Large-area flexible colloidal photonic crystal film stickers for light trapping applications

Kohoutek, T.; Parchine, Mikhail; Bardosova, Maria; Fudouzi, Hiroshi; Pemble, Martyn E.

doi:10.1364/ome.8.000960

Cited by 19 publications

(17 citation statements)

References 21 publications

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“…Among the wide variety of PC forms, the ordered assembly of colloidal nanoparticles, which is known as colloidal crystals, is one of the most promising PC materials [5,6,7]. They have gained increasing attention of researchers during the past decades not only because of the curiosity about the fundamental science of their formation [8,9] but also due to their potential applications in bioassays [10,11], sensors and displays [12,13], security identification [14], anticounterfeiting [15], light trapping in solar cell [16,17] and so on. Besides, colloidal crystals play an important role in the fabrication of inverse opal materials, where they are used as templates [18,19,20].…”

Section: Introductionmentioning

confidence: 99%

“…Langmuir–Blodgett is another broadly-used method where the colloids float and form a monolayer film on a liquid surface. The floating particles assemble into a close-packed arrangement to reduce the available surface area and thus the total surface tension as the film is compressed, which is then “scooped” to a substrate [16,17,34]. Electrostatics can be used to assist the spontaneous assembling process for increasing the fabrication speed [35].…”

Section: Introductionmentioning

confidence: 99%

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Convenient and Efficient Fabrication of Colloidal Crystals Based on Solidification-Induced Colloidal Assembly

et al. 2019

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The simple yet efficient and versatile fabrication of colloidal crystals was investigated based on the solidification-induced colloidal crystallization process with particle/water suspension as precursor. The resulting colloidal crystals were constituted by crystal grains with sizes ranging from several tens of micrometers to a few millimeters. Each of the grains had a close-hexagonal array of colloids, which endowed the bulk colloidal crystal powders with some specific optical properties. The freezing of water was shown as the major driving force to form colloidal crystal grains, which supersaturated the solution with nanoparticles and thus induced the formation and growth of colloidal crystal seeds. This process is intrinsically different from those conventional methods based on shearing force, surface tension, columbic interaction or magnetic interaction, revealing a new strategy to fabricate colloidal crystals in a convenient and efficient way.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Convenient and Efficient Fabrication of Colloidal Crystals Based on Solidification-Induced Colloidal Assembly

et al. 2019

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“…In this contest it is worth mentioning that 2D colloidal crystals are interesting and promising systems for micro and nanopatterning due to their periodicity and specific size [ 7 ]. In micro and nano patterning field, colloidal crystals can be employed as lithographic masks or as molds for the production of micro and nanostructures for light trapping applications [ 8 ] or for the realization of SERS (Surface Enhanced Raman Spectroscopy) substrates [ 9 ]. Furthermore, they can act as masters by means of soft lithography in order to produce hexagonally arrayed structures.…”

Section: Introductionmentioning

confidence: 99%

2D Optical Gratings Based on Hexagonal Voids on Transparent Elastomeric Substrate

Piccolo

Chiappini²,

Armellini³

et al. 2018

Micromachines

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A chromatic vectorial strain sensor constituted by hexagonal voids on transparent elastomeric substrate has been successfully fabricated via soft colloidal lithography. Initially a highly ordered 1.6 microns polystyrene spheres monolayer colloidal crystal has been realized by wedge-shaped cell method and used as a suitable mold to replicate the periodic structure on a polydimethylsiloxane sheet. The replicated 2D array is characterized by high periodicity and regularity over a large area, as evidenced by morphological and optical properties obtained by means of SEM, absorption and reflectance spectroscopy. In particular, the optical features of the nanostructured elastomer have been investigated in respect to uniaxial deformation up to 10% of its initial length, demonstrating a linear, tunable and reversible response, with a sensitivity of 4.5 ± 0.1 nm/%. Finally, it has been demonstrated that the specific geometrical configuration allows determining simultaneously the vectorial strain-stress information in the x and y directions.

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“…Self-assembly refers to the spontaneous process of forming a thermodynamically stable, structurally defined, and specific congeries between structural units such as molecules and nanoparticles through non-covalent interactions under equilibrium conditions. Monodisperse microspheres can be self-assembled in different ways to obtain different kinds, properties, and applications of PCs and other structures such as hollow sphere colloidal PCs [ 16 ], dendritic fibrous nano-silica PCs [ 17 ], large-area silica microspheres/nanospheres [ 18 ], and large-area flexible colloidal photonic crystal film [ 19 , 20 ]. Poly(styrene-methyl methacrylate-acrylic acid) (P(St-MMA-AA)) nanospheres were used to produced polymer colloidal crystals by self-assembly of refrigerated centrifugation [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Silica Microspheres—Inspired by the Formation of Ice Crystals—With High Homogeneous Particle Sizes and Their Applications in Photonic Crystals

et al. 2018

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Silica microspheres (SMs) must possess the performances of desirable monodispersity, narrow particle size distribution, and high sphericity for preparing photonic crystals (PCs) and other materials such as microspheres reference material, etc. We have adopted the techniques of increasing reactant concentration and raising the temperature to improve the synthesis rate of SMs, gaining inspiration from the formation mechanism of ice crystals. SMs with uniform particle sizes (polydispersity index less than 0.05) and good spherical features were fabricated through homogeneous nucleation. The mathematical relationship between particle sizes of SMs and reactant concentrations is further fitted. High accuracy of the regression equation is verified by an F-test and verification experiment. Highly ordered PCs (the stacking fault is about 1.5%, and the point defect is about 10−3) with dense stacked opal structures have been obtained by self-assembly of SMs. In addition, highly ordered PCs (the stacking fault is about 3%, and the point defect is about 10−3) with non-dense packed opal structure and inverse opal structure were successfully prepared. PCs of inverse opal structure were used to examine their response characteristics to identify ethanol, exhibiting good performance. Our research may provide significant inspiration for the development of other sorts of microspheres.

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Large-area flexible colloidal photonic crystal film stickers for light trapping applications

Cited by 19 publications

References 21 publications

Convenient and Efficient Fabrication of Colloidal Crystals Based on Solidification-Induced Colloidal Assembly

Convenient and Efficient Fabrication of Colloidal Crystals Based on Solidification-Induced Colloidal Assembly

2D Optical Gratings Based on Hexagonal Voids on Transparent Elastomeric Substrate

Synthesis of Silica Microspheres—Inspired by the Formation of Ice Crystals—With High Homogeneous Particle Sizes and Their Applications in Photonic Crystals

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