Multi-material microstereolithography

Choi, Jae Won; MacDonald, Eric; Wicker, Ryan B.

doi:10.1007/s00170-009-2434-8

Cited by 115 publications

(84 citation statements)

References 22 publications

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“…It provides the ability to arbitrarily place different materials in three dimensions with high precision [61,62]. 3D printing is already well established for producing rapid prototypes, but recent advances in equipment and materials have made it viable for producing functional devices and even final products [63][64][65][66][67][68][69]. The device presented here was printed from the STL file using fused deposition modeling (FDM) in a Stratasys FDM 400 mc.…”

Section: Resultsmentioning

confidence: 99%

3d Printed Lattices With Spatially Variant Self-Collimation

Rumpf¹,

Pazos²,

Garcia³

et al. 2013

PIER

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Abstract-In this work, results are given for controlling waves arbitrarily inside a lattice with spatially variant self-collimation. To demonstrate the concept, an unguided beam was made to flow around a 90 • bend without scattering due to the bend or the spatial variance. Control of the field was achieved by spatially varying the orientation of the unit cells throughout a self-collimating photonic crystal, but in a manner that almost completely eliminated deformations to the size and shape of the unit cells. The device was all-dielectric, monolithic, and made from an ordinary dielectric with low relative permittivity (ε r = 2.45). It was manufactured by fused deposition modeling, a form of 3D printing, and its performance confirmed experimentally at around 15 GHz.

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Section: Resultsmentioning

confidence: 99%

3d Printed Lattices With Spatially Variant Self-Collimation

Rumpf¹,

Pazos²,

Garcia³

et al. 2013

PIER

Self Cite

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“…In the present work, a deep-dip coating process in combination with low viscosity resins was used to remove the need for sweeping. This approach has been successfully used in previous work (Choi et al, 2006(Choi et al, , 2009a(Choi et al, , 2010. There are clearly benefits, however, with sweeping, and thus, current efforts are focused on developing integrated contact (similar to the current approach used in SL) and non-contact (for use when material obstructions from previously fabricated layers are present) sweeping approaches for the MMSL technology.…”

Section: Materials Preparationmentioning

confidence: 92%

“…This system and the developments required to build multi-material parts using MMSL technology are the focus of this paper. During these developments, the MMSL concepts have included fabricating multi-material tissue engineered implants (Arcaute et al, 2007(Arcaute et al, , 2010 and multi-material microscale parts using micro-SL technology (Choi et al, 2010). In addition to system development, a process planning and scheduling algorithm for MMSL fabrication has been developed as described in Kim et al (2010a,b).…”

Section: Introductionmentioning

confidence: 99%

Multi-material stereolithography

Choi

Kim

Wicker

2011

Journal of Materials Processing Technology

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246

145

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a b s t r a c tA multi-material stereolithography (MMSL) machine was developed by retrofitting components from a commercial 3D Systems 250/50 stereolithography (SL) machine on a separate stand-alone system and adapting the components to function with additional components required for MMSL operation. The MMSL machine required construction of a new frame and the development of a new rotating vat carousel system, platform assembly, and automatic leveling system. The overall operation of the MMSL system was managed using a custom LabVIEW ® program, which included controlling a new vat leveling system and new linear and rotational stages, while the commercial SL control software (3D Systems Buildstation 4.0) was retained for controlling the laser scanning process. During MMSL construction, the sweeping process can be inhibited by previously cured layers, and thus, a deep-dip coating process without sweeping was used with low viscosity resins. Low viscosity resins were created by diluting commercial resins, including DSM Somos ® WaterShed TM 11120, ProtoTherm TM 12120, and 14120 White, with propoxylated (2) neopentyl glycol diacrylate (PNGD). Several multi-material complex parts were produced providing compelling evidence that MMSL can produce unique parts that are functional, visually illustrative, and constructed with multi-materials.

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“…Recently, there have been numerous studies regarding the manufacturing of nanosized metal particles on nanoink applications [1][2][3][4]. Metal inks containing nanoparticles can be used in the fabrication of a variety of printed electronics [5][6][7], such as flexible antennas [5], displays [8], and printed circuit boards [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Lithium Ions on Copper Nanoparticle Size, Shape, and Distribution

Jang

Ortega

Ucol

et al. 2012

Journal of Nanotechnology

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Copper nanoparticles were synthesized using lithium ions to increase the aqueous electrical conductivity of the solution and precisely control the size, shape, and size distribution of the particles. In this study, the conventional approach of increasing particle size by the concentration of copper ions and PGPPE in a copper chloride solution was compared to increasing the concentration of lithium chloride when the copper chloride concentration was held constant. Particle size and shape were characterized by TEM, and the size distribution of the particles at different concentrations was obtained by particle size analysis. Increasing the concentration of copper ion in the solution greatly increased the aqueous electric conductivity and the size of the particles but led to a wide size distribution ranging from 150 nm to 400 nm and rough particle morphology. The addition of lithium ions increased the size of the particles, but maintains them in a range of 250 nm. In addition the particles exhibited spherical shape as determined by TEM. The addition of lithium ions to the solution has the potential to synthesize nanoparticles with optimal characteristics for printing applications by maintaining a narrow size range and spherical shape.

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Multi-material microstereolithography

Cited by 115 publications

References 22 publications

3d Printed Lattices With Spatially Variant Self-Collimation

3d Printed Lattices With Spatially Variant Self-Collimation

Multi-material stereolithography

Effect of Lithium Ions on Copper Nanoparticle Size, Shape, and Distribution

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