Chemical Aspects of Three-Dimensional Photonic Crystals

Moon, Jun Hyuk; Yang, Shu

doi:10.1021/cr900080v

Cited by 250 publications

(205 citation statements)

References 269 publications

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“…A key advance over previous work is the replacement of conventional 3D resists (e.q. SU-8, Microchem) 13 , which require harsh removal conditions such as high-temperature burning ( ~ 500 ° C) or plasma etching 14 , with a positive-tone resist (AZ 9260, Clariant). Th e positive-tone resist can be easily removed by buff ered aqueous solution of KOH aft er infi ltration of PDMS, without causing damage to the 3D nano-architecture.…”

Section: Fabrication Of 3d Pdmsmentioning

confidence: 99%

Three-dimensional nanonetworks for giant stretchability in dielectrics and conductors

et al. 2012

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The realization of levels of stretchability that extend beyond intrinsic limits of bulk materials is of great importance to stretchable electronics. Here we report large-area, three-dimensional nano-architectures that achieve this outcome in materials that offer both insulating and conductive properties. For the elastomer poly(dimethylsiloxane), such geometries enhance the stretchability and fracture strain by ~ 62 % and ~ 225 % over the bulk, unstructured case. The underlying physics involves local rotations of narrow structural elements in the threedimensional network, as identifi ed by mechanical modelling. To demonstrate the applications of three-dimensional poly(dimethylsiloxane), we create a stretchable conductor obtained by fi lling the interstitial regions with liquid metal. This stretchable composite shows extremely high electrical conductivity ( ~ 24,100 S cm − 1 ) even at strains > 200 % , with good cyclic properties and with current-carrying capacities that are suffi cient for interconnects in light-emitting diode systems. Collectively, these concepts provide new design opportunities for stretchable electronics.

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Section: Fabrication Of 3d Pdmsmentioning

confidence: 99%

Three-dimensional nanonetworks for giant stretchability in dielectrics and conductors

et al. 2012

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“…[1][2][3][4][5] With this unique process, it is possible to produce complex 3D structures with spatial resolution (120 nm) below the diffraction limit of the utilized wavelength. 6 TPIP is a solid free-form fabrication technique where a resin, which contains mainly a multifunctional acrylate-based monomer and a photoinitiator (PI), is cured inside the focal point of a femtosecond pulsed laser.…”

mentioning

confidence: 99%

Synthesis and structure‐activity relationship of several aromatic ketone‐based two‐photon initiators

Siklos

Pucher

et al. 2011

J. Polym. Sci. A Polym. Chem.

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Several novel aromatic ketone-based two-photon initiators containing triple bonds and dialkylamino groups were synthesized and the structure-activity relationships were evaluated. Branched alkyl chains were used at the terminal donor groups to improve the solubility in the multifunctional monomers. Because of the long conjugation length and good coplanarity, the evaluated initiators showed large two-photon cross section values, while their fluorescence lifetimes and quantum yields strongly depend on the solvent polarity. All novel initiators exhibited high activity in terms of two-photon-induced microfabrication. This is especially true for fluorenone-based derivatives, which displayed much broader processing windows than well-known highly active initiators from the literature and commercially available initiators. While the new photoinitiators gave high reactivity in two-photoninduced photopolymerization at concentration as low as 0.1% wt, these compounds are surprisingly stable under one photon condition and nearly no photo initiation activity was found in classical photo DSC experiment.

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“…Bottom-up approaches using self assembled colloids or block copolymers often yield crystal structures with stacking faults or are limited to length scales less than the wavelength of visible light. 5 Using naturally occurring photonic crystals as biotemplates represent an obvious way forward. Bicontinuous cubic structures are not uncommon in nature.…”

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confidence: 99%

Inorganic chiral 3-D photonic crystals with bicontinuous gyroid structure replicated from butterfly wing scales

2011

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Chemical Aspects of Three-Dimensional Photonic Crystals

Abstract: KAIST) under the supervision of Prof. Seung-Man Yang. During his Ph.D. studies, he worked as an exchange graduate student with Prof. David J.

Cited by 250 publications

References 269 publications

Three-dimensional nanonetworks for giant stretchability in dielectrics and conductors

Three-dimensional nanonetworks for giant stretchability in dielectrics and conductors

Synthesis and structure‐activity relationship of several aromatic ketone‐based two‐photon initiators

Inorganic chiral 3-D photonic crystals with bicontinuous gyroid structure replicated from butterfly wing scales

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