Assembling semiconductor quantum dots in hierarchical photonic cellulose nanocrystal films: circularly polarized luminescent nanomaterials as optical coding labels

Xu, Mingcong; Ma, Chunhui; Zhou, Jin; Liu, Yushan; Wu, Xueyun; Luo, Sha; Li, Wei; Yu, Haipeng; Wang, Yonggui; Chen, Zhijun; Li, Jian

doi:10.1039/c9tc04144c

Cited by 81 publications

(103 citation statements)

References 40 publications

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“…Strong CPL signals have been observed in photonic films prepared from a mixture of achiral semiconductor NCs and lyotropic liquid crystals of cellulose using CdSe/ZnS QDs [120] and CdSe/CdS QRs [121]. In both cases the formation of a left-handed helical structure leads to the emission of right-handed circularly polarized luminescence with g lum up to -0.3 for QDs and -0.45 for QRs.…”

Section: /-mentioning

confidence: 99%

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Ligand-induced chirality and optical activity in semiconductor nanocrystals: theory and applications

et al. 2020

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Chirality is one of the most fascinating occurrences in the natural world and plays a crucial role in chemistry, biochemistry, pharmacology, and medicine. Chirality has also been envisaged to play an important role in nanotechnology and particularly in nanophotonics, therefore, chiral and chiroptical active nanoparticles (NPs) have attracted a lot of interest over recent years. Optical activity can be induced in NPs in several different ways, including via the direct interaction of achiral NPs with a chiral molecule. This results in circular dichroism (CD) in the region of the intrinsic absorption of the NPs. This interaction in turn affects the optical properties of the chiral molecule. Recently, studies of induced chirality in quantum dots (QDs) has deserved special attention and this phenomenon has been explored in detail in a number of important papers. In this article, we review these important recent advances in the preparation and formation of chiral molecule–QD systems and analyze the mechanisms of induced chirality, the factors influencing CD spectra shape and the intensity of the CD, as well as the effect of QDs on chiral molecules. We also consider potential applications of these types of chiroptical QDs including sensing, bioimaging, enantioselective synthesis, circularly polarized light emitters, and spintronic devices. Finally, we highlight the problems and possibilities that can arise in research areas concerning the interaction of QDs with chiral molecules and that a mutual influence approach must be taken into account particularly in areas, such as photonics, cell imaging, pharmacology, nanomedicine and nanotoxicology.

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Section: /-mentioning

confidence: 99%

“…(B) CPL and (C) DCdirect current (proportional to PL) spectra of cellulose films doped with diааerent semiconductor QDs with PL of different colors. Adapted from a study by Xu et al[120] with permission from The Royal Society of Chemistry.…”

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confidence: 99%

Ligand-induced chirality and optical activity in semiconductor nanocrystals: theory and applications

et al. 2020

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“…HNF has the potential to be used as a template to induce chirality in achiral organic/inorganic materials because of its chiral shape and firmness [77][78][79][80][81][82][83]. If the chirality transfer succeeds in metal nanoparticles [84], fluorescence dye, and additional LC molecules, various chiroptical applications can be rationalized, for example, tailored polarization rotation [82], photonic metamaterial [85], chiral fluorescence [86], etc.…”

Section: Template For Chiral Assembly Of the Guest Materialsmentioning

confidence: 99%

Orientation Control of Helical Nanofilament Phase and Its Chiroptical Applications

Park

Yoon

2020

Crystals

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Chiral liquid crystal phases show fascinating structural and optical properties due to their inherent helical characteristics. Among the various chiral liquid crystal phases, the helical nanofilament phase, made of achiral bent-shaped molecules, has been of keen research interest due to its unusual polar and chiral properties. This review is intended to introduce the recent progress in orientation control and its application to the helical nanofilament phase, which includes topographic confinement, photoalignment, and chiroptical applications such as photonic crystal and chirality sensor.

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“…For example, Chen (Li et al 2019b) got right-handed, tunable fluorescent materials by integrating multiple emissive, up-converting nanoparticles into cellulose nanocrystal based chiral photonic films. Xu et al (2019) constructed transparent and photoluminescent nanocellulose (NC) paper, which contained ZnSe quantum dot (QD) with high quantum yield as a functional filler. Unfortunately, all these improvements could only be realized at the expense of the mechanical properties such as strength and Young's modulus or structural stability because of the poor interfacial interactions.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired structure-robust cellulose nanocrystal films with enhanced water resistance, photothermal conversion ability, and fluorescence

et al. 2020

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Assembling 1D cellulose nanocrystal into robust functional 3D macro-materials can be conducive to the broad application of nanocomposites, but it remains a huge challenge. Inspired by mussel-like adhesion and nacre structures, functionalized sodium alginate was in-situ synthesized with dopamine as a reinforcement agent and an interface jointer for the cellulose nanocrystal (CNC) nanocomposites with excellent mechanical properties. A rhodamine derivative was developed as a structural modifier to extend bulk strength as well as generate outstanding fluorescence. Through facile vacuum-assisted assembly, the resulting nanocomposites showed 210% and 220% increase in strength and Young's modulus respectively, without losing ductility. Such experiment results were much higher than those of the reported. The thermal stability and water resistance were also improved remarkably, with favorable fluorescent and photothermal conversion functionalities. This study explored a promising approach to prepare biomimetic CNC nanocomposites with favorable properties and extra functionality, showing great potentials for various applications in fluorescent probe field.

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Assembling semiconductor quantum dots in hierarchical photonic cellulose nanocrystal films: circularly polarized luminescent nanomaterials as optical coding labels

Abstract: Exploring semiconductor quantum dots (QDs) with circularly polarized luminescence (CPL) is desirable to design optoelectronic devices owing to the easily tunable emission wavelengths and photophysical stability.

Cited by 81 publications

References 40 publications

Ligand-induced chirality and optical activity in semiconductor nanocrystals: theory and applications

Ligand-induced chirality and optical activity in semiconductor nanocrystals: theory and applications

Orientation Control of Helical Nanofilament Phase and Its Chiroptical Applications

Bioinspired structure-robust cellulose nanocrystal films with enhanced water resistance, photothermal conversion ability, and fluorescence

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