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Showing 1 to 16 of 16 for “"direct-write assembly"”.
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Direct-write assembly of colloidal materials
Colloidal assembly, which is the spontaneous organization of nano- and micro- sized particles, is an attractive means to create materials with properties that can be engineered via hierarchy of particle composition, size, ordering, and macroscopic form. However, while there are well-established …
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Direct-write assembly of 3D microperiodic scaffolds for tissue engineering applications
… microperiodic scaffolds have been fabricated by direct-write assembly for tissue engineering. Such scaffolds are necessary to accurately mimic the complex environment of real tissues. Three distinct inks have been developed: (1) a hydrogel ink that contains high molecular weigh chains of …
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Biphasic Nanoparticle Inks for Direct Write Assembly of Three-Dimensional Periodic Structures
Novel nanoparticle inks have been created for the direct-write assembly of 3-D periodic structures with fine scale (∼ 10 mum) features. These nanoparticle inks are composed of two populations of nanoparticles defined by the type of dispersant used to stabilize them, either poly(acrylic …
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Colloidal and Polyelectrolyte Inks for Direct -Write Assembly of 3D Periodic Structures
"Novel inks were developed for the direct-write assembly of 3D periodic structures with varying feature size. Specifically, two ink designs were pursued: (1) a model colloidal ink (feature size > 100 mum) and (2) a polyelectrolyte ink (feature size ∼ 1 mum). The rheological properties of both …
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Freeform, direct-write assembly of thermoplastics and glasses: Theory, practice, and applications
… subset of additive manufacturing, broadly termed direct-write assembly, in which material is deposited through a translating nozzle onto a curved surface, across spanning gaps, into a fluid reservoir, or in free space. The latter approach, referred to here as freeform assembly, is particularly …
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Direct-Write Assembly of Three-Dimensional Polyelectrolyte Scaffolds, Inorganic Hybrids, and Photonic Crystals
… 3D microperiodic polymer scaffolds assembled by direct ink writing. First, polymer woodpiles with a face-centered tetragonal geometry are fabricated by direct ink writing. Chemical vapor depositions of silica and germanium are then performed under controlled conditions to produce optimal layer …
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Nanoparticle and Sol -Gel Inks for Direct -Write Assembly of Functional Metallic and Metal Oxide Materials
… of low-power, gas sensor devices based upon direct-write assembled TiO2 microwire arrays.
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Comb Polymer Architecture and Particle Size Effects on the Behavior of Biphasic Nanoparticle Inks for Direct -Write Assembly
… optimizing the composition of biphasic inks for direct-write assembly of fine-scale, 3D structures.
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Structure, Dynamics, and Flow Behavior of Model Biphasic Colloidal Mixtures
… ceramic components, novel coatings, inks for direct-write assembly, and drug delivery.
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Manipulating soft materials to direct cell growth in multiple dimensions
… soft lithography, microfluidic devices and direct-write assembly can be used to create such microenvironments. Soft lithography techniques, which typically include microcontact printing and decal transfer, rely on elastomeric molds, stamps or flexible photomasks to create patterns on or …
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Self-healing materials and multinozzle printheads with embedded microvascular networks
… with interpenetrating microvascular networks via direct-write assembly of fugitive organic inks, (2) design systems with controlled thermal regulation and investigate their self-healing behavior, and (3) produce multinozzle printheads composed of biomimetic microvascular networks for …
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Core-shell printing of functional polymer filaments
Direct-write assembly is a filamentary fabrication technique capable of producing functional microstructures with a variety of materials, sizes, and morphologies. In essence, ink materials are extruded continuously from a printhead while the printhead is translated on a 3D positioning stage at a …
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Direct ink writing of microvascular networks
… important. In this PhD thesis, the direct-write assembly of planar and 3D biomimetic microvascular networks within polymer and hydrogel matrices is demonstrated. In addition, the influence of network design of fluid transport efficiency is characterized. Planar microvascular networks …
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3D printing of hyaluronic acid scaffolds for tissue engineering applications
Direct-write assembly is used to fabricate 3D microperiodic scaffolds composed of hyaluronic acid (HA), a natural, biocompatible, biodegradeable polymer, for cell culture and tissue engineering applications. HA is functionalized with UV-curable glycidyl methacrylate (GM) and printed to create 3D …
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Synthesis and patterning of reactive silver inks
… tension (63 mN/m). It can be patterned by direct-write assembly using nozzles as small as 100 nm to create features with line widths of approximately 5 μm. In addition, it can be deposited conformally over large areas using aerosol spray deposition. The patterned features exhibit an …
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Microvascular materials for adaptive electronic structures
… in a structural epoxy are fabricated by direct-write assembly of a fugitive ink. One antenna is a cavity-backed substrate integrated waveguide (SIW) slot which is able to switch polarization states. Displacement of EGaIn surrounded by a non-conductive fluid in a serpentine channel results …