain coalescence to achieve the precise control of nanoscale phase and morphology of the grain coalescence induced by exothermic energy. Exothermic energy is generated through etching a silicon substrate via application of plasma. By tuning the plasma power and the flow rates of reactive gases, different etching rates and profiles can be achieved, resulting in various morphologies of grain coalescence. Balancing the isotropic/anisotropic substrate etching profile and the etching rate makes it possible to simultaneously release 2d nanostructures from the substrate and induce enough surface tension force,generated by grain coalescence, to form 3d *** morphologies of 3d nanostructures have been obtained by the grain coalescence, and a strategy to achieve self-assembly, resulting in desired 3d nanostructures, has been proposed and demonstrated.

关键词： 3d nanostructures Grain coalescence Etching profile Self-assembly

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Self-rolled TiO2 microscroll/graphene composite for electrochemical dopamine sensing

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Progress in Natural Science:Materials International 2020年第3期30卷 337-342页

作者： Fei Ma Bin Yang Zhiwei Zhang Jilie Kong Gaoshan Huang Yongfeng Mei department of Materials Science Fudan University department of Chemistry Fudan University

dopamine is an important neurotransmitter,and nonenzyme electrochemical sensor of dopamine detection based on highly active material is urgently *** this work,an electrochemical sensor with high sensitivity and selectivity based on self-rolled TiO2microscroll/graphene composite was developed and validated for dopamine *** device exhibited a superior performance for dopamine detection with a detection limit of 4.25×10-9mol L-1,and in the dopamine concentration range of 0.06–90μmol L-1,the oxidation currents increased linearly with the *** remarkable performance enhancement was mainly ascribed to the increased surface area due to the porous surface of the TiO2nanomembrane and highly conductive graphene *** addition,we have demonstrated that the sensor could be effectively used on detecting dopamine concentrations in urine *** work demonstrates that the current microscroll-based device is promising in the field of real-time health monitoring for future human community.

关键词： Electrochemical sensor dopamine sensor Self-rolling Microscroll 3d nanostructures

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Synthesis of dandelion-like three-dimensional nickel nanostructures via solvothermal route

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Chinese Chemical Letters 2008年第9期19卷 1123-1126页

作者： Jun Tao Tian Chun Hong Gong Lai Gui Yu Zhi Shen Wu Zhi Jun Zhang Key Laboratory of Special Functional Materials of Ministry of Education Henan University Kaifeng 475004 China

The objectives of the present research are synthesizing three-dimensional （3d） nickel nanostructures and investigating their magnetic properties. Thus a template-free method was used to prepare 3d dandelion-like nickel nanostructures via reducing of nickel chloride with hydrazine hydrate in ethylene glycol solution at 100 ℃. The resulting Ni nanostructures were characterized by means of powder X-ray diffraction （XRd）, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, and selected-area electron diffraction （SAEd）. And the magnetic properties of the 3d Ni nanostructures were measured as well. Results indicated that solvothermal process could be successfully used to prepare 3d dandelion-like nanostructures of Ni at a relatively mild temperature of 100℃. And the conclusions were made as follows： as-prepared Ni samples had obvious shape anisotropy and were composed of fine nanocrystallites, while they had significantly enhanced ferromagnetic properties than bulk Ni and Ni nanoparticles.

关键词： Nickel 3d nanostructures Preparation Magnetic properties

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A shoe-box-sized 3d laser nanoprinter based on two-step absorption

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Light(Advanced Manufacturing) 2024年第2期5卷 115-122页

作者： Tobias Messer Michael Hippe Jingya(Lilyn)Gao Martin Wegener Institute of Applied Physics(APH) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany Institute of Nanotechnology(INT) Karlsruhe Institute of Technology(KIT)76128 KarlsruheGermany

State-of-the-art commercially available 3d laser micro-and nanoprinters using polymeric photoresists based on two-or multi-photon absorption rely on high-power pico-or femtosecond lasers,leading to fairly large and expensive ***,we have introduced photoresists based on two-step absorption instead of two-photon absorption,allowing for the use of small and inexpensive continuous-wave 405 nm wavelength GaN semiconductor laser diodes with light-output powers below 1 ***,using the identical photoresist system and similar laser diodes,we report on the design,construction,and characterization of a 3d laser nanoprinter that fits into a shoe *** shoe box contains all optical components,namely the mounted laser,the collimation-and beam-shaping optics,a miniature MEMS xy-scanner,a tube lens,the focusing microscope objective lens(NA=1.4,100×magnification),a piezo slip-stick z-stage,the sample holder,a camera monitoring system,LEd sample illumination,as well as the miniaturized control electronics employing a *** present a gallery of example 3d structures printed with this *** achieve about 100 nm lateral spatial resolution and focus scan speeds of about 1 mm/***,our shoe-box-sized system can be made orders of magnitude less expensive than today’s commercial systems.

关键词： Two-step absorption direct laser writing 3d laser nanoprinters Micro-electro-mechanical-systems scanner 3d nanostructures

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