Articles tagged with Graphene Quantum Dots
Researchers at the University of Technology Sydney have discovered a new method for controlling tiny quantum emitters in hexagonal boron nitride by twisting its layered structure. This breakthrough brings them closer to practical applications in quantum computing, secure communication and ultra-sensitive sensing.
Researchers at ETH Zurich have discovered a potential platform for spin qubits in bilayer graphene, with ultra-long-lived valley states. The study finds that the valley degree of freedom in BLG is associated with quantum states that can survive for over half a second.
Graphene quantum dots have been designed to enhance catalytic performance using a diatomic doping strategy, resulting in impressive peroxidase-mimicking activity. This metal-free nanozyme has shown high efficacy in inducing apoptosis and ferroptosis of cancer cells with minimal side effects.
Researchers have developed a hybrid silicon photocatalyst that efficiently produces hydrogen and high-value compounds using solar power. The non-toxic catalyst achieves an impressive rate of 14.2 mmol gcat−1 h−1, significantly higher than conventional silicon photocatalysts.
Researchers at UC Santa Cruz have discovered that graphene quantum dots can detect magnetic fields at the nano scale with high spatial resolution. The unique properties of graphene electrons, which behave like massless particles, create highly sensitive current loops that respond to external magnetic fields.
Researchers from Xi'an Jiaotong-Liverpool University found that brain stimulation combined with a nose spray containing nanoparticles can improve recovery after ischemic stroke. The treatment increased cognitive and motor functions, and weighed more quickly than those treated with TMS alone.
Researchers at KAIST have developed a novel synthesis method for single-crystalline hexagonal graphene quantum dots, which emit stable blue light. The team successfully created homogeneous nucleation of graphene quantum dots through a single-phase reaction.
Researchers have developed graphene quantum dot sensitized C-ZnO nanotaper photoanodes, which demonstrate superior photoconversion efficiency and incident-photon-to-current conversion efficiency. The resulting quantum dot sensitized solar cells exhibit improved photovoltaic performances compared to conventional ZnO-based photoanodes.
Researchers at Rice University have discovered a simple way to recycle waste carbon dioxide into valuable fuel using nitrogen-doped graphene quantum dots. The dots proved nearly as efficient as copper in converting CO2 into small batches of ethylene and ethanol, with the ability to keep their catalytic activity for a long time.
A quantum-confined bandgap narrowing mechanism has been found to extend UV absorption into the visible light range, enabling design of high-efficiency paintable solar cells and water purification using sunlight. The researchers mixed TiO2 particles with graphene quantum dots, resulting in a composite that absorbs visible light.
Researchers created a nanobot on a bacterial spore, using graphene quantum dots to detect changes in humidity. The device, called NERD, responds 10 times faster and is more sensitive in low-humidity situations.
Rice University scientists have discovered a simple method for producing graphene quantum dots in bulk from coal, opening up new opportunities for medical imaging, sensing, and electronic applications. The process allows for control over the size of the dots, which can be tuned to produce different fluorescent wavelengths.
The study successfully creates a device that detects humidity and pressure using graphene quantum dots, showcasing improved sensing capabilities. By manipulating the distance between the quantum dots, the researchers increased conductivity by 43-fold, enabling more accurate measurements.
Researchers at Kansas State University have developed a novel process to produce graphene quantum dots and nano-ribbons with controlled shape and size, revolutionizing electronics and optoelectronics. The process uses diamond knives to cleave graphite into nanoblocks, which are then exfoliated to produce ultrasmall sheets of carbon atoms.
A Rice University-led team discovered a one-step chemical process to create graphene quantum dots from carbon fiber. The sub-5 nanometer carbon-based quantum dots are highly soluble and have controllable size, with potential for biomedical imaging, protein analysis, and cell tracking.