Large Area 2D and 3D Colloidal Photonic Crystals Fabricated by a Roll-to-Roll Langmuir–Blodgett Method

Parchine, Mikhail; McGrath, J.; Bardosova, Maria; Pemble, Martyn E.

doi:10.1021/acs.langmuir.6b01242

Cited by 93 publications

(77 citation statements)

References 25 publications

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“…Several self-assembly techniques have been proposed for large-area photonic crystals using spin coating43, doctor blade coating44, spray coating45, and a roll-to-roll Langmuir-Blodgett (LB)46 methods. However, it is still difficult to fabricate highly scalable, defect-free colloidal crystals of non-crosslinked spheres.…”

Section: Resultsmentioning

confidence: 99%

Bio-inspired colorimetric film based on hygroscopic coloration of longhorn beetles (Tmesisternus isabellae)

Han‐Bok

Lee

2017

Sci Rep

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Structure-dependent colour is caused by the interaction of light with photonic crystal structures rather than pigments. The elytra of longhorn beetles Tmesisternus isabellae appear to be iridescent green in a dry state and turn to red when exposed to humidity. Based on the hygroscopic colouration of the longhorn beetle, we have developed centimeter-scale colorimetric opal films using a novel self-assembly method. The micro-channel assisted assembly technique adopts both natural evaporation and rotational forced drying, enhancing the surface binding of silica particles and the packing density by reducing the lattice constant and structural defects. The fabricated large-scale photonic film changes its structural colour from green to red when exposed to water vapour, similarly to the colorimetric feature of the longhorn beetle. The humidity-dependent colour change of the opal film is shown to be reversible and durable over five-hundred cycles of wetting and drying.

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Section: Resultsmentioning

confidence: 99%

Bio-inspired colorimetric film based on hygroscopic coloration of longhorn beetles (Tmesisternus isabellae)

Han‐Bok

Lee

2017

Sci Rep

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“…[1] The current commercial material of choice for their fabrication is indium tin oxide (ITO), which has a high electrical conductivity and is optically transparent due to its large bandgap of ≈3.6 eV. [16,17] Especially promising is the potential use of a wider range of substrates, due to a reduced (or in-)dependence of the structure of the interfacial layer on substrate properties (chemical homogeneity, flatness, wettability). [16,17] Especially promising is the potential use of a wider range of substrates, due to a reduced (or in-)dependence of the structure of the interfacial layer on substrate properties (chemical homogeneity, flatness, wettability).…”

Section: Introductionmentioning

confidence: 99%

“…[2] However, the scarcity of indium and brittleness of the ceramic ITO, in increasing the scalability of Langmuir-Blodgett methods to feasible production levels is understandably beginning to emerge. [16,17] Especially promising is the potential use of a wider range of substrates, due to a reduced (or in-)dependence of the structure of the interfacial layer on substrate properties (chemical homogeneity, flatness, wettability). [18] However, one significant weakness of liquid-based film fabrication is still the lack of in situ characterization.…”

Section: Introductionmentioning

confidence: 99%

Electrically Conductive Thin Films Derived from Bulk Graphite and Liquid–Liquid Interface Assembly

Blair

Çelebi

Müllen

et al. 2018

Adv Materials Inter

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combined with its production by expensive vapor processing methods define an urgent need for alternative materials. One possible alternative material for this is graphene, [3] a 2D allotrope of carbon first described in 2004. [4] Composed of a single layer of carbon atoms, graphene offers high mechanical strength, chemical resistance, and thermal and electrical conductivity while maintaining high optical transparency. [5] What remains a challenge, however, is its exfoliation from bulk graphite in scalable quantity such that applications no longer rely upon expensive bottom-up growth methods such as chemical vapor deposition. [6] Liquid-phase exfoliation of cheap and plentiful bulk graphite provides a low-cost exfoliation method with reported yields typi cally ranging from less than 1% up to 10% by mass of single-or few-layer graphene in organic solvents. [7][8][9][10] Graphite exfoliation by oxidation to nonconductive graphene oxide (GO), followed by reduction to restore sp 2 conjugation in the material, has the benefit of readily producing single sheets of GO in aqueous dispersion. Subsequent reduction, however, is only partial and often accompanied by significant loss of mass of the GO, resulting in compromised electrical and mechanical properties. [11][12][13] Therefore, a method of directly exfoliating bulk graphite to graphene using a very mild electrochemical oxidation [8,14] has the best potential for high yield and good electrical quality. Moreover, a liquid dispersion provides the optimal starting point for fabrication of graphene films prepared using liquid-based film processing techniques.Langmuir-Blodgett deposition is one such technique, capable of fabricating monolayer or multilayer films with well-ordered structures templated on the liquid interface and then transferred to a substrate of choice. Structural control stems from manipulation of the surface pressure of the interfacial material by compression with mechanical barriers, before the substrate is raised or lowered through the interface. Knowledge of the 2D phase behavior and compression state of the material is an important prerequisite for depositing a film with controlled properties. Applicable to a wide range of interfacial systems, it has long been a standard laboratory-scale technique to coat appropriate substrates, including flexible ones, for further analysis and characterization of interfacial films. [15] The combination of low cost and environmental impact with the efficiency of material transfer from the interface to the substrate has meant that interest Confinement of particles to fluid-fluid interfaces provides a unique interaction environment, allowing the directed assembly of particles using lateral capillary forces. The particle laden interfacial layers can be deposited onto a variety of substrates for the fabrication of thin film coatings, designed to have structural or functional properties resulting from the interfacespecific structures. For the fabrication of electrically conducting films and specifically graphene-based co...

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“…The coverage of the nanocrystals reached 77%, 80%, and 91% of the substrates as determined from the SEM images. Note that large‐scale manufacturing of these plasmonic substrates can possibly be achieved using roll‐to‐roll Langmuir–Blodgett technique that allows to transfer large‐area of self‐assembled structures in a continuous manner …”

mentioning

confidence: 99%

“…Note that large-scale manufacturing of these plasmonic substrates can possibly be achieved using roll-to-roll Langmuir-Blodgett technique that allows to transfer large-area of self-assembled structures in a continuous manner. [46] We next tested fluorescence enhancement by these plasmonic substrates for three dyes (BDP-FL, Cy5, and IR-800CW) conjugated to bovine serum albumin (BSA) (Figure 2a), which has a size impermeable to the crosslinked PDA layer. Conjugation to BSA also reduces fluorescence quenching originated from either aggregation of the fluorophores or direct contact with PDA.…”

mentioning

confidence: 99%

A Self‐Assembled Plasmonic Substrate for Enhanced Fluorescence Resonance Energy Transfer

Hou

Chen

et al. 2020

Advanced Materials

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Fluorescence resonance energy transfer (FRET) has found widespread uses in biosensing, molecular imaging, and light harvesting. Plasmonic metal nanostructures offer the possibility of engineering photonic environment of specific fluorophores to enhance the FRET efficiency. However, the potential of plasmonic nanostructures to enable tailored FRET enhancement on planar substrates remains largely unrealized, which are of considerable interest for high‐performance on‐surface bioassays and photovoltaics. The main challenge lies in the necessitated concurrent control over the spectral properties of plasmonic substrates to match that of fluorophores and the fluorophore–substrate spacing. Here, a self‐assembled plasmonic substrate based on polydopamine (PDA)‐coated plasmonic nanocrystals is developed to effectively address this challenge. The PDA coating not only drives interfacial self‐assembly of the nanocrystals to form closely packed arrays with customized optical properties, but also can serve as a tailored nanoscale spacer between the fluorophores and plasmonic nanocrystals, which collectively lead to optimized fluorescence enhancement. The biocompatible plasmonic substrate that allows convenient bioconjugation imparted by PDA has afforded improved FRET efficiency in DNA microarray assay and FRET imaging of live cells. It is envisioned that the self‐assembled plasmonic substrates can be readily integrated into fluorescence‐based platforms for diverse biomedical and photoconversion applications.

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Large Area 2D and 3D Colloidal Photonic Crystals Fabricated by a Roll-to-Roll Langmuir–Blodgett Method

Cited by 93 publications

References 25 publications

Bio-inspired colorimetric film based on hygroscopic coloration of longhorn beetles (Tmesisternus isabellae)

Bio-inspired colorimetric film based on hygroscopic coloration of longhorn beetles (Tmesisternus isabellae)

Electrically Conductive Thin Films Derived from Bulk Graphite and Liquid–Liquid Interface Assembly

A Self‐Assembled Plasmonic Substrate for Enhanced Fluorescence Resonance Energy Transfer

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