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Chiral Carbon Dots Synthesized on Cellulose Nanocrystals

Journal Article · · Advanced Optical Materials
 [1];  [2];  [2];  [3];  [4];  [5]
  1. Univ. of Toronto, ON (Canada). Dept. of Chemistry; OSTI
  2. Univ. of Toronto, ON (Canada). Dept. of Chemistry
  3. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics. Soft Materials Research Center
  4. Univ. of Colorado, Boulder, CO (United States). Dept. of Physics. Soft Materials Research Center. Dept. of Electrical, Computer, and Energy Engineering. Materials Science and Engineering Program
  5. Univ. of Toronto, ON (Canada). Dept. of Chemistry. Dept. of Chemical Engineering and Applied Chemistry
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.
Research Organization:
Univ. of Colorado, Boulder, CO (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019293
OSTI ID:
1803667
Alternate ID(s):
OSTI ID: 1579969
Journal Information:
Advanced Optical Materials, Journal Name: Advanced Optical Materials Journal Issue: 4 Vol. 8; ISSN 2195-1071
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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