Ads
related to: quantum dots fluorescence
Search results
Results from the WOW.Com Content Network
To improve fluorescence quantum yield, quantum dots can be made with shells of a larger bandgap semiconductor material around them. The improvement is suggested to be due to the reduced access of electron and hole to non-radiative surface recombination pathways in some cases, but also due to reduced Auger recombination in others.
The silicon quantum dots emitted stable fluorescence over pH values (2–14) and exhibited strong tolerance to salt and additional reagents. [26] Detection involving formaldehyde quenching the fluorescence of the water soluble silicon dots showing the application of silicon quantum dots involving biochemical detection.
Fluorescence intermittency, or blinking, is the phenomenon of random switching between ON (bright) and OFF (dark) states of the emitter under its continuous excitation. It is a common property of the nanoscale emitters (molecular fluorophores , colloidal quantum dots ) related to the competition between the radiative and non-radiative ...
Some authors have provided evidence of size-dependent fluorescence properties, suggesting that the emission arises from electronic transitions with the core of the dots, influenced by quantum confinement effects, [10] [11] whereas other works, including single particle measurements, [12] have rather attributed the fluorescence to recombination ...
[4] [5] The fluorescence emission of GQDs can extend across a broad spectral range, including the UV, visible, and IR. The origin of GQD fluorescence emission is a subject of debate, as it has been related to quantum confinement effects, defect states and functional groups [6] [7] that might depend on the pH, when GQDs are dispersed in water. [8]
Pages in category "Quantum dots" The following 19 pages are in this category, out of 19 total. ... Fluorescence intermittency; G. Graphene quantum dot; H.
The biocompatibility of silicon quantum dots along with their long luminescent lifetimes and near-infrared emission makes them well-suited for fluorescence imaging in biological systems. Due to this promise, silicon quantum dots have been applied for both in vitro [30] [31] [32] and in vivo imaging.
Quantum dots (QDs) are nano-scale semiconductor particles on the order of 2–10 nm in diameter. They possess electrical properties between those of bulk semi-conductors and individual molecules, as well as optical characteristics that make them suitable for applications where fluorescence is desirable, such as medical imaging.
Ads
related to: quantum dots fluorescence