Printing mesoscale architectures

Raney, Jordan R.; Lewis, Jennifer A.

doi:10.1557/mrs.2015.235

Cited by 103 publications

(81 citation statements)

References 81 publications

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“…Experimentally, recent advances in digital fabrication have enabled manufacturing of systems with arbitrary shapes across length scales and made out of a wide ranges of materials, facilitating the exploration of the design space [175]. On the computational side, to reduce the time and make sure the behavior of the systems is not dominated by boundary effects, most of the studies have focused on infinite periodic systems, considering unit cells with appropriate boundary conditions.…”

Section: Instability-driven Pattern Formationmentioning

confidence: 99%

Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

Kochmann

Bertoldi

2017

Applied Mechanics Reviews

181

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Instabilities in solids and structures are ubiquitous across all length and time scales, and engineering design principles have commonly aimed at preventing instability. However, over the past two decades, engineering mechanics has undergone a paradigm shift, away from avoiding instability and toward taking advantage thereof. At the core of all instabilities-both at the microstructural scale in materials and at the macroscopic, structural level-lies a nonconvex potential energy landscape which is responsible, e.g., for phase transitions and domain switching, localization, pattern formation, or structural buckling and snapping. Deliberately driving a system close to, into, and beyond the unstable regime has been exploited to create new materials systems with superior, interesting, or extreme physical properties. Here, we review the state-of-the-art in utilizing mechanical instabilities in solids and structures at the microstructural level in order to control macroscopic (meta)material performance. After a brief theoretical review, we discuss examples of utilizing material instabilities (from phase transitions and ferroelectric switching to extreme composites) as well as examples of exploiting structural instabilities in acoustic and mechanical metamaterials.

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Section: Instability-driven Pattern Formationmentioning

confidence: 99%

Exploiting Microstructural Instabilities in Solids and Structures: From Metamaterials to Structural Transitions

Kochmann

Bertoldi

2017

Applied Mechanics Reviews

181

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“…3D printing is commonly associated with either light-based or ink-based printing techniques [47]. Light-based techniques are founded on processes such as UV curing [43,48,49] and two-photon polymerization [50].…”

Section: D Printing For Multiscale Manufacturingmentioning

confidence: 99%

“…Ink-based printing can be achieved via extrusion printing, inkjet printing [51], and electro-hydrodynamic printing [52]. Extrusion-based 3D printing is a particularly interesting subset of additive manufacturing in which the materials are extruded through a nozzle [47,53–57]. Such a platform is highly versatile, affordable [58] and can be readily expanded to incorporate multiple materials [59–61].…”

Section: D Printing For Multiscale Manufacturingmentioning

confidence: 99%

“…Moreover, in contrast to other printing methods, such as inkjet printing (where the typical viscosity is limited to ca. 2–10 2 mPa·s [51]), extrusion-based 3D printing is capable of incorporating a wide range of materials with viscosities up to 10 6 mPa·s and with disparate properties [47,61]. This versatility has enabled the accommodation of different classes of materials encompassing a wide range of length-scales: including nanomaterials [61,62], fibers [63], cells [64,65], tissues [66], organs [55,67], ceramics [68,69], metals [70] and polymers such as elastomers [59,60,71], gels [72,73], and biomaterials [55,74].…”

Section: D Printing For Multiscale Manufacturingmentioning

confidence: 99%

“…The primary challenge in developing fully 3D printable active electronic devices such as diodes and transistors [197] lies in the complications associated with the integration of diverse classes of materials exhibiting disparate properties [47]. For instance, the 3D printing of LEDs requires the integration of a printable substrate, an emission layer, charge transport layers, a cathode, an anode and interconnects, all of which could consist of metal, semiconductor and polymeric materials, with varying surface energies, viscosities, and tribological and mechanical properties [61].…”

Section: D Printed Active Semiconducting Electronicsmentioning

confidence: 99%

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3D printed bionic nanodevices

et al. 2016

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Summary The ability to three-dimensionally interweave biological and functional materials could enable the creation of bionic devices possessing unique and compelling geometries, properties, and functionalities. Indeed, interfacing high performance active devices with biology could impact a variety of fields, including regenerative bioelectronic medicines, smart prosthetics, medical robotics, and human-machine interfaces. Biology, from the molecular scale of DNA and proteins, to the macroscopic scale of tissues and organs, is three-dimensional, often soft and stretchable, and temperature sensitive. This renders most biological platforms incompatible with the fabrication and materials processing methods that have been developed and optimized for functional electronics, which are typically planar, rigid and brittle. A number of strategies have been developed to overcome these dichotomies. One particularly novel approach is the use of extrusion-based multi-material 3D printing, which is an additive manufacturing technology that offers a freeform fabrication strategy. This approach addresses the dichotomies presented above by (1) using 3D printing and imaging for customized, hierarchical, and interwoven device architectures; (2) employing nanotechnology as an enabling route for introducing high performance materials, with the potential for exhibiting properties not found in the bulk; and (3) 3D printing a range of soft and nanoscale materials to enable the integration of a diverse palette of high quality functional nanomaterials with biology. Further, 3D printing is a multi-scale platform, allowing for the incorporation of functional nanoscale inks, the printing of microscale features, and ultimately the creation of macroscale devices. This blending of 3D printing, novel nanomaterial properties, and ‘living’ platforms may enable next-generation bionic systems. In this review, we highlight this synergistic integration of the unique properties of nanomaterials with the versatility of extrusion-based 3D printing technologies to interweave nanomaterials and fabricate novel bionic devices.

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