Stereolithographic Processes

Bártolo, Paulo

doi:10.1007/978-0-387-92904-0_1

Cited by 107 publications

(146 citation statements)

References 130 publications

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“…Some SLA printers employ a top-down approach, in which the build plate is above the vat of resin and increases in height after each layer is cured [45], while others employ a bottomup approach in which the build plate is in the resin and moves down after each layer is cured to expose the next layer of resin. The structure is generated from a 3D mesh of triangular elements [47]; the tolerances are specific to the printer used, but the layers are generally 0.05-0.15 mm thick in the z-direction, with accuracies of 0.01-0.02 mm in the xy-plane [48]. Because of the layer-by-layer addition and specific laser raster pattern, smooth surfaces with highly detailed features may be obtained.…”

Section: Vat Photopolymerizationmentioning

confidence: 99%

Printable Materials for the Realization of High Performance RF Components: Challenges and Opportunities

Rosker

Sandhu

Hester

et al. 2018

International Journal of Antennas and Propagation

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Printing methods such as additive manufacturing (AM) and direct writing (DW) for radio frequency (RF) components including antennas, filters, transmission lines, and interconnects have recently garnered much attention due to the ease of use, efficiency, and low-cost benefits of the AM/DW tools readily available. The quality and performance of these printed components often do not align with their simulated counterparts due to losses associated with the base materials, surface roughness, and print resolution. These drawbacks preclude the community from realizing printed low loss RF components comparable to those fabricated with traditional subtractive manufacturing techniques. This review discusses the challenges facing low loss RF components, which has mostly been material limited by the robustness of the metal and the availability of AM-compatible dielectrics. We summarize the effective printing methods, review ink formulation, and the postprint processing steps necessary for targeted RF properties. We then detail the structure-property relationships critical to obtaining enhanced conductivities necessary for printed RF passive components. Finally, we give examples of demonstrations for various types of printed RF components and provide an outlook on future areas of research that will require multidisciplinary teams from chemists to RF system designers to fully realize the potential for printed RF components.

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Section: Vat Photopolymerizationmentioning

confidence: 99%

Printable Materials for the Realization of High Performance RF Components: Challenges and Opportunities

Rosker

Sandhu

Hester

et al. 2018

International Journal of Antennas and Propagation

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“…Alternatively, a photosensitive cell-rich resin may be used to fill the defect, following which state-of-the-art laser-based techniques such as two-photon polymerization (2PP) are applied to selectively solidify the resin into desired biomimetic structures with feature sizes of microns. Two-photon polymerization allows for fast construction of structures with submicron (hundreds of nanometers) spatial resolution by using focused femtosecond near-infrared lasers (~800 nm wavelength) [21,22] . The limitation of current 2PP technique in bioprinting practice is that it only allows mono-material resins to be used, which hinders its application in the integral fabrication of heterocellular and multi-material tissues/organs.…”

Section: Bioprinting Techniquesmentioning

confidence: 99%

The trend towards in vivo bioprinting

Wang¹,

He²,

Liu³

et al. 2024

IJB

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Bioprinting is one of several newly emerged tissue engineering strategies that hold great promise in alleviating of organ shortage crisis. To date, a range of living biological constructs have already been fabricated in vitro using this technology. However, an in vitro approach may have several intrinsic limitations regarding its clinical applicability in some cases. A possible solution is in vivo bioprinting, in which the de novo tissues/organs are to be directly fabricated and positioned at the damaged site in the living body. This strategy would be particularly effective in the treatment of tissues/organs that can be safely arrested and immobilized during bioprinting. Proof-of-concept studies on in vivo bioprinting have been reported recently, on the basis of which this paper reviews the current state-of-the-art bioprinting technologies with a particular focus on their advantages and challenges for the in vivo application.

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“…[49] Stereolithographic processes rely on light to polymerize photosensitive resins from liquid states to gelled solid states. [50] This process is particularly amenable to fabrication with hydrogels, as light-initiated polymerization of such materials is well characterized and understood.…”

Section: D Printing Apparatus For Biofabricationmentioning

confidence: 99%

Biomimicry, Biofabrication, and Biohybrid Systems: The Emergence and Evolution of Biological Design

Raman

Bashir

2017

Adv Healthcare Materials

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how the concept of bioinspiration, or imitating biological design and functionality in synthetic materials, created a new class of "smart" biomimetic materials. Then, we shall discuss how the continuing development of enabling manufacturing technologies, such as 3D printing and microfluidics, has established the separate subdiscipline of biofabrication for tissue engineering, or "building with biology." Finally, we shall investigate the convergence of these two fields into the emerging discipline of biohybrid design, the use of biological materials to power non-natural functional behaviors in synthetic machines. Throughout this report, we will revisit a single class of materials, hydrogels, as a case study of biological design in the context of each subfield, and discuss how the constraints, underlying principles, and end-use applications differ in each case. We will also discuss ethical considerations of biological design, with a special focus on forward engineering non-natural or hypernatural functional behaviors in biohybrid systems. We will conclude with recommendations for implementing biological design into educational curricula, ensuring effective and responsible practices for the next generation of engineers and scientists. Biomimicry and Bioinspired DesignA deeper understanding of the underlying design principles that govern biological systems has inspired the field of biomimicry. [1,2] Observing adaptive phenomena in nature, scientists and engineers have sought to extract the components of biological design responsible for this behavior and replicate the behavior in synthetic materials. Fundamentally, this involves understanding the building blocks or base units from which a biological material is built, the hierarchical assembly of these building blocks, and the interactions and interfaces between them.In this section, we will discuss strategies that engineers and scientists have employed to engineer bioinspired hierarchy, from bottom-up self-assembly and top-down engineered assembly. We will present several key demonstrations of stimulus-responsive hydrogels ranging from the micro-to the macroscale, and investigate novel demonstrations in biomimetic actuation and movement. We will conclude with the remaining challenges in the field of biomimicry and discuss the potential future impact of bioinspired design.The discipline of biological design has a relatively short history, but has undergone very rapid expansion and development over that time. This Progress Report outlines the evolution of this field from biomimicry to biofabrication to biohybrid systems' design, showcasing how each subfield incorporates bioinspired dynamic adaptation into engineered systems. Ethical implications of biological design are discussed, with an emphasis on establishing responsible practices for engineering non-natural or hypernatural functional behaviors in biohybrid systems. This report concludes with recommendations for implementing biological design into educational curricula, ensuring effective and responsible practice...

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Stereolithographic Processes

Cited by 107 publications

References 130 publications

Printable Materials for the Realization of High Performance RF Components: Challenges and Opportunities

Printable Materials for the Realization of High Performance RF Components: Challenges and Opportunities

The trend towards in vivo bioprinting

Biomimicry, Biofabrication, and Biohybrid Systems: The Emergence and Evolution of Biological Design

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