Graphene quantum dots is a class of graphene nanomaterials with exceptional luminescence properties. Precise dimension control of graphene quantum dots produced by chemical synthesis methods is currently difficult to achieve and usually provides a range of sizes from 3 to 25 nm. In this work, fullerene C60 is used as starting material, due to its well-defined dimension, to produce very small graphene quantum dots (∼2-3 nm). Treatment of fullerene C60 with a mixture of strong acid and chemical oxidant induced the oxidation, cage-opening, and fragmentation processes of fullerene C60. The synthesized quantum dots were characterized and supported by LDI-TOF MS, TEM, XRD, XPS, AFM, STM, FTIR, DLS, Raman spectroscopy, and luminescence analyses. The quantum dots remained fully dispersed in aqueous suspension and exhibited strong luminescence properties, with the highest intensity at 460 nm under a 340 nm excitation wavelength. Further chemical treatments with hydrazine hydrate and hydroxylamine resulted in red- and blue-shift of the luminescence, respectively.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/nn505639q | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Integrated cell membrane encapsulated PQDs-TK quantum dot nanoclusters with ROS-responsive triggering for efficient and visualized DNA delivery.
J Colloid Interface Sci
December 2024
School of Life Science and Technology, Wuhan Polytechnic University, Wuhan 430023, China. Electronic address:
With the unique photo-physical properties and strong bio-compatibility. Quantum dots (QDs) have sparked interest in biomedical fields such as imaging, biosensing and therapeutics. However, the low stability and insufficient tumor specificity have largely constrained their potential biomedical applications.
View Article and Find Full Text PDFTiCT MXene Functionalized via Boron Doped MoS Quantum Dots: A Synergy of Heterojunctions and Doping Effect Enabling Ultrasensitive SO Detection at Room Temperature.
Small
December 2024
Centre for Nanoscience and Engineering, Indian Institute of Science, Bengaluru, 560012, India.
The design of mixed-dimensional heterostructures has emerged to be a new frontier of research as it induces exciting physical/chemical properties that extend beyond the fundamental properties of single dimensional systems. Therefore, rational design of heterostructured materials with novel surface chemistry and tailored interfacial properties appears to be very promising for the devices such as the gas sensors. Here, a highly sensitive gas sensor device is constructed by employing heterostructures of boron doped molybdenum disulfide quantum dots (B-MoS Qdots) assembled into the matrix of TiCT MXene.
View Article and Find Full Text PDFSurface Doping to Suppress Iodine Ion Migration for Stable FAPbI Perovskite Quantum Dot Solar Cells.
Small
December 2024
Dalian National Laboratory for Clean Energy, iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.
Formamidine lead iodide (FAPbI) quantum dots (QDs) have attracted great attention as a new generation of photovoltaic material due to their long carrier diffusion length, benign ambient stability, and light-harvesting ability. However, its large surface area with inherent thermodynamic instability and highly defective ionic termination are still major obstacles to fabricating high-performance devices. Herein, a metallic ion dopant is developed to post-treat FAPbI QDs immediately after their fabrication by using a metal-glutamate salt solution.
View Article and Find Full Text PDFEffects of Graphene Quantum Dots on Renal Fibrosis Through Alleviating Oxidative Stress and Restoring Mitochondrial Membrane Potential.
Adv Sci (Weinh)
December 2024
Department of Kidney Research Institute, Seoul National University Medical Research Center, Seoul, South Korea.
Podocyte injury and proteinuria in glomerular disease are critical indicators of acute kidney injury progression to chronic kidney disease. Renal mitochondrial dysfunction, mediated by intracellular calcium levels and oxidative stress, is a major contributor to podocyte complications. Despite various strategies targeting mitochondria to improve kidney function, effective treatments remain lacking.
View Article and Find Full Text PDFBiowaste-Derived Carbon Dots-Based Molecularly Imprinted Fluorescent Nanosensor for Selective Detection of Rutin.
J Fluoresc
December 2024
Jiamusi University, Jiamusi, 154007, China.
In this work, Waste pine nut shells were used as organic carbon source of biomass to synthesize carbon quantum dots. A highly responsive and selective fluorescent nanosensor (Si-doped biomass-derived carbon dots with molecular imprinted polymers, Si-CDs@MIPs) was designed for determination of Rutin (RT) in Chinese herbal substances like Sophora japonica L..
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!