Heterogeneous microoptical structures with sub-micrometer precision

Steenhusen, Sönke; Burmeister, Frank; Groß, Matteo; Domann, Gerhard; Houbertz, R.; Nolte, Stefan

doi:10.1016/j.tsf.2018.09.013

Cited by 12 publications

(7 citation statements)

References 23 publications

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“…The energy of the photons is insufficient to cause polymerization individually, so complete excitation only occurs in a narrow focal point, where two photons excite the resin in quick succession. This produces microscale structures with nanoscale voxels with a length scale as small as 100 nm 372,373…”

Section: Optical Patterningmentioning

confidence: 99%

Nanomaterial Patterning in 3D Printing

et al. 2020

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The synergistic integration of nanomaterials with 3D printing technologies can enable the creation of architecture and devices with an unprecedented level of functional integration. In particular, a multiscale 3D printing approach can seamlessly interweave nanomaterials with diverse classes of materials to impart, program, or modulate a wide range of functional properties in an otherwise passive 3D printed object. However, achieving such multiscale integration is challenging as it requires the ability to pattern, organize, or assemble nanomaterials in a 3D printing process. This review highlights the latest advances in the integration of nanomaterials with 3D printing, achieved by leveraging mechanical, electrical, magnetic, optical, or thermal phenomena. Ultimately, it is envisioned that such approaches can enable the creation of multifunctional constructs and devices that cannot be fabricated with conventional manufacturing approaches.

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Section: Optical Patterningmentioning

confidence: 99%

Nanomaterial Patterning in 3D Printing

et al. 2020

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“…[247] Interestingly, OXE-02 displayed an outstandingly high sensitivity in resins containing black pigments so that OXE-02 was immediately commercialized by the color filter resist manufacturers. [248][249][250][251][252][253] Noticeably, only one initiating and reactive species is formed by photodecomposition of OXE-02. Indeed, iminyl radicals formed in first step cannot undergo a further fragmentation, furnishing radicals unable to add onto acrylic double bonds.…”

Section: Carbazole-benzophenone Hybrid Oxime Estersmentioning

confidence: 99%

Recent advances on carbazole-based oxime esters as photoinitiators of polymerization

Dumur

2022

European Polymer Journal

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“…[33] All these features commonly rely on patterned mesoscopic arrays and membrane-like thin films of photonically active, nanostructured materials in free-form shape. Scalable pattern fabrication techniques see colloidal heteroepitaxy [34] as a subtractive "gold standard" for micro-optical components; additive methods include two-photon polymerization, [35][36][37] spray deposition [38] or colloidal deposition from the liquid phase. [4,25,[39][40][41][42] In particular, for colloidal nanospheres, vertical deposition, [4,25] convective self-assembly, [39] or multilayer colloidal nanoparticle floating, [40][41][42] have been realized.…”

Section: Motivationmentioning

confidence: 99%

Disorder explains dual‐band reflection spectrum in spherical colloidal photonic supraparticle assemblies

et al. 2021

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Spherical colloidal photonic supraparticle systems or assemblies (SCAs) are investigated as a model system for confined optical and photonic components. Simulations of the reflection spectrum to calculate their photonic and optical properties for different parameter constellations are compared with experimental studies by microreflectance spectroscopy (𝜇RS) on SCAs fabricated by inkjet in-flight deposition, proving the existence of a dual-band reflection spectrum originating from the supraparticle system. Finite-difference time-domain (FDTD) calculations are employed to verify these findings as a function of structural parameters. Both, theory and experiment, show a double reflection peak for the SCAs and agree well in the variation of position and shape, scaling clearly with the packing density of the SCAs. Reducing this parameter from 0.6 to 0.3, the higher-wavelength reflection maximum decreases in intensity and increases in width but keeps its spectral position. The lower-wavelength reflection maximum decreases in intensity, increases in width and shows a red shift. The results clearly indicate that aspects of disorder decisively contribute to the particular spectral photonic properties of the supraparticle system which are usually related to order in photonic crystals. This finding can stipulate novel, tailor-made nanostructured optical components such as low-dimensional micro resonators and waveguides.

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Heterogeneous microoptical structures with sub-micrometer precision

Cited by 12 publications

References 23 publications

Nanomaterial Patterning in 3D Printing

Nanomaterial Patterning in 3D Printing

Recent advances on carbazole-based oxime esters as photoinitiators of polymerization

Disorder explains dual‐band reflection spectrum in spherical colloidal photonic supraparticle assemblies

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