A convenient method for isolating carbon quantum dots in high yield as an alternative to the dialysis process and the fabrication of a full-band UV blocking polymer film
- Authors
- Uthirakumar, Periyayya; Devendiran, M.; Kim, Tae Hwan; Lee, In-Hwan
- Issue Date
- 21-11월-2018
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- NEW JOURNAL OF CHEMISTRY, v.42, no.22, pp.18312 - 18317
- Indexed
- SCIE
SCOPUS
- Journal Title
- NEW JOURNAL OF CHEMISTRY
- Volume
- 42
- Number
- 22
- Start Page
- 18312
- End Page
- 18317
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/71812
- DOI
- 10.1039/c8nj04615h
- ISSN
- 1144-0546
- Abstract
- We introduce a facile and convenient method to isolate more than 80% carbon quantum dots (CQD), for the first time. The proposed method substitutes a lengthy conventional dialysis process. An organic solvent, n-butanol is used to extract CQD in a high yield with the cumulative particle size distribution at 2.6 nm. The polymer films were fabricated as a function of increasing content of CQD, and shielded full-band UV light. It is found that the presence of surface functional groups in the CQD creates a high level of dispersion in the polymer matrix and it can block >99% of UV light with just 10 mg of CQD. A plausible mechanism is proposed to explain the superior UV shielding properties of the polymer film and is confirmed by protection of a photo-degradable model dye. Due to being non-toxic and environmentally friendly, the CQD dispersed polymer film could be a promising material in the food packaging industry to protect UV sensitive foods.
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Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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