Graphene being a zero-gap material, considerable efforts have been made to develop semiconductors whose structure is compatible with its hexagonal lattice. Size reduction is a promising way to achieve this objective. The reduction of both dimensions of graphene leads to graphene quantum dots. Here, we report on a single-emitter study that directly addresses the intrinsic emission properties of graphene quantum dots. In particular, we show that they are efficient and stable single-photon emitters at room temperature and that their emission wavelength can be modified through the functionalization of their edges. Finally, the investigation of the intersystem crossing shows that the short triplet lifetime and the low crossing yield are in agreement with the high brightness of these quantum emitters. These results represent a step-forward in performing chemistry engineering for the design of quantum emitters.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6110725 | PMC |
| http://dx.doi.org/10.1038/s41467-018-05888-w | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Photodynamic bactericidal nanomaterials in food packaging: From principle to application.
J Food Sci
January 2025
Shandong Peanut Research Institute, Key Laboratory of Peanut Biology and Breeding, Ministry of Agriculture and Rural Affairs, Qingdao, PR China.
Compared to traditional preservatives, photodynamic inactivation (PDI) offers a promising bactericidal approach due to its nontoxic nature and low propensity for microbial resistance. In this paper, we initially investigate the principles and antibacterial mechanisms underlying PDI. We then review factors influencing PDI's germicidal efficacy in food preservation.
View Article and Find Full Text PDFA label-free electrochemical biosensor based on graphene quantum dots-nanoporous gold nanocomposite for highly sensitive detection of glioma cell.
Anal Chim Acta
February 2025
School of Life Sciences, The Second Affiliated Hospital, Medical Science and Technology Innovation Center, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, PR China. Electronic address:
Background: Glioma accounts for 80 % of all malignant primary brain tumors with a high mortality rate. Histopathological examination is the current diagnostic methods for glioma, but its invasive surgical interventions can cause cerebral edema or impair neural functioning. Liquid biopsy proves to be an efficient method for glioma detection.
View Article and Find Full Text PDFA Novel Molecularly Imprinted Electrochemiluminescence Sensor Based on Mxene Quantum Dots for Selective Detection of Oseltamivir in Biological Samples.
Molecules
January 2025
School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China.
Oseltamivir is a drug that has been widely used to prevent and treat influenza A and B. In this work, an ultrasensitive, simple, and novel electrochemiluminescence (ECL) sensor combined with molecularly imprinted polymers (MIP-ECL) based on a graphene-like two-dimensional material, Mxene quantum dots (MQDs) was constructed to selectively detect oseltamivir. A molecularly imprinted polymer membrane containing an oseltamivir template was constructed by electropolymerization and elution of modified MQDs on a glassy carbon electrode.
View Article and Find Full Text PDFHigh-sensitivity, high-speed, broadband mid-infrared photodetector enabled by a van der Waals heterostructure with a vertical transport channel.
Nat Commun
January 2025
School of Physics, Key Laboratory of Quantum Materials and Devices of Ministry of Education, and Key Laboratory of MEMS of Ministry of Education, Southeast University, Nanjing, China.
The realization of room-temperature-operated, high-performance, miniaturized, low-power-consumption and Complementary Metal-Oxide-Semiconductor (CMOS)-compatible mid-infrared photodetectors is highly desirable for next-generation optoelectronic applications, but has thus far remained an outstanding challenge using conventional materials. Two-dimensional (2D) heterostructures provide an alternative path toward this goal, yet despite continued efforts, their performance has not matched that of low-temperature HgCdTe photodetectors. Here, we push the detectivity and response speed of a 2D heterostructure-based mid-infrared photodetector to be comparable to, and even superior to, commercial cooled HgCdTe photodetectors by utilizing a vertical transport channel (graphene/black phosphorus/molybdenum disulfide/graphene).
View Article and Find Full Text PDFOn-Surface Synthesis and Characterization of Radical Spins in Kagome Graphene.
ACS Nano
January 2025
Department of Physics, University of Basel, Klingelbergstrasse 82, Basel 4056, Switzerland.
Flat bands in Kagome graphene might host strong electron correlations and frustrated magnetism upon electronic doping. However, the porous nature of Kagome graphene opens a semiconducting gap due to quantum confinement, preventing its fine-tuning by electrostatic gates. Here we induce zero-energy states into a semiconducting Kagome graphene by inserting π-radicals at selected locations.
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!