Self-Assembly of Emissive Nanocellulose/Quantum Dot Nanostructures for Chiral Fluorescent Materials

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2019
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Yu, Shengtao
Smith, Marcus J.
Zhou, Jing
Krecker, Michelle
Zhang, Lijuan
Nepal, Dhriti
Bunning, Timothy J.
Tsukruk, Vladimir V.
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ACS Nano. ACS Publications. 2019, 13(8), pp. 9074-9081. ISSN 1936-0851. eISSN 1936-086X. Available under: doi: 10.1021/acsnano.9b03305
Zusammenfassung

Chiral fluorescent materials with fluorescent nanoparticles assembled into a chiral structure represent a grand challenge. Here, we report self-assembled emissive needle-like nanostructures through decorating cellulose nanocrystals (CNCs) with carbon quantum dots (CQDs). This assembly is facilitated by the heterogeneous amphiphilic interactions between natural and synthetic components. These emissive nanostructures can self-organize into chiral nematic solid-state materials with enhanced mechanical performance. The chiral CQD/CNC films demonstrate an intense iridescent appearance superimposed with enhanced luminescence that is significantly higher than that for CQD films and other reported CQD/CNC films. A characteristic fluorescent fingerprint signature is observed in the CQD/CNC film, proving the well-defined chiral organization of fluorescent nanostructures. The chiral organization of CQDs enables the solid CQD/CNC film to form a right-hand chiral fluorescence with an asymmetric factor of -0.2. Additionally, we developed chemical 2D printing and soft lithography patterning techniques to fabricate the freestanding chiral fluorescent patterns that combines mechanical intergrity and chiral nematic structure with light diffraction and emission.

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540 Chemie
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cellulose nanocrystals, carbon quantum dots, chiral fluorescence, self-assembly, fluorescent patterns, liquid crystals, photonic structures, mechanical properties
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ISO 690XIONG, Rui, Shengtao YU, Marcus J. SMITH, Jing ZHOU, Michelle KRECKER, Lijuan ZHANG, Dhriti NEPAL, Timothy J. BUNNING, Vladimir V. TSUKRUK, 2019. Self-Assembly of Emissive Nanocellulose/Quantum Dot Nanostructures for Chiral Fluorescent Materials. In: ACS Nano. ACS Publications. 2019, 13(8), pp. 9074-9081. ISSN 1936-0851. eISSN 1936-086X. Available under: doi: 10.1021/acsnano.9b03305
BibTex
@article{Xiong2019-08-27SelfA-53680,
  year={2019},
  doi={10.1021/acsnano.9b03305},
  title={Self-Assembly of Emissive Nanocellulose/Quantum Dot Nanostructures for Chiral Fluorescent Materials},
  number={8},
  volume={13},
  issn={1936-0851},
  journal={ACS Nano},
  pages={9074--9081},
  author={Xiong, Rui and Yu, Shengtao and Smith, Marcus J. and Zhou, Jing and Krecker, Michelle and Zhang, Lijuan and Nepal, Dhriti and Bunning, Timothy J. and Tsukruk, Vladimir V.}
}
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