Cellulose-Based Reflective Liquid Crystal Films as Optical Filters and Solar Gain Regulators

Cruz, Joshua A. De La; Liu, Qingkun; Senyuk, Bohdan; Frazier, Allister W.; Peddireddy, Karthik; Smalyukh, Ivan I.

doi:10.1021/acsphotonics.8b00289

Cited by 73 publications

(98 citation statements)

References 33 publications

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“…The addition of passive filters allowed colored displays, but limits the chromatic rendering . Pixels based on electrically tunable DBRs might then close the gap between paper and electronic displays . Indeed, large area commercial polymer DBRs have been demonstrated to be efficient for color tuning in electrically driven devices using emitting conjugated polymers .…”

Section: Applicationsmentioning

confidence: 99%

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Lova

Manfredi

Comoretto

2018

Advanced Optical Materials

180

226

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photonic states (PDOS), [2][3][4] which helps explaining the photoluminescence (PL) changes of materials when embedded in the PhC structure.Traditionally, PhCs have been made carving bulky inorganic dielectrics or sem iconductors. These structures are still a hot topic in photonics for optical fibers, light emitting diodes (LEDs), sensors, photo voltaic devices, lasers, discrete and integrated optical components, lightening, and quantum computing. [6] However, new solution processable photoactive materials (e.g., organic semiconductors, quantum dots, hybrid perovskites, and selfassem bling supramolecular systems) stimulated the development of PhCs grown with organic and colloidal materials by solution and melt processes. [7] Among PhCs, distributed Bragg reflectors (DBRs) are cur rently the most interesting owing to their planar structure which generates a simple optical response that represents a playground to understand deep physical concepts, as described in Sections 2.4 and 4. DBRs are indeed made of alternated thin films of different dielectric materials. This simplicity makes them the only PhCs that can take advantage of large area growths (see Section 3.1). [8] Such fabrication methods are unconceivable with bulky inorganic DBRs and might reduce processing costs and enhance customizability, also on industrial scale, thus adding unprecedented market opportunities. Figure 1 illustrates the evolution and fabrications of solution and melt processed DBRs. The top of the Figure displays three wellknown natural DBRs belonging to animal and plant reigns: the mother of pearl, [9] the Panamanian Tortoise beetle exoskel eton, [10] and the Pollia Condensata skin, [11] whose growth is driven by the thermodynamics of spinodal phase separation. [12] The interest in these natural structures leads to their emulation until the development of solutionbased fabrication methods for flexible synthetic DBRs made of polymers and inorganic nanoparticles (Figure 1). At the base of Figure 1, we also show some applications arose only in the last decades. From left to right: the use of DBRs in functional architecture, in enhance ment of photon absorption for photovoltaic cells and modules, emission control, lasing, and sensing. [7c,13] In this paper we will first briefly review the properties of DBRs and then focus on the reasons that guided the research toward new solutionbased and largearea fabrications, describing current processes used both at the laboratory and largearea scales. We will then review the main applications of these structures comparing the performances of mesoporous inorganic and polymer devices. An overview on the properties and applications of polymer and inorganic planar 1D photonic crystals fabricated from solution is provided here. In the last decades, photonic crystals became technologically relevant for light management, photovoltaics, sensing, and lasing. Such structures are traditionally produced by lithographic and vacuum techniques, but the need to reduce costs and to scale-up the fabrication have lea...

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Section: Applicationsmentioning

confidence: 99%

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Lova

Manfredi

Comoretto

2018

Advanced Optical Materials

180

226

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“…Transparent and flexible laminar composite cholesteric-and nematic-like CNC-based films were reported by De La Cruz et al [78]. A three-layer film with helicoidal and nematic-like organization of the cellulose nanocrystals mimics the cuticula of Plusiotis resplendens beetles.…”

Section: Applications; Inspiration Coming From Nature a New World Ofmentioning

confidence: 81%

“…The birefringence of three-layer CNC film can be coarsely or finely tuned when bacterial or cotton CNC are used, respectively. This low-cost high reflective material can be used in colour filters or document security features [78].…”

Section: Applications; Inspiration Coming From Nature a New World Ofmentioning

confidence: 99%

Cholesteric-type cellulosic structures: from plants to applications

et al. 2019

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The structural support of plant cells is provided by the cell wall, which major load-bearing component is an array of hierarchical orientedhierarchical-oriented cellulose nano-, micro-and meso-structures of cellulose microfibrils. Cellulosic structures can respond to humidity changes by expanding or shrinking and this allows, for example, the dispersion of seeds. Previous studies have shown that nanorods, extracted from cell walls, can generate lyotropic liquid crystals that are at the origin of solid cholesteric-like arrangements. Not only photonic films, but also right and left helical filaments, anisotropic films with the ability to bend back and forth under the action of a moisture gradient at room temperature, are some of the materials that were produced from cellulose liquid crystal systems. This work is a review that focus on liquid crystalline-based structures obtained from cellulosic materials and how small perturbations on their structures affect significantly the response to external stimulus and interactions with the environment. Special emphasis is given to cholesteric-like organization of cellulose structures existing in plants, which are an inspiration for the production of the next generation of soft interactive materials.

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“…Due to NPs cytocompatibility, they can be effective in bioimaging besides their applications in targeting, sensing and as drug‐delivery agents. Furthermore, since the CNCs self‐organize into 1D photonic crystal lattices, these hybrid C‐dot/CNC NPs may enable the fabrication of distributed‐feedback mirror‐free cholesteric lasers, and achieve the solar gain control, due to the combination of near‐infrared reflectivity and visible emission, to develop new breeds of solar concentrator for smart windows and other applications …”

Section: Resultsmentioning

confidence: 99%

Chiral Carbon Dots Synthesized on Cellulose Nanocrystals

Chekini

Prince

Zhao

et al. 2019

Advanced Optical Materials

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Hybrid nanoparticles composed of cellulose nanocrystals (CNCs) and carbon‐dots (C‐dots) have promising applications in chemistry, biology, and nanomedicine, owing to the photoluminescence, sensory properties, and cytocompatibility of C‐dots, and chirality, cytobiocompatibility, and high cellular uptake of CNCs. The possibility of circularly polarized luminescence in such nanoparticles is particularly attractive. Herein, scalable and straightforward hydrothermal synthesis of nitrogen‐doped fluorescent C‐dots under reflux condition by using CNCs as a carbon source and chiral substrate is reported. Under ultraviolet irradiation, hybrid C‐dot/CNC nanoparticles exhibit stronger emission of left‐handed, than right‐handed, circularly polarized light, with high dissymmetry factor up to 0.2. The nanoparticles are biocompatible: the normalized proliferation index above 100% is determined for MCF 7 cells cultured in the suspension of C‐dot/CNC nanoparticles. These hybrid nanoparticles can find applications as biotags for labeling, sensing, and therapeutics and as building blocks of photoluminescent cholesteric CNC films with photonic applications.

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Cellulose-Based Reflective Liquid Crystal Films as Optical Filters and Solar Gain Regulators

Cited by 73 publications

References 33 publications

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Advances in Functional Solution Processed Planar 1D Photonic Crystals

Cholesteric-type cellulosic structures: from plants to applications

Chiral Carbon Dots Synthesized on Cellulose Nanocrystals

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