Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Carbon quantum dots (CQDs) have significant applications in nanozymes. However, previous studies have not elucidated the structure-activity relationship and enzyme mechanism. In this study, we employed a one-step microwave method to synthesize ultra-trace Ag-doped carbon quantum dots (Ag-CQDs). In the presence of hydrogen peroxide (HO), we used the oxidative coupling reaction of 3,3',5,5'-tetramethylbenzidine (TMB) to evaluate the intrinsic peroxidase-like activity, kinetics, and mechanism of Ag-CQDs. The trace amount of doped Ag (1.64 %) facilitated electron transfer from the CQDs interior to the surface. The electron transfer triggered the peroxide activity of CQDs, producing hydroxyl radical (·OH), which oxidized the colorless TMB to blue-colored TMB (oxTMB). By coupling with glucose oxidase (GOx), the Ag-CQDs/HO/TMB system has been used for colorimetric glucose determination. The system demonstrated a low detection limit (0.17 µM), wide linear range (0.5-5.5 µM), and satisfactory results when fruit juice was analyzed. This study reports a feasible method for the colorimetric detection of glucose by synthesizing ultra-trace Ag-doped carbon quantum dots with peroxidase-mimicking activity.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodchem.2024.139020 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Recent Biomedical Applications of Carbon Quantum Dots in Cancer Treatment.
J Phys Chem C Nanomater Interfaces
October 2024
Department of Chemistry and Biochemistry, Nanoscale & Quantum Phenomena Institute, Ohio University, Athens, Ohio 45701, United States.
Carbon-based quantum dots (CQDs) have been around for a few decades. Low cell toxicity, good water solubility, excellent and tunable fluorescence properties, and the ability to dope and modify the surface of these CQDs make them an incredible choice for the visualization and treatment of various cancers. This perspective analyzes some recent progress on size-color correlation, modification, and cancer treatment applications of CQDs.
View Article and Find Full Text PDFIntegrating intrinsic lightweight, superhard, and magnetic properties in 3D covalent fullerene C networks: a first-principles study.
Phys Chem Chem Phys
September 2025
School of Physics, Nanjing University of Science and Technology, Nanjing 210094, China.
Multifunctional materials that simultaneously possess intrinsic magnetic and superhard properties, particularly those composed of light elements, have a wide range of applications in advanced sensors, shielding, durable devices, and other fields. However, research on the development and understanding of such materials remains limited. In this study, a series of 3D C covalent networks derived from the C fullerene precursor were theoretically designed.
View Article and Find Full Text PDFPossibility of increasing linear energy transfer in multi-ion radiotherapy for bone and soft tissue sarcomas.
Med Phys
September 2025
Department of Accelerator and Medical Physics, National Institutes for Quantum Science and Technology (QST), Chiba, Japan.
Background: Multi-ion radiotherapy using carbon, oxygen, and neon ions aims to improve local control by increasing dose-averaged linear energy transfer (LET) in the target. However, there has been limited understanding of how to utilize variables for multi-ion treatment planning such as the selection and arrangement of ion species.
Purpose: An in silico study was conducted to explore the feasibility of increasing a minimum LET, and the optimal selection and arrangement of ion species in multi-ion therapy for increasing LET in tumors of varying sizes mimicking bone and soft tissue sarcomas (BSTS).
Starch-based biopolymer films with nitrogen-doped carbon quantum dots for enhanced barrier functions via surface microarchitectures.
Int J Biol Macromol
September 2025
Department of Nanoscience and Nanoengineering, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey; Department of Chemistry, Faculty of Science and Letters, Istanbul Technical University, 34469, Maslak, Istanbul, Turkey. Electronic address:
This study presents the development of multifunctional starch-based biopolymer films reinforced with nitrogen-doped carbon quantum dots (N-CQDs), synthesized via a hydrothermal method, and exhibiting a high quantum yield (~70 %). N-CQDs were incorporated into the starch matrix at varying concentrations (0.1-1.
View Article and Find Full Text PDFCarbon quantum dot-aptamer/MoS nanosheet fluorescent sensor for ultrasensitive, noninvasive cortisol detection.
Anal Bioanal Chem
September 2025
Hebei Key Laboratory of Public Health Safety, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of Ministry of Education, College of Public Health, College of Chemistry and Materials Science, Hebei University, Baoding, 071002, China.
This work presents the development of a highly sensitive, selective, and efficient aptamer-based fluorescent sensor for detecting cortisol in human urine. Carbon quantum dots-nucleic acid aptamer (CQDs-Apt) synthesized with excellent photoluminescent properties and stability, were selected as the fluorescent probe. In the presence of MoS-NSs, CQDs-Apt adsorbed onto the surface of MoS-NSs via electrostatic and π-π interactions, leading to strong and rapid fluorescence quenching due to static quenching mechanism between them.
View Article and Find Full Text PDF