Articoli di riviste: "Fabrication"

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R., R., e W. Ritha. "A Fabrication Repertoire Replica Amidst Partisan Commerce Layaway Strategem And Infalllibity Cannibalizing Neutrosophic Fuzzy Number". International Journal of Neutrosophic Science 24, n. 1 (2024): 196–207. http://dx.doi.org/10.54216/ijns.240118.

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Infallibility is an important factor both in fabrication repertoire replica and in the great demand of products. During a fabrication process, more exemplary products with high reliableness aim for increase in product demand although credit rating too is a prominent business strategy. Integrating the above duo concepts, we explain and explore mathematically a fabricating repertoire replica with partisan layaway stratagem and infallibility effect on the fabrication system wherein the demand of the customers is reliant on the product cost and rate of decay is regarded as constant. In this propounded model, commerce layaway stratagem on the fabricator and the customer is acquainted by considering all the achievable sitch due to permitted credit (layaway) duration. As a consequence, considering all the achievable instances for the fabricator and the customer’s layaway duration, seven non-linear optimization issues for the proposed replica are required.

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Hao, Yongcun, Yanlong Wang, Yonghao Liu, Weizheng Yuan e Honglong Chang. "An SOI-based post-fabrication process for compliant MEMS devices". Journal of Micromechanics and Microengineering 34, n. 4 (12 marzo 2024): 045005. http://dx.doi.org/10.1088/1361-6439/ad2f4b.

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Abstract Fabricating compliant microelectromechanical system (MEMS) devices is challenging because they are easily damaged during fabrication. This paper presents a fabrication process based on the silicon-on-insulator (SOI) wafer for compliant MEMS devices. In the fabrication process, tethers were used to enhance the strength of the compliant devices during fabrication and finally melted with an electric current to release the device after fabrication. We discover that the power supply mode and voltage value are very critical for low-resistance tether melting. The fabrication results show that the yield rate of the compliant microgripper increased from 44% to 100%, which is a significant improvement compared with conventional processes. The successful fabrication of the microgripper proved that the proposed SOI-based post-fabrication process is feasible and can be used to fabricate different kinds of compliant devices.

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Coogan, Jeremiah, Candida R. Moss e Joseph A. Howley. "The Socioeconomics of Fabrication: Textuality, Authenticity, and Social Status in the Roman Mediterranean". Arethusa 57, n. 2 (marzo 2024): 227–53. http://dx.doi.org/10.1353/are.2024.a934134.

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Abstract: This article analyses the figure of the "fabricator" within the complex ancient discourses that produce and limit authorial status. We map Roman discourses of textual fabrication in three distinct yet intersecting deployments: the fabrication of documents, the fabrication of texts, and the fabrication of meaning. A wide range of sources from the high Roman empire illuminate how elites used this discourse of fabrication to characterize forms of textual production, invention, and interpretation as illicit. The discourse of fabrication, with its contrasts between elite and banausic skills and spaces, served to manufacture and maintain differences between elite intellectuals and the low-status workers who supported them. Accusations of fabrication were a discursive practice used to dismiss individuals, deride arguments, and (re)produce cultural and social boundaries in the Roman Mediterranean.

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Sowrirajan, M., S. Vijayan, M. Arulraj e J. Sundaresan. "Metallurgical assessments on 316L stainless steel thin walled plate fabricated through GMAW based typical Wire Arc Additive Manufacturing". YMER Digital 21, n. 02 (9 febbraio 2022): 227–37. http://dx.doi.org/10.37896/ymer21.02/23.

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Wire Arc Additive Manufacturing (WAAM) is developing trendy process for the fabrication of metal components nowadays. In the present study, the concept of WAAM is employed but typical concept is used for fabricating a thin walled plate sample using AISI 316L grade of stainless steel. The plate size is limited for ease up to laying only three weld beads in traverse direction rather than vertically as in the case of additive manufacturing. The chemical composition of fabricated sample is analysed for checking the use of WAAM for metal component fabrication. The ferrite number is also found and reported for supporting the fabricated component to withstand the corrosion. The low carbon steel was used as a parent metal to deposit the fabricating stainless steel thin plate. Microstructure of interface between base metal and fabricating metal is also revealed for confirming defect free component fabrication. These results are found to be satisfactory enough and thus the WAAM shall be used for the fabrication of desired components also especially in stainless steels.

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Bakar, Azrena Abu, Masahiro Nakajima, Chengzhi Hu, Hirotaka Tajima, Shoichi Maruyama e Toshio Fukuda. "Fabrication of 3D Photoresist Structure for Artificial Capillary Blood Vessel". Journal of Robotics and Mechatronics 25, n. 4 (20 agosto 2013): 673–81. http://dx.doi.org/10.20965/jrm.2013.p0673.

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We propose a new method for fabricating artificial capillaries using direct laser writing. IP-L and Ormocomp are tested as photoresist materials. Three different microstructures were fabricated from IP-L: a porous hollow pipe microstructure, a 3 × 3 array of twig microstructures, and an array of hollow twig microstructures. Porous hollow pipe microstructures of different diameters were fabricated from Ormocomp, a biocompatible photoresist. These designs resemble capillaries. IP-L and Ormocomp fabrication parameters, such as laser power, numerical aperture, fabrication time, and fabrication model, are compared. Fabrication time is related to the fabrication model chosen during the direct laser writing process. Combined model fabrication is recommended over solid model fabrication because it results in shorter fabrication time and a more robust microstructure that is more likely to maintain its shape on the substrate after development. Laser power is another important parameter controlling fabrication. IP-L fabrication withstands up to 20 mW of laser power, unlike Ormocomp microstructures, which require laser power of less than 18 mW. IP-L and Ormocomp photoresist stiffness is also evaluated. The fabrication of artificial capillaries is important in developing vascular simulators that enable researchers to understand, for example, blood pressure in the kidney glomerulus.

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Deisinger, Ulrike, Sabine Hamisch, Matthias Schumacher, Franzika Uhl, Rainer Detsch e Günter Ziegler. "Fabrication of Tailored Hydroxyapatite Scaffolds: Comparison between a Direct and an Indirect Rapid Prototyping Technique". Key Engineering Materials 361-363 (novembre 2007): 915–18. http://dx.doi.org/10.4028/www.scientific.net/kem.361-363.915.

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In the last few years new fabrication methods, called rapid prototyping (RP) techniques, have been developed for the fabrication of hydroxyapatite scaffolds for bone substitutes or tissue engineering applications. With this generative fabrication technology an individual tailoring of the scaffold characteristics can be realised. In this work two RP techniques, a direct (dispense-plotting) and an indirect one (negative mould technique), are described by means of fabricating hydroxyapatite (HA) scaffolds for bone substitutes or bone tissue engineering. The produced scaffolds were characterised, mainly regarding their pore and strut characteristics. By these data the performance of the two fabrication techniques was compared. Dispense-plotting turned out to be the faster technique while the negative mould method was better suited for the fabrication of exact pore and strut geometries.

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Wahyuni, Wulan Tri, Budi Riza Putra, Achmad Fauzi, Desi Ramadhanti, Eti Rohaeti e Rudi Heryanto. "A Brief Review on Fabrication of Screen-Printed Carbon Electrode: Materials and Techniques". Indo. J Chem. Res. 8, n. 3 (31 gennaio 2021): 210–18. http://dx.doi.org/10.30598//ijcr.2021.7-wul.

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Screen-printed carbon electrode (SPCE) is one of the most interesting designs to combine a working (from carbon based material), reference, and counter electrode in a single-printed substrate. SPCE has been used in many electrochemical measurements due to its advantages for analysis in microscale. This paper summarises the main information about SPCE fabrication from the material and fabrication technique aspect on the flat substrate based on the work that has been published in the last 30 years. The success of SPCE fabrication is highly dependent on the composition of conductive ink which consists of conductive materials, binder, and solvents; substrate; and fabrication techniques. Among the carbon-based materials, the most widely used for SPCE fabrications are graphite, graphene, and carbon nanotubes. The frequent binder used are polymer-based materials such as polystyrene, polyaniline, poly 3,4-ethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS), and polyvinyl chloride. The solvents used for SPCE fabrication are varied including water and various organic solvents. The main characteristics of the SPCE substrate should be inert in order to avoid any interferences during electrochemical measurements. The screen printing and inkjet printing technique are preferred for SPCE fabrication due to easy fabrication and the possibility for mass production of SPCE.

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Wahyuni, Wulan Tri, Budi Riza Putra, Achmad Fauzi, Desi Ramadhanti, Eti Rohaeti e Rudi Heryanto. "A Brief Review on Fabrication of Screen-Printed Carbon Electrode: Materials and Techniques". Indonesian Journal of Chemical Research 8, n. 3 (31 gennaio 2021): 210–18. http://dx.doi.org/10.30598/ijcr.2021.8-wul.

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Abstract (sommario):

Screen-printed carbon electrode (SPCE) is one of the most interesting designs to combine a working (from carbon based material), reference, and counter electrode in a single-printed substrate. SPCE has been used in many electrochemical measurements due to its advantages for analysis in microscale. This paper summarises the main information about SPCE fabrication from the material and fabrication technique aspect on the flat substrate based on the work that has been published in the last 30 years. The success of SPCE fabrication is highly dependent on the composition of conductive ink which consists of conductive materials, binder, and solvents; substrate; and fabrication techniques. Among the carbon-based materials, the most widely used for SPCE fabrications are graphite, graphene, and carbon nanotubes. The frequent binder used are polymer-based materials such as polystyrene, polyaniline, poly 3,4-ethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS), and polyvinyl chloride. The solvents used for SPCE fabrication are varied including water and various organic solvents. The main characteristics of the SPCE substrate should be inert in order to avoid any interferences during electrochemical measurements. The screen printing and inkjet printing technique are preferred for SPCE fabrication due to easy fabrication and the possibility for mass production of SPCE.

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9

Sun, Yuting, Jiayu Ding, Xiaoyu Xia, Xiaohan Wang, Jianwen Xu, Shuqing Song, Dong Lan, Jie Zhao e Yang Yu. "Fabrication of airbridges with gradient exposure". Applied Physics Letters 121, n. 7 (15 agosto 2022): 074001. http://dx.doi.org/10.1063/5.0102555.

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In superconducting quantum circuits, airbridges are critical for eliminating parasitic slotline modes of coplanar waveguide circuits and reducing crosstalks between direct current magnetic flux biases. Here, we present a technique for fabricating superconducting airbridges. With this technique, a single layer of photoresist is employed, and the gradient exposure process is used to define the profile of airbridges. In order to properly obtain the bridge profile, we design exposure dosage based on residual photoresist thickness and laser power calibrations. Compared with other airbridge fabrication techniques, the gradient exposure fabrication technique provides the ability to produce lossless superconducting airbridges with flexible size and, thus, is more suitable for large-scale superconducting quantum circuits. Furthermore, this method reduces the complexity of the fabrication process and provides a high fabrication yield.

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Xie, Ke Fei, Ke Fu Yao e Tian You Huang. "Influence of the Melting Temperature on the Fabrication of a Ti-Cu-Zr-Ni-Sn Bulk Metallic Glass". Materials Science Forum 688 (giugno 2011): 413–18. http://dx.doi.org/10.4028/www.scientific.net/msf.688.413.

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The successful fabrication of bulk glassy alloys depends on the chemical composition and fabricating process. To prepare bulk metallic glasses (BMGs) by casting with copper mould, the cooling ability of the mould and the melting temperature are considered. In this work the influence of the melting temperature on the fabrication of the BMGs is studied by varying the suction casting temperature of the Ti44.10Cu.37.04Zr9.80Ni7.06Sn2.00alloy by varying the current density employed in melting process. The results show that there is an optimum melting temperature range for fabricating the Ti-Cu-Zr-Ni-Sn BMG by suction casting. When the temperature is outside this range, the crystalline phases occur within the glassy matrix. The influence of the melting temperature on the fabrication of the Ti-Cu-Zr-Ni-Sn BMG is discussed.

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Emhemmed, Adel, Abdulbast Kriama, Osama Terfaas e Graham Green. "New Method to Fabrication 3D Micro-Device Structures". Applied Mechanics and Materials 492 (gennaio 2014): 286–90. http://dx.doi.org/10.4028/www.scientific.net/amm.492.286.

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This paper present a new approach for fabricating 3D micro structures based on the elevated structures. The new fabrication method involves combinations of several basic techniques, but a key enabling techniques for the successful development of the fabrication process is combining the photolithography with e-beam lithography processes to create 3-D structures

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Ishaq, Musah, Momoh Imonikhe e Momoh Bello. "Skill Development and Apprentices Performance in Aluminium Sub-Sector: A Way Out of Nigeria Economic Quagmire". International Journal of Operational Research in Management, Social Sciences & Education 10, n. 1 (14 giugno 2024): 284–96. http://dx.doi.org/10.48028/iiprds/ijormsse.v10.i1.19.

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Aluminium products and its fabrications seem to be changing continuously over time. ineffective acquired knowledge resulting t substandard products fabrication created a negative difference. This on the long run damages the image of the organisation, by hampering customer loyalty. It is based on this problem that the researcher explored into the relationship that exist between skill development and performance of apprentices in aluminium fabrication (specically, the researcher tried to delve into the nature and type of relationship that exist between skill acquisition and apprenticeship competence, in product fabrications). Correlation survey research design was adopted. data was sourced from primary and secondary sources with the aid of structured questionnaire. Karl Pearson's product moment correlation coefcient was employed in analyzing data. It was discovered that skill acquisition (Skill development) has a signicant positive relationship with apprentice competence (apprenticeship performance). From the ndings, it was concluded that proper skill development created room for perfect aluminium product fabrication. This resulted to effective product fabrication that has stood out among the pairs in the aluminium industry. The researchers therefore recommended that apprentices should be impacted with both theory and practical skills that are involve in knowledge acquisition SSCE should be a pre-requisite for admitting apprentices into the programme.

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Dusmukhamedov, Shavkat, Chu-Nui Lee, Seung-Mi Jeong e Byung-Ho Choi. "Digital Denture Fabrication: A Technical Note". Applied Sciences 11, n. 17 (31 agosto 2021): 8093. http://dx.doi.org/10.3390/app11178093.

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Fabricating a complete denture in a conventional manner may be complicated and difficult. The purpose of this article was to describe the benefits of a fully digital workflow and fabrication procedure of complete dentures based on digital impressions of edentulous jaws. The digital data for the workflow were acquired using an intraoral scanner and were then used to design the denture base and teeth. The resulting data were exported to a 3D printer or a milling machine for denture fabrication.

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Kim, Kiho, Sang-Gyu Park, Hoon Song e Jeong-Yong Park. "Metallic Fuel Fabrication Process Development in Remote Fuel Fabrication Mock-Up at KAERI". Science and Technology of Nuclear Installations 2020 (15 dicembre 2020): 1–10. http://dx.doi.org/10.1155/2020/8848991.

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This paper presents a remote testbed for metallic fuel fabrication using surrogates or depleted uranium. The testbed named “remote fuel fabrication mock-up (RFFM)” was created at the Korea Atomic Energy Research Institute and specifically designed to incorporate remote operation and maintenance. The subsystems of the RFFM are described, and test results regarding remotely conducted metallic fuel slug fabrication at the RFFM are also presented. After fabricating fuel slugs using copper ingots, their specifications and properties were analyzed and evaluated using chemical analysis, radiographic tests, and diameter and weight measurements. Analysis results showed that the fabricated metallic fuel slugs have an acceptance rate of more than 90% and a casting ratio (ratio of weight of injected metal to charged metal) of more than 0.7. Moreover, operations involving remote handling of in-cell equipment were also satisfactory.

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Kang, Wenjun, Masafumi Seigo, Huapan Xiao, Daodang Wang e Rongguang Liang. "Experimental Studies on Fabricating Lenslet Array with Slow Tool Servo". Micromachines 13, n. 10 (21 settembre 2022): 1564. http://dx.doi.org/10.3390/mi13101564.

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On the demand of low-cost, lightweight, miniaturized, and integrated optical systems, precision lenslet arrays are widely used. Diamond turning is often used to fabricate lenslet arrays directly or molds that are used to mold lenslet arrays. In this paper, mainly by real-time monitoring position following error for slow tool servo, different fabrication parameters are quantitatively studied and optimized for actual fabrication, then by actual fabrication validation, uniform and high-fidelity surface topography across the actual whole lenslet array is achieved. The evaluated fabrication parameters include sampling strategy, inverse time feed, arc-length, etc. The study provides a quick, effective, and detailed reference for both convex and concave lenslet array cutting parameter selection. At the end, a smooth zonal machining strategy toolpath is demonstrated for fabricating concave lenslet arrays.

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Das, Abhijit, Nitin Gupta, Ajay Kumar Agrawal e Anuj Dhawan. "Large-area and low-cost SERS substrates based on a gold-coated nanostructured surface fabricated on a wafer-scale". RSC Advances 12, n. 16 (2022): 9645–52. http://dx.doi.org/10.1039/d2ra00407k.

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Ghaznavi, Amirreza, Jie Xu e Seth A. Hara. "A Non-Sacrificial 3D Printing Process for Fabricating Integrated Micro/Mesoscale Molds". Micromachines 14, n. 7 (30 giugno 2023): 1363. http://dx.doi.org/10.3390/mi14071363.

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Three-dimensional printing technology has been implemented in microfluidic mold fabrication due to its freedom of design, speed, and low-cost fabrication. To facilitate mold fabrication processes and avoid the complexities of the soft lithography technique, we offer a non-sacrificial approach to fabricate microscale features along with mesoscale features using Stereolithography (SLA) printers to assemble a modular microfluidic mold. This helps with addressing an existing limitation with fabricating complex and time-consuming micro/mesoscale devices. The process flow, optimization of print time and feature resolution, alignments of modular devices, and the advantages and limitations with the offered technique are discussed in this paper.

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Wang, Bao-Xu, Jin-Yong Qi, Yi-Ming Lu, Jia-Xin Zheng, Ying Xu e Xue-Qing Liu. "Rapid Fabrication of Smooth Micro-Optical Components on Glass by Etching-Assisted Femtosecond Laser Modification". Materials 15, n. 2 (17 gennaio 2022): 678. http://dx.doi.org/10.3390/ma15020678.

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Femtosecond laser (fs-laser) is unfavorable in applications for the fabrication of micro-optical devices on hard materials owing to the problems of low fabrication efficiency and high surface roughness. Herein, a hybrid method combining fs-laser scanning, subsequent etching, and annealing was proposed to realize micro-optical devices with low roughness on glass. Compared to traditional laser ablation, the fabrication efficiency in this work was improved by one order of magnitude, and the surface roughness was decreased to 15 nm. Using this method, aspherical convex microlenses and spherical concave microlenses that possess excellent focusing and imaging properties are realized on photosensitive glass. The diameter and height of the microlenses were controlled by adjusting the fabrication parameters. These results indicate that the fs-laser-based hybrid method will open new opportunities for fabricating micro-optical components on hard materials.

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Yue, Ying, e Nian Zhen. "POROUS SILICON FABRICATION PROCESS FOR OPTICAL REFLECTORS". EPH - International Journal of Applied Science 4, n. 2 (27 giugno 2018): 9–12. http://dx.doi.org/10.53555/eijas.v4i2.65.

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We describe the use of porous silicon fabrication technique for fabricating non-manhattan structures in silicon using wet etching. The fabrication method is simple to set up, economical and produces smooth etched surface. A solid source diffusion of N++ in a P type wafer with low stress thermally grown silicon nitride is used as a masking layer. Comparison of porous silicon etches with wafers solid source diffusion and implanted diffusion is presented. The result show that areas where a solid source diffusion is used form an etch angle of 70-80°, however using an implanted diffusion the etch angle is closer to 90°. The selectivity of the etch during porous silicon fabrication using any of the above two as masking layer results in fabrication of high aspect ratio non-manhattan structures. These structures since are wet etched do not have surface roughness and can be used for optical applications.

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Lee, Sung Ho, Cheol Woo Park e Moon Kyu Kwak. "Continuous Fabrication of Wide-Tip Microstructures for Bio-Inspired Dry Adhesives via Tip Inking Process". Journal of Chemistry 2019 (2 gennaio 2019): 1–5. http://dx.doi.org/10.1155/2019/4827918.

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In this paper, we report a new method for continuous fabrication of dry adhesives composed of microstructures with mushroom-shaped ends. Conventional mushroom microstructure fabrication is performed with a simple molding technique using a reversed phase master. In a typical fabrication process, thin- and wide-tip portions may be ripped during demolding, making it difficult to use in a continuous process. It is also difficult to apply the mushroom structure master to a continuous process system in roll form. Here, a continuous fabrication process was developed by applying the method of fabricating a wide tip using a tip inking method after forming a micropillar. Through the continuous process, the dry adhesive was successfully fabricated and the durability was measured with a reasonable pull-off strength (13 N/cm2). In addition to the reasonable adhesion, high durability is guaranteed, and fabricated dry adhesives are expected to be used in various fields.

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Lyon, Bradley J., Adrianus I. Aria e Morteza Gharib. "Feasibility Study of Carbon Nanotube Microneedles for Rapid Transdermal Drug Delivery". MRS Proceedings 1569 (2013): 239–44. http://dx.doi.org/10.1557/opl.2013.803.

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ABSTRACTWe introduce a new approach for fabricating hollow microneedles using vertically-aligned carbon nanotubes (VA-CNTs) for rapid transdermal drug delivery. Here, we discuss the fabrication of the microneedles emphasizing the overall simplicity and flexibility of the method to allow for potential industrial application. By capitalizing on the nanoporosity of the CNT bundles, uncured polymer can be wicked into the needles ultimately creating a high strength composite of aligned nanotubes and polymer. Flow through the microneedles as well as in vitro penetration of the microneedles into swine skin is demonstrated. Furthermore, we present a trade study comparing the difficulty and complexity of the fabrication process of our CNT-polymer microneedles with other standard microneedle fabrication approaches.

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Rogers, Bill, Gordon W. Bosker, Richard H. Crawford, Mario C. Faustini, Richard R. Neptune, Gail Walden e Andrew J. Gitter. "Advanced Trans-Tibial Socket Fabrication Using Selective Laser Sintering". Prosthetics and Orthotics International 31, n. 1 (marzo 2007): 88–100. http://dx.doi.org/10.1080/03093640600983923.

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There have been a variety of efforts demonstrating the use of solid freeform fabrication (SFF) for prosthetic socket fabrication though there has been little effort in leveraging the strengths of the technology. SFF encompasses a class of technologies that can create three dimensional objects directly from a geometric database without specific tooling or human intervention. A real strength of SFF is that cost of fabrication is related to the volume of the part, not the part's complexity. For prosthetic socket fabrication this means that a sophisticated socket can be fabricated at essentially the same cost as a simple socket. Adding new features to a socket design becomes a function of software. The work at The University of Texas Health Science Center at San Antonio (UTHSCSA) and University of Texas at Austin (UTA) has concentrated on developing advanced sockets that incorporate structural features to increase comfort as well as built in fixtures to accommodate industry standard hardware. Selective laser sintering (SLS) was chosen as the SFF technology to use for socket fabrication as it was capable of fabricating sockets using materials appropriate for prosthetics. This paper details the development of SLS prosthetic socket fabrication techniques at UTHSCSA/UTA over a six-year period.

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Li, C., M. Boban e A. Tuteja. "Open-channel, water-in-oil emulsification in paper-based microfluidic devices". Lab on a Chip 17, n. 8 (2017): 1436–41. http://dx.doi.org/10.1039/c7lc00114b.

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de Sagazan, O., C. Lebreton, E. Jacques e L. Pichon. "Nouveau jeu de masques pour la prise en main des étapes de base de fabrication en salle blanche de composants microélectroniques". J3eA 23 (2024): 1004. http://dx.doi.org/10.1051/j3ea/20241004.

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Depuis plus de 30 ans le CCMO propose des formations aux techniques de fabrication de micro-composants en salle blanche. L’actualité récentes à remis en lumière l’importance stratégiques de ces technologies de micro-fabrications. A travers un TP de 4 jours, le CCMO permet à des élèves de second cycle, de découvrir l’univers de la fabrication des composants semiconducteurs ainsi que de leurs méthodes de tests électriques. Ainsi au bout de la formation les élèves auront réalisé et testé des transistors, des diodes et même des circuits logiques simples.

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Shrestha, Bibeka, Naresh Manandhar e Sunil Kumar Joshi. "Knowledge of occupational health hazards and practice of personal protective equipment among fabrication workers in Kathmandu district, Nepal". International Journal of Occupational Safety and Health 10, n. 2 (10 dicembre 2020): 115–23. http://dx.doi.org/10.3126/ijosh.v10i2.33330.

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Background: Fabrication work is one of the hazardous occupations in which workers are exposed to different occupational hazards and injuries. But the workers lack proper knowledge about protecting themselves from those hazards. This study was conducted, to assess knowledge about occupational health hazards among fabrication workers and to find out the practice of Personal Protective Equipment (PPE) in fabrication works. Methods: A cross-sectional study was conducted among 394 fabricator workers of Kathmandu District by using a multi-stage sampling technique. Participants were interviewed with a pre-tested semi-structured questionnaire. Results: All the participants were male, and their age ranged from 19-60 years with the mean age of 32.3 years. 71.3% of participants had work-related health complains, among which arc eye (85.76%) was the most common. Among them, 87.1% had at least used one PPE. There was a significant association between awareness about occupational hazards and work experience of fabrication workers (p=0.001), and the practice of PPE with religion (p<0.01). Conclusions: This study found that fabrication workers were aware of occupational hazards and the use of PPE during the fabrication work. But the practice of PPE was not enough to protect them from the occupational hazards.

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Rana, Shilpa, e Du-Hyeong Lee. "Fully Digitalized Workflow of Flipper Fabrication: Different Three-Dimensional Printing Strategies and Characteristics". Applied Sciences 14, n. 7 (28 marzo 2024): 2838. http://dx.doi.org/10.3390/app14072838.

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A flipper is an interim removable partial denture used for immediate esthetic restoration and space maintenance for a limited period before definitive treatment. Traditional methods for fabricating flippers are labor-intensive and manual. With the advent of technological advancement in dentistry, fully digitalized fabrication including computer designing and three-dimensional (3D) printing can be used. This study aimed to demonstrate the complete digital workflow for fabricating flippers and compare the features of different digital methods. In a partially edentulous patient, three flippers were fabricated using different digital protocols: individual printing (tooth and base parts) and combination, i.e., one-body printing and gingival layering and one-body printing and gingival coloring. Each flipper was tried into the oral cavity, and the adaptation of flippers was evaluated using the triple-scan technique. This study confirms that fully digital fabrication of a flipper is an effective method compared with traditional methods and shows various digital workflows available in 3D printing. Thus, an appropriate fabrication method must be selected for each situation.

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Janeva, Nadica, Gordana Kovacevska e Edvard Janev. "Complete Dentures Fabricated with CAD/CAM Technology and a Traditional Clinical Recording Method". Open Access Macedonian Journal of Medical Sciences 5, n. 6 (6 ottobre 2017): 785–89. http://dx.doi.org/10.3889/oamjms.2017.169.

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The introduction of computer-aided design/computer-aided manufacturing (CAD/CAM) technology into complete denture (CD) fabrication ushered in a new era in removable prosthodontics. Commercially available CAD/CAM denture systems are expected to improve upon the disadvantages associated with conventional fabrication. The purpose of this report is to present the workflow involved in fabricating a CD with a traditional clinical recording method and CAD/CAM technology and to summarize the advantages to the dental practitioner and the patient.

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Fox, S., J. Polak, M. Schmid Daners e M. Meboldt. "Fabrication of Bioengineered Skin by Injection Molding: A Feasibility Study on Automation". SLAS TECHNOLOGY: Translating Life Sciences Innovation 24, n. 5 (28 giugno 2019): 506–14. http://dx.doi.org/10.1177/2472630319857966.

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The use of bioengineered skin has facilitated fundamental and applied research because it enables the investigation of complex interactions between various cell types as well as the extracellular matrix. The predominantly manual fabrication of these living tissues means, however, that their quality, standardization, and production volume are extremely dependent on the technician’s experience. Simple laboratory automation could facilitate the use of living tissues by a greater number of research groups. We developed and present here an injection molding technique for the fabrication of bilayered skin equivalents. The tissue was formed automatically by two separate injections into a customized mold to produce the dermal and epidermal skin layers. We demonstrated the biocompatibility of this fabrication process and confirmed the resulting bilayered morphology of the bioengineered skin using histology and immunohistochemistry. Our findings highlight the possibility of fabricating multilayered living tissue by injection molding, suggesting that further investigation into this automation method could result in the rapid and low-cost fabrication of standardized bioengineered skin.

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Osman, Razis, e Shadiya Mohamed Saleh Ba Qutayan. "Overcoming Data Fabrication in Scientific Research". Journal of Science, Technology and Innovation Policy 9, n. 1 (11 giugno 2023): 26–31. http://dx.doi.org/10.11113/jostip.v9n1.128.

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The goal of this study is to identify the factors that contribute to the occurrence of data fabrication in scientific research and to propose prevention methods that can be implemented by research agencies or research institutions. The study is a full literature review; it analyzes previous studies related to the contributing factors of researchers fabricating data and its effects such as the impact on the world of scientific research in addition to damaging the researcher's credibility and causing a loss of public trust in the findings of scientific research. Furthermore, another effect of data fabrication is the retraction of the publication, which will result in the researchers' lifetime ban from conducting scientific research. It is proven that data fabrication is a significant contributor to the retraction of papers, with a percentage of 49.4%. The finding of this study is to come out with several suggestions for prevention strategies for data fabrication, such as empowering training in research integrity and enforcement of academic research policy. It also concludes with recommendations for improving research ethics with a well-designed plan for fostering research integrity in various platforms for a better future.

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Gupta, Shreya, e Sandhya Jain. "The Churro Fabricator". International Journal of Dentistry Research 8, n. 2 (30 agosto 2023): 46–48. http://dx.doi.org/10.31254/dentistry.2023.8205.

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Technique to prepare an easy, cheap, relatively safe and portable fabricator for the Churro Jumper appliance has been put forth. The Churro fabricator simplifies the fabrication process, minimizes the risk of operator’s injury and reduces labor involved in the Churro Jumper construction.

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Bender, John, Joel Anspach e Tom Tonnessen. "Manufacturing advances in large grazing-incidence optics". Journal of Synchrotron Radiation 5, n. 3 (1 maggio 1998): 832–35. http://dx.doi.org/10.1107/s0909049598000673.

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The fabrication of large grazing-incidence mirrors imposes needs for special fabrication and coating equipment, facilities, and raw materials. The economic realization of such optics has been readily accomplished through close interactions between the mirror users, the fabricator and the manufacturer of the raw material designated as mirror substrate. The manufacture and delivery of a 1.4 m flat and 1.0 m conical mirror are used to provide examples of recently demonstrated manufacturing technologies and effective interactions between participating organizations.

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Xu, Zong Wei, Ying Chun Liang, Shen Dong, Li Qiang Gu, T. Sun e Qing Liang Zhao. "Carbon Nanotube as Probe for Atomic Force Microscope". Key Engineering Materials 315-316 (luglio 2006): 758–61. http://dx.doi.org/10.4028/www.scientific.net/kem.315-316.758.

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An improved arc welding method was developed to fabricate carbon nanotube probe under direct view of optical microscope. The new fabrication method here needs not coat silicon probe in advance with metal film, which greatly reduces the fabrication’s difficulty. An easy method for shortening the nanotube probe was also developed. The improved fabrication method here is simple and reliable. The fabricated carbon nanotube probe showed good properties of higher length-to-diameter aspect ratio, better wear characteristics than silicon probe.

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Gergess, Antoine, e Rajan Sen. "Fabrication Aids for Cold Straightening I-Girders". Engineering Journal 41, n. 2 (30 giugno 2004): 69–84. http://dx.doi.org/10.62913/engj.v41i2.826.

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Fabrication out-of-straightness in steel girders can be rectified using heat straightening or cold straightening. While heat straightening has been extensively researched, little information is available on cold straightening where loads are used to achieve the same result. This paper provides an analytical framework for an innovative cold straightening (also referred to as cold bending) system developed by a fabricator. Maximum safe limits on loads, out-of-straightness and load frame configurations that are consistent with prevailing "Load and Resistance Factor Design" (LFRD) criteria are proposed. Fabrication aids for Grade 250 (Fy = 36 ksi) and 345 (Fy = 50 ksi) steel are developed and their application illustrated by three numerical examples.

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Song, Changhui, Aibing Huang, Yongqiang Yang, Zefeng Xiao e Jia-kuo Yu. "Effect of energy input on the UHMWPE fabricating process by selective laser sintering". Rapid Prototyping Journal 23, n. 6 (17 ottobre 2017): 1069–78. http://dx.doi.org/10.1108/rpj-09-2015-0119.

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Purpose This study aims to achieve customized prosthesis for total joint arthroplasty and total hip arthroplasty. Selective laser sintering (SLS) as additive manufacturing could enable small-scale fabrication of customized Ultra High Molecular Weight Polyethylene (UHMWPE) components; however, the processes for SLS of UHMWPE need to be improved. Design/methodology/approach This paper begins by improving the preheating system of the SLS fabricating equipment and then fabricating cuboids with the same size and cuboids with same volume and different size to study the warpage, demonstrating the effect of the value and uniformity of the preheating temperature on component fabrication. Warpage, density and tensile properties are investigated from the perspective of energy input density. Finally, complicated industrial parts are produced effectively by using optimized technological parameters. Findings The results show that components can be fabricated effectively after the optimization of the SLS technological parameters i.e. the preheating temperature the laser power the scanning interval and the scanning speed. The resulting warpage was found to be less than 0.1 mm along with the density as 83.25 and the tensile strength up to 14.1 Mpa. UHMWPE sample parts with good appearance and strength are obtained after ascertaining the effect of each factor on the fabrication of the sample parts. Originality/value It is very challenging to fabricate UHMWPE sample parts by SLS. This is a new step in the fabrication of customized UHMWPE sample parts.

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Wang, Xiao Hui, Zhi Ding e Yu Zhen Ma. "Turning of Micro-Structured Surfaces Based on a Fast Tool Servo System". Applied Mechanics and Materials 684 (ottobre 2014): 308–12. http://dx.doi.org/10.4028/www.scientific.net/amm.684.308.

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A fast tool servo system is developed for the fabrication of micro-structured surface on a diamond turning machine. The fast tool servo (FTS) system in this investigation employs a piezoelectric actuator to actuate the diamond tool and a capacitance probe as the feed back sensor. To compensate the inherent nonlinear hysteresis behavior of the piezoelectric actuator, Proportional Integral (PI) closed loop control with a feed-forward predictor is implemented. The result of closed loop experiment in FTS demonstrates that the tracking error has been reduced to a level of less than 150nm. Actual experiment of fabricating the sinusoidal grid surface was performed on an ultra-precision diamond turning machine designed by Center of Precision Engineering of HIT. The fabrication of a sinusoidal grid surface has indicated the effectiveness of the fabrication system.

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Reiser, Susan L., e Rebecca F. Bruce. "Fabrication". ACM SIGCSE Bulletin 41, n. 1 (4 marzo 2009): 382–86. http://dx.doi.org/10.1145/1539024.1509001.

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37

Cambier, F. "Fabrication". Materials Science and Engineering: A 109 (marzo 1989): 1. http://dx.doi.org/10.1016/0921-5093(89)90557-1.

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38

Zhao, Yong Mei, Jin Ning, Guo Wei Han e Chao Wei Si. "Fabrication and Characterisation of Polysilicon-Based Clamped-Clamped Filter". Key Engineering Materials 483 (giugno 2011): 112–16. http://dx.doi.org/10.4028/www.scientific.net/kem.483.112.

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The rapid growth of micromaching technology makes the miniaturized or integrated MEMS resonator or filter become possible. This paper reports on the fabrication and characterization of the polysilicon-based RF MEMS filter, comprised of the two clamped-clamped resonators coupled with the micro dimensions beam. The surface micromaching technology has been adopted to fabricate the clamped-clamped filter. The fabricating process and the optimization of the typical micromaching process for the MEMS RF filter are illustrated in detail. After the fabrication, the resonating characteristics are measured. The center frequency of 30 MHz of the micromechanical bandpass filter is demonstrated.

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Scott, Simon, e Zulfiqur Ali. "Fabrication Methods for Microfluidic Devices: An Overview". Micromachines 12, n. 3 (18 marzo 2021): 319. http://dx.doi.org/10.3390/mi12030319.

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Microfluidic devices offer the potential to automate a wide variety of chemical and biological operations that are applicable for diagnostic and therapeutic operations with higher efficiency as well as higher repeatability and reproducibility. Polymer based microfluidic devices offer particular advantages including those of cost and biocompatibility. Here, we describe direct and replication approaches for manufacturing of polymer microfluidic devices. Replications approaches require fabrication of mould or master and we describe different methods of mould manufacture, including mechanical (micro-cutting; ultrasonic machining), energy-assisted methods (electrodischarge machining, micro-electrochemical machining, laser ablation, electron beam machining, focused ion beam (FIB) machining), traditional micro-electromechanical systems (MEMS) processes, as well as mould fabrication approaches for curved surfaces. The approaches for microfluidic device fabrications are described in terms of low volume production (casting, lamination, laser ablation, 3D printing) and high-volume production (hot embossing, injection moulding, and film or sheet operations).

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Feng, Yue, Hui Lin, Chong Chen, Xuezhuan Yi, Yanru Tang, Shuai Zhang, Ting Yu, Wei Chen e Shengming Zhou. "Fabrication of transparent Tb3Ga5O12 ceramic". Chinese Optics Letters 13, n. 3 (2015): 031603. http://dx.doi.org/10.3788/col201513.031603.

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Kumar, B. Phanindra, S. Soumya Reddy e R. Sudharshan P. Vamshi Krishna. "Fabrication of Electric Two Wheeler". International Journal of Trend in Scientific Research and Development Volume-3, Issue-3 (30 aprile 2019): 1378–81. http://dx.doi.org/10.31142/ijtsrd23377.

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42

Yue Feng, Yue Feng, Hui Lin Hui Lin, Chong Chen Chong Chen, Xuezhuan Yi Xuezhuan Yi, Yanru Tang Yanru Tang, Shuai Zhang Shuai Zhang, Ting Yu Ting Yu, Wei Chen Wei Chen e Shengming Zhou Shengming Zhou. "Fabrication of transparent Tb3Ga5O12 ceramic". Chinese Optics Letters 13, n. 3 (2015): 031602–31605. http://dx.doi.org/10.3788/col201513.031602.

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Ramsai, J., S. Sai Krishna e Sk Basheer. "Fabrication of Flyash E-Blocks". International Journal of Research Publication and Reviews 4, n. 4 (aprile 2023): 3755–59. http://dx.doi.org/10.55248/gengpi.4.423.37396.

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44

Kasetsirikul, Surasak, Kimberley Clack, Muhammad J. A. Shiddiky e Nam-Trung Nguyen. "Rapid, Simple and Inexpensive Fabrication of Paper-Based Analytical Devices by Parafilm® Hot Pressing". Micromachines 13, n. 1 (29 dicembre 2021): 48. http://dx.doi.org/10.3390/mi13010048.

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Abstract (sommario):

Paper-based analytical devices have been substantially developed in recent decades. Many fabrication techniques for paper-based analytical devices have been demonstrated and reported. Herein, we report a relatively rapid, simple, and inexpensive method for fabricating paper-based analytical devices using parafilm hot pressing. We studied and optimized the effect of the key fabrication parameters, namely pressure, temperature, and pressing time. We discerned the optimal conditions, including a pressure of 3.8 MPa, temperature of 80 °C, and 3 min of pressing time, with the smallest hydrophobic barrier size (821 µm) being governed by laminate mask and parafilm dispersal from pressure and heat. Physical and biochemical properties were evaluated to substantiate the paper functionality for analytical devices. The wicking speed in the fabricated paper strips was slightly lower than that of non-processed paper, resulting from a reduced paper pore size after hot pressing. A colorimetric immunological assay was performed to demonstrate the protein binding capacity of the paper-based device after exposure to pressure and heat from the fabrication. Moreover, mixing in a two-dimensional paper-based device and flowing in a three-dimensional counterpart were thoroughly investigated, demonstrating that the paper devices from this fabrication process are potentially applicable as analytical devices for biomolecule detection. Fast, easy, and inexpensive parafilm hot press fabrication presents an opportunity for researchers to develop paper-based analytical devices in resource-limited environments.

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Gutierrez, Cassie, Rudy Salas, Gustavo Hernandez, Dan Muse, Richard Olivas, Eric MacDonald, Michael D. Irwin et al. "CubeSat Fabrication through Additive Manufacturing and Micro-Dispensing". International Symposium on Microelectronics 2011, n. 1 (1 gennaio 2011): 001021–27. http://dx.doi.org/10.4071/isom-2011-tha4-paper3.

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Abstract (sommario):

Fabricating entire systems with both electrical and mechanical content through on-demand 3D printing is the future for high value manufacturing. In this new paradigm, conformal and complex shapes with a diversity of materials in spatial gradients can be built layer-by-layer using hybrid Additive Manufacturing (AM). A design can be conceived in Computer Aided Design (CAD) and printed on-demand. This new integrated approach enables the fabrication of sophisticated electronics in mechanical structures by avoiding the restrictions of traditional fabrication techniques, which result in stiff, two dimensional printed circuit boards (PCB) fabricated using many disparate and wasteful processes. The integration of Additive Manufacturing (AM) combined with Direct Print (DP) micro-dispensing and robotic pick-and-place for component placement can 1) provide the capability to print-on-demand fabrication, 2) enable the use of micron-resolution cavities for press fitting electronic components and 3) integrate conductive traces for electrical interconnect between components. The fabrication freedom introduced by AM techniques such as stereolithography (SL), ultrasonic consolidation (UC), and fused deposition modeling (FDM) have only recently been explored in the context of electronics integration and 3D packaging. This paper describes a process that provides a novel approach for the fabrication of stiff conformal structures with integrated electronics and describes a prototype demonstration: a volumetrically-efficient sensor and microcontroller subsystem scheduled to launch in a CubeSat designed with the CubeFlow methodology.

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Xu, Chenxi, Chen Zhang, Wei Zhao, Yining Liu, Ziyu Li, Zeyu Wang, Baole Lu, Kaige Wang e Jintao Bai. "Fabrication of Micro/Nano Dual Needle Structures with Morphological Gradient Based on Two-Photon Polymerization Laser Direct Writing with Proactive Focus Compensation". Photonics 11, n. 2 (18 febbraio 2024): 187. http://dx.doi.org/10.3390/photonics11020187.

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Micro/nano structures with morphological gradients possess unique physical properties and significant applications in various research domains. This study proposes a straightforward and precise method for fabricating micro/nano structures with morphological gradients utilizing single-voxel synchronous control and a nano-piezoelectric translation stage in a two-photon laser direct writing technique. To address the defocusing issue in large-scale fabrication, a methodology for laser focus dynamic proactive compensation was developed based on fluorescence image analysis, which can achieve high-precision compensation of laser focus within the entire range of the nano-piezoelectric translation stage. Subsequently, the fabrication of micro/nano dual needle structures with morphological gradients were implemented by employing different writing speeds and voxel positions. The minimum height of the tip in the dual needle structure is 80 nm, with a linewidth of 171 nm, and a dual needle total length reaching 200 μm. Based on SEM (scanning electron microscope) and AFM (atomic force microscope) characterization, the dual needle structures fabricated by the method proposed in this study exhibit high symmetry and nanoscale gradient accuracy. Additionally, the fabrication of hexagonal lattice periodic structures assembled from morphological gradient needle structures and the size gradient Archimedean spiral structures validate the capability of the single voxel-based fabrication and proactive focus compensation method for complex gradient structure fabrication.

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Wang, Houxiao, Wei Zhou e Er Ping Li. "Focused Ion Beam Assisted Interface Detection for Fabricating Functional Plasmonic Nanostructures". Journal of Nanomaterials 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/468069.

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Abstract (sommario):

Plasmonic nanoscale devices/structures have gained more attention from researchers due to their promising functions and/or applications. One important technical focus on this rapidly growing optical device technology is how to precisely control and fabricate nanostructures for different functions or applications (i.e., patterning end points should locate at/near the interface while fabricating these plasmonic nanostructures), which needs a systematic methodology for nanoscale machining, patterning, and fabrication when using the versatile nanoprecision tool focused ion beam (FIB), that is, the FIB-assisted interface detection for fabricating functional plasmonic nanostructures. Accordingly, in this work, the FIB-assisted interface detection was proposed and then successfully carried out using the sample-absorbed current as the detection signal, and the real-time patterning depth control for plasmonic structure fabrication was achieved via controlling machining time. Besides, quantitative models for the sample-absorbed currents and the ion beam current were also established. In addition, some nanostructures for localized surface plasmon resonance biosensing applications were developed based on the proposed interface detection methodology for FIB nanofabrication of functional plasmonic nanostructures. It was shown that the achieved methodology can be conveniently used for real-time control and precise fabrication of different functional plasmonic nanostructures with different geometries and dimensions.

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Yahya, Sufiah Mohamad, A. Azmi, Maizlinda Izwana Idris, Muhamad Zaini Yunos, Shahruddin Mahzan, Sufizar Ahmad e Hariati Taib. "Short Review: Role of Metal Oxides as Filler in Polysiloxane Sheet Composite". Applied Mechanics and Materials 465-466 (dicembre 2013): 27–31. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.27.

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Abstract (sommario):

Additional of fillers such as silica (SiO2), alumina (Al2O3), zinc oxide (ZnO), Zirconium carbide ( ZrC) and Zirconia (ZrO2) would affect the properties of the polysiloxane sheet, that can be applied in various applications. Polysiloxane sheet composites are largely use today with various materials as fillers. The fabrication techniques of the polysiloxane composite sheets include micro-moulding, casting moulding and injection moulding. Application of different fabricating process, physical and mechanical properties of polysiloxane sheet composites. Thus, this paper complies various studies with regards to the various properties of polysiloxane sheet composites established by incorporation of different fabrication technique and fillers.

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Kim, Hyoun Woo. "Plasma Etching for Fabricating the Concave-Type DRAM Capacitors". Materials Science Forum 449-452 (marzo 2004): 353–56. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.353.

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The usage of barium strontium titanate (BST) capacitor have recently been considered in the fabrication of dynamic random access memory (DRAM) device. In this study, in order to avoid the difficulties of high aspect ratio etching of bottom electrode in the conventional stack-typecapacitor structure, we suggest to introduce a concave-type capacitor structure. The fabrication procedure of the two kinds of the concave capacitor cells, Pt/BST/Pt and Ru/BST/Ru are explained. We have studied on the metal electrode etching in the concave structure and have discussed the patterning issues in fabricating the capacitor structures.

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Wen, Liaoyong, HuaPing Zhao, Fabian Grote e Yong Lei. "Template-Based Surface Nano-Patterning and Device Applications". Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (1 settembre 2012): 000123–31. http://dx.doi.org/10.4071/cicmt-2012-tp25.

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Surface nano-patterns on substrates are the fundamental structures of various nano-devices. Template-based surface nano-patterning techniques are highly efficient methods in realizing different surface nano-patterns. The time-saving and low-cost fabrication processes of the UTAM (ultra-thin alumina membranes) template-based surface patterning are highly desirable for industry in fabricating different kinds of nano-devices. This manuscript summarizes the recent advancements in the field of UTAM template based surface nano-patterning, the basic concepts, the general fabrication processes, the structure-related properties, and the device applications of these template-based surface nano-patterning techniques are introduced.

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