AI Article Synopsis
- Photoactivation can enhance the photoluminescence and photostability in CdSe/ZnS quantum dots, but it’s less reported in fluorescent carbon quantum dots (CQDs).
- Nitrogen-doped carbon quantum dots (N-CQDs) were created using a simple method, and they demonstrated a significant boost in fluorescence quantum yield (up to 10 times) after just 10 minutes of UV light exposure.
- This research suggests the potential for N-CQDs to serve as a low-cost UV light sensor, which can evaluate sunlight's UV intensity and test the effectiveness of sunscreen products against UV radiation.
Article Abstract
Photoactivation is a phenomenon that could enhance the photoluminescence (PL) and photostability upon UV/vis light exposure, which is usually observed in CdSe/ZnS quantum dots (QDs). However, the photoactivation phenomenon has been scarcely reported in fluorescent carbon quantum dots (CQDs). Herein, the nitrogen-doped carbon quantum dots (N-CQDs) were prepared through a facile solvothermal approach with naphthalenetracarboxylic dianhydride and serine as precursors. Upon simple UV light irradiation for 10 min, the fluorescence quantum yield (QY) of N-CQDs could increase up to 10-fold. Based on this phenomenon, the N-CQDs were explored as an ultraviolet (UV) light sensor to assess the intensity of ultraviolet radiation in sunlight and indirectly evaluate the UV-blocking efficiency of various sunscreen products. Thus, this contribution not only provided an insight into developing a low-cost UV detector but also opened a door for the development of carbon quantum dots with converse-photobleaching properties.
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| http://dx.doi.org/10.1021/acsami.4c07741 | DOI Listing |
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