Open AccessEnhanced Fluorescence and Environmental Stability of Red-Emissive Carbon Dots via Chemical Bonding with Cellulose Films
Author(s) -
Ye-Qing Chen,
Gaoyang Xiong,
Lina Zhu,
Jie Huang,
Xueying Chen,
Yan Chen,
Mingxuan Cao
Publication year - 2022
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.1c06426
Subject(s) - cellulose , photoluminescence , materials science , carbon fibers , fluorescence , quantum yield , chemical stability , nanocomposite , chemical engineering , quantum dot , chemical bond , nanotechnology , photochemistry , composite number , optoelectronics , chemistry , composite material , optics , organic chemistry , physics , engineering
The development of red emission carbon dots with bright solid-state fluorescence would significantly broaden their application in optoelectronic devices and sensors. Herein, a red-emissive carbon dot-based nanocomposite has been synthesized through chemical bonding with cellulose films. The red emission originating from the surface states of carbon dots was maintained in the cellulose films. Due to the stable chemical bonding, the photoluminescence intensity and emission wavelength remained unchanged for 12 months, and the quantum yield of the composite was enhanced over 4 times. It also showed outstanding stability in water or weak acid-base environments under pHs ranging from 2 to 11. Therefore, the mechanism of chemical bonding that eliminated the defects and preserved the efficient radiative process through surface states was proposed.