2002
DOI: 10.1002/1521-4095(20020916)14:18<1279::aid-adma1279>3.0.co;2-a
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Directed Colloidal Assembly of 3D Periodic Structures

Abstract: Colloidal inks, comprised of silica microspheres with tailored attractive interactions between them, have been directly assembled via a robotically controlled deposition technique. 3D periodic lattices, whose periodicity far exceeds the dimensions of the colloidal building blocks (see Figure for a cross‐sectional image), were created through layer‐ by‐layer patterning of parallel rods.

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Cited by 348 publications
(279 citation statements)
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“…The colloidal inks for robocasting should accomplish two key conditions [10,17,18]: shear thinning rheological behavior to enable extrusion through fi ne deposition nozzles with rapid recovery of yield stress after deposition, and high solids loadings to limit shrinkage and stress upon drying. As the surface of SiC, Al 2 O 3 and Y 2 O 3 particles must be covered with dispersant molecules, which govern the surface characteristics, in order to get similar zeta potential behavior for the three components, the spacing); a pre-shearing of 1 s -1 for a period of 60 s and a following equilibration (zero shear rate rest) time of 100 s were carried out before each test.…”
Section: Resultsmentioning
confidence: 99%
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“…The colloidal inks for robocasting should accomplish two key conditions [10,17,18]: shear thinning rheological behavior to enable extrusion through fi ne deposition nozzles with rapid recovery of yield stress after deposition, and high solids loadings to limit shrinkage and stress upon drying. As the surface of SiC, Al 2 O 3 and Y 2 O 3 particles must be covered with dispersant molecules, which govern the surface characteristics, in order to get similar zeta potential behavior for the three components, the spacing); a pre-shearing of 1 s -1 for a period of 60 s and a following equilibration (zero shear rate rest) time of 100 s were carried out before each test.…”
Section: Resultsmentioning
confidence: 99%
“…The retention of shape by the formed fi laments is basically accomplished by a precise control over the ink viscosity, employing high solids loadings for minimizing the shrinkage during the drying process and, thus, preventing cracking phenomena. In this way, robocasting has been proved suitable for many ceramics such as silica [17], alumina [18], tricalcium phosphate [19] or hydroxyapatite [20], all of which can be easily densifi ed in conventional furnaces in air atmospheres. Furthermore, the challenge of fabricating non-oxide ceramic scaffolds by robocasting has already been demonstrated [21], employing SiC inks containing submicronic SiC powders and 20 wt.…”
Section: Diseño Microestructural De Andamiajes Cerámicos De Sic Sintementioning
confidence: 99%
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“…These methods were utilized previously for the controlled gelation of alumina, barium titanate, and lead zirconate titanate suspensions [6,[24][25][26][27][28]34]. In the first method, inks were prepared by adding poly(ethylene imine) (PEI) to the system.…”
Section: Pmn Gel Preparationmentioning
confidence: 99%
“…It is a solid free form fabrication method that utilizes colloidal systems of low organic content [21][22][23]. Previously, Lewis and co-workers conducted intensive research on the robocasting of alumina [24], barium titanate [25] and lead zirconate titanate [26][27][28] powders and produced different geometries to be used in different applications [21].…”
Section: Introductionmentioning
confidence: 99%