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The supramolecular architectures were designed from lemon-derived carbon dots (LCDs) and curcuminoids. Curcuminoids were used to link the carbon dots to create a supramolecular architecture via an ester linkage. The optical characteristics of curcuminoid-linked lemon carbon dots (CL-LCDs) demonstrated that CL-LCDs-1 can be used for bioimaging applications among all of the LCD derivatives. The HR-TEM and FEG-SEM images showed that the size of all CL-LCD derivatives is nearly 10 nm, which is ideal for the development of effective drug delivery systems. The CL-LCDs were used to encapsulate the anticancer drug methotrexate, which demonstrated a sustained drug release profile under pH stimulus. CL-LCDs-3 exhibited a 27.50% cumulative release at pH 5.5 after 7 days. At pH 7.4, CL-LCDs-3 showed a 19.73% cumulative drug release. MTX-loaded CL-LCDs-1 showed the best anticancer activity against HeLa cells, and the photoluminescence was recovered after the drug release, showing its promising application in the field of tumor imaging.
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http://dx.doi.org/10.1021/acsomega.5c01980 | DOI Listing |
Mikrochim Acta
September 2025
Faculty of Life Science and Technology, Kunming University of Science and Technology, Yunnan Province, 650500, China.
Iron-cerium co-doped carbon dots (Fe,Ce-CDs) were synthesized by one-step hydrothermal method using tartaric acid and L-tryptophan as ligands. Fe,Ce-CDs shows excellent peroxidase-like (POD) activity and nitrite (NO) can promote the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) to its blue oxidation product (oxTMB) due to the formation of ∙NO free radical. NO further react with oxTMB to form a yellow color via diazotization resulting in the absorbance Change at 450 nm.
View Article and Find Full Text PDFFood Chem
September 2025
Institute of Environmental Science, Shanxi University, Taiyuan 030006, China. Electronic address:
Int J Biol Macromol
September 2025
School of Life Science and Technology, Wuhan Polytechnic University, Wuhan, 430023, China. Electronic address:
Quantum dots, with their superior intrinsic fluorescence and photostability, are emerging as a promising option for cancer gene therapy, diagnosis, and imaging. However, low gene delivery efficiency, insufficient targeting, and responsiveness remain challenges. To address these issues, PEI-based carbon quantum dots (CPNCs) were constructed by crosslinking polyethylenimine quantum dots (PQDs) with carbon quantum dots (CQDs) via disulfide bonds.
View Article and Find Full Text PDFFood Chem
September 2025
School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), Ministry of Education, Yantai University, Yantai 264005, China. Electronic address: zh
In this study, a novel carbon dots-based system was developed for the sequential quantification of Au and L-cysteine (L-Cys). The system comprises N,F-doped carbon dots (N,F-CDs), a custom-designed miniaturized fluorimeter, and test strips. The N,F-CDs exhibit outstanding optical properties, including a large Stokes shift (127 nm) and high fluorescence intensity.
View Article and Find Full Text PDFJ Hazard Mater
August 2025
Institute of Environmental Science, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, PR China. Electronic address:
For the first time, long-wavelength red emission carbon dots (R-CDs) were prepared as ratiometric fluorescent and colorimetric dual-mode sensors for detecting ClO using a simple one-step hydrothermal method. R-CDs exhibited intrinsic red fluorescence at 587 nm. Upon interaction with ClO, a new and enhanced green fluorescence at 535 nm was observed, which was attributed to resulting from the oxidation of surface hydroxyl (-OH) groups to carbonyl (CO) groups.
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