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As a new class of fluorescent carbon nanomaterials, CQDs possess the attractive properties of high stability, good conductivity, low toxicity, environmental friendliness, simple synthetic routes as well as comparable optical properties to quantum dots. [6] Carbon quantum dots have been extensively investigated especially due to their strong and ...
A CNT QD is formed when electrons are confined to a small region within a carbon nanotube. This is normally accomplished by application of a voltage to a gate electrode , dragging the valence band of the CNT down in energy, thereby causing electrons to pool in a region in the vicinity of the electrode.
A single-walled carbon nanotubes (SWCNT) can be envisioned as strip of a graphene molecule (a single sheet of graphite) rolled and joined into a seamless cylinder.The structure of the nanotube can be characterized by the width of this hypothetical strip (that is, the circumference c or diameter d of the tube) and the angle α of the strip relative to the main symmetry axes of the hexagonal ...
Print/export Download as PDF ... Cadmium-free quantum dot; Carbon nanotube quantum dot; Carbon quantum dot; D. DNA-functionalized quantum dots; E. Alexander Efros; F.
The chemical and physical properties of platinum nanoparticles (NP) make them applicable for a wide variety of research applications. Extensive experimentation has been done to create new species of platinum NPs, and study their properties. Platinum NP applications include electronics, optics, catalysts, and enzyme immobilization.
where μ is the reduced mass, a is the radius of the quantum dot, m e is the free electron mass, m h is the hole mass, and ε r is the size-dependent dielectric constant. Although the above equations were derived using simplifying assumptions, they imply that the electronic transitions of the quantum dots will depend on their size.
Free radicals in cancer cells induce changes in mechanochemical tumor heterogeneity by modifying bonds which influence the spatial arrangement of molecules in cell structures. The translation of the magnetic force exerted on the tumor and its microenvironment by magnetic nanoparticles into biochemical signaling pathways is known as the magneto ...
Many electronic applications of carbon nanotubes crucially rely on techniques of selectively producing either semiconducting or metallic CNTs, preferably of a certain chirality. [67] Several methods of separating semiconducting and metallic CNTs are known, but most of them are not yet suitable for large-scale technological processes.