Thematische Bibliographien / Ultra-Flat surfaces

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Auswahl der wissenschaftlichen Literatur zum Thema „Ultra-Flat surfaces“

Autor: Grafiati

Veröffentlicht am 25. Mai 2024

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Zeitschriftenartikel zum Thema "Ultra-Flat surfaces"

Borole, P. O., und R. S. Thakur. „Ultra-Precision Optical Flat Surfaces“. Journal of Optics 20, Nr. 2 (Juni 1991): 82–87. http://dx.doi.org/10.1007/bf03549694.

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Kato, Teiji, und Takayuki Nakakawaji. „Microstructures in Lubricant Thin Layers at the Magnetic Disk Surface, Observed Using Cryogenic Atomic Force Microscopy“. Australian Journal of Chemistry 59, Nr. 6 (2006): 394. http://dx.doi.org/10.1071/ch06094.

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Cryogenic Atomic Force Microscopy (AFM) was used to observe perfluoropolyether (PFPE) lubricant molecules at atomically flat solid surfaces and at a magnetic disk surface to understand the lubricity of ultra-thin (1 nm) lubricant layers at the hard disk surface. Molecular imaging of PFPE lubricant molecules reveals the formation of reversed micelle structures at comparatively non-polar solid surfaces such as gold or the carbon overcoat of magnetic disks.

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Cho, Sung-Pyo, Yoshiaki Nakamura, Jun Yamasaki, Eiji Okunishi, Masakazu Ichikawa und Nobuo Tanaka. „Microstructure and interdiffusion behaviour of β-FeSi2 flat islands grown on Si(111) surfaces“. Journal of Applied Crystallography 46, Nr. 4 (04.07.2013): 1076–80. http://dx.doi.org/10.1107/s0021889813015355.

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β-FeSi2 flat islands have been fabricated on ultra-thin oxidized Si(111) surfaces by Fe deposition on Si nanodots. The microstructure and interdiffusion behaviour of the β-FeSi2/Si(111) system at the atomic level were studied by using spherical aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and energy dispersive X-ray spectroscopy. The formed β-FeSi2 flat islands had a disc shape with an average size of 30–150 nm width and 10–20 nm height, and were epitaxically grown on high-quality single-phase Si with a crystallographic relationship (110)β-FeSi2/(111)Si and [001]β-FeSi2/[1\bar 10]Si. Moreover, the heterojunction between the β-FeSi2(110) flat islands and the Si(111) substrate was an atomically and chemically abrupt interface without any irregularities. It is believed that these results are caused by the use of ultra-thin SiO2 films in our fabrication method, which is likely to be beneficial particularly for fabricating practical nanoscaled devices.

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Blackstock, Jason J., Zhiyong Li, Mark R. Freeman und Duncan R. Stewart. „Ultra-flat platinum surfaces from template-stripping of sputter deposited films“. Surface Science 546, Nr. 2-3 (Dezember 2003): 87–96. http://dx.doi.org/10.1016/j.susc.2003.09.039.

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Hirayama, Hiroyuki. „Growth of atomically flat ultra-thin Ag films on Si surfaces“. Surface Science 603, Nr. 10-12 (Juni 2009): 1492–97. http://dx.doi.org/10.1016/j.susc.2008.09.057.

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Zhang, Kai, Alexandra Arranja, Hongyu Chen, Serhii Mytnyk, Yiming Wang, Sander Oldenhof, Jan H. van Esch und Eduardo Mendes. „A nano-fibrous platform of copolymer patterned surfaces for controlled cell alignment“. RSC Advances 8, Nr. 39 (2018): 21777–85. http://dx.doi.org/10.1039/c8ra03527j.

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A method to transfer-print quenched, ultra-long copolymer cylindrical micelles to a flat surface and the use of these nano-structures to promote spontaneous cell alignment is proposed. Endless possibilities of corona end-group chemical modification provide a new tool to control cell response.

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Jiang, Li, Tao Wang und Christian A. Nijhuis. „Fabrication of ultra-flat silver surfaces with sub-micro-meter scale grains“. Thin Solid Films 593 (Oktober 2015): 26–39. http://dx.doi.org/10.1016/j.tsf.2015.09.023.

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Masens, Carl, Jurgen Schulte, Matthew Phillips und Svetlana Dligatch. „Ultra Flat Gold Surfaces for Use in Chemical Force Microscopy: Scanning Probe Microscopy Studies of the Effect of Preparation Regime on Surface Morphology“. Microscopy and Microanalysis 6, Nr. 2 (März 2000): 113–20. http://dx.doi.org/10.1007/s100059910010.

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The preparation of ultra flat gold surfaces for use in chemical force microscopy (CFM) has been studied. The surfaces were studied in terms of substrate effects by comparing mica, Si (110) wafer and glass slides. The effect of different annealing regimes was also investigated. Measurements on these surfaces were made by both atomic force microscopy (AFM) (in contact and tapping mode) and by scanning tunneling microscopy (STM). The films contain different morphologies with respect to grain size and topography. Calculations of surface roughness present values less than 2.5 nm for all surfaces studied, making the choice of the flattest surface difficult if based on criteria of surface roughness alone. Additionally, it is shown that different acquisition parameters can produce dissimilar images that have stability and reproducibility.

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Sander, Tim, Yi Liu, Tuan Anh Pham, Maximilian Ammon, Mirunalini Devarajulu und Sabine Maier. „Ultra-high vacuum cleaver for the preparation of ionic crystal surfaces“. Review of Scientific Instruments 93, Nr. 5 (01.05.2022): 053703. http://dx.doi.org/10.1063/5.0088802.

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Cleaving single crystals in situ under ultra-high vacuum conditions provides a reliable and straightforward approach to prepare clean and atomically well-defined surfaces. Here, we present a versatile sample cleaver to efficiently prepare ionic crystal surfaces under ultra-high vacuum conditions, which is suitable for preparation of softer materials, such as alkali halides, and harder materials, such as metal oxides. One of the advantages of the presented cleaver design is that the cleaving blade and anvil to support the crystal are incorporated into the device. Therefore, no particularly strong mechanical manipulator is needed, and it is compatible with existing vacuum chambers equipped with an xyz-manipulator. We demonstrate atomically flat terraces and the atomic structure of NaCl(001), KBr(001), NiO(001), and MgO(001) cleavage planes prepared in situ under ultra-high vacuum conditions and imaged by low-temperature non-contact atomic force microscopy.

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Gajdardziska-Josifovska, M., B. G. Frost, E. Völkl und L. F. Allard. „On the Faceting of Polar Ceramic Surfaces: Microscopy and Holography Studies of MGO(111) Surfaces“. Proceedings, annual meeting, Electron Microscopy Society of America 54 (11.08.1996): 366–67. http://dx.doi.org/10.1017/s0424820100164295.

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Polar surfaces are those crystallographic faces of ionically bonded solids which, when bulk terminated, have excess surface charge and a non-zero dipole moment perpendicular to the surface. In the case of crystals with a rock salt structure, {111} faces are the exemplary polar surfaces. It is commonly believed that such polar surfaces facet into neutral crystallographic planes to minimize their surface energy. This assumption is based on the seminal work of Henrich which has shown faceting of the MgO(111) surface into {100} planes giving rise to three sided pyramids that have been observed by scanning electron microscopy. These surfaces had been prepared by mechanical polishing and phosphoric acid etching, followed by Ar+ sputtering and 1400 K annealing in ultra-high vacuum (UHV). More recent reflection electron microscopy studies of MgO(111) surfaces, annealed in the presence of oxygen at higher temperatures, have revealed relatively flat surfaces stabilized by an oxygen rich reconstruction. In this work we employ a combination of optical microscopy, transmission electron microscopy, and electron holography to further study the issue of surface faceting.

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Mehr Quellen

Dissertationen zum Thema "Ultra-Flat surfaces"

Yatsui, T., und M. Ohtsu. „Dressed Photon-phonon Technology for Ultra Flat Surface“. Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35264.

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A reduction of the surface roughness, Ra, is required in various applications including electronic devic-es and / or optical devices. Although chemical-mechanical polishing (CMP) has been used to flatten the sur-faces, it is generally limited to reducing Ra to about 2 Å because the polishing pad roughness is as large as 10 m, and the polishing-particle diameters in the slurry are as large as 100 nm. We therefore developed a new polishing method, dressed-photon and phonon etching (DPP etching), that uses dressed photon based on an autonomous phonon-assisted process. DPP etching does not use any polishing pad, with which we obtained ultra-flat silica surface with angstrom-scale average roughness as small as Ra of 0.1 nm. Addi-tionally, we succeeded in reduction of the Ra for the three-dimensional structures. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35264

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Bücher zum Thema "Ultra-Flat surfaces"

Peng, Syd, Hrsg. Surface Subsidence Engineering. CSIRO Publishing, 2020. http://dx.doi.org/10.1071/9781486312559.

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Underground coal mining disturbs both the overburden strata and the immediate floor strata. The subject of surface subsidence deals with the issues associated with the movement of overburden strata, which are the layers from the seam to the surface, where structures and water resources important to human activities are located. Surface Subsidence Engineering provides comprehensive coverage of the major issues associated with surface subsidence. The chapters are written by experts on surface subsidence in the three leading coal producing and consuming countries in the world: Australia, China and the United States. They discuss general features and terminologies, subsidence prediction, subsidence measurement techniques, subsidence impact on water bodies, subsidence damage, mitigation and control, and subsidence on abandoned coal mines. In addition, the final chapter addresses some of the unique features of surface subsidence found in Australian coal mines. The book provides information on coal seams ranging from flat to gently inclined to steep to ultra-steep seams. Written for mining engineers, geotechnical engineers and students of mining engineering, this book covers both theories and practices of surface subsidence. Unlike previous publications, it also deals with the subsidence impact on surface and groundwater bodies, crucial resources that are often neglected by subsidence researchers.

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Buchteile zum Thema "Ultra-Flat surfaces"

Yatsui, Takashi. „Ultra-flat Surface Using a Near-Field Etching“. In Nanophotonic Chemical Reactions, 23–74. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-42843-3_3.

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S. Alegaonkar, Prashant, Vasant N. Bhoraskar und Sudha V. Bhoraskar. „Polyimide: From Radiation-Induced Degradation Stability to Flat, Flexible Devices“. In Polyimide [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101322.

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Polyimide (PI, PMDA-ODA, C22H11N2O5, Kapton-H), is a class of polymer, extensively used in microelectronics and space technology, due to its exceptional mechanical, dielectric, and chemical properties. In space, PI heat shield experiences a harsh environment of energetic electrons, ultra-violet radiation, and atomic oxygen, causing degradation and erosion. Radiation-assisted physicochemical surface modulations in PI, in view of understanding and reducing the degradation in laboratory-based systems, are discussed in the chapter. Strategies for the design and development of 2D, flat, and flexible electromechanical devices by swift heavy ion induced bulk modifications in PI are also described. Fabrication of a couple of such devices, including their performance analysis, is presented.

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Konferenzberichte zum Thema "Ultra-Flat surfaces"

Leistner, A. J. „Ultra-Precision Flat Polishing“. In Optical Fabrication and Testing. Washington, D.C.: Optica Publishing Group, 1985. http://dx.doi.org/10.1364/oft.1985.wbb5.

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Shimizu, T., M. Ohtake, M. Futamoto, F. Kirino und N. Inaba. „Formation of L10-FePt(001) ultra-thin films with flat surfaces using VC and VN underlayers“. In 2017 IEEE International Magnetics Conference (INTERMAG). IEEE, 2017. http://dx.doi.org/10.1109/intmag.2017.8007588.

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Kubota, N., A. Kobayashi, M. S. Mayeed und T. Kato. „Pressure in Ultra Thin Perfluoropolyether Film“. In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64257.

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The density and pressure variations in the ultra thin liquid perfluoropolyether (PFPE) film (2nm) are carried out by Monte Carlo simulations of Lennard-Jones systems. First of all, the variations of density and pressure of ultra thin PFPE film that has a free surface on the flat substrate are carried out. The substrate is assumed to be continuous without atomic structure and exerting Lennard-Jones potential on liquid molecules in the ultra thin film. Next, the variations of density and pressure in the ultra thin PFPE liquid film between the two solids are examined. This is assumed to be due to the contact between the flying head and the PFPE film. From results of the 2500 steps calculation, it is clarified that the density distribution between two solids becomes symmetrical in shape and the pressure distributions concentrate on the substrate surface and the flying head surface do not occur in the liquid between the two surfaces.

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Han, Guoqiang, Zhuangde Jiang, Weixuan Jing und Mingzhi Zhu. „Effects of Substrate Properties, Film Thickness and Evaporation Rate on the Surface Roughness of Ultra Thin Titanium Films“. In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21096.

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Ultra thin (less than 50nm) titanium films with various thicknesses are systematically deposited on different substrates by electron-beam evaporation at various deposition rates in order to correlate flat titanium film surface roughness with deposition process parameters. In this paper, the influences of the substrate surface properties, film thickness and evaporation rate on surface roughness of flat ultra thin titanium films are clarified. In this study, distinct and abrupt steps on the film surface were fabricated by masks pasted on the substrate surfaces during the deposition process. The step can be scanned with stylus profilometer to reveal the height of the step (the thickness of the thin film). Ultra thin films with height 20–50 nm were routinely measured in this way. It is important to notice that ultra thin titanium films with different surface roughness but having the same film thickness can be obtained in a controllable way. Therefore, the control of substrate surface roughness, film thickness and evaporation process is essential to prepare ultra thin titanium films with desired surface properties in reproducible way for further biological and nanostructure investigations of these materials.

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Xu, Zhongming, und Ping Huang. „Calculating Friction Force by the Variation of Potential on the Contact Surfaces During Sliding“. In ASME 2005 International Mechanical Engineering Congress and Exposition. ASMEDC, 2005. http://dx.doi.org/10.1115/imece2005-80556.

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In the present paper, a method based on energy dissipation mechanism of the Independent Oscillator Model is used to calculate friction force and friction coefficient of two flat surfaces with a relative motion. The method is simplified to calculate friction work by the potential change of contact surfaces during sliding, which can be gained by a universal adhesive energy function. The results reveal the relationships between friction force and parameters of a tribo-system such as surface energy and microstructure of interfacial material. The numerical solutions of the known experimental data agree with that of Bowden’s equation, and they agree with Lantz’s experimental results carried out with an ultra high vacuum atomic-force microscope as well. It shows the method is practical.

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Kakuta, Akira, und Shuhei Maruta. „Autonomously Generating Nano-Micro Textured Ultra Flat Smooth Surfaces by Applying Molecular Beam Epitaxy with Helicon Sputtering Molecular Beam Source for Nanoimprint Die“. In WCMNM 2018 World Congress on Micro and Nano Manufacturing. Singapore: Research Publishing Services, 2018. http://dx.doi.org/10.3850/978-981-11-2728-1_66.

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Li, Huiyu, Yu Wang und Guangwei Chen. „The design of a beam shaping lens with flat surfaces and ultra-thin thickness to convert a Gaussian beam to a top-hat beam“. In Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), herausgegeben von Yue Yang. SPIE, 2022. http://dx.doi.org/10.1117/12.2654634.

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Theofilis, Vassilios, Michel O. Deville, Peter W. Duck und Alexander Fedorov. „On Numerical Prediction of the Stability of Hypersonic Boundary-Layer Flow Over a Row of Microcavities“. In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45635.

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This paper is concerned with the structure of steady two–dimensional flow inside the viscous sublayer in hypersonic boundary–layer flow over a flat surface in which microscopic cavities (‘microcavities’) are embedded. Such a so–called Ultra Absorptive Coating (UAC) has been predicted theoretically [1] and demonstrated experimentally [2] to stabilize passively hypersonic boundary–layer flow. In an effort to further quantify the physical mechanism leading to flow stabilization, this paper focuses on the nature of the basic flows developing in the configuration in question. Direct numerical simulations are performed, addressing firstly steady flow inside a singe microcavity, driven by a constant shear, and secondly a model of a UAC surface in which the two–dimensional boundary layer over a flat plate and a minimum nontrivial of two microcavities embedded in the wall are solved in a coupled manner. The influence of flow– and geometric parameters on the obtained solutions is illustrated. Based on the results obtained, the limitations of currently used theoretical methodologies for the description of flow instability are identified and suggestions for the improved prediction of the instability characteristics of UAC surfaces are discussed.

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Duthie, J. G., L. Z. Kennedy und D. A. Gregory. „Computer Generated Matched Filters by e-Beam Lithography“. In Holography. Washington, D.C.: Optica Publishing Group, 1986. http://dx.doi.org/10.1364/holography.1986.tua1.

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E-beam lithography as a means of realizing computer generated holograms has been discussed by Freyer et al. (1) and by Athale et al. (2). The main advantages of e-beam techniques are the capabilities of focusing electron beams of very narrow dimensions (typically 0.1 to 10 microns) and positioning these beams very accurately on the writing surface. Ultra flat glass plates, plated with chromium then coated with a thin layer of electron sensitive photo-resist, form the writing surfaces. Exposure of the material to the computer located e-beam is followed by development of the photo-resist, and then by etching of the exposed chromium to produce a binary pattern on the glass substrate. Suitable patterns written in this way on the chromium provide a convenient means of achieving holographic elements.

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Chong, William, Mircea Teodorescu, Ashlie Martini und Homer Rahnejat. „Mechanisms of Entrapment and Release of Fluid Droplets From Nano-Scale Surface Features“. In ASME/STLE 2012 International Joint Tribology Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ijtc2012-61201.

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Engineering surfaces are never perfectly flat. They contain micro and nano-scale features on multiple length scales. Predicting the amount of fluid trapped in these minute surface crevices and its controlled release could benefit a variety of practical applications. In a sliding contact, the released fluid could create an ultra-thin film, reducing the direct contact and consequently the boundary friction. Transdermal patches are the least invasive of available subcutaneous drug delivery techniques. The drug is stored in a micro-reservoir and it is released to the skin either through a permeable membrane or through a series of micro needles. The aim of the current paper represents the first attempt to investigate whether a modeling approach encompassing two complementary simulation techniques in an integrated framework can be used to predict the volume of fluid stored in a nano-scale surface feature. Molecular dynamics (MD) simulation could provide accurate modeling of fluid behavior at nano-scale, and statistical mechanics (SM) could provide a fast prediction.

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